refinement : only copy if binary is different
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c56723ab03
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c2939b96be
@ -98,8 +98,6 @@ ZSTD_ALL_SRC := $(ZSTDLIB_LOCAL_SRC) $(ZSTD_CLI_SRC)
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ZSTD_ALL_OBJ := $(ZSTD_ALL_SRC:.c=.o)
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UNAME := $(shell uname)
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ifndef BUILD_DIR
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ifeq ($(UNAME), Darwin)
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HASH ?= md5
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else ifeq ($(UNAME), FreeBSD)
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@ -108,9 +106,10 @@ else ifeq ($(UNAME), OpenBSD)
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HASH ?= md5
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endif
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HASH ?= md5sum
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HASH_DIR = conf_$(shell echo $(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(ZSTD_FILES) | $(HASH) | cut -f 1 -d " ")
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HAVE_HASH :=$(shell echo 1 | $(HASH) > /dev/null && echo 1 || echo 0)
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ifndef BUILD_DIR
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HASH_DIR = conf_$(shell echo $(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(ZSTD_FILES) | $(HASH) | cut -f 1 -d " ")
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ifeq ($(HAVE_HASH),0)
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$(info warning : could not find HASH ($(HASH)), needed to differentiate builds using different flags)
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BUILD_DIR := obj/generic_noconf
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@ -232,9 +231,21 @@ $(BUILD_DIR)/zstd : $(ZSTD_OBJ)
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@echo LINK $@
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$(CC) $(FLAGS) $^ -o $@$(EXT) $(LDFLAGS)
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ifeq ($(HAVE_HASH),1)
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SRCBIN_HASH = $(shell cat $(BUILD_DIR)/zstd 2> $(VOID) | $(HASH) | cut -f 1 -d " ")
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DSTBIN_HASH = $(shell cat zstd 2> $(VOID) | $(HASH) | cut -f 1 -d " ")
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BIN_ISDIFFERENT = $(if $(filter $(SRCBIN_HASH),$(DSTBIN_HASH)),0,1)
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else
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BIN_ISDIFFERENT = 1
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endif
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zstd : $(BUILD_DIR)/zstd
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cp -f $< $@
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@echo zstd build completed
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if [ $(BIN_ISDIFFERENT) -eq 1 ]; then \
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cp -f $< $@; \
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echo zstd build completed; \
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else \
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echo zstd already built; \
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fi
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endif # BUILD_DIR
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