From 49d1f4cdde6d3289cb8c18ad35fc739371e25388 Mon Sep 17 00:00:00 2001
From: Chun Kuan Lee <ken2812221@gmail.com>
Date: Sun, 1 Jul 2018 13:58:37 +0000
Subject: Detect if char equals int8_t

---
 configure.ac | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index e4142f5762..9fba9d0851 100644
--- a/configure.ac
+++ b/configure.ac
@@ -808,6 +808,14 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
  [ AC_MSG_RESULT(no)]
 )
 
+AC_MSG_CHECKING(for if type char equals int8_t)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdint.h>
+  #include <type_traits>]],
+ [[ static_assert(std::is_same<int8_t, char>::value, ""); ]])],
+ [ AC_MSG_RESULT(yes); AC_DEFINE(CHAR_EQUALS_INT8, 1,[Define this symbol if type char equals int8_t]) ],
+ [ AC_MSG_RESULT(no)]
+)
+
 # Check for reduced exports
 if test x$use_reduce_exports = xyes; then
   AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],[RE_CXXFLAGS="-fvisibility=hidden"],
-- 
cgit v1.2.3