From 2dd67c7ea095957d557d2934a67baacdf8a82d7b Mon Sep 17 00:00:00 2001 From: Brad King Date: Wed, 5 Dec 2012 11:49:13 -0500 Subject: [PATCH] OS X: Detect implicit link directories on modern toolchains We detect the implicit link directories for the toolchain by adding a flag to get verbose output from the compiler front-end while linking the ABI detection binary. Newer OS X toolchains based on Clang do not add the implicit link directories with -L options to their internal invocation of "ld". Instead they use a linker that comes with the toolchain and is already configured with the proper directories. Add the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays them in a block such as: Library search paths: /... Parse this block to extract the implicit link directories. While at it, remove the checks introduced by commit efaf335b (Skip implicit link information on Xcode, 2009-07-23) and commit 5195a664 (Skip implicit link info for multiple OS X archs, 2009-09-22). Discard the non-system link directories added by Xcode. Discard all detected implicit libraries in the multi-architecture case but keep the directories. The directories are still useful without the libraries just to suppress addition of explicit -L options for them. --- Modules/CMakeDetermineCompilerABI.cmake | 21 ++-- Modules/CMakeParseImplicitLinkInfo.cmake | 29 +++++- Modules/Platform/Darwin-Clang.cmake | 1 + Modules/Platform/Darwin-GNU.cmake | 1 + .../CMakeTests/ImplicitLinkInfoTest.cmake.in | 97 +++++++++++++++++++ 5 files changed, 134 insertions(+), 15 deletions(-) diff --git a/Modules/CMakeDetermineCompilerABI.cmake b/Modules/CMakeDetermineCompilerABI.cmake index 75247d955..cb94aa655 100644 --- a/Modules/CMakeDetermineCompilerABI.cmake +++ b/Modules/CMakeDetermineCompilerABI.cmake @@ -72,18 +72,7 @@ function(CMAKE_DETERMINE_COMPILER_ABI lang src) # Parse implicit linker information for this language, if available. set(implicit_dirs "") set(implicit_libs "") - set(MULTI_ARCH FALSE) - if(DEFINED CMAKE_OSX_ARCHITECTURES) - if( "${CMAKE_OSX_ARCHITECTURES}" MATCHES ";" ) - set(MULTI_ARCH TRUE) - endif() - endif() - if(CMAKE_${lang}_VERBOSE_FLAG - # Implicit link information cannot be used explicitly for - # multiple OS X architectures, so we skip it. - AND NOT MULTI_ARCH - # Skip this with Xcode for now. - AND NOT "${CMAKE_GENERATOR}" MATCHES Xcode) + if(CMAKE_${lang}_VERBOSE_FLAG) CMAKE_PARSE_IMPLICIT_LINK_INFO("${OUTPUT}" implicit_libs implicit_dirs log "${CMAKE_${lang}_IMPLICIT_OBJECT_REGEX}") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log @@ -112,6 +101,14 @@ function(CMAKE_DETERMINE_COMPILER_ABI lang src) message(STATUS "${_desc}") endif() + # Implicit link libraries cannot be used explicitly for multiple + # OS X architectures, so we skip it. + if(DEFINED CMAKE_OSX_ARCHITECTURES) + if("${CMAKE_OSX_ARCHITECTURES}" MATCHES ";") + set(implicit_libs "") + endif() + endif() + set(CMAKE_${lang}_IMPLICIT_LINK_LIBRARIES "${implicit_libs}" PARENT_SCOPE) set(CMAKE_${lang}_IMPLICIT_LINK_DIRECTORIES "${implicit_dirs}" PARENT_SCOPE) diff --git a/Modules/CMakeParseImplicitLinkInfo.cmake b/Modules/CMakeParseImplicitLinkInfo.cmake index ecb20dc6b..54e812748 100644 --- a/Modules/CMakeParseImplicitLinkInfo.cmake +++ b/Modules/CMakeParseImplicitLinkInfo.cmake @@ -36,6 +36,16 @@ function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var log_var obj_regex) set(cmd) if("${line}" MATCHES "${linker_regex}" AND NOT "${line}" MATCHES "${linker_exclude_regex}") + if(XCODE) + # Xcode unconditionally adds a path under the project build tree and + # on older versions it is not reported with proper quotes. Remove it. + string(REGEX REPLACE "([][+.