update tradcpp to 0.5.2

release 0.5.2 (20160904)
   - Fix typo in -U usage message, noticed by Joerg.
   - Add a -debuglog option to send an execution trace to a file.
     Intended to be used when debugging imake templates and other
     complex input, not for debugging tradcpp itself.

release 0.5.1 (20150612)
   - Fix a stupid regression in 0.5 that causes it to not recognize a
     pile of options.
   - Fix output corruption caused by mishandling which macros are
     currently in use. In particular, "curmacro" is only valid while
     we're parsing a macro name and arguments, and can change once we
     start expanding, so don't use it to clear the in-use flag. This
     problem has been around all along but was only just exposed.
   - Also don't set curmacro to null after calling expand_domacro as
     that can cause us to think a macro name we just read is defined().
     This one was introduced in 0.5.
   - Don't use "remove" as a local variable as gcc 4.1 gets upset
     about it vs. remove(3) in stdio.h.

release 0.5 (20150612)
   - Don't report unclosed comments as "No newline at end of file".
   - Don't rely on <stdbool.h> existing, as (predictably) it doesn't
     work on Solaris.
   - Similarly, don't rely on C11 anonymous unions as the Solaris
     compiler vomits on them.
   - Typo fix in man page from Jason McIntyre; and change "Usage" to
     "usage" in usage for pedantic reasons, from Igor Sobrado.
   - Accept "-" as either input or output file name to mean stdin or
     stdout respectively. Suggested by Jonathan Gray.
   - Fix output spacing behavior to match gcc when newlines appear in or
     while looking for macro arguments. Partly from Joerg Sonnenberger.
   - Implement __FILE__ and __LINE__ macros. Mostly from Joerg Sonnenberger.
   - Implement #line. Partly from Joerg Sonnenberger.
   - Declare usage() with PF(). From wiz.

Index: array.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/array.h,v
retrieving revision 1.1
diff -u -p -r1.1 array.h
--- array.h     30 Jul 2014 16:33:11 -0000      1.1
+++ array.h     31 Aug 2018 02:12:53 -0000
@@ -253,7 +253,7 @@ array_add(struct array *a, void *val, un
 #define DEFARRAY(T, INLINE) DEFARRAY_BYTYPE(T##array, struct T, INLINE)
 
 #define DESTROYALL_ARRAY(T, INLINE) \
-       void T##array_destroyall(struct T##array *arr); \
+       INLINE void T##array_destroyall(struct T##array *arr);  \
                                                        \
        INLINE void                                     \
        T##array_destroyall(struct T##array *arr)       \
Index: bool.h
===================================================================
RCS file: bool.h
diff -N bool.h
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ bool.h      31 Aug 2018 02:27:18 -0000
@@ -0,0 +1,41 @@
+/*-
+ * Copyright (c) 2015 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by David A. Holland.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef BOOL_H
+#define BOOL_H
+
+#if __STDC__ > 199901
+#include <stdbool.h>
+#else
+typedef int bool;
+#define true 1
+#define false 0
+#endif
+
+#endif /* BOOL_H */
Index: directive.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/directive.c,v
retrieving revision 1.1
diff -u -p -r1.1 directive.c
--- directive.c 30 Jul 2014 16:33:11 -0000      1.1
+++ directive.c 31 Aug 2018 02:12:53 -0000
@@ -28,10 +28,12 @@
  */
 
 #include <assert.h>
-#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
+#include <errno.h>
 
+#include "bool.h"
 #include "utils.h"
 #include "mode.h"
 #include "place.h"
@@ -175,13 +177,16 @@ ifstate_pop(void)
 
 static
 void
-d_if(struct place *p, struct place *p2, char *line)
+d_if(struct lineplace *lp, struct place *p2, char *line)
 {
+       bool doprint;
        char *expr;
        bool val;
        struct place p3 = *p2;
        size_t oldlen;
 
+       doprint = ifstate->curtrue;
+
        expr = macroexpand(p2, line, strlen(line), true);
 
        oldlen = strlen(expr);
@@ -194,41 +199,67 @@ d_if(struct place *p, struct place *p2, 
        } else {
                val = 0;
        }
-       ifstate_push(p, val);
+       ifstate_push(&lp->current, val);
        dostrfree(expr);
+
+       if (doprint) {
+               debuglog(&lp->current, "#if: %s",
+                         ifstate->curtrue ? "taken" : "not taken");
+       }
 }
 
 static
 void
-d_ifdef(struct place *p, struct place *p2, char *line)
+d_ifdef(struct lineplace *lp, struct place *p2, char *line)
 {
+       bool doprint;
+
+       doprint = ifstate->curtrue;
+
        uncomment(line);
        oneword("#ifdef", p2, line);
-       ifstate_push(p, macro_isdefined(line));
+       ifstate_push(&lp->current, macro_isdefined(line));
+
+       if (doprint) {
+               debuglog(&lp->current, "#ifdef %s: %s",
+                        line, ifstate->curtrue ? "taken" : "not taken");
+       }
 }
 
 static
 void
-d_ifndef(struct place *p, struct place *p2, char *line)
+d_ifndef(struct lineplace *lp, struct place *p2, char *line)
 {
+       bool doprint;
+
+       doprint = ifstate->curtrue;
+
        uncomment(line);
        oneword("#ifndef", p2, line);
-       ifstate_push(p, !macro_isdefined(line));
+       ifstate_push(&lp->current, !macro_isdefined(line));
+
+       if (doprint) {
+               debuglog(&lp->current, "#ifndef %s: %s",
+                        line, ifstate->curtrue ? "taken" : "not taken");
+       }
 }
 
 static
 void
-d_elif(struct place *p, struct place *p2, char *line)
+d_elif(struct lineplace *lp, struct place *p2, char *line)
 {
+       bool doprint;
        char *expr;
        struct place p3 = *p2;
        size_t oldlen;
 
        if (ifstate->seenelse) {
-               complain(p, "#elif after #else");
+               complain(&lp->current, "#elif after #else");
                complain_fail();
        }
 
+       doprint = ifstate->curtrue;
+
        if (ifstate->evertrue) {
                ifstate->curtrue = false;
        } else {
@@ -243,36 +274,52 @@ d_elif(struct place *p, struct place *p2
                ifstate->evertrue = ifstate->curtrue;
                dostrfree(expr);
        }
+
+       if (doprint) {
+               debuglog2(&lp->current, &ifstate->startplace, "#elif: %s",
+                         ifstate->curtrue ? "taken" : "not taken");
+       }
 }
 
 static
 void
-d_else(struct place *p, struct place *p2, char *line)
+d_else(struct lineplace *lp, struct place *p2, char *line)
 {
+       bool doprint;
+
        (void)p2;
        (void)line;
 
        if (ifstate->seenelse) {
-               complain(p, "Multiple #else directives in one conditional");
+               complain(&lp->current,
+                        "Multiple #else directives in one conditional");
                complain_fail();
        }
 
