diff --git a/Usage-of-Intel's-C-C---compiler.md b/Usage-of-Intel's-C-C---compiler.md new file mode 100644 index 0000000..2a5c9ee --- /dev/null +++ b/Usage-of-Intel's-C-C---compiler.md @@ -0,0 +1,21 @@ +If you are interested to use Intel's C/C++ compiler instead of the GCC, you have to guarantee with the compiler flag `-ffreestanding` that the compiler doesn't use the standard environment of your host system. Instead of using the standard path, you have to set with the compiler flag `-I` the include path to HermitCore's environment. However, Intel's compiler creates per default object files for the host system. Our toolchain includes the program `x86_64-hermit-elfedit` that is able to convert with the flag `--output-osabi HermitCore` these files to HermitCore's object files. For linking all object files to a HermitCore executable, you have to use the linker of our toolchain because it includes a valid linker script, which is required to build a bootable executable. + +To summarize this guideline, you find below an [abstract of a Makefile](https://github.com/RWTH-OS/HermitCore/blob/master/hermit/usr/benchmarks/Makefile), which creates a HermitCore executable for the [stream benchmark](https://github.com/RWTH-OS/HermitCore/blob/master/hermit/usr/benchmarks/stream.c). + + ELFEDIT_FOR_TARGET = x86_64-hermit-elfedit + CC_FOR_TARGET = x86_64-hermit-gcc + CC = icc + CFLAGS = -m64 -O3 -xHost -I$(TOPDIR)/hermit/usr/x86/x86_64-hermit/include/ -openmp -ffreestanding + STRIP_DEBUG = --strip-debug + KEEP_DEBUG = --only-keep-debug + + default: stream + + stream.o: stream.c + $(CC) -c $(CFLAGS) -o $@ $< + $(ELFEDIT_FOR_TARGET) --output-osabi HermitCore $@ + + stream: stream.o + $(CC_FOR_TARGET) -fopenmp -o $@ $< + $(OBJCOPY_FOR_TARGET) $(KEEP_DEBUG) $@ $@.sym + $(OBJCOPY_FOR_TARGET) $(STRIP_DEBUG) $@ \ No newline at end of file