[tlbuild] [PATCH] Fix -Wimplicit-function-declaration

[Sam James]

Add <stdlib.h> includes for exit(). Clang 16 makes -Wimplicit-function-declaration an error by default.

Signed-off-by: Sam James <sam at gentoo.org>
---
 texk/dvisvgm/configure.ac  | 1 +
 texk/kpathsea/configure.ac | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/texk/dvisvgm/configure.ac b/texk/dvisvgm/configure.ac
index 5dfc7656d..0ed1a7991 100644
--- a/texk/dvisvgm/configure.ac
+++ b/texk/dvisvgm/configure.ac
@@ -94,6 +94,7 @@ else
 	# query Ghostscript version
 	AC_MSG_CHECKING([Ghostscript version])
 	AC_RUN_IFELSE([AC_LANG_SOURCE([#include <stdio.h>
+		#include <stdlib.h>
 		#include <ghostscript/iapi.h>
 		int main () {
 			gsapi_revision_t r;
diff --git a/texk/kpathsea/configure.ac b/texk/kpathsea/configure.ac
index 0851e82f0..5dde0e6bd 100644
--- a/texk/kpathsea/configure.ac
+++ b/texk/kpathsea/configure.ac
@@ -45,7 +45,8 @@ if test "x$ac_cv_func_getcwd" = xyes; then
 # We only need to run this if we have getcwd.
 AC_CACHE_CHECK([whether getcwd uses fork or vfork],
                [kb_cv_func_getcwd_forks],
-               [AC_RUN_IFELSE([AC_LANG_PROGRAM([[int fork() { exit(1); }
+               [AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
+                                                 int fork() { exit(1); }
                                                  int vfork() { exit(1); }
                                                  extern char *getcwd();
                                                  char path[100];]],
-- 
2.38.1