| # CROSS_COMPILE_$(sm) is derived from CROSS_COMPILE/CROSS_COMPILE32/ |
| # CROSS_COMPILE64 and indicates the target that should be passed to clang. Path |
| # components are ignored, as well as any command before the compiler name (for |
| # instance "/some/path/ccache /other/path/arm-linux-gnueabihf-"). |
| # We try to extract any ccache command if present. |
| clang-target := $(patsubst %-,%,$(notdir $(lastword $(CROSS_COMPILE_$(sm))))) |
| ccache-cmd := $(if $(findstring ccache,$(CROSS_COMPILE_$(sm))),$(firstword $(CROSS_COMPILE_$(sm))) ,) |
| |
| CC$(sm) := $(ccache-cmd)clang --target=$(clang-target) |
| CPP$(sm) := $(ccache-cmd)clang-cpp --target=$(clang-target) |
| LD$(sm) := $(ccache-cmd)ld.lld |
| |
| ifeq ($(sm)-$(CFG_WITH_PAGER),core-y) |
| # Workaround an issue with all_objs.o and unpaged.o when CFG_WITH_PAGER=y: |
| # ld.ldd merges .text.* sections into .text, even though the linker script does |
| # not tell to do so. --relocatable would avoid that, but is not compatible with |
| # --gc-sections. A trivial patch to ld.lld can fix the issue (in |
| # lld/ELF/Writer.cpp, change elf::getOutputSectionName() to always return |
| # s->name) so perhaps a new command line option could be proposed upstream? |
| # Anyway, use GNU.ld for the moment. |
| LDcore := $(CROSS_COMPILE_$(sm))ld |
| endif |
| |
| AR$(sm) := $(ccache-cmd)llvm-ar |
| NM$(sm) := llvm-nm |
| OBJCOPY$(sm) := llvm-objcopy |
| |
| # llvm-objdump: |
| # - Does not support mixed 32-bit ARM and Thumb instructions |
| # - Has a poorer output than the binutils version (static functions not shown, |
| # for instance). |
| # Rely on the GNU binutils version instead (if available). |
| binutils-objdump = $(CROSS_COMPILE_$(sm))objdump |
| ifneq (,$(filter GNU,$(shell $(binutils-objdump) -v 2>&1))) |
| OBJDUMP$(sm) := $(binutils-objdump) |
| else |
| OBJDUMP$(sm) := echo "Warning: binutils objdump not found, file will be empty" >&2; true |
| endif |
| |
| READELF$(sm) := llvm-readelf |
| |
| nostdinc$(sm) := -nostdinc -isystem $(shell $(CC$(sm)) \ |
| -print-file-name=include 2> /dev/null) |
| |
| comp-cflags-warns-clang := -Wno-language-extension-token \ |
| -Wno-gnu-zero-variadic-macro-arguments |
| |
| libgcc$(sm) := |
| |
| # Define these to something to discover accidental use |
| CC := false |
| CPP := false |
| LD := false |
| AR := false |
| NM := false |
| OBJCOPY := false |
| OBJDUMP := false |
| READELF := false |
| nostdinc := --bad-nostdinc-variable |
| libgcc := --bad-libgcc-variable |
| |
