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now using multilib concept which makes everything much cleaner and clearer

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This commit is contained in:
Hardy Griech 2025-10-30 07:30:03 +01:00
parent fe941af87f
commit 9624ce6117
3 changed files with 28 additions and 66 deletions
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5
cmake/preload/toolchains/pico_arm_cortex_m0plus_clang.cmake
View file

@ -1,8 +1,5 @@
set(CMAKE_SYSTEM_PROCESSOR cortex-m0plus)
# these are all the directories under LLVM embedded toolchain for ARM (newlib or pibolibc) and under llvm_libc
set(PICO_CLANG_RUNTIMES armv6m_soft_nofp armv6m_soft_nofp_size armv6m-unknown-none-eabi)
set(PICO_COMMON_LANG_FLAGS "--target=armv6m-none-eabi -mfloat-abi=soft -march=armv6m")
set(PICO_COMMON_LANG_FLAGS "--target=arm-none-eabi -mcpu=cortex-m0plus -mfloat-abi=soft")
include(${CMAKE_CURRENT_LIST_DIR}/util/pico_arm_clang_common.cmake)

6
cmake/preload/toolchains/pico_arm_cortex_m33_clang.cmake
View file

@ -1,8 +1,6 @@
set(CMAKE_SYSTEM_PROCESSOR cortex-m33)
# these are all the directories under LLVM embedded toolchain for ARM (newlib or pibolibc) and under llvm_libc
set(PICO_CLANG_RUNTIMES armv8m.main_soft_nofp armv8m.main_soft_nofp_unaligned armv8m.main_soft_nofp_unaligned_size armv8m.main-unknown-none-eabi)
set(PICO_COMMON_LANG_FLAGS "-mcpu=cortex-m33 --target=armv8m.main-none-eabi -mfloat-abi=softfp -march=armv8m.main+fp+dsp")
set(PICO_COMMON_LANG_FLAGS "--target=arm-none-eabi -mfloat-abi=hard -march=armv8m.main+fp+dsp")
set(PICO_DISASM_OBJDUMP_ARGS --mcpu=cortex-m33 --arch=armv8m.main+fp+dsp)
include(${CMAKE_CURRENT_LIST_DIR}/util/pico_arm_clang_common.cmake)