+       doprint = ifstate->curtrue;
+
        ifstate->curtrue = !ifstate->evertrue;
        ifstate->evertrue = true;
        ifstate->seenelse = true;
+
+       if (doprint) {
+               debuglog2(&lp->current, &ifstate->startplace, "#else: %s",
+                         ifstate->curtrue ? "taken" : "not taken");
+       }
 }
 
 static
 void
-d_endif(struct place *p, struct place *p2, char *line)
+d_endif(struct lineplace *lp, struct place *p2, char *line)
 {
        (void)p2;
        (void)line;
 
        if (ifstate->prev == NULL) {
-               complain(p, "Unmatched #endif");
+               complain(&lp->current, "Unmatched #endif");
                complain_fail();
        } else {
+               debuglog2(&lp->current, &ifstate->startplace, "#endif");
                ifstate_pop();
        }
 }
@@ -282,12 +329,12 @@ d_endif(struct place *p, struct place *p
 
 static
 void
-d_define(struct place *p, struct place *p2, char *line)
+d_define(struct lineplace *lp, struct place *p2, char *line)
 {
        size_t pos, argpos;
        struct place p3, p4;
 
-       (void)p;
+       (void)lp;
 
        /*
         * line may be:
@@ -337,22 +384,25 @@ d_define(struct place *p, struct place *
        p4.column += pos;
 
        if (argpos) {
+               debuglog(&lp->current, "Defining %s()", line);
                macro_define_params(p2, line, &p3,
                                    line + argpos, &p4,
                                    line + pos);
        } else {
+               debuglog(&lp->current, "Defining %s", line);
                macro_define_plain(p2, line, &p4, line + pos);
        }
 }
 
 static
 void
-d_undef(struct place *p, struct place *p2, char *line)
+d_undef(struct lineplace *lp, struct place *p2, char *line)
 {
-       (void)p;
+       (void)lp;
 
        uncomment(line);
        oneword("#undef", p2, line);
+       debuglog(&lp->current, "Undef %s", line);
        macro_undef(line);
 }
 
@@ -368,13 +418,17 @@ tryinclude(struct place *p, char *line)
        len = strlen(line);
        if (len > 2 && line[0] == '"' && line[len-1] == '"') {
                line[len-1] = '\0';
+               debuglog(p, "Entering include file \"%s\"", line+1);
                file_readquote(p, line+1);
+               debuglog(p, "Leaving include file \"%s\"", line+1);
                line[len-1] = '"';
                return true;
        }
        if (len > 2 && line[0] == '<' && line[len-1] == '>') {
                line[len-1] = '\0';
+               debuglog(p, "Entering include file <%s>", line+1);
                file_readbracket(p, line+1);
+               debuglog(p, "Leaving include file <%s>", line+1);
                line[len-1] = '>';
                return true;
        }
@@ -383,13 +437,13 @@ tryinclude(struct place *p, char *line)
 
 static
 void
-d_include(struct place *p, struct place *p2, char *line)
+d_include(struct lineplace *lp, struct place *p2, char *line)
 {
        char *text;
        size_t oldlen;
 
        uncomment(line);
-       if (tryinclude(p, line)) {
+       if (tryinclude(&lp->current, line)) {
                return;
        }
        text = macroexpand(p2, line, strlen(line), false);
@@ -399,26 +453,78 @@ d_include(struct place *p, struct place 
        /* trim to fit, so the malloc debugging won't complain */
        text = dorealloc(text, oldlen + 1, strlen(text) + 1);
 
-       if (tryinclude(p, text)) {
+       if (tryinclude(&lp->current, text)) {
                dostrfree(text);
                return;
        }
-       complain(p, "Illegal #include directive");
-       complain(p, "Before macro expansion: #include %s", line);
-       complain(p, "After macro expansion: #include %s", text);
+       complain(&lp->current, "Illegal #include directive");
+       complain(&lp->current, "Before macro expansion: #include %s", line);
+       complain(&lp->current, "After macro expansion: #include %s", text);
        dostrfree(text);
        complain_fail();
 }
 
 static
 void
-d_line(struct place *p, struct place *p2, char *line)
+d_line(struct lineplace *lp, struct place *p2, char *line)
 {
-       (void)p2;
-       (void)line;
+       char *text;
+       size_t oldlen;
+       unsigned long val;
+       char *moretext;
+       size_t moretextlen;
+       char *filename;
+
+       text = macroexpand(p2, line, strlen(line), true);
+
+       oldlen = strlen(text);
+       uncomment(text);
+       /* trim to fit, so the malloc debugging won't complain */
+       text = dorealloc(text, oldlen + 1, strlen(text) + 1);
 
-       /* XXX */
-       complain(p, "Sorry, no #line yet");
+       /*
+        * What we should have here: either 1234 "file.c",
+        * or just 1234.
+        */
+
+       errno = 0;
+       val = strtoul(text, &moretext, 10);
+       if (errno) {
+               complain(&lp->current, "No line number in #line directive");
+               goto fail;
+       }
+#if UINT_MAX < ULONG_MAX
+       if (val > UINT_MAX) {
+               complain(&lp->current,
+                        "Line number in #line directive too large");
+               goto fail;
+       }
+#endif
+       moretext += strspn(moretext, ws);
+       moretextlen = strlen(moretext);
+       lp->current.column += (moretext - text);
+
+       if (moretextlen > 2 &&
+           moretext[0] == '"' && moretext[moretextlen-1] == '"') {
+               filename = dostrndup(moretext+1, moretextlen-2);
+               place_changefile(&lp->nextline, filename);
+               dostrfree(filename);
+       }
+       else if (moretextlen > 0) {
+               complain(&lp->current,
+                        "Invalid file name in #line directive");
+               goto fail;
+       }
+
+       lp->nextline.line = val;
+       dostrfree(text);
+       return;
+
+fail:
+       complain(&lp->current, "Before macro expansion: #line %s", line);
+       complain(&lp->current, "After macro expansion: #line %s", text);
+       complain_fail();
+       dostrfree(text);
 }
 
 ////////////////////////////////////////////////////////////
@@ -426,12 +532,12 @@ d_line(struct place *p, struct place *p2
 
 static
 void
-d_warning(struct place *p, struct place *p2, char *line)
+d_warning(struct lineplace *lp, struct place *p2, char *line)
 {
        char *msg;
 
        msg = macroexpand(p2, line, strlen(line), false);
-       complain(p, "#warning: %s", msg);
+       complain(&lp->current, "#warning: %s", msg);
        if (mode.werror) {
                complain_fail();
        }
@@ -440,12 +546,12 @@ d_warning(struct place *p, struct place 
 
 static
 void
-d_error(struct place *p, struct place *p2, char *line)
+d_error(struct lineplace *lp, struct place *p2, char *line)
 {
        char *msg;
 
        msg = macroexpand(p2, line, strlen(line), false);
-       complain(p, "#error: %s", msg);
+       complain(&lp->current, "#error: %s", msg);
        complain_fail();
        dostrfree(msg);
 }
@@ -455,11 +561,11 @@ d_error(struct place *p, struct place *p
 
 static
 void
-d_pragma(struct place *p, struct place *p2, char *line)
+d_pragma(struct lineplace *lp, struct place *p2, char *line)
 {
        (void)p2;
 
