From 0ddadad7333a999ab3289fd6d47433e4984d182e Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Fri, 29 May 2015 20:47:36 +0200
Subject: Cope with broken snprintf on Windows

On Windows, snprintf returns -1 if the output was truncated. Fall back to
Windows-specific _scprintf.
---
 src/CMakeLists.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/CMakeLists.txt')

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f27186e..19a5258 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -128,6 +128,7 @@ install(FILES
 # Feature tests
 include(CheckIncludeFile)
 include(CheckCSourceCompiles)
+include(CheckCSourceRuns)
 include(CheckSymbolExists)
 CHECK_INCLUDE_FILE(stdbool.h HAVE_STDBOOL_H)
 CHECK_C_SOURCE_COMPILES(
@@ -137,6 +138,10 @@ CHECK_C_SOURCE_COMPILES("
   int f(void) __attribute__ (());
   int main() { return 0; }
 " HAVE___ATTRIBUTE__)
+CHECK_C_SOURCE_RUNS("
+  #include <stdio.h>
+  int main() { return snprintf(NULL, 0, \"123\") == 3 ? 0 : 1; }
+" HAVE_C99_SNPRINTF)
 CHECK_SYMBOL_EXISTS(va_copy stdarg.h HAVE_VA_COPY)
 
 CONFIGURE_FILE(
@@ -167,4 +172,4 @@ endif($ENV{TIMER})
 
 if(CMAKE_BUILD_TYPE STREQUAL "Ubsan")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined")
-endif()
\ No newline at end of file
+endif()
-- 
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