Date: Wed, 20 Dec 2017 21:03:42 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: musl-cross-make: how to build target libraries with -fpic On Thu, Dec 21, 2017 at 09:51:21AM +1100, Patrick Oppenlander wrote: > Hi, > > what is the the right way to build a toolchain with PIC libraries? > > The best I've come up with is to add > > GCC_CONFIG_FOR_TARGET = CFLAGS_FOR_TARGET="-g -O2 -fpic" > MUSL_CONFIG = CFLAGS="-fpic" > > to my config. But that seems a little over complicated. > > Is there a recommended/better way? Are you specifically trying to get -fpic instead of -fPIC? As far as I know, -fPIC is the default for all of the gcc target libraries anyway; if not all, at least for libgcc (parts of which normally get linked into most shared libraries and thus need to be pic). If you build gcc with --enable-default-pie, musl libc.a will also end up as PIC by default. Aside from that, the above should work, but you should probably be using GCC_CONFIG, not GCC_CONFIG_FOR_TARGET. The latter is intended for the makefiles and your config.mak to automatically build based on $(TARGET) to meet the ABI requirements of the target you specified, and replacing it will definitely break some targets. Rich
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