-       complain(p, "#pragma %s", line);
+       complain(&lp->current, "#pragma %s", line);
        complain_fail();
 }
 
@@ -469,7 +575,7 @@ d_pragma(struct place *p, struct place *
 static const struct {
        const char *name;
        bool ifskip;
-       void (*func)(struct place *, struct place *, char *line);
+       void (*func)(struct lineplace *, struct place *, char *line);
 } directives[] = {
        { "define",  true,  d_define },
        { "elif",    false, d_elif },
@@ -489,13 +595,13 @@ static const unsigned numdirectives = HO
 
 static
 void
-directive_gotdirective(struct place *p, char *line)
+directive_gotdirective(struct lineplace *lp, char *line)
 {
        struct place p2;
        size_t len, skip;
        unsigned i;
 
-       p2 = *p;
+       p2 = lp->current;
        for (i=0; i<numdirectives; i++) {
                len = strlen(directives[i].name);
                if (!strncmp(line, directives[i].name, len) &&
@@ -512,7 +618,7 @@ directive_gotdirective(struct place *p, 
                        if (len < strlen(line)) {
                                line[len] = '\0';
                        }
-                       directives[i].func(p, &p2, line);
+                       directives[i].func(lp, &p2, line);
                        return;
                }
        }
@@ -523,7 +629,7 @@ directive_gotdirective(struct place *p, 
        }
 
        skip = strcspn(line, ws);
-       complain(p, "Unknown directive #%.*s", (int)skip, line);
+       complain(&lp->current, "Unknown directive #%.*s", (int)skip, line);
        complain_fail();
 }
 
@@ -532,13 +638,13 @@ directive_gotdirective(struct place *p, 
  */
 static
 size_t
-directive_scancomments(const struct place *p, char *line, size_t len)
+directive_scancomments(const struct lineplace *lp, char *line, size_t len)
 {
        size_t pos;
        bool incomment;
        struct place p2;
 
-       p2 = *p;
+       p2 = lp->current;
        incomment = 0;
        for (pos = 0; pos+1 < len; pos++) {
                if (line[pos] == '/' && line[pos+1] == '*') {
@@ -574,25 +680,25 @@ directive_scancomments(const struct plac
 }
 
 void
-directive_gotline(struct place *p, char *line, size_t len)
+directive_gotline(struct lineplace *lp, char *line, size_t len)
 {
        size_t skip;
 
        if (warns.nestcomment) {
-               directive_scancomments(p, line, len);
+               directive_scancomments(lp, line, len);
        }
 
        /* check if we have a directive line (# exactly in column 0) */
-       if (line[0] == '#') {
+       if (len > 0 && line[0] == '#') {
                skip = 1 + strspn(line + 1, ws);
                assert(skip <= len);
-               p->column += skip;
+               lp->current.column += skip;
                assert(line[len] == '\0');
-               directive_gotdirective(p, line+skip /*, length = len-skip */);
-               p->column += len-skip;
+               directive_gotdirective(lp, line+skip /*, length = len-skip */);
+               lp->current.column += len-skip;
        } else if (ifstate->curtrue) {
-               macro_sendline(p, line, len);
-               p->column += len;
+               macro_sendline(&lp->current, line, len);
+               lp->current.column += len;
        }
 }
 
Index: directive.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/directive.h,v
retrieving revision 1.1
diff -u -p -r1.1 directive.h
--- directive.h 30 Jul 2014 16:33:11 -0000      1.1
+++ directive.h 31 Aug 2018 02:12:53 -0000
@@ -29,11 +29,21 @@
 
 #include <stddef.h>
 
-struct place;
+#include "place.h"
+
+/*
+ * Relevant places while we're processing a line:
+ *   the place in the current line
+ *   the beginning of the next line
+ */
+struct lineplace {
+       struct place current;
+       struct place nextline;
+};
 
 void directive_init(void);
 void directive_cleanup(void);
 
-void directive_gotline(struct place *p, char *line, size_t len);
+void directive_gotline(struct lineplace *lp, char *line, size_t len);
 void directive_goteof(struct place *p);
 
Index: eval.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/eval.c,v
retrieving revision 1.1
diff -u -p -r1.1 eval.c
--- eval.c      30 Jul 2014 16:33:11 -0000      1.1
+++ eval.c      31 Aug 2018 02:12:53 -0000
@@ -642,6 +642,7 @@ wordval(struct place *p, char *word)
                        complain_fail();
                }
        }
+       debuglog(p, "Undefined symbol %s; substituting 0", word);
        return 0;
 }
 
@@ -744,6 +745,7 @@ eval(struct place *p, char *expr)
 #ifdef DEBUG
        fprintf(stderr, "eval: %s\n", expr);
 #endif
+       debuglog(p, "eval: %s", expr);
 
        tokenarray_init(&tokens);
        tokenize(p, expr);
Index: eval.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/eval.h,v
retrieving revision 1.1
diff -u -p -r1.1 eval.h
--- eval.h      30 Jul 2014 16:33:11 -0000      1.1
+++ eval.h      31 Aug 2018 02:12:53 -0000
@@ -27,6 +27,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
+#include "bool.h"
 
 bool eval(struct place *p, char *expr);
Index: files.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/files.c,v
retrieving revision 1.3
diff -u -p -r1.3 files.c
--- files.c     17 Jan 2015 05:31:29 -0000      1.3
+++ files.c     31 Aug 2018 02:33:55 -0000
@@ -27,7 +27,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -35,6 +34,7 @@
 #include <fcntl.h>
 #include <errno.h>
 
+#include "bool.h"
 #include "array.h"
 #include "mode.h"
 #include "place.h"
@@ -172,14 +172,21 @@ static
 void
 file_read(const struct placefile *pf, int fd, const char *name, bool toplevel)
 {
-       struct place linestartplace, nextlinestartplace, ptmp;
+       struct lineplace places;
+       struct place ptmp;
        size_t bufend, bufmax, linestart, lineend, nextlinestart, tmp;
        ssize_t result;
        bool ateof = false;
        char *buf;
 
-       place_setfilestart(&linestartplace, pf);
-       nextlinestartplace = linestartplace;
+       place_setfilestart(&places.current, pf);
+       places.nextline = places.current;
+
+       if (name) {
+               debuglog(&places.current, "Reading file %s", name);
+       } else {
+               debuglog(&places.current, "Reading standard input");
+       }
 
        bufmax = 128;
        bufend = 0;
@@ -223,9 +230,15 @@ file_read(const struct placefile *pf, in
                        } else if (result == 0) {
                                /* eof in middle of line */
                                ateof = true;
-                               ptmp = linestartplace;
+                               ptmp = places.current;
                                ptmp.column += bufend - linestart;
-                               complain(&ptmp, "No newline at end of file");
+                               if (buf[bufend - 1] == '\n') {
+                                       complain(&ptmp, "Unclosed comment");
+                                       complain_fail();
+                               } else {
+                                       complain(&ptmp,
+                                                "No newline at end of file");
+                               }
                                if (mode.werror) {
                                        complain_fail();
                                }
@@ -244,7 +257,7 @@ file_read(const struct placefile *pf, in
                assert(buf[lineend] == '\n');
                buf[lineend] = '\0';
                nextlinestart = lineend+1;
-               nextlinestartplace.line++;
+               places.nextline.line++;
 
                /* check for CR/NL */
                if (lineend > 0 && buf[lineend-1] == '\r') {
@@ -271,21 +284,18 @@ file_read(const struct placefile *pf, in
                assert(buf[lineend] == '\0');
 
                /* count how many commented-out newlines we swallowed */
-               nextlinestartplace.line += countnls(buf, linestart, lineend);
+               places.nextline.line += countnls(buf, linestart, lineend);
 
-               /* if the line isn't empty, process it */
-               if (lineend > linestart) {
-                       directive_gotline(&linestartplace,
-                                         buf+linestart, lineend-linestart);
-               }
+               /* process the line (even if it's empty) */
+               directive_gotline(&places, buf+linestart, lineend-linestart);
 
                linestart = nextlinestart;
                lineend = findeol(buf, linestart, bufend);
-               linestartplace = nextlinestartplace;
+               places.current = places.nextline;
        }
 
        if (toplevel) {
-               directive_goteof(&linestartplace);
+               directive_goteof(&places.current);
        }
        dofree(buf, bufmax);
 }
@@ -396,7 +406,7 @@ file_readabsolute(struct place *place, c
 
        assert(place != NULL);
 
-       if ((name == NULL) || !strcmp(name, "-")) {
+       if (name == NULL) {
                fd = STDIN_FILENO;
                pf = place_addfile(place, "<standard-input>", false);
        } else {
Index: macro.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/macro.c,v
retrieving revision 1.2
diff -u -p -r1.2 macro.c
--- macro.c     17 Jan 2015 05:31:29 -0000      1.2
+++ macro.c     31 Aug 2018 02:25:59 -0000
@@ -28,9 +28,11 @@
  */
 
 #include <stdint.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "union.h"
 #include "array.h"
 #include "mode.h"
 #include "place.h"
@@ -38,15 +40,21 @@
 #include "output.h"
 
 struct expansionitem {
-       bool isstring;
+       enum { EI_STRING, EI_PARAM, EI_FILE, EI_LINE } itemtype;
        union {
-               char *string;
-               unsigned param;
-       };
+               char *ei_string;                /* for EI_STRING */
+               unsigned ei_param;              /* for EI_PARAM */
+       } UN;
 };
 DECLARRAY(expansionitem, static UNUSED);
 DEFARRAY(expansionitem, static);
 
+#ifdef NEED_UNION_ACCESSORS
+#define ei_string un.ei_string
+#define ei_param un.ei_param
+#endif
+
+
 struct macro {
        struct place defplace;
        struct place expansionplace;
@@ -76,8 +84,8 @@ expansionitem_create_string(const char *
        struct expansionitem *ei;
 
        ei = domalloc(sizeof(*ei));
-       ei->isstring = true;
-       ei->string = dostrdup(string);
+       ei->itemtype = EI_STRING;
+       ei->ei_string = dostrdup(string);
        return ei;
 }
 
@@ -88,8 +96,8 @@ expansionitem_create_stringlen(const cha
        struct expansionitem *ei;
 
        ei = domalloc(sizeof(*ei));
-       ei->isstring = true;
-       ei->string = dostrndup(string, len);
+       ei->itemtype = EI_STRING;
+       ei->ei_string = dostrndup(string, len);
        return ei;
 }
 
@@ -100,8 +108,30 @@ expansionitem_create_param(unsigned para
        struct expansionitem *ei;
 
        ei = domalloc(sizeof(*ei));
-       ei->isstring = false;
-       ei->param = param;
+       ei->itemtype = EI_PARAM;
+       ei->ei_param = param;
+       return ei;
+}
+
+static
+struct expansionitem *
+expansionitem_create_file(void)
+{
+       struct expansionitem *ei;
+
+       ei = domalloc(sizeof(*ei));
+       ei->itemtype = EI_FILE;
+       return ei;
+}
+
+static
+struct expansionitem *
+expansionitem_create_line(void)
+{
+       struct expansionitem *ei;
+
+       ei = domalloc(sizeof(*ei));
+       ei->itemtype = EI_LINE;
        return ei;
 }
 
@@ -109,8 +139,14 @@ static
 void
 expansionitem_destroy(struct expansionitem *ei)
 {
-       if (ei->isstring) {
-               dostrfree(ei->string);
+       switch (ei->itemtype) {
+           case EI_STRING:
+               dostrfree(ei->ei_string);
+               break;
+           case EI_PARAM:
+           case EI_FILE:
+           case EI_LINE:
+               break;
        }
        dofree(ei, sizeof(*ei));
 }
@@ -120,17 +156,23 @@ bool
 expansionitem_eq(const struct expansionitem *ei1,
                 const struct expansionitem *ei2)
 {
-       if (ei1->isstring != ei2->isstring) {
+       if (ei1->itemtype != ei2->itemtype) {
                return false;
        }
-       if (ei1->isstring) {
-               if (strcmp(ei1->string, ei2->string) != 0) {
+       switch (ei1->itemtype) {
+           case EI_STRING:
+               if (strcmp(ei1->ei_string, ei2->ei_string) != 0) {
                        return false;
                }
-       } else {
-               if (ei1->param != ei2->param) {
+               break;
+           case EI_PARAM:
+               if (ei1->ei_param != ei2->ei_param) {
                        return false;
                }
+               break;
+           case EI_FILE:
+           case EI_LINE:
+               break;
        }
        return true;
 }
@@ -298,7 +340,7 @@ macrotable_cleanup(void)
 
