* Thomas Dickey: >> diff --git a/configure b/configure >> index 97f6d1d5646d05c5..6db52b514b3b9a3c 100755 >> --- a/configure >> +++ b/configure >> @@ -31122,6 +31122,7 @@ else >> #line 31122 "configure" >> #include "confdefs.h" >> >> +#include <stdio.h> >> #if HAVE_TERMIO_H >> #include <termio.h> >> #endif >> @@ -31629,6 +31630,9 @@ else >> #line 31629 "configure" >> #include "confdefs.h" >> /* Thanks to Mike Rendell for this test. */ >> +#if HAVE_UNISTD_H >> +# include <unistd.h> >> +#endif > > "middle chunk" is referring to this, I suppose. > > AC_INCLUDES_DEFAULT includes a lot of headers, not just this one. > > what problem does that #include solve?
Our configure says this at the top: “Generated by Autoconf 2.52.20210509.” I don't think it uses AC_INCLUDES_DEFAULT yet, it seems: | configure: failed program was: | #line 31629 "configure" | #include "confdefs.h" | /* Thanks to Mike Rendell for this test. */ | #include <sys/types.h> | #define NGID 256 | #undef MAX | #define MAX(x, y) ((x) > (y) ? (x) : (y)) | | int | main (void) | { | gid_t gidset[NGID]; | int i, n; | union { gid_t gval; long lval; } val; | | val.lval = -1; | for (i = 0; i < NGID; i++) | gidset[i] = val.gval; | n = getgroups (sizeof (gidset) / MAX (sizeof (int), sizeof (gid_t)) - 1, | gidset); | /* Exit non-zero if getgroups seems to require an array of ints. This | happens when gid_t is short but getgroups modifies an array of ints. */ | return ((n > 0 && gidset[n] != val.gval) ? 1 : 0); | } Full build log is here: <https://gitlab.com/fweimer-rh/fedora-modernc-logs/-/blob/fbf287fbe1e977fad4ef23390174e6f6d584f5c7/logs/l/lynx.log> >> #include <sys/types.h> >> #define NGID 256 >> #undef MAX >> @@ -47492,6 +47496,7 @@ else >> #line 47492 "configure" >> #include "confdefs.h" >> >> +#include <stdio.h> > > ...shouldn't be needed, since both curses.h and slang.h include stdio.h > (LYCurses.h includes one or the other, as well as HTUtils.h) Okay, my mistake, but the first putchar change *is* needed: | configure: In function 'main': | configure:31133:1: error: implicit declaration of function 'putchar' | 31133 | { | | ^ | configure:31143: $? = 1 | configure: failed program was: | #line 31122 "configure" | #include "confdefs.h" | | #if HAVE_TERMIO_H | #include <termio.h> | #endif | #if HAVE_TERMIOS_H | #include <termios.h> | #endif | int | main (void) | { | putchar (0x0a) | ; | return 0; | } Thanks, Florian