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cmake: Split toolchain configuration into pre-and post-DT

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Split up the toolchain configuration into two phases, generic and
target. The 'generic' phase configures the toolchain just enough to be
able to preprocess DT files. The 'target' phase completes the
configuration with target-specific configuration.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
This commit is contained in:
Sebastian Bøe 2018-12-13 16:32:07 +01:00 • committed by Carles Cufí
commit a0a63ac344
26 changed files with 151 additions and 96 deletions
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52
cmake/compiler/clang/target.cmake Normal file
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@ -0,0 +1,52 @@
# Configuration for host installed llvm
#
set(NOSTDINC "")
# Note that NOSYSDEF_CFLAG may be an empty string, and
# set_ifndef() does not work with empty string.
if(NOT DEFINED NOSYSDEF_CFLAG)
set(NOSYSDEF_CFLAG -undef)
endif()
find_program(CMAKE_C_COMPILER clang PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_CXX_COMPILER clang++ PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_AR llvm-ar PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_LINKER llvm-link PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_NM llvm-nm PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_OBJDUMP llvm-objdump PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_RANLIB llvm-ranlib PATH ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
find_program(CMAKE_OBJCOPY objcopy PATH ${TOOLCHAIN_HOME})
find_program(CMAKE_READELF readelf PATH ${TOOLCHAIN_HOME})
foreach(file_name include include-fixed)
execute_process(
COMMAND ${CMAKE_C_COMPILER} --print-file-name=${file_name}
OUTPUT_VARIABLE _OUTPUT
)
string(REGEX REPLACE "\n" "" _OUTPUT ${_OUTPUT})
list(APPEND NOSTDINC ${_OUTPUT})
endforeach()
foreach(isystem_include_dir ${NOSTDINC})
list(APPEND isystem_include_flags -isystem ${isystem_include_dir})
endforeach()
execute_process(
COMMAND ${CMAKE_C_COMPILER} ${TOOLCHAIN_C_FLAGS} --print-libgcc-file-name
OUTPUT_VARIABLE LIBGCC_FILE_NAME
OUTPUT_STRIP_TRAILING_WHITESPACE
)
assert_exists(LIBGCC_FILE_NAME)
get_filename_component(LIBGCC_DIR ${LIBGCC_FILE_NAME} DIRECTORY)
assert_exists(LIBGCC_DIR)
list(APPEND LIB_INCLUDE_DIR "-L\"${LIBGCC_DIR}\"")
list(APPEND TOOLCHAIN_LIBS gcc)
set(CMAKE_REQUIRED_FLAGS -nostartfiles -nostdlib ${isystem_include_flags} -Wl,--unresolved-symbols=ignore-in-object-files)
string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")