Pass include directories with response files to GNU on Windows
The GNU 4.x toolchain on MinGW (and therefore MSYS) allows compiler options to be passed via response files. Use this to pass include directory -I options. This allows the include file search path to be very long despite shell and mingw32-make command line length limits.
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@ -78,6 +78,7 @@ macro(__windows_compiler_gnu lang)
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set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "") # No -fPIC on Windows
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set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "") # No -fPIC on Windows
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set(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS ${__WINDOWS_GNU_LD_RESPONSE})
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set(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS ${__WINDOWS_GNU_LD_RESPONSE})
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set(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_INCLUDES 1)
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# We prefer "@" for response files but it is not supported by gcc 3.
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# We prefer "@" for response files but it is not supported by gcc 3.
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execute_process(COMMAND ${CMAKE_${lang}_COMPILER} --version OUTPUT_VARIABLE _ver ERROR_VARIABLE _ver)
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execute_process(COMMAND ${CMAKE_${lang}_COMPILER} --version OUTPUT_VARIABLE _ver ERROR_VARIABLE _ver)
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@ -91,6 +92,8 @@ macro(__windows_compiler_gnu lang)
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# Use "-Wl,@" to pass the response file to the linker.
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# Use "-Wl,@" to pass the response file to the linker.
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set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "-Wl,@")
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set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "-Wl,@")
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endif()
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endif()
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# The GNU 3.x compilers do not support response files (only linkers).
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set(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_INCLUDES 0)
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elseif(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS)
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elseif(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS)
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# Use "@" to pass the response file to the front-end.
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# Use "@" to pass the response file to the front-end.
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set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "@")
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set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "@")
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