lix/mk/precompiled-headers.mk
Eelco Dolstra b4db315a56 mk/precompiled-headers.mk: Fix clang test
"clang++" includes the string "g++" so this test didn't work
properly. However the separate handling of clang might not be needed
anymore...
2020-10-06 13:26:00 +02:00

43 lines
998 B
Makefile

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