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92d6126450
The `CMAKE_{EXE,SHARED,MODULE,STATIC}_LINKER_FLAGS` variables are
not language-specific, so multiple languages' toolchains may disagree
about if/how to pass the flag through a compiler driver to the linker.
Furthermore, carrying the flag in public-facing variables allows projects
or users to change it even though it is required. Add policy CMP0197
to remove the flag from the public-facing variables and generate it
automatically instead:
* For command-line generators, add the `-machine:` flag to the
linker and archiver rule variables.
* For Visual Studio generators, we do not need to explicitly add the
link `-machine:` flag. MSBuild automatically adds it, and the new
behavior actually removes a duplicate we generated previously.
Issue: #21934
21 lines
803 B
CMake
21 lines
803 B
CMake
enable_language(C)
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# Make sure the compile command is not hidden.
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string(REPLACE "${CMAKE_START_TEMP_FILE}" "" CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
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string(REPLACE "${CMAKE_END_TEMP_FILE}" "" CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
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cmake_policy(GET CMP0197 cmp0197)
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foreach(t EXE SHARED MODULE STATIC)
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if(cmp0197 STREQUAL "NEW")
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if("${CMAKE_${t}_LINKER_FLAGS}" MATCHES "([/-][Mm][Aa][Cc][Hh][Ii][Nn][Ee]:)")
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message(SEND_ERROR "CMAKE_${t}_LINKER_FLAGS has '${CMAKE_MATCH_1}' under NEW behavior")
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endif()
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else()
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if(NOT " ${CMAKE_${t}_LINKER_FLAGS} " MATCHES "[ ,]/machine:[A-Za-z0-9_]+ ")
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message(SEND_ERROR "CMAKE_${t}_LINKER_FLAGS does not have '/machine:' under OLD behavior")
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endif()
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endif()
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endforeach()
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add_executable(main main.c)
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