compilerplugins/Makefile-clang.mk

   1 #
   2 # This file is part of the LibreOffice project.
   3 #
   4 # This Source Code Form is subject to the terms of the Mozilla Public
   5 # License, v. 2.0. If a copy of the MPL was not distributed with this
   6 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7 #
   8
   9 # Make sure variables in this Makefile do not conflict with other variables (e.g. from gbuild).
  10
  11 # You may occassionally want to override some of these
  12
  13 # Compile flags ('make CLANGCXXFLAGS=-g' if you need to debug the plugin)
  14 CLANGCXXFLAGS=-O2 -Wall -Wextra -g
  15
  16 QUIET=$(if $(VERBOSE)$(verbose),,@)
  17
  18 # The uninteresting rest.
  19
  20 # Clang headers require these.
  21 CLANGDEFS=-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fno-rtti
  22 # All include locations needed.
  23 CLANGINCLUDES=-I$(CLANGDIR)/include -I$(CLANGDIR)/tools/clang/include -I$(CLANGBUILD)/include -I$(CLANGBUILD)/tools/clang/include
  24
  25 # Clang/LLVM libraries are intentionally not linked in, they are usually built as static libraries, which means the resulting
  26 # plugin would be big (even though the clang binary already includes it all) and it'd be necessary to explicitly specify
  27 # also all the dependency libraries.
  28
  29 CLANGINDIR=$(SRCDIR)/compilerplugins/clang
  30 # Cannot use $(WORKDIR), the plugin should survive even 'make clean', otherwise the rebuilt
  31 # plugin will cause cache misses with ccache.
  32 CLANGOUTDIR=$(BUILDDIR)/compilerplugins/obj
  33
  34 compilerplugins: compilerplugins-build
  35
  36 # The list of source files, generated automatically (all files in clang/, but not subdirs).
  37 CLANGSRC=$(foreach src,$(wildcard $(CLANGINDIR)/*.cxx), $(notdir $(src)))
  38 # Remember the sources and if they have changed, force plugin relinking.
  39 CLANGSRCCHANGED= \
  40     $(shell mkdir -p $(CLANGOUTDIR) ; \
  41             echo $(CLANGSRC) | sort > $(CLANGOUTDIR)/sources-new.txt; \
  42             if diff $(CLANGOUTDIR)/sources.txt $(CLANGOUTDIR)/sources-new.txt >/dev/null 2>/dev/null; then \
  43                 echo 0; \
  44             else \
  45                 mv $(CLANGOUTDIR)/sources-new.txt $(CLANGOUTDIR)/sources.txt; \
  46                 echo 1; \
  47             fi; \
  48     )
  49 ifeq ($(CLANGSRCCHANGED),1)
  50 .PHONY: CLANGFORCE
  51 CLANGFORCE:
  52 $(CLANGOUTDIR)/plugin.so: CLANGFORCE
  53 endif
  54 # Make the .so also explicitly depend on the sources list, to force update in case CLANGSRCCHANGED was e.g. during 'make clean'.
  55 $(CLANGOUTDIR)/plugin.so: $(CLANGOUTDIR)/sources.txt
  56 $(CLANGOUTDIR)/sources.txt:
  57         touch $@
  58
  59 compilerplugins-build: $(CLANGOUTDIR) $(CLANGOUTDIR)/plugin.so
  60
  61 compilerplugins-clean:
  62         rm -rf $(CLANGOUTDIR)
  63
  64 $(CLANGOUTDIR):
  65         mkdir -p $(CLANGOUTDIR)
  66
  67 CLANGOBJS=
  68
  69 define clangbuildsrc
  70 $(3): $(2) $(SRCDIR)/compilerplugins/Makefile-clang.mk $(CLANGOUTDIR)/clang-timestamp
  71         @echo [build CXX] $(subst $(SRCDIR)/,,$(2))
  72         $(QUIET)$(CXX) $(CLANGCXXFLAGS) $(CLANGDEFS) $(CLANGINCLUDES) -I$(BUILDDIR)/config_host $(2) -fPIC -std=c++11 -c -o $(3) -MMD -MT $(3) -MP -MF $(CLANGOUTDIR)/$(1).d
  73
  74 -include $(CLANGOUTDIR)/$(1).d
  75
  76 $(CLANGOUTDIR)/plugin.so: $(3)
  77 $(CLANGOUTDIR)/plugin.so: CLANGOBJS += $(3)
  78 endef
  79
  80 $(foreach src, $(CLANGSRC), $(eval $(call clangbuildsrc,$(src),$(CLANGINDIR)/$(src),$(CLANGOUTDIR)/$(src:.cxx=.o))))
  81
  82 $(CLANGOUTDIR)/plugin.so: $(CLANGOBJS)
  83         @echo [build LNK] $(subst $(BUILDDIR)/,,$@)
  84         $(QUIET)$(CXX) -shared $(CLANGOBJS) -o $@
  85
  86 # Clang most probably doesn't maintain binary compatibility, so rebuild when clang changes.
  87 $(CLANGOUTDIR)/clang-timestamp: $(CLANGDIR)/bin/clang
  88         $(QUIET)touch $@
  89
  90 # vim: set noet sw=4 ts=4: