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Allow to generate a compilation database #1064

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merged 1 commit into from
Jan 31, 2021
Merged

Allow to generate a compilation database #1064

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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,8 @@
/node_modules/
aclocal.m4
autom4te.cache
/compile_commands/
/compile_commands.json
config.h
config.h.in
config.log
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44 changes: 42 additions & 2 deletions Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -85,13 +85,52 @@ else
TAR ?= tar
endif

GENERATE_COMPILATION_DATABASE ?= no
ifeq ($(GENERATE_COMPILATION_DATABASE),yes)
compdb_check = $(shell $(CC) $(ALL_CFLAGS) \
-c -MJ /dev/null \
-x c /dev/null -o /dev/null 2>&1; \
echo $$?)
ifneq ($(compdb_check),0)
override GENERATE_COMPILATION_DATABASE = no
$(warning GENERATE_COMPILATION_DATABASE is set to "yes", but your compiler does not \
support generating compilation database entries)
endif
else
ifneq ($(GENERATE_COMPILATION_DATABASE),no)
$(error please set GENERATE_COMPILATION_DATABASE to "yes" or "no" \
(not "$(GENERATE_COMPILATION_DATABASE)"))
endif
endif

compdb_dir = compile_commands
ifeq ($(GENERATE_COMPILATION_DATABASE),yes)
missing_compdb_dir = $(compdb_dir)
$(missing_compdb_dir):
@mkdir -p $@

compdb_file = $(compdb_dir)/$(subst /,-,[email protected])
compdb_args = -MJ $(compdb_file)
else
missing_compdb_dir =
compdb_args =
endif

all: $(EXE) $(TOOLS)
all-debug: all
all-debug: CFLAGS += $(DFLAGS)
doc: $(ALLDOC)
doc-man: $(MANDOC)
doc-html: $(HTMLDOC)

ifeq ($(GENERATE_COMPILATION_DATABASE),yes)
all: compile_commands.json
compile_commands.json:
@rm -f $@
$(QUIET_GEN)sed -e '1s/^/[/' -e '$$s/,$$/]/' $(compdb_dir)/*.o.json > $@+
@if test -s $@+; then mv $@+ $@; else $(RM) $@+; fi
endif

export sysconfdir

install: all
Expand Down Expand Up @@ -139,6 +178,7 @@ uninstall:

clean: clean-test clean-coverage
$(Q)$(RM) -r $(TARNAME) *.spec tig-*.tar.gz tig-*.tar.gz.md5 .deps _book node_modules
$(Q)$(RM) -r $(compdb_dir) compile_commands.json
$(Q)$(RM) $(EXE) $(TOOLS) $(OBJS) core doc/*.xml src/builtin-config.c
$(Q)$(RM) $(OBJS:%.o=%.gcda) $(OBJS:%.o=%.gcno)

Expand Down Expand Up @@ -336,9 +376,9 @@ DEPS_CFLAGS ?= -MMD -MP -MF .deps/$*.d
%: %.o
$(QUIET_LINK)$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@

%.o: %.c $(CONFIG_H)
%.o: %.c $(CONFIG_H) $(missing_compdb_dir)
@mkdir -p .deps/$(*D)
$(QUIET_CC)$(CC) -I. -Iinclude $(CFLAGS) $(DEPS_CFLAGS) $(CPPFLAGS) -c -o $@ $<
$(QUIET_CC)$(CC) -I. -Iinclude $(compdb_args) $(CFLAGS) $(DEPS_CFLAGS) $(CPPFLAGS) -c -o $@ $<

-include $(OBJS:%.o=.deps/%.d)

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