 static
 struct macro *
-macrotable_findlen(const char *name, size_t len, bool remove)
+macrotable_findlen(const char *name, size_t len, bool remove_it)
 {
        unsigned hash;
        struct macroarray *bucket;
@@ -319,7 +361,7 @@ macrotable_findlen(const char *name, siz
                }
                mlen = strlen(m->name);
                if (len == mlen && !memcmp(name, m->name, len)) {
-                       if (remove) {
+                       if (remove_it) {
                                if (i < num-1) {
                                        m2 = macroarray_get(bucket, num-1);
                                        macroarray_set(bucket, i, m2);
@@ -335,9 +377,9 @@ macrotable_findlen(const char *name, siz
 
 static
 struct macro *
-macrotable_find(const char *name, bool remove)
+macrotable_find(const char *name, bool remove_it)
 {
-       return macrotable_findlen(name, strlen(name), remove);
+       return macrotable_findlen(name, strlen(name), remove_it);
 }
 
 static
@@ -587,6 +629,24 @@ macro_define_params(struct place *p1, co
 }
 
 void
+macro_define_magic(struct place *p, const char *macro)
+{
+       struct macro *m;
+       struct expansionitem *ei;
+
+       m = macro_define_common_start(p, macro, p);
+       if (!strcmp(macro, "__FILE__")) {
+               ei = expansionitem_create_file();
+       }
+       else {
+               assert(!strcmp(macro, "__LINE__"));
+               ei = expansionitem_create_line();
+       }
+       expansionitemarray_add(&m->expansion, ei, NULL);
+       macro_define_common_end(m);
+}
+
+void
 macro_undef(const char *macro)
 {
        struct macro *m;
@@ -624,7 +684,7 @@ struct expstate {
 static struct expstate mainstate;
 
 static void doexpand(struct expstate *es, struct place *p,
-                    char *buf, size_t len);
+                    const char *buf, size_t len);
 
 static
 void
@@ -705,7 +765,7 @@ expand_send_eof(struct expstate *es, str
 
 static
 void
-expand_newarg(struct expstate *es, char *buf, size_t len)
+expand_newarg(struct expstate *es, const char *buf, size_t len)
 {
        char *text;
 
@@ -715,7 +775,7 @@ expand_newarg(struct expstate *es, char 
 
 static
 void
-expand_appendarg(struct expstate *es, char *buf, size_t len)
+expand_appendarg(struct expstate *es, const char *buf, size_t len)
 {
        unsigned num;
        char *text;
@@ -742,6 +802,7 @@ expand_substitute(struct place *p, struc
        char *arg;
        char *ret;
        unsigned numargs, numparams;
+       char numbuf[64];
 
        numargs = stringarray_num(&es->args);
        numparams = stringarray_num(&es->curmacro->params);
@@ -766,11 +827,20 @@ expand_substitute(struct place *p, struc
        num = expansionitemarray_num(&es->curmacro->expansion);
        for (i=0; i<num; i++) {
                ei = expansionitemarray_get(&es->curmacro->expansion, i);
-               if (ei->isstring) {
-                       len += strlen(ei->string);
-               } else {
-                       arg = stringarray_get(&es->args, ei->param);
+               switch (ei->itemtype) {
+                   case EI_STRING:
+                       len += strlen(ei->ei_string);
+                       break;
+                   case EI_PARAM:
+                       arg = stringarray_get(&es->args, ei->ei_param);
                        len += strlen(arg);
+                       break;
+                   case EI_FILE:
+                       len += strlen(place_getname(p)) + 2;
+                       break;
+                   case EI_LINE:
+                       len += snprintf(numbuf, sizeof(numbuf), "%u", p->line);
+                       break;
                }
        }
 
@@ -778,11 +848,23 @@ expand_substitute(struct place *p, struc
        *ret = '\0';
        for (i=0; i<num; i++) {
                ei = expansionitemarray_get(&es->curmacro->expansion, i);
-               if (ei->isstring) {
-                       strlcat(ret, ei->string, len+1);
-               } else {
-                       arg = stringarray_get(&es->args, ei->param);
-                       strlcat(ret, arg, len+1);
+               switch (ei->itemtype) {
+                   case EI_STRING:
+                       strlcat(ret, ei->ei_string, len + 1);
+                       break;
+                   case EI_PARAM:
+                       arg = stringarray_get(&es->args, ei->ei_param);
+                       strlcat(ret, arg, len + 1);
+                       break;
+                   case EI_FILE:
+                       strlcat(ret, "\"", len + 1);
+                       strlcat(ret, place_getname(p), len + 1);
+                       strlcat(ret, "\"", len + 1);
+                       break;
+                   case EI_LINE:
+                       snprintf(numbuf, sizeof(numbuf), "%u", p->line);
+                       strlcat(ret, numbuf, len + 1);
+                       break;
                }
        }
 
@@ -794,6 +876,7 @@ void
 expand_domacro(struct expstate *es, struct place *p)
 {
        struct macro *m;
+       const char *name, *val;
        char *newbuf, *newbuf2;
 
        if (es->curmacro == NULL) {
@@ -804,23 +887,32 @@ expand_domacro(struct expstate *es, stru
                        expand_send(es, p, "0", 1);
                        return;
                }
-               m = macrotable_find(stringarray_get(&es->args, 0), false);
-               expand_send(es, p, (m != NULL) ? "1" : "0", 1);
+               name = stringarray_get(&es->args, 0);
+               m = macrotable_find(name, false);
+               val = (m != NULL) ? "1" : "0";
+               debuglog(p, "defined(%s): %s", name, val); 
+               expand_send(es, p, val, 1);
                expstate_destroyargs(es);
                return;
        }
 
-       assert(es->curmacro->inuse == false);
-       es->curmacro->inuse = true;
+       m = es->curmacro;
+       assert(m->inuse == false);
+       m->inuse = true;
 
+       debuglog(p, "Expanding macro %s", m->name);
        newbuf = expand_substitute(p, es);
+       debuglog(p, "Substituting for %s: %s", m->name, newbuf);
+
        newbuf2 = macroexpand(p, newbuf, strlen(newbuf), false);
        dostrfree(newbuf);
        expstate_destroyargs(es);
+       debuglog(p, "Complete expansion for %s: %s", m->name, newbuf2);
+
        doexpand(es, p, newbuf2, strlen(newbuf2));
        dostrfree(newbuf2);
 
