summaryrefslogtreecommitdiff
path: root/Modules/CMakeTestCCompiler.cmake
diff options
context:
space:
mode:
Diffstat (limited to 'Modules/CMakeTestCCompiler.cmake')
-rw-r--r--Modules/CMakeTestCCompiler.cmake90
1 files changed, 48 insertions, 42 deletions
diff --git a/Modules/CMakeTestCCompiler.cmake b/Modules/CMakeTestCCompiler.cmake
index 779b2f0..2c75147 100644
--- a/Modules/CMakeTestCCompiler.cmake
+++ b/Modules/CMakeTestCCompiler.cmake
@@ -1,6 +1,6 @@
#=============================================================================
-# Copyright 2003-2009 Kitware, Inc.
+# Copyright 2003-2012 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
@@ -12,16 +12,27 @@
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
-INCLUDE(CMakeTestCompilerCommon)
+if(CMAKE_C_COMPILER_FORCED)
+ # The compiler configuration was forced by the user.
+ # Assume the user has configured all compiler information.
+ set(CMAKE_C_COMPILER_WORKS TRUE)
+ return()
+endif()
+
+include(CMakeTestCompilerCommon)
+
+# Remove any cached result from an older CMake version.
+# We now store this in CMakeCCompiler.cmake.
+unset(CMAKE_C_COMPILER_WORKS CACHE)
# This file is used by EnableLanguage in cmGlobalGenerator to
# determine that that selected C compiler can actually compile
# and link the most basic of programs. If not, a fatal error
# is set and cmake stops processing commands and will not generate
# any makefiles or projects.
-IF(NOT CMAKE_C_COMPILER_WORKS)
+if(NOT CMAKE_C_COMPILER_WORKS)
PrintTestCompilerStatus("C" "")
- FILE(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
+ file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
"#ifdef __cplusplus\n"
"# error \"The CMAKE_C_COMPILER is set to a C++ compiler\"\n"
"#endif\n"
@@ -33,55 +44,50 @@ IF(NOT CMAKE_C_COMPILER_WORKS)
"int main(int argc, char* argv[])\n"
"#endif\n"
"{ (void)argv; return argc-1;}\n")
- TRY_COMPILE(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR}
+ try_compile(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR}
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
OUTPUT_VARIABLE __CMAKE_C_COMPILER_OUTPUT)
- SET(C_TEST_WAS_RUN 1)
-ENDIF(NOT CMAKE_C_COMPILER_WORKS)
+ # Move result from cache to normal variable.
+ set(CMAKE_C_COMPILER_WORKS ${CMAKE_C_COMPILER_WORKS})
+ unset(CMAKE_C_COMPILER_WORKS CACHE)
+ set(C_TEST_WAS_RUN 1)
+endif()
-IF(NOT CMAKE_C_COMPILER_WORKS)
+if(NOT CMAKE_C_COMPILER_WORKS)
PrintTestCompilerStatus("C" " -- broken")
- FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+ file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Determining if the C compiler works failed with "
"the following output:\n${__CMAKE_C_COMPILER_OUTPUT}\n\n")
- # if the compiler is broken make sure to remove the platform file
- # since Windows-cl configures both c/cxx files both need to be removed
- # when c or c++ fails
- FILE(REMOVE ${CMAKE_PLATFORM_ROOT_BIN}/CMakeCPlatform.cmake )
- FILE(REMOVE ${CMAKE_PLATFORM_ROOT_BIN}/CMakeCXXPlatform.cmake )
- MESSAGE(FATAL_ERROR "The C compiler \"${CMAKE_C_COMPILER}\" "
+ message(FATAL_ERROR "The C compiler \"${CMAKE_C_COMPILER}\" "
"is not able to compile a simple test program.\nIt fails "
"with the following output:\n ${__CMAKE_C_COMPILER_OUTPUT}\n\n"
"CMake will not be able to correctly generate this project.")
-ELSE(NOT CMAKE_C_COMPILER_WORKS)
- IF(C_TEST_WAS_RUN)
+else()
+ if(C_TEST_WAS_RUN)
PrintTestCompilerStatus("C" " -- works")
- FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+ file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determining if the C compiler works passed with "
"the following output:\n${__CMAKE_C_COMPILER_OUTPUT}\n\n")
- ENDIF(C_TEST_WAS_RUN)
- SET(CMAKE_C_COMPILER_WORKS 1 CACHE INTERNAL "")
+ endif()
+
+ # Try to identify the ABI and configure it into CMakeCCompiler.cmake
+ include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
+ CMAKE_DETERMINE_COMPILER_ABI(C ${CMAKE_ROOT}/Modules/CMakeCCompilerABI.c)
+
+ # Re-configure to save learned information.
+ configure_file(
+ ${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
+ ${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake
+ @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
+ )
+ include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake)
- IF(CMAKE_C_COMPILER_FORCED)
- # The compiler configuration was forced by the user.
- # Assume the user has configured all compiler information.
- ELSE(CMAKE_C_COMPILER_FORCED)
- # Try to identify the ABI and configure it into CMakeCCompiler.cmake
- INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
- CMAKE_DETERMINE_COMPILER_ABI(C ${CMAKE_ROOT}/Modules/CMakeCCompilerABI.c)
- CONFIGURE_FILE(
- ${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
- ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCCompiler.cmake
- @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
- )
- INCLUDE(${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCCompiler.cmake)
- ENDIF(CMAKE_C_COMPILER_FORCED)
- IF(CMAKE_C_SIZEOF_DATA_PTR)
- FOREACH(f ${CMAKE_C_ABI_FILES})
- INCLUDE(${f})
- ENDFOREACH()
- UNSET(CMAKE_C_ABI_FILES)
- ENDIF()
-ENDIF(NOT CMAKE_C_COMPILER_WORKS)
+ if(CMAKE_C_SIZEOF_DATA_PTR)
+ foreach(f ${CMAKE_C_ABI_FILES})
+ include(${f})
+ endforeach()
+ unset(CMAKE_C_ABI_FILES)
+ endif()
+endif()
-UNSET(__CMAKE_C_COMPILER_OUTPUT)
+unset(__CMAKE_C_COMPILER_OUTPUT)