mirror of
https://github.com/eclipse-threadx/threadx.git
synced 2026-10-06 06:59:08 +08:00
Frédéric Desbiens
5a68c9da4b
cmake/linux.cmake set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER unconditionally. CMake reads a toolchain file before it consults CC and CXX, and a plain set() in a toolchain file also takes precedence over -DCMAKE_C_COMPILER, so neither of the two usual ways to pick a compiler had any effect: the tree could only ever be built with whatever /usr/bin/gcc happened to point at. That matters because AGENTS.md names GCC 14 as the project's default compiler on Linux, while distributions still ship an older gcc as the default for some time. Selecting GCC 14 previously meant either editing this file or changing the machine's system-wide default. Both variables now fall back to gcc and g++ only when nothing else has been specified, so the default build is byte-for-byte what it was, while -DCMAKE_C_COMPILER=gcc-14 or CC=gcc-14 now work as expected. The binutils variables in this file are left alone: they are unused on the Linux target, so guarding them would be unrelated churn. Assisted-by: Claude Code (Opus 5)
49 lines
1.9 KiB
CMake
49 lines
1.9 KiB
CMake
set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_PROCESSOR x86_64)
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# Let the compiler be chosen on the command line or from the environment, for example
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# -DCMAKE_C_COMPILER=gcc-14 or CC=gcc-14. CMake reads a toolchain file before it consults
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# CC and CXX, so setting these unconditionally would quietly override both and leave no
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# way to build with anything but the distribution's default gcc.
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if(NOT DEFINED CMAKE_C_COMPILER)
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if(DEFINED ENV{CC})
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set(CMAKE_C_COMPILER $ENV{CC})
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else()
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set(CMAKE_C_COMPILER gcc)
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endif()
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endif()
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if(NOT DEFINED CMAKE_CXX_COMPILER)
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if(DEFINED ENV{CXX})
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set(CMAKE_CXX_COMPILER $ENV{CXX})
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else()
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set(CMAKE_CXX_COMPILER g++)
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endif()
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endif()
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set(AS as)
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set(AR ar)
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set(OBJCOPY objcopy)
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set(OBJDUMP objdump)
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set(SIZE size)
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set(THREADX_ARCH "linux")
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set(THREADX_TOOLCHAIN "gnu")
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set(LINUX_FLAGS "-g -pthread")
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set(CMAKE_C_FLAGS "${LINUX_FLAGS} " CACHE INTERNAL "c compiler flags")
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set(CMAKE_CXX_FLAGS "${LINUX_FLAGS} -fno-rtti -fno-exceptions" CACHE INTERNAL "cxx compiler flags")
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set(CMAKE_ASM_FLAGS "${LINUX_FLAGS} -x assembler-with-cpp" CACHE INTERNAL "asm compiler flags")
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set(CMAKE_EXE_LINKER_FLAGS "${LINUX_FLAGS} ${LD_FLAGS} -Wl,--gc-sections" CACHE INTERNAL "exe link flags")
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SET(CMAKE_C_FLAGS_DEBUG "-Og -g -ggdb3" CACHE INTERNAL "c debug compiler flags")
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SET(CMAKE_CXX_FLAGS_DEBUG "-Og -g -ggdb3" CACHE INTERNAL "cxx debug compiler flags")
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SET(CMAKE_ASM_FLAGS_DEBUG "-g -ggdb3" CACHE INTERNAL "asm debug compiler flags")
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SET(CMAKE_C_FLAGS_RELEASE "-O3" CACHE INTERNAL "c release compiler flags")
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SET(CMAKE_CXX_FLAGS_RELEASE "-O3" CACHE INTERNAL "cxx release compiler flags")
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SET(CMAKE_ASM_FLAGS_RELEASE "" CACHE INTERNAL "asm release compiler flags")
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# this makes the test compiles use static library option so that we don't need to pre-set linker flags and scripts
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set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
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