-       es->curmacro->inuse = false;
+       m->inuse = false;
 }
 
 /*
@@ -846,13 +938,16 @@ expand_missingargs(struct expstate *es, 
 
 static
 void
-expand_got_ws(struct expstate *es, struct place *p, char *buf, size_t len)
+expand_got_ws(struct expstate *es, struct place *p,
+             const char *buf, size_t len)
 {
        switch (es->state) {
            case ES_NORMAL:
                expand_send(es, p, buf, len);
                break;
            case ES_WANTLPAREN:
+               /* XXX notyet */
+               //expand_send(es, p, buf, len);
                break;
            case ES_NOARG:
                expand_newarg(es, buf, len);
@@ -866,11 +961,10 @@ expand_got_ws(struct expstate *es, struc
 
 static
 void
-expand_got_word(struct expstate *es, struct place *p, char *buf, size_t len)
+expand_got_word(struct expstate *es, struct place *p,
+               const char *buf, size_t len)
 {
        struct macro *m;
-       struct expansionitem *ei;
-       char *newbuf;
 
        switch (es->state) {
            case ES_NORMAL:
@@ -884,15 +978,8 @@ expand_got_word(struct expstate *es, str
                if (m == NULL || m->inuse) {
                        expand_send(es, p, buf, len);
                } else if (!m->hasparams) {
-                       m->inuse = true;
-                       assert(expansionitemarray_num(&m->expansion) == 1);
-                       ei = expansionitemarray_get(&m->expansion, 0);
-                       assert(ei->isstring);
-                       newbuf = macroexpand(p, ei->string,
-                                            strlen(ei->string), false);
-                       doexpand(es, p, newbuf, strlen(newbuf));
-                       dostrfree(newbuf);
-                       m->inuse = false;
+                       es->curmacro = m;
+                       expand_domacro(es, p);
                } else {
                        es->curmacro = m;
                        es->state = ES_WANTLPAREN;
@@ -923,7 +1010,8 @@ expand_got_word(struct expstate *es, str
 
 static
 void
-expand_got_lparen(struct expstate *es, struct place *p, char *buf, size_t len)
+expand_got_lparen(struct expstate *es, struct place *p,
+                 const char *buf, size_t len)
 {
        switch (es->state) {
            case ES_NORMAL:
@@ -946,7 +1034,8 @@ expand_got_lparen(struct expstate *es, s
 
 static
 void
-expand_got_rparen(struct expstate *es, struct place *p, char *buf, size_t len)
+expand_got_rparen(struct expstate *es, struct place *p,
+                 const char *buf, size_t len)
 {
        switch (es->state) {
            case ES_NORMAL:
@@ -981,7 +1070,8 @@ expand_got_rparen(struct expstate *es, s
 
 static
 void
-expand_got_comma(struct expstate *es, struct place *p, char *buf, size_t len)
+expand_got_comma(struct expstate *es, struct place *p,
+                const char *buf, size_t len)
 {
        switch (es->state) {
            case ES_NORMAL:
@@ -1009,7 +1099,8 @@ expand_got_comma(struct expstate *es, st
 
 static
 void
-expand_got_other(struct expstate *es, struct place *p, char *buf, size_t len)
+expand_got_other(struct expstate *es, struct place *p,
+                const char *buf, size_t len)
 {
        switch (es->state) {
            case ES_NORMAL:
@@ -1061,7 +1152,7 @@ expand_got_eof(struct expstate *es, stru
 
 static
 void
-doexpand(struct expstate *es, struct place *p, char *buf, size_t len)
+doexpand(struct expstate *es, struct place *p, const char *buf, size_t len)
 {
        char *s;
        size_t x;
@@ -1150,7 +1241,7 @@ doexpand(struct expstate *es, struct pla
 }
 
 char *
-macroexpand(struct place *p, char *buf, size_t len, bool honordefined)
+macroexpand(struct place *p, const char *buf, size_t len, bool honordefined)
 {
        struct expstate es;
        char *ret;
@@ -1172,10 +1263,30 @@ macroexpand(struct place *p, char *buf, 
 }
 
 void
-macro_sendline(struct place *p, char *buf, size_t len)
+macro_sendline(struct place *p, const char *buf, size_t len)
 {
        doexpand(&mainstate, p, buf, len);
-       output(p, "\n", 1);
+       switch (mainstate.state) {
+           case ES_NORMAL:
+               /*
+                * If we were sent a blank line, don't emit a newline
+                * for it. This matches the prior behavior of tradcpp.
+                */
+               if (len > 0) {
+                       output(p, "\n", 1);
+               }
+               break;
+           case ES_WANTLPAREN:
+           case ES_NOARG:
+           case ES_HAVEARG:
+               /*
+                * Apparently to match gcc's -traditional behavior we
+                * need to emit a space for each newline that appears
+                * while processing macro args.
+                */
+               expand_got_ws(&mainstate, p, " ", 1);
+               break;
+       }
 }
 
 void
Index: macro.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/macro.h,v
retrieving revision 1.1
diff -u -p -r1.1 macro.h
--- macro.h     30 Jul 2014 16:33:11 -0000      1.1
+++ macro.h     31 Aug 2018 02:12:53 -0000
@@ -27,8 +27,8 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
 #include <stddef.h>
+#include "bool.h"
 
 struct place;
 
@@ -40,10 +40,12 @@ void macro_define_plain(struct place *, 
 void macro_define_params(struct place *, const char *macro,
                         struct place *, const char *params,
                         struct place *, const char *expansion);
+void macro_define_magic(struct place *, const char *macro);
 void macro_undef(const char *macro);
 bool macro_isdefined(const char *macro);
 
-char *macroexpand(struct place *, char *buf, size_t len, bool honordefined);
+char *macroexpand(struct place *, const char *buf, size_t len,
+                 bool honordefined);
 
-void macro_sendline(struct place *, char *buf, size_t len);
+void macro_sendline(struct place *, const char *buf, size_t len);
 void macro_sendeof(struct place *);
Index: main.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/main.c,v
retrieving revision 1.3
diff -u -p -r1.3 main.c
--- main.c      9 Oct 2015 12:20:18 -0000       1.3
+++ main.c      31 Aug 2018 02:34:15 -0000
@@ -27,7 +27,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
@@ -35,6 +34,7 @@
 #include <string.h>
 #include <errno.h>
 
+#include "bool.h"
 #include "version.h"
 #include "config.h"
 #include "utils.h"
@@ -56,6 +56,7 @@ struct mode mode = {
 
        .do_output = true,
        .output_linenumbers = true,
+       .output_cheaplinenumbers = false,
        .output_retain_comments = false,
        .output_file = NULL,
 
@@ -167,7 +168,7 @@ void
 commandline_undef(const struct place *p, char *str)
 {
        if (*str == '\0') {
-               complain(NULL, "-D: macro name expected");
+               complain(NULL, "-U: macro name expected");
                die();
        }
        commandline_macro_add(p, str, p, NULL);
@@ -196,6 +197,16 @@ apply_commandline_macros(void)
 
 static
 void
+apply_magic_macro(unsigned num, const char *name)
+{
+       struct place p;
+
+       place_setbuiltin(&p, num);
+       macro_define_magic(&p, name);
+}
+
+static
+void
 apply_builtin_macro(unsigned num, const char *name, const char *val)
 {
        struct place p;
@@ -210,6 +221,9 @@ apply_builtin_macros(void)
 {
        unsigned n = 1;
 
