configure: include stddef.h for NULL

This fixes an observed failure to detect madvise() on Linux.

To avoid similar issues, all other tests that use NULL but don't already
have stddef.h (or another header that is defined to provide NULL,
such as stdio.h, unistd.h, or time.h) are also fixed.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

diff --git a/configure b/configure
index 9e65de05af115d8ae8ba55e29fbf34aa5f3f1a42..4f570548ae09c53923aaea1ebab1e30d43c2fcf9 100755 (executable)
--- a/configure
+++ b/configure
@@ -1329,6 +1329,7 @@ if test "$vnc_png" != "no" ; then
 cat > $TMPC <<EOF
 //#include <stdio.h>
 #include <png.h>
+#include <stddef.h>
 int main(void) {
     png_structp png_ptr;
     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
@@ -1513,6 +1514,7 @@ if test "$brlapi" != "no" ; then
   brlapi_libs="-lbrlapi"
   cat > $TMPC << EOF
 #include <brlapi.h>
+#include <stddef.h>
 int main( void ) { return brlapi__openConnection (NULL, NULL, NULL); }
 EOF
   if compile_prog "" "$brlapi_libs" ; then
@@ -1747,6 +1749,7 @@ if test "$linux_aio" != "no" ; then
   cat > $TMPC <<EOF
 #include <libaio.h>
 #include <sys/eventfd.h>
+#include <stddef.h>
 int main(void) { io_setup(0, NULL); io_set_eventfd(NULL, 0); eventfd(0, 0); return 0; }
 EOF
   if compile_prog "" "-laio" ; then
@@ -2127,6 +2130,7 @@ madvise=no
 cat > $TMPC << EOF
 #include <sys/types.h>
 #include <sys/mman.h>
+#include <stddef.h>
 int main(void) { return madvise(NULL, 0, MADV_DONTNEED); }
 EOF
 if compile_prog "" "" ; then
@@ -2139,6 +2143,7 @@ fi
 posix_madvise=no
 cat > $TMPC << EOF
 #include <sys/mman.h>
+#include <stddef.h>
 int main(void) { return posix_madvise(NULL, 0, POSIX_MADV_DONTNEED); }
 EOF
 if compile_prog "" "" ; then