diff options
Diffstat (limited to 'Modules/Platform')
| -rw-r--r-- | Modules/Platform/Darwin-Initialize.cmake | 87 |
1 files changed, 76 insertions, 11 deletions
diff --git a/Modules/Platform/Darwin-Initialize.cmake b/Modules/Platform/Darwin-Initialize.cmake index 80e668e..80e9a40 100644 --- a/Modules/Platform/Darwin-Initialize.cmake +++ b/Modules/Platform/Darwin-Initialize.cmake @@ -133,6 +133,80 @@ function(_apple_resolve_sdk_path sdk_name ret) ) set(${ret} "${_stdout}" PARENT_SCOPE) endfunction() + +function(_apple_resolve_supported_archs_for_sdk_from_system_lib sdk_path ret ret_failed) + # Detect the supported SDK architectures by inspecting the main libSystem library. + set(common_lib_prefix "${sdk_path}/usr/lib/libSystem") + set(system_lib_dylib_path "${common_lib_prefix}.dylib") + set(system_lib_tbd_path "${common_lib_prefix}.tbd") + + # Newer SDKs ship text based dylib stub files which contain the architectures supported by the + # library in text form. + if(EXISTS "${system_lib_tbd_path}") + file(STRINGS "${system_lib_tbd_path}" tbd_lines REGEX "^archs: +\\[.+\\]") + if(NOT tbd_lines) + set(${ret_failed} TRUE PARENT_SCOPE) + return() + endif() + + # The tbd architectures line looks like the following: + # archs: [ armv7, armv7s, arm64, arm64e ] + list(GET tbd_lines 0 first_arch_line) + string(REGEX REPLACE + "archs: +\\[ (.+) \\]" "\\1" arches_comma_separated "${first_arch_line}") + string(STRIP "${arches_comma_separated}" arches_comma_separated) + string(REPLACE "," ";" arch_list "${arches_comma_separated}") + string(REPLACE " " "" arch_list "${arch_list}") + if(NOT arch_list) + set(${ret_failed} TRUE PARENT_SCOPE) + return() + endif() + set(${ret} "${arch_list}" PARENT_SCOPE) + elseif(EXISTS "${system_lib_dylib_path}") + # Old SDKs (Xcode < 7) ship dylib files, use lipo to inspect the supported architectures. + # Can't use -archs because the option is not available in older Xcode versions. + execute_process( + COMMAND lipo -info ${system_lib_dylib_path} + OUTPUT_VARIABLE lipo_output + OUTPUT_STRIP_TRAILING_WHITESPACE + ERROR_VARIABLE _stderr + RESULT_VARIABLE _failed + ) + if(_failed OR NOT lipo_output OR NOT lipo_output MATCHES "(Non-fat file:|Architectures in the fat file:)") + set(${ret_failed} TRUE PARENT_SCOPE) + return() + endif() + + # The lipo output looks like the following: + # Non-fat file: <path> is architecture: i386 + # Architectures in the fat file: <path> are: i386 x86_64 + string(REGEX REPLACE + "^(.+)is architecture:(.+)" "\\2" arches_space_separated "${lipo_output}") + string(REGEX REPLACE + "^(.+)are:(.+)" "\\2" arches_space_separated "${arches_space_separated}") + + # Need to clean up the arches, with Xcode 4.6.3 the output of lipo -info contains some + # additional info, e.g. + # Architectures in the fat file: <path> are: armv7 (cputype (12) cpusubtype (11)) + string(REGEX REPLACE + "\\(.+\\)" "" arches_space_separated "${arches_space_separated}") + + # The output is space separated. + string(STRIP "${arches_space_separated}" arches_space_separated) + string(REPLACE " " ";" arch_list "${arches_space_separated}") + + if(NOT arch_list) + set(${ret_failed} TRUE PARENT_SCOPE) + return() + endif() + set(${ret} "${arch_list}" PARENT_SCOPE) + else() + # This shouldn't happen, but keep it for safety. + message(WARNING "No way to find architectures for given sdk_path '${sdk_path}'") + set(${ret_failed} TRUE PARENT_SCOPE) + endif() +endfunction() + # Handle multi-arch sysroots. Do this before CMAKE_OSX_SYSROOT is # transformed into a path, so that we know the sysroot name. function(_apple_resolve_multi_arch_sysroots) @@ -166,13 +240,8 @@ function(_apple_resolve_multi_arch_sysroots) continue() endif() - execute_process( - COMMAND plutil -extract SupportedTargets.${sdk}.Archs json ${_sdk_path}/SDKSettings.plist -o - - OUTPUT_VARIABLE _sdk_archs_json - OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_VARIABLE _stderr - RESULT_VARIABLE _failed - ) + _apple_resolve_supported_archs_for_sdk_from_system_lib(${_sdk_path} _sdk_archs _failed) + if(_failed) # Failure to extract supported architectures for an SDK means that the installed SDK is old # and does not provide such information (SDKs that come with Xcode >= 10.x started providing @@ -181,10 +250,6 @@ function(_apple_resolve_multi_arch_sysroots) return() endif() - # Poor man's JSON decoding - string(REGEX REPLACE "[]\\[\"]" "" _sdk_archs ${_sdk_archs_json}) - string(REPLACE "," ";" _sdk_archs ${_sdk_archs}) - set(_sdk_archs_${sdk} ${_sdk_archs}) set(_sdk_path_${sdk} ${_sdk_path}) endforeach() |