Add more header files to avoid errors due to implicitly declared functions.

src/configure.in

@@ -5041,6 +5041,7 @@ MY_CHECK_FUNCTION(infnan,
 [
 #include <errno.h>
 #include <math.h>
+#include <stdlib.h>
 ], [
   double pinf = infnan(ERANGE);
   double ninf = infnan(-ERANGE);
@@ -5051,6 +5052,7 @@ MY_CHECK_FUNCTION(infnan,
 MY_CHECK_FUNCTION(_isnan,
 [
 #include <float.h>
+#include <stdlib.h>
 ], [
   exit(_isnan(0.0));
 ])
@@ -6523,6 +6525,11 @@ AC_CACHE_VAL(pike_cv_sys_signal_oneshot,
 #ifdef HAVE_POLL_H
 #include <poll.h>
 #endif
+#include <string.h>
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 VOLATILE sig_atomic_t sigrun[2]= { 0, 0 };
 RETSIGTYPE func(int sig)
 {
@@ -6734,6 +6741,7 @@ AC_CACHE_VAL(pike_cv_lc___declspec,
   AC_TRY_RUN([
 #include <stdlib.h>
 #include <stdarg.h>
+#include <stdio.h>
 __declspec(noreturn) void fatal(char *foo,...);
 
 __declspec(noreturn) void fatal(char *foo,...)
@@ -6752,6 +6760,7 @@ int main() {  exit(0); }
     AC_TRY_LINK([
 #include <stdlib.h>
 #include <stdarg.h>
+#include <stdio.h>
 __declspec(noreturn) void fatal(char *foo,...);
 
 __declspec(noreturn) void fatal(char *foo,...)

src/modules/Mysql/configure.in

@@ -448,6 +448,7 @@ fi
 #endif
 #endif
 #include <stdio.h>
+#include <stdlib.h>
 int main(int argc, char *argv[])
 {
 #ifdef MYSQL_VERSION_ID

src/modules/Wnotify/configure.in

@@ -15,6 +15,7 @@ MY_CHECK_FUNCTION(FindFirstChangeNotification,
 #ifdef HAVE_FILEAPI_H
 #include <FileAPI.h>
 #endif
+#include <stdlib.h>
 ], [
   FindFirstChangeNotification("", 0, 0);
   exit(0);

src/modules/_Image_JPEG/configure.in

@@ -19,6 +19,7 @@ if test x$with_jpeglib = xyes ; then
       AC_CACHE_VAL(pike_cv_jpeg_jerr_bad_crop_spec, [
         AC_TRY_COMPILE([
 #include <jerror.h>
+#include <stdlib.h>
 int main(int argc, char **argv)
 {
   int err = JERR_BAD_CROP_SPEC;

src/modules/_Image_TTF/configure.in

@@ -64,6 +64,7 @@ if test x$with_ttflib = xyes ; then
       AC_CACHE_VAL(pike_cv_lib_ttf_works, [
         AC_TRY_RUN([
 #include <stdio.h>
+#include <stdlib.h>
 #if defined(HAVE_FREETYPE_FREETYPE_H) && defined(HAVE_FREETYPE_FTXKERN_H)
 
 #include <freetype/freetype.h>

src/modules/_Image_XFace/configure.in

@@ -87,6 +87,7 @@ dnl    undefine(PIKE_PREFIX_NAME)
       LIBS="${LIBS-} -l$1"
       AC_TRY_RUN([
 #include <stdio.h>
+#include <stdlib.h>
 
 /* Kludge for some compilers only defining __STDC__ in strict mode. */
 #if !defined(__STDC__) && defined(HAVE_ANSI_CONCAT) && defined(PIKE_MPN_PREFIX)