Re: [Crash-utility] [PATCH v2 1/1] Support cross-compilation

In order to support cross-compilation of crash-utilty, the configure tool compiled from configure.c must be built for the host architecture where the cross-compilation will run instead of the target architecture where the crash-utility shall run. Therefore, we need to support two C compilers in Maklefile, one for the host and one for the target. The old CC makefile variable shall represent the compiler for the target architecture and the new CONF_CC makefile variable shall represent the host compiler. Both variables differ only when a cross-compilation is performed. Furthermore, there must be a way to override the target architecture which is deduced from the preprocessor macros defined by the compiler used for the compilation of configure.c, because otherwise the configure tool will deduce host's architecture instead of the desired target. With the new preprocessor define CONF_HOST_ARCH, it is possible to set the desired target architecture for the compiled crash-utility. When cross-compiling, pass the value of CONF_HOST_ARCH via the CONF_CFLAGS makefile variable, e.g. like this: make CONF_CC=gcc CC=s390x-linux-gnu-gcc CONF_FLAGS="-DCONF_HOST_ARCH=S390X" Signed-off-by: Alexander Egorenkov <egorenar-dev(a)posteo.net&gt; --- v1 -> v2: * Improved commit message * Added a note how to cross-compile crash-utilty to README * Moved CONF_CC makefile variable to correct place location