https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123037
Bug ID: 123037
Summary: Ada cross to i686-w64-mingw32 fails to build
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
CC: dkm at gcc dot gnu.org
Target Milestone: ---
```
/var/tmp/portage/cross-i686-w64-mingw32/gcc-15.2.1_p20251122/work/build/./gcc/xgcc
-B/var/tmp/portage/cross-i686-w64-mingw32/gcc-15.2.1_p20251122/work/build/./gcc/
-L/usr/i686-w64-mingw32/lib -L/usr/mingw/lib -isystem
/usr/i686-w64-mingw32/include -isystem /usr/mingw/include
-B/usr/i686-w64-mingw32/bin/ -B/usr/i686-w64-mingw32/lib/ -isystem
/usr/i686-w64-mingw32/include -isystem /usr/i686-w64-mingw32/sys-include -c
-DCROSS_DIRECTORY_STRUCTURE -DIN_GCC -W -Wall -g -O2 -g -O2 -fexceptions
-DIN_RTS -DHAVE_GETIPINFO -iquote . -iquote .. -iquote ../.. -iquote
/var/tmp/portage/cross-i686-w64-mingw32/gcc-15.2.1_p20251122/work/gcc-15-20251122/gcc/ada
-iquote
/var/tmp/portage/cross-i686-w64-mingw32/gcc-15.2.1_p20251122/work/gcc-15-20251122/gcc
-I/var/tmp/portage/cross-i686-w64-mingw32/gcc-15.2.1_p20251122/work/gcc-15-20251122/include
-I./../.. rtinit.c -o rtinit.o
rtinit.c: In function ‘__gnat_get_argw’:
rtinit.c:45:20: error: implicit declaration of function ‘malloc’
[-Wimplicit-function-declaration]
45 | #define xmalloc(S) malloc (S)
| ^~~~~~
rtinit.c:251:15: note: in expansion of macro ‘xmalloc’
251 | (WCHAR *) xmalloc ((wcslen (command_line) + 1) * sizeof (WCHAR));
| ^~~~~~~
rtinit.c:75:1: note: include ‘<stdlib.h>’ or provide a declaration of ‘malloc’
74 | #include "mingw32.h"
+++ |+#include <stdlib.h>
75 | #include <windows.h>
```
configure line:
```
/var/tmp/portage/cross-i686-w64-mingw32/gcc-15.2.1_p20251122/work/gcc-15-20251122/configure
--host=x86_64-pc-linux-gnu --target=i686-w64-mingw32
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/i686-w64-mingw32/gcc-bin/15
--includedir=/usr/lib/gcc/i686-w64-mingw32/15/include
--datadir=/usr/share/gcc-data/i686-w64-mingw32/15
--mandir=/usr/share/gcc-data/i686-w64-mingw32/15/man
--infodir=/usr/share/gcc-data/i686-w64-mingw32/15/info
--with-gxx-include-dir=/usr/lib/gcc/i686-w64-mingw32/15/include/g++-v15
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/i686-w64-mingw32/15/python
--enable-languages=c,c++,fortran,ada --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--disable-libunwind-exceptions --enable-checking=release
--with-bugurl=https://bugs.gentoo.org/ '--with-pkgversion=Gentoo
15.2.1_p20251122 p3' --with-gcc-major-version-only --enable-libstdcxx-time
--enable-lto --disable-libstdcxx-pch --enable-poison-system-directories
--with-sysroot=/usr/i686-w64-mingw32 --disable-gcov --disable-bootstrap
--disable-multilib --disable-fixed-point --with-arch=i686 --enable-targets=all
--enable-libgomp --enable-libada --disable-cet --disable-systemtap
--disable-valgrind-annotations --disable-vtable-verify --disable-libvtv
--without-zstd --without-isl --disable-libsanitizer --disable-default-pie
--enable-host-pie --disable-host-bind-now --enable-default-ssp
--enable-fixincludes --with-gxx-libcxx-include-dir=/usr/include/c++/v1
```
Adding <stdlib.h> works for me. I don't think it needs a guard from looking
around the area, I'll send the patch.
