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| author | Jean-Sébastien Pédron <[email protected]> | 2015-10-27 16:59:43 +0100 |
|---|---|---|
| committer | Loïc Hoguin <[email protected]> | 2016-10-28 13:16:50 +0300 |
| commit | 4717afcc480ae1ed1141d409af82417984a22aff (patch) | |
| tree | 54291b0f468a0cdadb7baab2f756c6a6eb9dd1c6 /core/erlc.mk | |
| parent | 34a5d5ca352bf06e6208b80bfb8dd32b8e9138c5 (diff) | |
| download | erlang.mk-4717afcc480ae1ed1141d409af82417984a22aff.tar.gz erlang.mk-4717afcc480ae1ed1141d409af82417984a22aff.tar.bz2 erlang.mk-4717afcc480ae1ed1141d409af82417984a22aff.zip | |
Use an intermediate timestamp file to know when to touch source files
The previous approach spawned a shell for every single source files. As
we disable parallel make jobs, this is very time consuming.
The new approach uses an intermediate timestamp file in $(ERLANG_MK_TMP)
to record the last modification of any of $(MAKEFILE_LIST) and touch
all source files in one command. Then, the .app file depends on this
timestamp file.
We test the existence of this timestamp file: if if doesn't exist, don't
touch source files, they will be built anyway.
$(PROJECT).d now depends directly on $(MAKEFILE_LIST); before, this
dependency was indirect through $(ERL_FILES). Also, once $(ERL_FILES)
were touched, we do the same with $(PROJECT).d because there is no need
to regen it because of this.
Diffstat (limited to 'core/erlc.mk')
| -rw-r--r-- | core/erlc.mk | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/core/erlc.mk b/core/erlc.mk index d2fd88b..5bb4078 100644 --- a/core/erlc.mk +++ b/core/erlc.mk @@ -216,13 +216,23 @@ define makedep.erl endef ifeq ($(if $(NO_MAKEDEP),$(wildcard $(PROJECT).d),),) -$(PROJECT).d:: $(ERL_FILES) $(call core_find,include/,*.hrl) +$(PROJECT).d:: $(ERL_FILES) $(call core_find,include/,*.hrl) $(MAKEFILE_LIST) $(makedep_verbose) $(call erlang,$(call makedep.erl,$@)) endif +ifneq ($(words $(ERL_FILES) $(CORE_FILES) $(ASN1_FILES) $(MIB_FILES) $(XRL_FILES) $(YRL_FILES)),0) # Rebuild everything when the Makefile changes. -$(ERL_FILES) $(CORE_FILES) $(ASN1_FILES) $(MIB_FILES) $(XRL_FILES) $(YRL_FILES):: $(MAKEFILE_LIST) - @touch $@ +$(ERLANG_MK_TMP)/last-makefile-change: $(MAKEFILE_LIST) + $(verbose) mkdir -p $(ERLANG_MK_TMP) + $(verbose) if test -f $@; then \ + touch $(ERL_FILES) $(CORE_FILES) $(ASN1_FILES) $(MIB_FILES) $(XRL_FILES) $(YRL_FILES); \ + touch -c $(PROJECT).d; \ + fi + $(verbose) touch $@ + +$(ERL_FILES) $(CORE_FILES) $(ASN1_FILES) $(MIB_FILES) $(XRL_FILES) $(YRL_FILES):: $(ERLANG_MK_TMP)/last-makefile-change +ebin/$(PROJECT).app:: $(ERLANG_MK_TMP)/last-makefile-change +endif -include $(PROJECT).d |