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Fix check for -isysroot on OS X 

Previously we checked for this flag by parsing the version number of GCC
out of 'gcc --version', but this is not reliable because the format can
vary greatly.  Now we run 'gcc -v --help' and look for '-isysroot' in
the list of options.

We also now store the result on a per-language basis in the per-compiler
info file "CMake<LANG>Compiler.cmake".  This is necessary to make it
accessible from try-compile projects so that they generate correctly.
This commit is contained in:
Brad King 2009-09-19 10:14:31 -04:00
parent 196d9a54aa
commit 180c60a86f
7 changed files with 28 additions and 21 deletions
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2
Modules/CMakeCCompiler.cmake.in
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@ -35,5 +35,7 @@ IF(CMAKE_C_COMPILER_ABI)
SET(CMAKE_INTERNAL_PLATFORM_ABI "${CMAKE_C_COMPILER_ABI}")
ENDIF(CMAKE_C_COMPILER_ABI)
SET(CMAKE_C_HAS_ISYSROOT "@CMAKE_C_HAS_ISYSROOT@")
SET(CMAKE_C_IMPLICIT_LINK_LIBRARIES "@CMAKE_C_IMPLICIT_LINK_LIBRARIES@")
SET(CMAKE_C_IMPLICIT_LINK_DIRECTORIES "@CMAKE_C_IMPLICIT_LINK_DIRECTORIES@")

2
Modules/CMakeCXXCompiler.cmake.in
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@ -36,5 +36,7 @@ IF(CMAKE_CXX_COMPILER_ABI)
SET(CMAKE_INTERNAL_PLATFORM_ABI "${CMAKE_CXX_COMPILER_ABI}")
ENDIF(CMAKE_CXX_COMPILER_ABI)
SET(CMAKE_CXX_HAS_ISYSROOT "@CMAKE_CXX_HAS_ISYSROOT@")
SET(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "@CMAKE_CXX_IMPLICIT_LINK_LIBRARIES@")
SET(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "@CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES@")

2
Modules/Platform/Darwin-GNU-C.cmake Normal file
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@ -0,0 +1,2 @@
include(Platform/Darwin-GNU)
cmake_gnu_has_isysroot(C)

2
Modules/Platform/Darwin-GNU-CXX.cmake Normal file
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@ -0,0 +1,2 @@
include(Platform/Darwin-GNU)
cmake_gnu_has_isysroot(CXX)

18
Modules/Platform/Darwin-GNU.cmake Normal file
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@ -0,0 +1,18 @@
macro(cmake_gnu_has_isysroot lang)
if("x${CMAKE_${lang}_HAS_ISYSROOT}" STREQUAL "x")
set(_doc "${lang} compiler has -isysroot")
message(STATUS "Checking whether ${_doc}")
execute_process(
COMMAND ${CMAKE_${lang}_COMPILER} "-v" "--help"
OUTPUT_VARIABLE _gcc_help
ERROR_VARIABLE _gcc_help
)
if("${_gcc_help}" MATCHES "isysroot")
message(STATUS "Checking whether ${_doc} - yes")
set(CMAKE_${lang}_HAS_ISYSROOT 1)
else()
message(STATUS "Checking whether ${_doc} - no")
set(CMAKE_${lang}_HAS_ISYSROOT 0)
endif()
endif()
endmacro()

14
Modules/Platform/Darwin.cmake
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@ -182,20 +182,6 @@ IF(XCODE)
SET(CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
ENDIF(XCODE)
IF(NOT CMAKE_OSX_GCC_SUPPORT_ISYSROOT)
IF("${CMAKE_C_COMPILER_ID}" MATCHES "GNU")
EXECUTE_PROCESS(COMMAND ${CMAKE_C_COMPILER} "--version"
OUTPUT_VARIABLE GCC_VERSION)
ENDIF("${CMAKE_C_COMPILER_ID}" MATCHES "GNU")
STRING(REGEX REPLACE "^[^ ]+[ ][^ ]+[ ]([^ ]+).*$" "\\1"
gcc_version_tmp "${GCC_VERSION}")
IF(${gcc_version_tmp} VERSION_GREATER 3.9)
SET(CMAKE_OSX_GCC_SUPPORT_ISYSROOT TRUE CACHE INTERNAL "GCC supports isysroot")
ELSE(${gcc_version_tmp} VERSION_GREATER 3.9)
SET(CMAKE_OSX_GCC_SUPPORT_ISYSROOT FALSE CACHE INTERNAL "GCC supports isysroot")
ENDIF(${gcc_version_tmp} VERSION_GREATER 3.9)
ENDIF(NOT CMAKE_OSX_GCC_SUPPORT_ISYSROOT)
# Need to list dependent shared libraries on link line. When building
# with -isysroot (for universal binaries), the linker always looks for
# dependent libraries under the sysroot. Listing them on the link

9
Source/cmLocalGenerator.cxx
View File

@ -1760,13 +1760,8 @@ void cmLocalGenerator::AddLanguageFlags(std::string& flags,
this->Makefile->GetDefinition("CMAKE_OSX_SYSROOT_DEFAULT");
const char* deploymentTarget =
this->Makefile->GetDefinition("CMAKE_OSX_DEPLOYMENT_TARGET");
const char* gccHasIsysroot =
this->Makefile->GetRequiredDefinition("CMAKE_OSX_GCC_SUPPORT_ISYSROOT");
bool hasIsysroot = true;
if(cmSystemTools::IsOff(gccHasIsysroot))
{
hasIsysroot = false;
}
std::string isysrootVar = std::string("CMAKE_") + lang + "_HAS_ISYSROOT";
bool hasIsysroot = this->Makefile->IsOn(isysrootVar.c_str());
bool flagsUsed = false;
if(osxArch && sysroot && lang && (lang[0] =='C' || lang[0] == 'F'))
{