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https://github.com/RIOT-OS/RIOT.git
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56 lines
2.3 KiB
Makefile
56 lines
2.3 KiB
Makefile
export GDBPREFIX ?= $(PREFIX)
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export LLVMPREFIX ?= llvm-
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export CC = clang
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export CXX = clang++
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export LINK = $(CC)
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export AS = $(LLVMPREFIX)as
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export AR = $(LLVMPREFIX)ar
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export NM = $(LLVMPREFIX)nm
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# There is no LLVM linker yet, use GNU binutils.
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#export LINKER = $(LLVMPREFIX)ld
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# objcopy does not have a clear substitute in LLVM, use GNU binutils
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#export OBJCOPY = $(LLVMPREFIX)objcopy
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export OBJCOPY = $(PREFIX)objcopy
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export OBJDUMP = $(LLVMPREFIX)objdump
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export SIZE = $(LLVMPREFIX)size
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export DBG = $(GDBPREFIX)gdb
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# LLVM lacks a binutils strip tool as well...
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#export STRIP = $(LLVMPREFIX)strip
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# Clang on Linux uses GCC's C++ headers and libstdc++ (installed with GCC)
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# Ubuntu and Debian use /etc/alternatives/gcc-$(TARGET_ARCH)-include/c++/$(GCC_VERSION)
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# Arch uses /usr/$(TARGET_ARCH)/include/c++/$(GCC_VERSION)
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# Gentoo uses /usr/lib/gcc/$(TARGET_ARCH)/$(GCC_VERSION)/include/g++-v5
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GCC_CXX_INCLUDE_PATTERNS ?= \
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/etc/alternatives/gcc-$(TARGET_ARCH)-include/c++/*/ \
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/usr/$(TARGET_ARCH)/include/c++/*/ \
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/usr/lib/gcc/$(TARGET_ARCH)/*/include/g++-v5 \
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#
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# Try to find the proper multilib directory using GCC, this may fail if a cross-
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# GCC is not installed.
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ifeq ($(GCC_MULTI_DIR),)
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GCC_MULTI_DIR := $(shell $(PREFIX)gcc -print-multi-directory $(CFLAGS) 2>/dev/null)
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endif
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# Tell clang to cross compile
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export CFLAGS += -target $(TARGET_ARCH)
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export CXXFLAGS += -target $(TARGET_ARCH)
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export LINKFLAGS += -target $(TARGET_ARCH)
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# Use the wildcard Makefile function to search for existing directories matching
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# the patterns above. We use the -isystem gcc/clang argument to add the include
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# directories as system include directories, which means they will not be
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# searched until after all the project specific include directories (-I/path)
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# We sort the list of found directories and take the last one, it will likely be
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# the most recent GCC version. This avoids using old headers left over from
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# previous tool chain installations.
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GCC_CXX_INCLUDES ?= \
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$(addprefix \
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-isystem $(lastword $(sort \
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$(foreach pat, $(GCC_CXX_INCLUDE_PATTERNS), $(wildcard $(pat))))), \
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/. /$(TARGET_ARCH)/$(GCC_MULTI_DIR) /backward \
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)
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export INCLUDES += $(GCC_CXX_INCLUDES)
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