From e19f2ffa6322de454cfaf6e89f1f184c273506c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20S=2E=20Ga=C3=9Fmann?= <henrik@gassmann.onl>
Date: Fri, 11 Sep 2015 00:45:53 +0200
Subject: [PATCH] FIX CMake snprintf DETECTION

Replace check_function_exists calls with check_symbol_exists calls for
snprintf detection because starting with MSVC 19 snprintf is declared as
an inline function thus check_function_exists fails to detect it.
(See http://public.kitware.com/Bug/view.php?id=15659)
---
 CMakeLists.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bfe8604..bad9e8a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,6 +100,7 @@ include (CheckFunctionExists)
 include (CheckFunctionKeywords)
 include (CheckIncludeFiles)
 include (CheckTypeSize)
+include (CheckSymbolExists)
 
 if (MSVC)
    # Turn off Microsofts "security" warnings.
@@ -304,8 +305,8 @@ else()
 endif()
 
 # Find our snprintf
-check_function_exists (snprintf HAVE_SNPRINTF)
-check_function_exists (_snprintf HAVE__SNPRINTF)
+check_symbol_exists(snprintf stdio.h HAVE_SNPRINTF)
+check_symbol_exists(_snprintf stdio.h HAVE__SNPRINTF)
 
 if (HAVE_SNPRINTF)
    set(JSON_SNPRINTF snprintf)