https://gcc.gnu.org/g:038d64f62271ddc62aa35d0a5dfd3843fdb9e6d7
commit r15-1803-g038d64f62271ddc62aa35d0a5dfd3843fdb9e6d7
Author: Lewis Hyatt <lhy...@gmail.com>
Date: Sat Jun 15 21:09:01 2024 -0400
preprocessor: Create the parser before handling command-line includes
[PR115312]
Since r14-2893, we create a parser object in preprocess-only mode for the
purpose of parsing #pragma while preprocessing. The parser object was
formerly created after calling c_finish_options(), which leads to problems
on platforms that don't use stdc-predef.h (such as MinGW, as reported in
the PR). On such platforms, the call to c_finish_options() will process
the first command-line-specified include file. If that includes a PCH, then
c-ppoutput.cc will encounter a state it did not anticipate. Fix it by
creating the parser prior to calling c_finish_options().
gcc/c-family/ChangeLog:
PR pch/115312
* c-opts.cc (c_common_init): Call c_init_preprocess() before
c_finish_options() so that a parser is available to process any
includes specified on the command line.
gcc/testsuite/ChangeLog:
PR pch/115312
* g++.dg/pch/pr115312.C: New test.
* g++.dg/pch/pr115312.Hs: New test.
Diff:
---
gcc/c-family/c-opts.cc | 2 +-
gcc/testsuite/g++.dg/pch/pr115312.C | 2 ++
gcc/testsuite/g++.dg/pch/pr115312.Hs | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/gcc/c-family/c-opts.cc b/gcc/c-family/c-opts.cc
index 33114f13c8d..b7789b707e6 100644
--- a/gcc/c-family/c-opts.cc
+++ b/gcc/c-family/c-opts.cc
@@ -1296,8 +1296,8 @@ c_common_init (void)
if (flag_preprocess_only)
{
- c_finish_options ();
c_init_preprocess ();
+ c_finish_options ();
preprocess_file (parse_in);
return false;
}
diff --git a/gcc/testsuite/g++.dg/pch/pr115312.C
b/gcc/testsuite/g++.dg/pch/pr115312.C
new file mode 100644
index 00000000000..9074ad4a5ad
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pch/pr115312.C
@@ -0,0 +1,2 @@
+/* { dg-additional-options "-include pr115312.H -save-temps" } */
+#error "suppress PCH assembly comparison, which does not work with
-save-temps" /* { dg-error "." } */
diff --git a/gcc/testsuite/g++.dg/pch/pr115312.Hs
b/gcc/testsuite/g++.dg/pch/pr115312.Hs
new file mode 100644
index 00000000000..6e7c6bcac2f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pch/pr115312.Hs
@@ -0,0 +1 @@
+// This space intentionally left blank.
