Add a target to use the gcc-generated makefile snippets for dependencies on header files to check the hard-coded dependencies. With this patch applied, if any dependencies are missing, then make clean make COMPUTE_HEADER_DEPENDENCIES=YesPlease make CHECK_HEADER_DEPENDENCIES=YesPlease will produce an error message like the following: CHECK fast-import.o missing dependencies: exec_cmd.h make: *** [fast-import.o] Error 1 Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx> --- That’s the end of the series. Thanks for reading. Makefile | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++---------- 1 files changed, 80 insertions(+), 15 deletions(-) diff --git a/Makefile b/Makefile index ceaae1c..be357a8 100644 --- a/Makefile +++ b/Makefile @@ -221,6 +221,9 @@ all:: # Define COMPUTE_HEADER_DEPENDENCIES if your compiler supports the -MMD option # and you want to avoid rebuilding objects when an unrelated header file # changes. +# +# Define CHECK_HEADER_DEPENDENCIES to check for problems in the hard-coded +# dependency rules. GIT-VERSION-FILE: FORCE @$(SHELL_PATH) ./GIT-VERSION-GEN @@ -1088,6 +1091,14 @@ endif -include config.mak.autogen -include config.mak +ifdef CHECK_HEADER_DEPENDENCIES +USE_COMPUTED_HEADER_DEPENDENCIES = +endif + +ifdef COMPUTE_HEADER_DEPENDENCIES +USE_COMPUTED_HEADER_DEPENDENCIES = YesPlease +endif + ifdef SANE_TOOL_PATH SANE_TOOL_PATH_SQ = $(subst ','\'',$(SANE_TOOL_PATH)) BROKEN_PATH_FIX = 's|^\# @@BROKEN_PATH_FIX@@$$|git_broken_path_fix $(SANE_TOOL_PATH_SQ)|' @@ -1683,9 +1694,7 @@ XDIFF_OBJS = xdiff/xdiffi.o xdiff/xprepare.o xdiff/xutils.o xdiff/xemit.o \ xdiff/xmerge.o xdiff/xpatience.o OBJECTS := $(GIT_OBJS) $(XDIFF_OBJS) -ASM_SRC := $(wildcard $(OBJECTS:o=S)) -ASM_OBJ := $(ASM_SRC:S=o) -C_OBJ := $(filter-out $(ASM_OBJ),$(OBJECTS)) +dep_files := $(foreach f,$(OBJECTS),$(dir $f)deps/$(notdir $f).d) ifdef COMPUTE_HEADER_DEPENDENCIES dep_dirs := $(addsuffix deps,$(sort $(dir $(OBJECTS)))) @@ -1693,33 +1702,89 @@ $(dep_dirs): mkdir -p $@ missing_dep_dirs := $(filter-out $(wildcard $(dep_dirs)),$(dep_dirs)) -else +dep_file = $(dir $@)deps/$(notdir $@).d +dep_args = -MF $(dep_file) -MMD -MP +ifdef CHECK_HEADER_DEPENDENCIES +$(error cannot compute header dependencies outside a normal build. \ +Please unset CHECK_HEADER_DEPENDENCIES and try again) +endif +endif + +ifndef COMPUTE_HEADER_DEPENDENCIES +ifndef CHECK_HEADER_DEPENDENCIES dep_dirs = missing_dep_dirs = +dep_args = +endif +endif + +ifdef CHECK_HEADER_DEPENDENCIES +ifndef PRINT_HEADER_DEPENDENCIES +missing_deps = $(filter-out $(notdir $^), \ + $(notdir $(shell $(MAKE) -s $@ \ + CHECK_HEADER_DEPENDENCIES=YesPlease \ + USE_COMPUTED_HEADER_DEPENDENCIES=YesPlease \ + PRINT_HEADER_DEPENDENCIES=YesPlease))) +endif endif +ASM_SRC := $(wildcard $(OBJECTS:o=S)) +ASM_OBJ := $(ASM_SRC:S=o) +C_OBJ := $(filter-out $(ASM_OBJ),$(OBJECTS)) + .SUFFIXES: +ifdef PRINT_HEADER_DEPENDENCIES +$(C_OBJ): %.o: %.c FORCE + echo $^ +$(ASM_OBJ): %.o: %.S FORCE + echo $^ + +ifndef CHECK_HEADER_DEPENDENCIES +$(error cannot print header dependencies during a normal build. \ +Please set CHECK_HEADER_DEPENDENCIES and try again) +endif +endif + +ifndef PRINT_HEADER_DEPENDENCIES +ifdef CHECK_HEADER_DEPENDENCIES +$(C_OBJ): %.o: %.c $(dep_files) FORCE + @set -e; echo CHECK $@; \ + missing_deps="$(missing_deps)"; \ + if test "$$missing_deps"; \ + then \ + echo missing dependencies: $$missing_deps; \ + false; \ + fi +$(ASM_OBJ): %.o: %.S $(dep_files) FORCE + @set -e; echo CHECK $@; \ + missing_deps="$(missing_deps)"; \ + if test "$$missing_deps"; \ + then \ + echo missing dependencies: $$missing_deps; \ + false; \ + fi +endif +endif + +ifndef CHECK_HEADER_DEPENDENCIES $(C_OBJ): %.o: %.c GIT-CFLAGS $(missing_dep_dirs) $(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $< -%.s: %.c GIT-CFLAGS FORCE - $(QUIET_CC)$(CC) -S $(ALL_CFLAGS) $< $(ASM_OBJ): %.o: %.S GIT-CFLAGS $(missing_dep_dirs) $(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $< +endif -ifdef COMPUTE_HEADER_DEPENDENCIES +%.s: %.c GIT-CFLAGS FORCE + $(QUIET_CC)$(CC) -S $(ALL_CFLAGS) $< + +ifdef USE_COMPUTED_HEADER_DEPENDENCIES # Take advantage of gcc's on-the-fly dependency generation # See <http://gcc.gnu.org/gcc-3.0/features.html>. -dep_files := $(wildcard $(foreach f,$(OBJECTS),$(dir f)deps/$(notdir $f).d)) -ifneq ($(dep_files),) -include $(dep_files) +dep_files_present := $(wildcard $(dep_files)) +ifneq ($(dep_files_present),) +include $(dep_files_present) endif - -dep_file = $(dir $@)deps/$(notdir $@).d -dep_args = -MF $(dep_file) -MMD -MP else -dep_args = - # Dependencies on header files, for platforms that do not support # the gcc -MMD option. # -- 1.6.6 -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html