summaryrefslogtreecommitdiffstats
path: root/m4/pdns_pie.m4
diff options
context:
space:
mode:
Diffstat (limited to 'm4/pdns_pie.m4')
-rw-r--r--m4/pdns_pie.m455
1 files changed, 55 insertions, 0 deletions
diff --git a/m4/pdns_pie.m4 b/m4/pdns_pie.m4
new file mode 100644
index 0000000..98d3923
--- /dev/null
+++ b/m4/pdns_pie.m4
@@ -0,0 +1,55 @@
+dnl
+dnl Check for support for position independent executables
+dnl
+dnl Copyright (C) 2013 Red Hat, Inc.
+dnl
+dnl This library is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU Lesser General Public
+dnl License as published by the Free Software Foundation; either
+dnl version 2.1 of the License, or (at your option) any later version.
+dnl
+dnl This library is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with this library. If not, see
+dnl <http://www.gnu.org/licenses/>.
+dnl
+
+AC_DEFUN([AC_CC_PIE],[
+ AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+ PIE_CFLAGS=
+ PIE_LDFLAGS=
+ OLD_CXXFLAGS=$CXXFLAGS
+ case "$host" in
+ *-*-mingw* | *-*-msvc* | *-*-cygwin* )
+ ;; dnl All code is position independent on Win32 target
+ *)
+ CXXFLAGS="-fPIE -DPIE"
+ gl_COMPILER_OPTION_IF([-pie], [
+ PIE_CFLAGS="-fPIE -DPIE"
+ PIE_LDFLAGS="-pie"
+ ], [
+ dnl some versions of clang require -Wl,-pie instead of -pie
+ gl_COMPILER_OPTION_IF([[-Wl,-pie]], [
+ PIE_CFLAGS="-fPIE -DPIE"
+ PIE_LDFLAGS="-Wl,-pie"
+ ], [],
+ [AC_LANG_PROGRAM([[
+#include <pthread.h>
+__thread unsigned int t_id;
+ ]], [[t_id = 1;]])]
+ )
+ ],
+ [AC_LANG_PROGRAM([[
+#include <pthread.h>
+__thread unsigned int t_id;
+ ]], [[t_id = 1;]])]
+ )
+ esac
+ CXXFLAGS=$OLD_CXXFLAGS
+ AC_SUBST([PIE_CFLAGS])
+ AC_SUBST([PIE_LDFLAGS])
+])