X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/588b276355e02c1d278d208e152ea450e603960c..daf0351f962a969c28bea01ed6b66453cccfe556:/configure.ac

diff --git a/configure.ac b/configure.ac
index 7346b9c..3c13dac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -417,7 +417,7 @@ if test $ac_cv_type_long_long = yes; then
     AC_DEFINE([DECLARES_ATOLL],[1],[define if <stdlib.h> declares atoll])
   fi
 fi
-AC_CHECK_FUNCS([ioctl nl_langinfo strsignal],[:],[
+AC_CHECK_FUNCS([ioctl nl_langinfo strsignal setenv unsetenv],[:],[
   missing_functions="$missing_functions $ac_func"
 ])
 # fsync will do if fdatasync not available
@@ -461,6 +461,28 @@ if test $want_gtk = yes; then
 fi
 
 if test "x$GCC" = xyes; then
+  # We need LLONG_MAX and annoyingly GCC doesn't always give it to us
+  # by default.
+  AC_CACHE_CHECK([what C version to ask for],[rjk_cv_cstd],[
+    AC_TRY_COMPILE([#include <limits.h>],[
+      long long n = LLONG_MAX;
+    ],[rjk_cv_cstd=default],[
+      old_CC="$CC"
+      CC="${CC} -std=gnu99"
+      AC_TRY_COMPILE([#include <limits.h>],[
+        long long n = LLONG_MAX;
+      ],[rjk_cv_cstd=gnu99],[rjk_cv_cstd=unknown])
+      CC="$old_CC"
+    ])
+  ])
+  case $rjk_cv_cstd in
+  default | unknown )
+    ;;
+  * )
+    CC="${CC} -std=${rjk_cv_cstd}"
+    ;;
+  esac
+
   # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29478
   AC_CACHE_CHECK([checking for GCC bug 29478],[rjk_cv_pr29478],[
     old_CC="$CC"
@@ -554,7 +576,6 @@ AH_BOTTOM([#ifdef __GNUC__
 #endif])
 
 AC_CONFIG_FILES([Makefile
-		 templates/Makefile
 		 images/Makefile
 		 scripts/Makefile
 		 lib/Makefile
@@ -562,6 +583,7 @@ AC_CONFIG_FILES([Makefile
 		 clients/Makefile
 		 disobedience/Makefile
 		 doc/Makefile
+		 templates/Makefile
 		 plugins/Makefile
 		 driver/Makefile
 		 debian/Makefile