*()^])" "\\\\\\1" _dir_regex "${CMAKE_BINARY_DIR}") + string(REGEX REPLACE " -[FL]${_dir_regex}/([^ ]| [^-])+( |$)" " " xline "${line}") + if(NOT "x${xline}" STREQUAL "x${line}") + set(log "${log} reduced line: [${line}]\n to: [${xline}]\n") + set(line "${xline}") + endif() + endif() if(UNIX) separate_arguments(args UNIX_COMMAND "${line}") else() @@ -97,6 +107,13 @@ function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var log_var obj_regex) endif() endforeach() + # Look for library search paths reported by linker. + if("${output_lines}" MATCHES ";Library search paths:((;\t[^;]+)+)") + string(REPLACE ";\t" ";" implicit_dirs_match "${CMAKE_MATCH_1}") + set(log "${log} Library search paths: [${implicit_dirs_match}]\n") + list(APPEND implicit_dirs_tmp ${implicit_dirs_match}) + endif() + # Cleanup list of libraries and flags. # We remove items that are not language-specific. set(implicit_libs "") @@ -108,12 +125,18 @@ function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var log_var obj_regex) endif() endforeach() - # Cleanup list of directories. + # Cleanup list of library directories. set(implicit_dirs "") foreach(d IN LISTS implicit_dirs_tmp) get_filename_component(dir "${d}" ABSOLUTE) - list(APPEND implicit_dirs "${dir}") - set(log "${log} collapse dir [${d}] ==> [${dir}]\n") + string(FIND "${dir}" "${CMAKE_FILES_DIRECTORY}/" pos) + if(NOT pos LESS 0) + set(msg ", skipping non-system directory") + else() + set(msg "") + list(APPEND implicit_dirs "${dir}") + endif() + set(log "${log} collapse library dir [${d}] ==> [${dir}]${msg}\n") endforeach() list(REMOVE_DUPLICATES implicit_dirs) diff --git a/Modules/Platform/Darwin-Clang.cmake b/Modules/Platform/Darwin-Clang.cmake index de7a85636..528873cfd 100644 --- a/Modules/Platform/Darwin-Clang.cmake +++ b/Modules/Platform/Darwin-Clang.cmake @@ -19,6 +19,7 @@ endif() set(__DARWIN_COMPILER_CLANG 1) macro(__darwin_compiler_clang lang) + set(CMAKE_${lang}_VERBOSE_FLAG "-v -Wl,-v") # also tell linker to print verbose output set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names") set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "-bundle -Wl,-headerpad_max_install_names") set(CMAKE_${lang}_SYSROOT_FLAG "-isysroot") diff --git a/Modules/Platform/Darwin-GNU.cmake b/Modules/Platform/Darwin-GNU.cmake index d9535039f..5fee7e3ae 100644 --- a/Modules/Platform/Darwin-GNU.cmake +++ b/Modules/Platform/Darwin-GNU.cmake @@ -19,6 +19,7 @@ endif() set(__DARWIN_COMPILER_GNU 1) macro(__darwin_compiler_gnu lang) + set(CMAKE_${lang}_VERBOSE_FLAG "-v -Wl,-v") # also tell linker to print verbose output # GNU does not have -shared on OS X set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names") set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "-bundle -Wl,-headerpad_max_install_names") diff --git a/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in b/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in index dbe95005e..02963042c 100644 --- a/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in +++ b/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in @@ -102,30 +102,127 @@ list(APPEND platforms linux64_test1) #----------------------------------------------------------------------------- # Mac +# gcc -arch i686 dummy.c -v -Wl,-v +set(mac_i686_gcc_Wlv_text " /usr/libexec/gcc/i686-apple-darwin10/4.2.1/collect2 -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.6.o -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. /var/tmp//ccnhXAGL.o -lSystem -lgcc -lSystem +collect2 version 4.2.1 (Apple Inc. build 5646) (i686 Darwin) +/usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.6.o -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. /var/tmp//ccSiuUhD.o -v -lSystem -lgcc -lSystem +@(#)PROGRAM:ld PROJECT:ld64-95.2.12 +Library search paths: + /usr/lib/i686-apple-darwin10/4.2.1 + /usr/lib/gcc/i686-apple-darwin10/4.2.1 + /usr/lib/gcc/i686-apple-darwin10/4.2.1 + /usr/lib/i686-apple-darwin10/4.2.1 + /usr/lib + /usr/lib + /usr/local/lib +Framework search paths: + /Library/Frameworks/ + /System/Library/Frameworks/") +set(mac_i686_gcc_Wlv_libs "") +set(mac_i686_gcc_Wlv_dirs "/usr/lib/i686-apple-darwin10/4.2.1;/usr/lib/gcc/i686-apple-darwin10/4.2.1;/usr/lib;/usr/local/lib") +list(APPEND platforms mac_i686_gcc_Wlv) + # gcc -arch i686 dummy.c -v set(mac_i686_gcc_text " /usr/libexec/gcc/i686-apple-darwin10/4.2.1/collect2 -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.6.o -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. /var/tmp//ccnhXAGL.o -lSystem -lgcc -lSystem") set(mac_i686_gcc_libs "") set(mac_i686_gcc_dirs "/usr/lib/i686-apple-darwin10/4.2.1;/usr/lib/gcc/i686-apple-darwin10/4.2.1;/usr/lib") list(APPEND platforms mac_i686_gcc) +# g++ -arch i686 dummy.cxx -v -Wl,-v +set(mac_i686_g++_Wlv_text " /usr/libexec/gcc/i686-apple-darwin10/4.2.1/collect2 -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.6.o -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. /var/tmp//ccEXXICh.o -lstdc++ -lSystem -lgcc -lSystem +collect2 version 4.2.1 (Apple Inc. build 5646) (i686 Darwin) +/usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.6.o -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. /var/tmp//ccWrBoVl.o -v -lstdc++ -lSystem -lgcc -lSystem +@(#)PROGRAM:ld PROJECT:ld64-95.2.12 +Library search paths: + /usr/lib/i686-apple-darwin10/4.2.1 + /usr/lib/gcc/i686-apple-darwin10/4.2.1 + /usr/lib/gcc/i686-apple-darwin10/4.2.1 + /usr/lib/i686-apple-darwin10/4.2.1 + /usr/lib + /usr/lib + /usr/local/lib +Framework search paths: + /Library/Frameworks/ + /System/Library/Frameworks/") +set(mac_i686_g++_Wlv_libs "stdc++") +set(mac_i686_g++_Wlv_dirs "/usr/lib/i686-apple-darwin10/4.2.1;/usr/lib/gcc/i686-apple-darwin10/4.2.1;/usr/lib;/usr/local/lib") +list(APPEND platforms mac_i686_g++_Wlv) + # g++ -arch i686 dummy.cxx -v set(mac_i686_g++_text " /usr/libexec/gcc/i686-apple-darwin10/4.2.1/collect2 -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.6.o -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. /var/tmp//ccEXXICh.o -lstdc++ -lSystem -lgcc -lSystem") set(mac_i686_g++_libs "stdc++") set(mac_i686_g++_dirs "/usr/lib/i686-apple-darwin10/4.2.1;/usr/lib/gcc/i686-apple-darwin10/4.2.1;/usr/lib") list(APPEND platforms mac_i686_g++) +# gfortran dummy.f -v -Wl,-v +set(mac_i686_gfortran_Wlv_text " /usr/local/libexec/gcc/i386-apple-darwin9.7.0/4.4.1/collect2 -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/local/lib/gcc/i386-apple-darwin9.7.0/4.4.1 -L/usr/local/lib/gcc/i386-apple-darwin9.7.0/4.4.1/../../.. /var/tmp//cc9zXNax.o -v -lgfortranbegin -lgfortran -lgcc_s.10.5 -lgcc -lSystem +collect2 version 4.4.1 20090623 (prerelease) (i686 Darwin) +/usr/bin/ld -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/local/lib/gcc/i386-apple-darwin9.7.0/4.4.1 -L/usr/local/lib/gcc/i386-apple-darwin9.7.0/4.4.1/../../.. /var/tmp//cc9zXNax.o -v -lgfortranbegin -lgfortran -lgcc_s.10.5 -lgcc -lSystem +@(#)PROGRAM:ld PROJECT:ld64-95.2.12 +Library search paths: + /usr/local/lib/gcc/i386-apple-darwin9.7.0/4.4.1 + /usr/local/lib + /usr/lib + /usr/local/lib +Framework search paths: + /Library/Frameworks/ + /System/Library/Frameworks/") +set(mac_i686_gfortran_Wlv_libs "gfortranbegin;gfortran") +set(mac_i686_gfortran_Wlv_dirs "/usr/local/lib/gcc/i386-apple-darwin9.7.0/4.4.1;/usr/local/lib;/usr/lib") +list(APPEND platforms mac_i686_gfortran_Wlv) + # gfortran dummy.f -v set(mac_i686_gfortran_text " /usr/libexec/gcc/i386-apple-darwin9.7.0/4.4.1/collect2 -dynamic -arch i386 -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/gcc/i386-apple-darwin9.7.0/4.4.1 -L/usr/lib/gcc -L/usr/lib/gcc/i386-apple-darwin9.7.0/4.4.1/../../.. /var/tmp//ccgqbX5P.o -lgfortranbegin -lgfortran -lgcc_s.10.5 -lgcc -lSystem") set(mac_i686_gfortran_libs "gfortranbegin;gfortran") set(mac_i686_gfortran_dirs "/usr/lib/gcc/i386-apple-darwin9.7.0/4.4.1;/usr/lib/gcc;/usr/lib") list(APPEND platforms mac_i686_gfortran) +# gcc -arch ppc dummy.c -v -Wl,-v +set(mac_ppc_gcc_Wlv_text " /usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/collect2 -dynamic -arch ppc -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../../powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../.. /var/tmp//cclziQY4.o -v -lgcc -lSystemStubs -lSystem +collect2 version 4.2.1 (Apple Inc. build 5646) (Darwin/PowerPC) +/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/ld -dynamic -arch ppc -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../../powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../.. /var/tmp//cclziQY4.o -v -lgcc -lSystemStubs -lSystem +@(#)PROGRAM:ld PROJECT:ld64-95.2.12 +Library search paths: + /usr/lib/powerpc-apple-darwin10/4.2.1 + /usr/lib/gcc/powerpc-apple-darwin10/4.2.1 + /usr/lib/gcc/powerpc-apple-darwin10/4.2.1 + /usr/lib/powerpc-apple-darwin10/4.2.1 + /usr/lib + /usr/lib + /usr/local/lib +Framework search paths: + /Library/Frameworks/ + /System/Library/Frameworks/") +set(mac_ppc_gcc_Wlv_libs "") +set(mac_ppc_gcc_Wlv_dirs "/usr/lib/powerpc-apple-darwin10/4.2.1;/usr/lib/gcc/powerpc-apple-darwin10/4.2.1;/usr/lib;/usr/local/lib") +list(APPEND platforms mac_ppc_gcc_Wlv) + # gcc -arch ppc dummy.c -v set(mac_ppc_gcc_text " /usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/collect2 -dynamic -arch ppc -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../../powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../.. /var/tmp//ccdcolsP.o -lgcc -lSystemStubs -lSystem") set(mac_ppc_gcc_libs "") set(mac_ppc_gcc_dirs "/usr/lib/powerpc-apple-darwin10/4.2.1;/usr/lib/gcc/powerpc-apple-darwin10/4.2.1;/usr/lib") list(APPEND platforms mac_ppc_gcc) +# g++ -arch ppc dummy.cxx -v -Wl,-v +set(mac_ppc_g++_Wlv_text " /usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/collect2 -dynamic -arch ppc -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../../powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../.. /var/tmp//ccaFTkwq.o -v -lstdc++ -lgcc -lSystemStubs -lSystem +collect2 version 4.2.1 (Apple Inc. build 5646) (Darwin/PowerPC) +/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/ld -dynamic -arch ppc -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../../powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../.. /var/tmp//ccaFTkwq.o -v -lstdc++ -lgcc -lSystemStubs -lSystem +@(#)PROGRAM:ld PROJECT:ld64-95.2.12 +Library search paths: + /usr/lib/powerpc-apple-darwin10/4.2.1 + /usr/lib/gcc/powerpc-apple-darwin10/4.2.1 + /usr/lib/gcc/powerpc-apple-darwin10/4.2.1 + /usr/lib/powerpc-apple-darwin10/4.2.1 + /usr/lib + /usr/lib + /usr/local/lib +Framework search paths: + /Library/Frameworks/ + /System/Library/Frameworks/") +set(mac_ppc_g++_Wlv_libs "stdc++") +set(mac_ppc_g++_Wlv_dirs "/usr/lib/powerpc-apple-darwin10/4.2.1;/usr/lib/gcc/powerpc-apple-darwin10/4.2.1;/usr/lib;/usr/local/lib") +list(APPEND platforms mac_ppc_g++_Wlv) + # g++ -arch ppc dummy.cxx -v set(mac_ppc_g++_text " /usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/collect2 -dynamic -arch ppc -macosx_version_min 10.6.0 -weak_reference_mismatches non-weak -o a.out -lcrt1.10.5.o -L/usr/lib/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../../powerpc-apple-darwin10/4.2.1 -L/usr/lib/gcc/powerpc-apple-darwin10/4.2.1/../../.. /var/tmp//ccbjB6Lj.o -lstdc++ -lgcc -lSystemStubs -lSystem") set(mac_ppc_g++_libs "stdc++")