Eremey Valetov
145c948804
Add a DJGPP CMake toolchain file and DOS compatibility layer (err.h, fnmatch, getprogname/setprogname) so UC2 builds as a native DOS executable via cross-compilation from Linux. The toolchain works around a baked-in /usr/include in the DJGPP GCC binary by using -I instead of -isystem to ensure DJGPP headers take precedence. Add GitHub Actions CI workflow that builds and smoke-tests on both ubuntu-latest and macos-latest.
35 lines
1.5 KiB
CMake
35 lines
1.5 KiB
CMake
# CMake toolchain file for DJGPP cross-compilation (DOS target)
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#
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# Usage: cmake -B build-dos -DCMAKE_TOOLCHAIN_FILE=cmake/djgpp.cmake
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# cmake --build build-dos
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set(CMAKE_SYSTEM_NAME Generic)
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set(CMAKE_SYSTEM_PROCESSOR i586)
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set(DJGPP_ROOT "/usr/local/djgpp" CACHE PATH "DJGPP installation root")
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set(DJGPP_PREFIX "i586-pc-msdosdjgpp" CACHE STRING "DJGPP toolchain prefix")
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set(CMAKE_C_COMPILER "${DJGPP_ROOT}/bin/${DJGPP_PREFIX}-gcc")
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set(CMAKE_CXX_COMPILER "${DJGPP_ROOT}/bin/${DJGPP_PREFIX}-g++")
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set(CMAKE_ASM_COMPILER "${DJGPP_ROOT}/bin/${DJGPP_PREFIX}-gcc")
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set(CMAKE_AR "${DJGPP_ROOT}/bin/${DJGPP_PREFIX}-ar" CACHE FILEPATH "")
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set(CMAKE_RANLIB "${DJGPP_ROOT}/bin/${DJGPP_PREFIX}-ranlib" CACHE FILEPATH "")
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set(CMAKE_STRIP "${DJGPP_ROOT}/bin/${DJGPP_PREFIX}-strip" CACHE FILEPATH "")
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# This DJGPP cross-compiler has /usr/include baked in and -nostdinc doesn't
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# remove it. Using -I (not -isystem) puts the DJGPP paths before /usr/include
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# so the correct headers are always found first.
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set(_DJGPP_NOSTDINC "-nostdinc -I${DJGPP_ROOT}/lib/gcc/${DJGPP_PREFIX}/12.2.0/include -I${DJGPP_ROOT}/lib/gcc/${DJGPP_PREFIX}/12.2.0/include-fixed -I${DJGPP_ROOT}/${DJGPP_PREFIX}/sys-include")
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set(CMAKE_C_FLAGS_INIT "${_DJGPP_NOSTDINC}")
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set(CMAKE_ASM_FLAGS_INIT "${_DJGPP_NOSTDINC}")
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set(CMAKE_FIND_ROOT_PATH "${DJGPP_ROOT}/${DJGPP_PREFIX}")
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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set(CMAKE_EXECUTABLE_SUFFIX ".exe")
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set(DJGPP TRUE)
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set(DOS TRUE)
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