Doc: Update prefix set comment

[thirdparty/bird.git] / aclocal.m4

diff --git a/aclocal.m4 b/aclocal.m4
index 0044adf9b4142dadd8aa5cccca74e0e091f870ce..1613d6803007d4cb9474672b2181be40294e3339 100644 (file)
--- 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="$CFLAGS"
@@ -134,9 +153,9 @@ AC_DEFUN([BIRD_CHECK_ANDROID_LOG],
 AC_DEFUN([BIRD_CHECK_LTO],
 [
   bird_tmp_cflags="$CFLAGS"
-  bird_tmp_ldflags="$CFLAGS"
+  bird_tmp_ldflags="$LDFLAGS"
   CFLAGS="-flto"
-  LDFLAGS="-flto"
+  LDFLAGS="-flto=4"
 
   AC_CACHE_CHECK(
     [whether link time optimizer is available],