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if(UNIX AND "${CMAKE_GENERATOR}" MATCHES "Makefile" AND
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NOT CMake_TEST_NO_FindPackageModeMakefileTest)
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# Test whether the make is GNU make, and only add the test in this case,
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# since the configured makefile in this test uses $(shell ...), which
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# is AFAIK a GNU make extension. Alex
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execute_process(COMMAND ${CMAKE_MAKE_PROGRAM} -v
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OUTPUT_VARIABLE makeVersionOutput
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ERROR_QUIET
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TIMEOUT 10)
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string(TOUPPER "${makeVersionOutput}" MAKE_VERSION_OUTPUT)
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if("${MAKE_VERSION_OUTPUT}" MATCHES "GNU MAKE")
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# build a library which we can search during the test
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add_library(foo STATIC foo.cpp)
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# configure a FindFoo.cmake so it knows where the library can be found
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configure_file(FindFoo.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/FindFoo.cmake @ONLY)
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# Need the -isysroot flag on recentish macOS after command line tools
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# no longer provide headers in /usr/include
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if(APPLE AND CMAKE_OSX_SYSROOT)
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set(__EXTRA_OSX_SYSROOT_FLAGS "-isysroot ${CMAKE_OSX_SYSROOT}")
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else()
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set(__EXTRA_OSX_SYSROOT_FLAGS "")
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endif()
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# now set up the test:
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file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/cmakeExecutable.mk"
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CONTENT "CMAKE = \"$<TARGET_FILE:cmake>\"\n"
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)
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Makefile.in ${CMAKE_CURRENT_BINARY_DIR}/ConfMakefile @ONLY)
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configure_file(${CMAKE_CURRENT_SOURCE_DIR}/main.cpp ${CMAKE_CURRENT_BINARY_DIR}/main.cpp COPYONLY)
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add_test(FindPackageModeMakefileTest ${CMAKE_MAKE_PROGRAM} -f ${CMAKE_CURRENT_BINARY_DIR}/ConfMakefile )
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endif()
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endif()
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