From: Todd C. Miller <Todd.Miller@courtesan.com>
Date: Mon, 30 Jul 2007 13:29:06 +0000 (+0000)
Subject: Fix link tests such that new gcc doesn't optimize away the test.
X-Git-Tag: SUDO_1_7_0~455
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e81f9efd144f78af84ff5747627eeb5fa4b819c8;p=sudo

Fix link tests such that new gcc doesn't optimize away the test.
---

diff --git a/aclocal.m4 b/aclocal.m4
index 1e27c39fe..7e1611f55 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -229,7 +229,7 @@ dnl check for isblank(3)
 dnl
 AC_DEFUN([SUDO_FUNC_ISBLANK],
   [AC_CACHE_CHECK([for isblank], sudo_cv_func_isblank,
-    [AC_TRY_LINK([#include <ctype.h>], [(void)isblank(1);],
+    [AC_TRY_LINK([#include <ctype.h>], [return (isblank('a'));],
     sudo_cv_func_isblank=yes, sudo_cv_func_isblank=no)])
 ] [
   if test "$sudo_cv_func_isblank" = "yes"; then
diff --git a/configure b/configure
index 348384aa1..9a23af89f 100755
--- a/configure
+++ b/configure
@@ -15793,7 +15793,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 int
 main ()
 {
-(void)isblank(1);
+return (isblank('a'));
   ;
   return 0;
 }
@@ -16785,7 +16785,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 int
 main ()
 {
-DIR d; (void)&d.dd_fd;
+DIR d; memset(&d, 0, sizeof(d)); return(d.dd_fd);
   ;
   return 0;
 }
diff --git a/configure.in b/configure.in
index b569f21ab..2a86000f8 100644
--- a/configure.in
+++ b/configure.in
@@ -1728,7 +1728,7 @@ dnl Check for the dirfd function/macro.  If not found, look for dd_fd in DIR.
 dnl
 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #include <$ac_header_dirent>]], [[DIR d; (void)dirfd(&d);]])], [AC_DEFINE(HAVE_DIRFD)], [AC_TRY_LINK([#include <sys/types.h>
-#include <$ac_header_dirent>], [DIR d; (void)&d.dd_fd;], [AC_DEFINE(HAVE_DD_FD)])])
+#include <$ac_header_dirent>], [DIR d; memset(&d, 0, sizeof(d)); return(d.dd_fd);], [AC_DEFINE(HAVE_DD_FD)])])
 dnl
 dnl If NEED_SNPRINTF is set, add snprintf.c to LIBOBJS
 dnl (it contains snprintf, vsnprintf, asprintf, and vasprintf)