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Fix implicit function declarations in configure.ac (XOpenDisplay, malloc)
Backported from master branch
https://bugs.gentoo.org/898304
commit 6c1413d5ef0d1fea639b0d8c83a0c0065d99359b
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Dec 23 18:49:25 2022 +0100
configure: Remove obsolete check for -b i486-linuxaout
commit 121a9ff9f6fc69066ce30c2dbe6cbfbfdca6aeaa
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Dec 23 18:51:08 2022 +0100
Fix alternate stack test in configure
--- emacs-26.3/configure.ac
+++ emacs-26.3/configure.ac
@@ -2421,39 +2421,6 @@
export LD_RUN_PATH
fi
- if test "${opsys}" = "gnu-linux"; then
- AC_CACHE_CHECK([whether X on GNU/Linux needs -b to link], [emacs_cv_b_link],
- [AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
- [[XOpenDisplay ("foo");]])],
- [xgnu_linux_first_failure=no],
- [xgnu_linux_first_failure=yes])
- if test "${xgnu_linux_first_failure}" = "yes"; then
- OLD_CPPFLAGS="$CPPFLAGS"
- OLD_LIBS="$LIBS"
- CPPFLAGS="$CPPFLAGS -b i486-linuxaout"
- LIBS="$LIBS -b i486-linuxaout"
- AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
- [[XOpenDisplay ("foo");]])],
- [xgnu_linux_second_failure=no],
- [xgnu_linux_second_failure=yes])
- if test "${xgnu_linux_second_failure}" = "yes"; then
- # If we get the same failure with -b, there is no use adding -b.
- # So leave it out. This plays safe.
- emacs_cv_b_link=no
- else
- emacs_cv_b_link=yes
- fi
- CPPFLAGS=$OLD_CPPFLAGS
- LIBS=$OLD_LIBS
- else
- emacs_cv_b_link=no
- fi])
- if test "x$emacs_cv_b_link" = xyes ; then
- LD_SWITCH_X_SITE="$LD_SWITCH_X_SITE -b i486-linuxaout"
- C_SWITCH_X_SITE="$C_SWITCH_X_SITE -b i486-linuxaout"
- fi
- fi
-
# Reportedly, some broken Solaris systems have XKBlib.h but are missing
# header files included from there.
AC_CACHE_CHECK([for Xkb], [emacs_cv_xkb],
@@ -4170,6 +4137,7 @@
[emacs_cv_alternate_stack],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <signal.h>
+ #include <stdlib.h>
]],
[[stack_t ss;
struct sigaction sa;
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