42 lines
1.3 KiB
Makefile
42 lines
1.3 KiB
Makefile
# Sample makefile to add version/compiler info via an extra
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# object module linked to final binary.
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#
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COMPILER_VER:=$(shell gcc --version)
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COMPILER_OPTS=-fopenmp
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GIT_DESCRIBE:=$(shell git describe --abbrev=7 --dirty --always --tags --long)
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GIT_AUTHOR:=$(shell git --no-pager log -1 --pretty=format:"%an <%ae>")
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BUILD_DATE:=$(shell date +"%F %H:%M:%S")
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.PHONY: all
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all: hello-omp
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versioninfo.txt:
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@echo "@(#) Build date: ${BUILD_DATE}." >versioninfo.txt
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@echo "@(#) Compiler version: ${COMPILER_VER}." >>versioninfo.txt
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@echo "@(#) Compiler options: ${COMPILER_OPTS}." >>versioninfo.txt
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@echo "@(#) Git info: ${GIT_DESCRIBE}" >>versioninfo.txt
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@echo "@(#) Commit author: ${GIT_AUTHOR}" >>versioninfo.txt
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versioninfo.o: versioninfo.txt
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objcopy --input binary \
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--output elf64-x86-64 \
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--binary-architecture i386 \
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--add-section versioninfo=versioninfo.txt \
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--set-section-flags versioninfo=contents,noload \
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versioninfo.txt versioninfo.o
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hello-omp: hello-omp.c Makefile versioninfo.o
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gcc $(COMPILER_OPTS) -DVERSIONINFO="\"$(GIT_DESCRIBE)\"" hello-omp.c \
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versioninfo.o -o hello-omp
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.PHONY: test
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test:
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(export OMP_NUM_THREADS=2; ./hello-omp)
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sleep 5
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(export OMP_NUM_THREADS=24; ./hello-omp)
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sleep 5
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(export OMP_NUM_THREADS=500; ./hello-omp)
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.PHONY: clean
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clean:
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rm -f hello-omp versioninfo.*
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