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* OS X: Always generate -isysroot if any SDK is in useBrad King2012-09-211-1/+1
| | | | | | | | Drop the last use of CMAKE_OSX_SYSROOT_DEFAULT. Replace internal platform variable CMAKE_${lang}_HAS_ISYSROOT with a more general CMAKE_${lang}_SYSROOT_FLAG variable. If the -isysroot flag exists and CMAKE_OSX_SYSROOT points to an SDK (not "/") then always add it to compiler command lines. This is already done in the Xcode IDE.
* Fix issue #10155 - default value of CMAKE_OSX_DEPLOYMENT_TARGET should ↵David Cole2010-01-291-0/+1
| | | | always be the empty string. When the value of CMAKE_OSX_DEPLOYMENT_TARGET is the empty string, the -mmacosx-version-min flag should not show up on the compiler command line. The logic for selecting default value of CMAKE_OSX_SYSROOT is orthogonal to and independent of the value of the deployment target. The default value for CMAKE_OSX_SYSROOT is the SDK that corresponds to the current version of Mac OSX on which cmake is running.
* Fix OS X dylib and module GNU flagsBrad King2009-12-021-0/+1
| | | | | | | | | | | The commit "Split GNU compiler information files" broke the settings of CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS and started using just "-shared" for them. This worked when tested on newer Mac machines, but older ones really need "-dynamiclib" and "-bundle" (which are the documented flags anyway).
* Fix check for -isysroot on OS XBrad King2009-09-191-0/+2
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.