disable system issetugid on OS X since it is not fork-safe

Noticed while testing similar code for AIX.
ok beck@

1 files changed, 5 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 46e9a40..391b232 100644
--- a/configure.ac
+++ b/configure.ac
@@ -226,6 +226,11 @@ AM_CONDITIONAL([HAVE_ARC4RANDOM_BUF],
            -a "x$HOST_OS" != xnetbsd \
            -a "x$ac_cv_func_arc4random_buf" = xyes])
 
+# overrides for issetugid implementations with known issues
+AM_CONDITIONAL([HAVE_ISSETUGID],
+       [test "x$HOST_OS" != xdarwin
+          -a "x$ac_cv_func_issetugid" = xyes])
+
 AC_CACHE_CHECK([whether va_copy exists], ac_cv_have_va_copy, [
         AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <stdarg.h>