81
cmake/preload/toolchains/util/pico_arm_clang_common.cmake
View file

@ -44,81 +44,48 @@ endforeach()
list(APPEND CMAKE_TRY_COMPILE_PLATFORM_VARIABLES PICO_CLIB)
set(_CLANG_RUNTIMES_DIR "${PICO_COMPILER_DIR}/../lib/clang-runtimes")
set(_PICO_CLIB_PATH "${_CLANG_RUNTIMES_DIR}/arm-none-eabi")
cmake_path(NORMAL_PATH _CLANG_RUNTIMES_DIR)
set(PICO_CLIB_ROOT "${_CLANG_RUNTIMES_DIR}")
if(NOT PICO_CLIB OR PICO_CLIB STREQUAL "" OR PICO_CLIB STREQUAL "newlib")
# newlib is 1st class choice
if(EXISTS "${_CLANG_RUNTIMES_DIR}/newlib/arm-none-eabi")
set(_PICO_CLIB_PATH "${_CLANG_RUNTIMES_DIR}/newlib/arm-none-eabi")
if(NOT PICO_CLIB OR PICO_CLIB STREQUAL "")
# newlib is primary if no clib specified
if(EXISTS "${_CLANG_RUNTIMES_DIR}/newlib")
set(PICO_CLIB "newlib")
else()
set(PICO_CLIB "picolibc")
endif()
set(CACHE{PICO_CLIB} TYPE STRING FORCE VALUE ${PICO_CLIB})
endif()
if(PICO_CLIB STREQUAL "newlib")
if(EXISTS "${_CLANG_RUNTIMES_DIR}/newlib")
set(PICO_CLIB_ROOT "${_CLANG_RUNTIMES_DIR}/newlib")
endif()
elseif(PICO_CLIB STREQUAL "llvm_libc")
if(EXISTS "${_CLANG_RUNTIMES_DIR}/llvmlibc/arm-none-eabi")
set(_PICO_CLIB_PATH "${_CLANG_RUNTIMES_DIR}/llvmlibc/arm-none-eabi")
if(EXISTS "${_CLANG_RUNTIMES_DIR}/llvmlibc")
set(PICO_CLIB_ROOT "${_CLANG_RUNTIMES_DIR}/llvmlibc")
endif()
elseif(PICO_CLIB STREQUAL "picolibc")
if(EXISTS "${_CLANG_RUNTIMES_DIR}/picolibc/arm-none-eabi")
set(_PICO_CLIB_PATH "${_CLANG_RUNTIMES_DIR}/picolibc/arm-none-eabi")
if(EXISTS "${_CLANG_RUNTIMES_DIR}/picolibc")
set(PICO_CLIB_ROOT "${_CLANG_RUNTIMES_DIR}/picolibc")
endif()
else()
message(FATAL_ERROR "PICO_CLIB must be one of newlib, picolib, llvm_libc or empty (but is '${PICO_CLIB}')")
endif()
foreach(PICO_CLANG_RUNTIME IN LISTS PICO_CLANG_RUNTIMES)
# LLVM embedded-toolchain for ARM style
find_path(PICO_COMPILER_SYSROOT NAMES lib/libc.a
HINTS
${_PICO_CLIB_PATH}/${PICO_CLANG_RUNTIME}
${_CLANG_RUNTIMES_DIR}/${PICO_CLANG_RUNTIME}
)
if (PICO_COMPILER_SYSROOT)
if (NOT PICO_CLIB)
# this is a bit of a hack; to try to autodetect the C library used:
# `picolibc.h` seems to exist on the newer versions of LLVM embedded toolchain for ARM using picolibc whereas
# `newlib.h` appears in all versions, so isn't very useful
if (EXISTS "${PICO_COMPILER_SYSROOT}/include/picolibc.h")
message("Setting default C library to picolibc as LLVM appears to be using it")
set(PICO_CLIB "picolibc" CACHE INTERNAL "")
endif()
endif()
break()
endif()
# llvm_libc style
find_path(PICO_COMPILER_SYSROOT NAMES stdio.h
HINTS
${PICO_COMPILER_DIR}/../include/${PICO_CLANG_RUNTIME}
)
if (PICO_COMPILER_SYSROOT)
if (NOT PICO_CLIB)
message("Setting default C library to llvm_libc as LLVM appears to be using it")
set(PICO_CLIB "llvm_libc" CACHE INTERNAL "")
endif()
break()
endif()
endforeach()
if (NOT PICO_COMPILER_SYSROOT)
message(FATAL_ERROR "Could not find an llvm runtime for '${PICO_CLANG_RUNTIME}'")
endif()
set(PICO_COMMON_LANG_FLAGS "${PICO_COMMON_LANG_FLAGS} --sysroot ${PICO_COMPILER_SYSROOT}")
# add some system includes due to structure of ATfE-21.1.1 header structure
# required for llvmlibc / newlib, NOT for picolibc
if(EXISTS "${PICO_COMPILER_SYSROOT}/../include/c++/v1")
set(PICO_COMMON_LANG_FLAGS "${PICO_COMMON_LANG_FLAGS} -isystem ${PICO_COMPILER_SYSROOT}/../include/c++/v1")
endif()
if(EXISTS "${PICO_COMPILER_SYSROOT}/../include")
set(PICO_COMMON_LANG_FLAGS "${PICO_COMMON_LANG_FLAGS} -isystem ${PICO_COMPILER_SYSROOT}/../include")
endif()
set(PICO_COMMON_LANG_FLAGS "${PICO_COMMON_LANG_FLAGS} --sysroot ${PICO_CLIB_ROOT}")
# moving this here as a reminder from pico_standard_link; it was commented out theee, but if ever needed,
# it belongs here as part of LINKER_FLAGS_INIT
#target_link_options(pico_standard_link INTERFACE "LINKER:-fuse-ld=lld")
if (PICO_CLIB STREQUAL "llvm_libc")
# TODO: Remove -nostdlib++ once we include libc++ in the toolchain.
# TODO: Move -nostartfiles to the appropriate library.
foreach(TYPE IN ITEMS EXE SHARED MODULE)
set(CMAKE_${TYPE}_LINKER_FLAGS_INIT "-nostdlib++ -nostartfiles")
set(CMAKE_${TYPE}_LINKER_FLAGS_INIT "-nostartfiles")
endforeach()
endif()
message(STATUS "Taking '${PICO_CLIB}' from '${PICO_CLIB_ROOT}'")
include(${CMAKE_CURRENT_LIST_DIR}/set_flags.cmake)