added ZPL 2.1 to floss exception

[rrdtool.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 0977c8a9943fd4cb73441211fbfef84679d8d37b..561241814a137488679a31cf23a899c99929c89c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -49,7 +49,7 @@ AH_TOP([
 /* realloc does not support NULL as argument */
 #undef NO_NULL_REALLOC
 
-/* lets enable madvise defines in netbsd */
+/* lets enable madvise defines in NetBSD */
 #if defined(__NetBSD__)
 # if !defined(_NETBSD_SOURCE)
 #  define _NETBSD_SOURCE
@@ -60,7 +60,8 @@ AH_TOP([
 
 AH_BOTTOM([
 #ifdef HAVE_FEATURES_H
-#define _XOPEN_SOURCE 600   
+#define _XOPEN_SOURCE 600
+#undef _BSD_SOURCE /* comment to prevent configure from modifying this line */   
 #define _BSD_SOURCE 1
 # include <features.h>
 #endif
@@ -194,12 +195,15 @@ char *strchr (), *strrchr ();
 /* for Solaris */
 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS))
 #  define HAVE_ISINF 1
+#  ifdef isinf
+#  undef isinf /* confuse autoconf */
+#  endif
 #  define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF)
 #endif
 
 /* solaris 10 it defines isnan such that only forte can compile it ... bad bad  */
 #if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS))
-#  undefine isnan
+#  undef isnan  /* confuse autoconf to NOT remove this */
 #  define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
 #endif
 
@@ -312,7 +316,7 @@ CONFIGURE_PART(Checking for Header Files)
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_HEADER_DIRENT
-AC_CHECK_HEADERS( sys/stat.h sys/types.h fcntl.h locale.h fp_class.h malloc.h unistd.h ieeefp.h math.h sys/times.h sys/param.h sys/resource.h float.h strings.h)
+AC_CHECK_HEADERS( features.h sys/stat.h sys/types.h fcntl.h locale.h fp_class.h malloc.h unistd.h ieeefp.h math.h sys/times.h sys/param.h sys/resource.h float.h strings.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST