Merge remote-tracking branch 'origin/mq-filter-stack'

1 files changed, 43 insertions, 0 deletions

diff --git a/aclocal.m4 b/aclocal.m4
index c401d447..746d5df5 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,6 +1,25 @@
 dnl ** Additional Autoconf tests for BIRD configure script
 dnl ** (c) 1999 Martin Mares <mj@ucw.cz>
 
+AC_DEFUN([BIRD_CHECK_THREAD_LOCAL],
+[
+  AC_CACHE_CHECK(
+    [whether _Thread_local is known],
+    [bird_cv_thread_local],
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM(
+        [
+	  _Thread_local static int x = 42;
+	],
+	[]
+      )
+    ],
+    [bird_cv_thread_local=yes],
+    [bird_cv_thread_local=no]
+    )
+  )
+])
+
 AC_DEFUN([BIRD_CHECK_PTHREADS],
 [
   bird_tmp_cflags="$CFLAGS"
@@ -131,6 +150,30 @@ AC_DEFUN([BIRD_CHECK_ANDROID_LOG],
   )
 ])
 
+AC_DEFUN([BIRD_CHECK_LTO],
+[
+  bird_tmp_cflags="$CFLAGS"
+  bird_tmp_ldflags="$LDFLAGS"
+  CFLAGS="-flto"
+  LDFLAGS="-flto"
+
+  AC_CACHE_CHECK(
+    [whether link time optimizer is available],
+    [bird_cv_c_lto],
+    [
+      AC_LINK_IFELSE(
+	[AC_LANG_PROGRAM()],
+	[bird_cv_c_lto=yes],
+	[bird_cv_c_lto=no]
+      )
+    ]
+  )
+
+  CFLAGS="$bird_tmp_cflags"
+  LDFLAGS="$bird_tmp_ldflags"
+])
+
+
 AC_DEFUN([BIRD_CHECK_GCC_OPTION],
 [
   bird_tmp_cflags="$CFLAGS"