94 lines
3.5 KiB
Makefile
94 lines
3.5 KiB
Makefile
#
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# This file is part of the LibreOffice project.
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#
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# Make sure variables in this Makefile do not conflict with other variables (e.g. from gbuild).
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# You may occassionally want to override some of these
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# Compile flags ('make CLANGCXXFLAGS=-g' if you need to debug the plugin)
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CLANGCXXFLAGS=-O2 -Wall -Wextra -g
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# The uninteresting rest.
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# Clang headers require these.
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CLANGDEFS=-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fno-rtti
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# All include locations needed.
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CLANGINCLUDES=-isystem $(CLANGDIR)/include -isystem $(CLANGDIR)/tools/clang/include -isystem $(CLANGBUILD)/include -isystem $(CLANGBUILD)/tools/clang/include
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# Clang/LLVM libraries are intentionally not linked in, they are usually built as static libraries, which means the resulting
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# plugin would be big (even though the clang binary already includes it all) and it'd be necessary to explicitly specify
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# also all the dependency libraries.
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CLANGINDIR=$(SRCDIR)/compilerplugins/clang
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# Cannot use $(WORKDIR), the plugin should survive even 'make clean', otherwise the rebuilt
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# plugin will cause cache misses with ccache.
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CLANGOUTDIR=$(BUILDDIR)/compilerplugins/obj
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QUIET=$(if $(VERBOSE)$(verbose),,@)
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ifneq ($(EXTERNAL_WARNINGS_NOT_ERRORS),TRUE)
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CLANGWERROR := -Werror
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endif
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compilerplugins: compilerplugins-build
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# The list of source files, generated automatically (all files in clang/, but not subdirs).
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CLANGSRC=$(foreach src,$(wildcard $(CLANGINDIR)/*.cxx), $(notdir $(src)))
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# Remember the sources and if they have changed, force plugin relinking.
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CLANGSRCCHANGED= \
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$(shell mkdir -p $(CLANGOUTDIR) ; \
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echo $(CLANGSRC) | sort > $(CLANGOUTDIR)/sources-new.txt; \
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if diff $(CLANGOUTDIR)/sources.txt $(CLANGOUTDIR)/sources-new.txt >/dev/null 2>/dev/null; then \
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echo 0; \
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else \
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mv $(CLANGOUTDIR)/sources-new.txt $(CLANGOUTDIR)/sources.txt; \
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echo 1; \
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fi; \
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)
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ifeq ($(CLANGSRCCHANGED),1)
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.PHONY: CLANGFORCE
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CLANGFORCE:
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$(CLANGOUTDIR)/plugin.so: CLANGFORCE
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endif
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# Make the .so also explicitly depend on the sources list, to force update in case CLANGSRCCHANGED was e.g. during 'make clean'.
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$(CLANGOUTDIR)/plugin.so: $(CLANGOUTDIR)/sources.txt
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$(CLANGOUTDIR)/sources.txt:
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touch $@
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compilerplugins-build: $(CLANGOUTDIR) $(CLANGOUTDIR)/plugin.so
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compilerplugins-clean:
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rm -rf $(CLANGOUTDIR)
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$(CLANGOUTDIR):
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mkdir -p $(CLANGOUTDIR)
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CLANGOBJS=
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define clangbuildsrc
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$(3): $(2) $(SRCDIR)/compilerplugins/Makefile-clang.mk $(CLANGOUTDIR)/clang-timestamp
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@echo [build CXX] $(subst $(SRCDIR)/,,$(2))
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$(QUIET)$(CXX) $(CLANGCXXFLAGS) $(CLANGWERROR) $(CLANGDEFS) $(CLANGINCLUDES) -I$(BUILDDIR)/config_host $(2) -fPIC $(CXXFLAGS_CXX11) -c -o $(3) -MMD -MT $(3) -MP -MF $(CLANGOUTDIR)/$(1).d
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-include $(CLANGOUTDIR)/$(1).d
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$(CLANGOUTDIR)/plugin.so: $(3)
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$(CLANGOUTDIR)/plugin.so: CLANGOBJS += $(3)
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endef
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$(foreach src, $(CLANGSRC), $(eval $(call clangbuildsrc,$(src),$(CLANGINDIR)/$(src),$(CLANGOUTDIR)/$(src:.cxx=.o))))
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$(CLANGOUTDIR)/plugin.so: $(CLANGOBJS)
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@echo [build LNK] $(subst $(BUILDDIR)/,,$@)
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$(QUIET)$(CXX) -shared $(CLANGOBJS) -o $@
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# Clang most probably doesn't maintain binary compatibility, so rebuild when clang changes.
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$(CLANGOUTDIR)/clang-timestamp: $(CLANGDIR)/bin/clang
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$(QUIET)touch $@
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# vim: set noet sw=4 ts=4:
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