headers: use configure.h as 1st. header

Ensure configure.h is always 1st. included header.
Maybe we could eventually introduce gcc -include option, but for now
this better uses dependency tracking.

Also move _REENTRANT and _GNU_SOURCE into configure.h so it
doesn't need to be present in various source files.
This ensures consistent compilation of headers like stdio.h since
it may produce different declaration.

1 files changed, 9 insertions, 0 deletions

diff --git a/configure b/configure
index 66acdb2ee..53f5023d9 100755
--- a/configure
+++ b/configure
@@ -6623,6 +6623,15 @@ fi
 
 
 
+
+
+$as_echo "#define _GNU_SOURCE 1" >>confdefs.h
+
+
+$as_echo "#define _REENTRANT 1" >>confdefs.h
+
+
+
 ################################################################################
 for ac_func in ftruncate gethostname getpagesize gettimeofday localtime_r \
   memchr memset mkdir mkfifo munmap nl_langinfo realpath rmdir setenv \