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refinement : only copy if binary is different

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This commit is contained in:
Yann Collet
2020-12-10 14:31:35 -08:00
parent c56723ab03
commit c2939b96be
1 changed files with 17 additions and 6 deletions
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23
programs/Makefile
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@@ -98,8 +98,6 @@ ZSTD_ALL_SRC := $(ZSTDLIB_LOCAL_SRC) $(ZSTD_CLI_SRC)
ZSTD_ALL_OBJ := $(ZSTD_ALL_SRC:.c=.o) ZSTD_ALL_OBJ := $(ZSTD_ALL_SRC:.c=.o)
UNAME := $(shell uname) UNAME := $(shell uname)
ifndef BUILD_DIR
ifeq ($(UNAME), Darwin) ifeq ($(UNAME), Darwin)
HASH ?= md5 HASH ?= md5
else ifeq ($(UNAME), FreeBSD) else ifeq ($(UNAME), FreeBSD)
@@ -108,9 +106,10 @@ else ifeq ($(UNAME), OpenBSD)
HASH ?= md5 HASH ?= md5
endif endif
HASH ?= md5sum HASH ?= md5sum
HASH_DIR = conf_$(shell echo $(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(ZSTD_FILES) | $(HASH) | cut -f 1 -d " ")
HAVE_HASH :=$(shell echo 1 | $(HASH) > /dev/null && echo 1 || echo 0) HAVE_HASH :=$(shell echo 1 | $(HASH) > /dev/null && echo 1 || echo 0)
ifndef BUILD_DIR
HASH_DIR = conf_$(shell echo $(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(ZSTD_FILES) | $(HASH) | cut -f 1 -d " ")
ifeq ($(HAVE_HASH),0) ifeq ($(HAVE_HASH),0)
$(info warning : could not find HASH ($(HASH)), needed to differentiate builds using different flags) $(info warning : could not find HASH ($(HASH)), needed to differentiate builds using different flags)
BUILD_DIR := obj/generic_noconf BUILD_DIR := obj/generic_noconf
@@ -232,9 +231,21 @@ $(BUILD_DIR)/zstd : $(ZSTD_OBJ)
@echo LINK $@ @echo LINK $@
$(CC) $(FLAGS) $^ -o $@$(EXT) $(LDFLAGS) $(CC) $(FLAGS) $^ -o $@$(EXT) $(LDFLAGS)
ifeq ($(HAVE_HASH),1)
SRCBIN_HASH = $(shell cat $(BUILD_DIR)/zstd 2> $(VOID) | $(HASH) | cut -f 1 -d " ")
DSTBIN_HASH = $(shell cat zstd 2> $(VOID) | $(HASH) | cut -f 1 -d " ")
BIN_ISDIFFERENT = $(if $(filter $(SRCBIN_HASH),$(DSTBIN_HASH)),0,1)
else
BIN_ISDIFFERENT = 1
endif
zstd : $(BUILD_DIR)/zstd zstd : $(BUILD_DIR)/zstd
cp -f $< $@ if [ $(BIN_ISDIFFERENT) -eq 1 ]; then \
@echo zstd build completed cp -f $< $@; \
echo zstd build completed; \
else \
echo zstd already built; \
fi
endif # BUILD_DIR endif # BUILD_DIR