Don't use readlinkat if it does not exist

[libserialport.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 857e4ba84973a08674ceb7efd29da10ef765a6f2..22c47ce4ebfe2d41f1109562f72ef4f331dd2391 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -119,6 +119,9 @@ AC_CHECK_MEMBERS([struct termios.c_ispeed, struct termios.c_ospeed],
 AC_CHECK_MEMBERS([struct termios2.c_ispeed, struct termios2.c_ospeed],
        [AC_DEFINE(HAVE_TERMIOS2_SPEED, 1)], [], [[#include <linux/termios.h>]])
 
+# Check for readlinkat.
+AC_CHECK_FUNC([readlinkat], [AC_DEFINE(HAVE_READLINKAT, 1)], [])
+
 saved="$CFLAGS"; CFLAGS="$CFLAGS -Werror"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
                __attribute__((visibility("hidden"))) void foo(void) { }