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42 lines
998 B
Makefile
42 lines
998 B
Makefile
PRECOMPILE_HEADERS ?= 0
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print-var-help += \
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echo " PRECOMPILE_HEADERS ($(PRECOMPILE_HEADERS)): Whether to use precompiled headers to speed up the build";
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GCH = $(buildprefix)precompiled-headers.h.gch
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$(GCH): precompiled-headers.h
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@rm -f $@
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@mkdir -p "$(dir $@)"
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$(trace-gen) $(CXX) -x c++-header -o $@ $< $(GLOBAL_CXXFLAGS) $(GCH_CXXFLAGS)
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PCH = $(buildprefix)precompiled-headers.h.pch
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$(PCH): precompiled-headers.h
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@rm -f $@
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@mkdir -p "$(dir $@)"
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$(trace-gen) $(CXX) -x c++-header -o $@ $< $(GLOBAL_CXXFLAGS) $(GCH_CXXFLAGS)
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clean-files += $(GCH) $(PCH)
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ifeq ($(PRECOMPILE_HEADERS), 1)
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ifeq ($(findstring g++,$(CXX)), g++)
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GLOBAL_CXXFLAGS_PCH += -include $(buildprefix)precompiled-headers.h -Winvalid-pch
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GLOBAL_ORDER_AFTER += $(GCH)
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else ifeq ($(findstring clang++,$(CXX)), clang++)
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GLOBAL_CXXFLAGS_PCH += -include-pch $(PCH) -Winvalid-pch
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GLOBAL_ORDER_AFTER += $(PCH)
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else
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$(error Don't know how to precompile headers on $(CXX))
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endif
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endif
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