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use expanded variables for shell commands

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Performance improvement for the shell commands in the Makefile.
By using expanded variables, the shell commands are only
evaluated once, instead of every time they are used.

closes https://github.com/official-stockfish/Stockfish/pull/4838

No functional change
This commit is contained in:
Disservin 2023-10-22 16:43:33 +02:00
parent 40c6a84434
commit b187622233
1 changed files with 9 additions and 9 deletions
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18
src/Makefile
View file

@ -20,9 +20,9 @@
### ==========================================================================
### Establish the operating system name
KERNEL = $(shell uname -s)
KERNEL := $(shell uname -s)
ifeq ($(KERNEL),Linux)
OS = $(shell uname -o)
OS := $(shell uname -o)
endif
### Target Windows OS
@ -33,7 +33,7 @@ ifeq ($(OS),Windows_NT)
else ifeq ($(COMP),mingw)
target_windows = yes
ifeq ($(WINE_PATH),)
WINE_PATH = $(shell which wine)
WINE_PATH := $(shell which wine)
endif
endif
@ -116,7 +116,7 @@ ifeq ($(ARCH),)
endif
ifeq ($(ARCH), native)
override ARCH = $(shell $(SHELL) ../scripts/get_native_properties.sh | cut -d " " -f 1)
override ARCH := $(shell $(SHELL) ../scripts/get_native_properties.sh | cut -d " " -f 1)
endif
# explicitly check for the list of supported architectures (as listed with make help),
@ -542,8 +542,8 @@ endif
### Sometimes gcc is really clang
ifeq ($(COMP),gcc)
gccversion = $(shell $(CXX) --version 2>/dev/null)
gccisclang = $(findstring clang,$(gccversion))
gccversion := $(shell $(CXX) --version 2>/dev/null)
gccisclang := $(findstring clang,$(gccversion))
ifneq ($(gccisclang),)
profile_make = clang-profile-make
profile_use = clang-profile-use
@ -601,7 +601,7 @@ ifeq ($(optimize),yes)
endif
ifeq ($(comp),clang)
clangmajorversion = $(shell $(CXX) -dumpversion 2>/dev/null | cut -f1 -d.)
clangmajorversion := $(shell $(CXX) -dumpversion 2>/dev/null | cut -f1 -d.)
ifeq ($(shell expr $(clangmajorversion) \< 16),1)
CXXFLAGS += -fexperimental-new-pass-manager
endif
@ -717,13 +717,13 @@ ifeq ($(pext),yes)
endif
### 3.8.1 Try to include git commit sha for versioning
GIT_SHA = $(shell git rev-parse HEAD 2>/dev/null | cut -c 1-8)
GIT_SHA := $(shell git rev-parse HEAD 2>/dev/null | cut -c 1-8)
ifneq ($(GIT_SHA), )
CXXFLAGS += -DGIT_SHA=$(GIT_SHA)
endif
### 3.8.2 Try to include git commit date for versioning
GIT_DATE = $(shell git show -s --date=format:'%Y%m%d' --format=%cd HEAD 2>/dev/null)
GIT_DATE := $(shell git show -s --date=format:'%Y%m%d' --format=%cd HEAD 2>/dev/null)
ifneq ($(GIT_DATE), )
CXXFLAGS += -DGIT_DATE=$(GIT_DATE)
endif