+       apply_magic_macro(n++, "__FILE__");
+       apply_magic_macro(n++, "__LINE__");
+
 #ifdef CONFIG_OS
        apply_builtin_macro(n++, CONFIG_OS, "1");
 #endif
@@ -782,6 +796,7 @@ static const struct flag_option flag_opt
        { "fdollars-in-identifiers",    &mode.input_allow_dollars,     true },
        { "fno-dollars-in-identifiers", &mode.input_allow_dollars,     false },
        { "nostdinc",                   &mode.do_stdinc,               false },
+       { "p",                          &mode.output_cheaplinenumbers, true },
        { "undef",                      &mode.do_stddef,               false },
 };
 static const unsigned num_flag_options = HOWMANY(flag_options);
@@ -815,6 +830,7 @@ static const struct arg_option arg_optio
        { "MF",          commandline_setdependoutput },
        { "MQ",          commandline_setdependtarget_quoted },
        { "MT",          commandline_setdependtarget },
+       { "debuglog",    debuglog_open },
        { "idirafter",   commandline_addincpath_late },
        { "imacros",     commandline_addfile_nooutput },
        { "include",     commandline_addfile_output },
@@ -935,7 +951,7 @@ check_arg_option(const char *opt, const 
        return false;
 }
 
-DEAD static
+DEAD PF(2, 3) static
 void
 usage(const char *progname, const char *fmt, ...)
 {
@@ -947,7 +963,7 @@ usage(const char *progname, const char *
        va_end(ap);
        fprintf(stderr, "\n");
 
-       fprintf(stderr, "Usage: %s [options] [infile [outfile]]\n", progname);
+       fprintf(stderr, "usage: %s [options] [infile [outfile]]\n", progname);
        fprintf(stderr, "Common options:\n");
        fprintf(stderr, "   -C               Retain comments\n");
        fprintf(stderr, "   -Dmacro[=def]    Predefine macro\n");
@@ -1000,6 +1016,7 @@ cleanup(void)
        commandline_files_cleanup();
        commandline_macros_cleanup();
        incpath_cleanup();
+       debuglog_close();
 
        num = stringarray_num(&freestrings);
        for (i=0; i<num; i++) {
@@ -1046,7 +1063,7 @@ main(int argc, char *argv[])
        init();
 
        for (i=1; i<argc; i++) {
-               if ((argv[i][0] != '-') || !strcmp(argv[i], "-")) {
+               if (argv[i][0] != '-' || argv[i][1] == 0) {
                        break;
                }
                place_setcommandline(&cmdplace, i, 1);
@@ -1071,9 +1088,15 @@ main(int argc, char *argv[])
        }
        if (i < argc) {
                inputfile = argv[i++];
+               if (!strcmp(inputfile, "-")) {
+                       inputfile = NULL;
+               }
        }
        if (i < argc) {
                outputfile = argv[i++];
+               if (!strcmp(outputfile, "-")) {
+                       outputfile = NULL;
+               }
        }
        if (i < argc) {
                usage(progname, "Extra non-option argument %s", argv[i]);
Index: mode.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/mode.h,v
retrieving revision 1.1
diff -u -p -r1.1 mode.h
--- mode.h      30 Jul 2014 16:33:11 -0000      1.1
+++ mode.h      31 Aug 2018 02:12:53 -0000
@@ -27,7 +27,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
+#include "bool.h"
 
 struct mode {
        bool werror;
@@ -37,6 +37,7 @@ struct mode {
        bool do_stddef;
        bool do_output;
        bool output_linenumbers;
+       bool output_cheaplinenumbers;
        bool output_retain_comments;
        const char *output_file;
        bool do_depend;
Index: output.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/output.c,v
retrieving revision 1.2
diff -u -p -r1.2 output.c
--- output.c    8 Aug 2014 12:40:26 -0000       1.2
+++ output.c    31 Aug 2018 02:34:55 -0000
@@ -27,6 +27,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -47,7 +48,7 @@ static
 void
 output_open(void)
 {
-       if ((mode.output_file == NULL) || !strcmp(mode.output_file, "-")) {
+       if (mode.output_file == NULL) {
                outputfd = STDOUT_FILENO;
        } else {
                outputfd = open(mode.output_file, O_WRONLY|O_CREAT|O_TRUNC,
@@ -172,6 +173,15 @@ output(const struct place *p, const char
                linebuf = dorealloc(linebuf, oldmax, linebufmax);
        }
        if (linebufpos == 0) {
+               if (!place_samefile(&linebufplace, p)) {
+                       if (mode.output_cheaplinenumbers) {
+                               char str[256];
+
+                               snprintf(str, sizeof(str), "# %u \"%s\"\n",
+                                        p->line, place_getname(p));
+                               dowrite(str, strlen(str));
+                       }
+               }
                linebufplace = *p;
        }
        memcpy(linebuf + linebufpos, buf, len);
Index: place.c
===================================================================
RCS file: /cvs/src/libexec/tradcpp/place.c,v
retrieving revision 1.1
diff -u -p -r1.1 place.c
--- place.c     30 Jul 2014 16:33:11 -0000      1.1
+++ place.c     31 Aug 2018 02:12:53 -0000
@@ -32,6 +32,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 
 #include "utils.h"
 #include "array.h"
@@ -52,8 +53,10 @@ static bool overall_failure;
 
 static const char *myprogname;
 
+static FILE *debuglogfile;
+
 ////////////////////////////////////////////////////////////
-// seenfiles
+// placefiles
 
 static
 struct placefile *
@@ -101,6 +104,42 @@ place_getparsedir(const struct place *pl
        return place->file->dir;
 }
 
+static
+struct placefile *
+placefile_find(const struct place *incfrom, const char *name)
+{
+       unsigned i, num;
+       struct placefile *pf;
+
+       num = placefilearray_num(&placefiles);
+       for (i=0; i<num; i++) {
+               pf = placefilearray_get(&placefiles, i);
+               if (place_eq(incfrom, &pf->includedfrom) &&
+                   !strcmp(name, pf->name)) {
+                       return pf;
+               }
+       }
+       return NULL;
+}
+
+void
+place_changefile(struct place *p, const char *name)
+{
+       struct placefile *pf;
+
+       assert(p->type == P_FILE);
+       if (!strcmp(name, p->file->name)) {
+               return;
+       }
+       pf = placefile_find(&p->file->includedfrom, name);
+       if (pf == NULL) {
+               pf = placefile_create(&p->file->includedfrom, name,
+                                     p->file->fromsystemdir);
+               placefilearray_add(&placefiles, pf, NULL);
+       }
+       p->file = pf;
+}
+
 const struct placefile *
 place_addfile(const struct place *place, const char *file, bool issystem)
 {
@@ -154,7 +193,6 @@ place_setfilestart(struct place *p, cons
        p->column = 1;
 }
 
