From 802cc383443d01890a3da18095b426e6ad758a4c Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 21 Jan 2004 15:11:48 -0500
Subject: BUG#530: Using #error to report a nice error message if the C
 compiler is set to a C++ compiler.

---
 Modules/CMakeTestCCompiler.cmake | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Modules/CMakeTestCCompiler.cmake b/Modules/CMakeTestCCompiler.cmake
index 5484ce1..fc5791a 100644
--- a/Modules/CMakeTestCCompiler.cmake
+++ b/Modules/CMakeTestCCompiler.cmake
@@ -5,7 +5,11 @@
 # any makefiles or projects.
 IF(NOT CMAKE_C_COMPILER_WORKS)
   MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER}")
-  FILE(WRITE ${CMAKE_BINARY_DIR}/CMakeTmp/testCCompiler.c "int main(){return 0;}\n")
+  FILE(WRITE ${CMAKE_BINARY_DIR}/CMakeTmp/testCCompiler.c
+    "#ifdef __cplusplus\n"
+    "# error \"The CMAKE_C_COMPILER is set to a C++ compiler\"\n"
+    "#endif\n"
+    "int main(){return 0;}\n")
   TRY_COMPILE(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR} 
     ${CMAKE_BINARY_DIR}/CMakeTmp/testCCompiler.c
     OUTPUT_VARIABLE OUTPUT)
-- 
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