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38 lines
1.0 KiB
Makefile
38 lines
1.0 KiB
Makefile
# Select whether to use clang or gcc
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# Priority
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# 1. If -DUSE_GCC or -DUSE_CLANG on command line (but not both) use the requested compiler.
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# 2. If one compiler is installed but not the other, use the installed compiler.
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# 3. Use clang
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EXISTS_GCC := $(shell command -v gcc)
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EXISTS_CLANG := $(shell command -v clang)
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ifeq ($(or $(EXISTS_GCC),$(EXISTS_CLANG)),)
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$(error "Cannot find compiler: neither gcc nor clang. Exiting.")
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endif
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COMPILER :=
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ifeq ($(USE_COMPILER),clang)
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ifeq ($(EXISTS_CLANG),)
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$(error "USE_COMPILER=clang, but cannot find the clang compiler. Exiting")
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endif
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COMPILER := clang
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else ifeq ($(USE_COMPILER),gcc)
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ifeq ($(EXISTS_GCC),)
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$(error "USE_COMPILER=gcc given, but cannot find the gcc compiler. Exiting")
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endif
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COMPILER := gcc
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else ifneq ($(EXISTS_CLANG),)
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COMPILER := clang
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else
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COMPILER := gcc
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endif
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ifeq ($(COMPILER),)
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$(error "Oops. Trying to select gcc or clang but should never get here")
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endif
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ifeq ($(COMPILER),gcc)
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CC := gcc $(GCC_CFLAGS)
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else
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CC := clang $(CLANG_CFLAGS)
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endif
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