Intial commit of source code samples for GitHub repo.

openmp-c/Makefile

@@ -0,0 +1,38 @@
+# Sample makefile to add version/compiler info via an extra
+# object module linked to final binary.
+#
+COMPILER_VER:=$(shell gcc --version)
+COMPILER_OPTS=-fopenmp
+GIT_DESCRIBE:=$(shell git describe --abbrev=7 --dirty --always --tags --long)
+
+.PHONY: all
+all:    hello-omp
+  
+versioninfo.txt:
+	@echo "@(#) Compiler version: ${COMPILER_VER}." >versioninfo.txt
+	@echo "@(#) Compiler options: ${COMPILER_OPTS}." >>versioninfo.txt
+	@echo "@(#) Git info: ${GIT_DESCRIBE}" >>versioninfo.txt
+        
+versioninfo.o:  versioninfo.txt
+	objcopy --input binary \
+		--output elf64-x86-64 \
+		--binary-architecture i386 \
+		--add-section versioninfo=versioninfo.txt \
+		--set-section-flags versioninfo=contents,noload \
+		versioninfo.txt versioninfo.o
+
+hello-omp:  hello-omp.c Makefile versioninfo.o
+	gcc $(COMPILER_OPTS) -DVERSIONINFO="\"$(GIT_DESCRIBE)\"" hello-omp.c \
+		versioninfo.o -o hello-omp
+
+.PHONY: test
+test:
+	(export OMP_NUM_THREADS=2; ./hello-omp)
+	sleep 5
+	(export OMP_NUM_THREADS=24; ./hello-omp)
+	sleep 5
+	(export OMP_NUM_THREADS=500; ./hello-omp)
+
+.PHONY: clean
+clean:
+	rm -f hello-omp	versioninfo.*