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48 lines
1.8 KiB
48 lines
1.8 KiB
include(RunCMake)
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# Detect the compiler in use in the current environment.
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run_cmake(FindCompiler)
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include(${RunCMake_BINARY_DIR}/FindCompiler-build/cc.cmake)
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if(NOT CMAKE_C_COMPILER)
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message(FATAL_ERROR "FindCompiler provided no compiler!")
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endif()
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if(NOT IS_ABSOLUTE "${CMAKE_C_COMPILER}")
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message(FATAL_ERROR "FindCompiler provided non-absolute path \"${CMAKE_C_COMPILER}\"!")
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endif()
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if(NOT EXISTS "${CMAKE_C_COMPILER}")
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message(FATAL_ERROR "FindCompiler provided non-existing path \"${CMAKE_C_COMPILER}\"!")
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endif()
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# Now that we have the full compiler path, hide CC.
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unset(ENV{CC})
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# Wrap around the real compiler so we can change the compiler
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# path without changing the underlying compiler.
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set(ccIn ${RunCMake_SOURCE_DIR}/cc.sh.in)
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set(cc1 ${RunCMake_BINARY_DIR}/cc1.sh)
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set(cc2 ${RunCMake_BINARY_DIR}/cc2.sh)
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set(cc3 CMAKE_C_COMPILER-NOTFOUND)
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configure_file(${ccIn} ${cc1} @ONLY)
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configure_file(${ccIn} ${cc2} @ONLY)
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block()
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set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/ChangeCompiler-build)
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set(ENV{RunCMake_TEST} "FirstCompiler")
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run_cmake_with_options(FirstCompiler -DCMAKE_C_COMPILER=${cc1})
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set(RunCMake_TEST_NO_CLEAN 1)
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set(ENV{RunCMake_TEST} "SecondCompiler")
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run_cmake_with_options(SecondCompiler -DCMAKE_C_COMPILER=${cc2})
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set(ENV{RunCMake_TEST} "EmptyCompiler")
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run_cmake_with_options(EmptyCompiler -DCMAKE_C_COMPILER=)
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endblock()
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block()
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set(cc1_dot ${RunCMake_BINARY_DIR}/./cc1.sh)
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set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/CompilerPath-build)
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set(RunCMake_TEST_VARIANT_DESCRIPTION "-step1")
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run_cmake_with_options(CompilerPath "-DCMAKE_C_COMPILER=${cc1_dot}" -DCACHE_ENTRY=cached)
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set(RunCMake_TEST_NO_CLEAN 1)
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set(RunCMake_TEST_VARIANT_DESCRIPTION "-step2")
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run_cmake_with_options(CompilerPath "-DCMAKE_C_COMPILER=${cc1_dot}")
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endblock()
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