-static
 const char *
 place_getname(const struct place *p)
 {
@@ -168,6 +206,30 @@ place_getname(const struct place *p)
        return NULL;
 }
 
+bool
+place_samefile(const struct place *a, const struct place *b)
+{
+       if (a->type != b->type) {
+               return false;
+       }
+       if (a->file != b->file) {
+               return false;
+       }
+       return true;
+}
+
+bool
+place_eq(const struct place *a, const struct place *b)
+{
+       if (!place_samefile(a, b)) {
+               return false;
+       }
+       if (a->line != b->line || a->column != b->column) {
+               return false;
+       }
+       return true;
+}
+
 static
 void
 place_printfrom(const struct place *p)
@@ -222,6 +284,70 @@ bool
 complain_failed(void)
 {
        return overall_failure;
+}
+
+////////////////////////////////////////////////////////////
+// debug logging
+
+void
+debuglog_open(const struct place *p, /*const*/ char *file)
+{
+       assert(debuglogfile == NULL);
+       debuglogfile = fopen(file, "w");
+       if (debuglogfile == NULL) {
+               complain(p, "%s: %s", file, strerror(errno));
+               die();
+       }
+}
+
+void
+debuglog_close(void)
+{
+       if (debuglogfile != NULL) {
+               fclose(debuglogfile);
+               debuglogfile = NULL;
+       }
+}
+
+PF(2, 3) void
+debuglog(const struct place *p, const char *fmt, ...)
+{
+       va_list ap;
+
+       if (debuglogfile == NULL) {
+               return;
+       }
+
+       fprintf(debuglogfile, "%s:%u: ", place_getname(p), p->line);
+       va_start(ap, fmt);
+       vfprintf(debuglogfile, fmt, ap);
+       va_end(ap);
+       fprintf(debuglogfile, "\n");
+       fflush(debuglogfile);
+}
+
+PF(3, 4) void
+debuglog2(const struct place *p, const struct place *p2, const char *fmt, ...)
+{
+       va_list ap;
+
+       if (debuglogfile == NULL) {
+               return;
+       }
+
+       fprintf(debuglogfile, "%s:%u: ", place_getname(p), p->line);
+       if (place_samefile(p, p2)) {
+               fprintf(debuglogfile, "(block began at line %u) ",
+                       p2->line);
+       } else {
+               fprintf(debuglogfile, "(block began at %s:%u)",
+                       place_getname(p2), p2->line);
+       }
+       va_start(ap, fmt);
+       vfprintf(debuglogfile, fmt, ap);
+       va_end(ap);
+       fprintf(debuglogfile, "\n");
+       fflush(debuglogfile);
 }
 
 ////////////////////////////////////////////////////////////
Index: place.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/place.h,v
retrieving revision 1.1
diff -u -p -r1.1 place.h
--- place.h     30 Jul 2014 16:33:11 -0000      1.1
+++ place.h     31 Aug 2018 02:12:53 -0000
@@ -27,7 +27,10 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
+#ifndef PLACE_H
+#define PLACE_H
+
+#include "bool.h"
 
 enum places {
        P_NOWHERE,
@@ -50,7 +53,14 @@ void place_setbuiltin(struct place *p, u
 void place_setcommandline(struct place *p, unsigned word, unsigned column);
 void place_setfilestart(struct place *p, const struct placefile *pf);
 
+const char *place_getname(const struct place *);
 const char *place_getparsedir(const struct place *incplace);
+bool place_eq(const struct place *, const struct place *);
+bool place_samefile(const struct place *, const struct place *);
+
+void place_changefile(struct place *p, const char *name);
 
 const struct placefile *place_addfile(const struct place *incplace,
                                      const char *name, bool fromsystemdir);
+
+#endif /* PLACE_H */
Index: tradcpp.1
===================================================================
RCS file: /cvs/src/libexec/tradcpp/tradcpp.1,v
retrieving revision 1.4
diff -u -p -r1.4 tradcpp.1
--- tradcpp.1   28 Dec 2016 22:47:11 -0000      1.4
+++ tradcpp.1   31 Aug 2018 02:17:04 -0000
@@ -261,6 +261,14 @@ but adds the result as if it were specif
 .El
 .Ss Diagnostic Options
 .Bl -tag -width bubblebabble
+.It Fl debuglog Ar file
+Write a trace of actions and operations to
+.Ar file
+as the input is processed.
+Meant for debugging problems in complex substitution schemes fed to
+.Nm ,
+such as those used by
+.Sy imake .
 .It Fl dD
 Dump all macro definitions, except for the predefined macros, after
 the normal preprocessing output.
Index: union.h
===================================================================
RCS file: union.h
diff -N union.h
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ union.h     31 Aug 2018 02:29:59 -0000
@@ -0,0 +1,36 @@
+/*-
+ * Copyright (c) 2015 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by David A. Holland.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if defined(__clang__) || defined(__GNUC__) || __STDC__ > 201101
+#define UN
+#undef NEED_UNION_ACCESSORS
+#else
+#define UN un
+#define NEED_UNION_ACCESSORS
+#endif
Index: utils.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/utils.h,v
retrieving revision 1.1
diff -u -p -r1.1 utils.h
--- utils.h     30 Jul 2014 16:33:11 -0000      1.1
+++ utils.h     31 Aug 2018 02:13:02 -0000
@@ -27,8 +27,8 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <stdbool.h>
 #include <stddef.h>
+#include "bool.h"
 
 struct place;
 
@@ -63,9 +63,15 @@ bool is_identifier(const char *str);
 
 /* in place.c */
 void complain_init(const char *progname);
-void complain(const struct place *, const char *fmt, ...) PF(2, 3);
+PF(2, 3) void complain(const struct place *, const char *fmt, ...);
 void complain_fail(void);
 bool complain_failed(void);
+
+void debuglog_open(const struct place *p, /*const*/ char *file);
+void debuglog_close(void);
+PF(2, 3) void debuglog(const struct place *p, const char *fmt, ...);
+PF(3, 4) void debuglog2(const struct place *p, const struct place *p2,
+                       const char *fmt, ...);
 
 /* in main.c */
 void freestringlater(char *s);
Index: version.h
===================================================================
RCS file: /cvs/src/libexec/tradcpp/version.h,v
retrieving revision 1.1
diff -u -p -r1.1 version.h
--- version.h   30 Jul 2014 16:33:11 -0000      1.1
+++ version.h   31 Aug 2018 02:13:02 -0000
@@ -28,6 +28,6 @@
  */
 
 #define VERSION_MAJOR  "0"
-#define VERSION_MINOR  "4"
-#define VERSION_STRING "0.4"
-#define VERSION_LONG   "NetBSD tradcpp 0.4"
+#define VERSION_MINOR  "5"
+#define VERSION_STRING "0.5.2"
+#define VERSION_LONG   "NetBSD tradcpp 0.5.2"

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