Date: Fri, 6 May 2016 01:14:29 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Cc: j-core@...ore.org Subject: Re: musl-cross-make / litecross improvements On Tue, May 03, 2016 at 11:57:05PM +0200, Szabolcs Nagy wrote: > * Szabolcs Nagy <nsz@...t70.net> [2016-05-03 22:16:22 +0200]: > > * Rich Felker <dalias@...c.org> [2016-05-03 14:02:30 -0400]: > > > On Tue, May 03, 2016 at 01:39:43PM +0200, Szabolcs Nagy wrote: > > > > i think the usr/ and lib64/ symlinks are useful > > > > (so it can be used as rootfs without fiddling > > > > with etc/ld-musl*.path). > > > > > > Yes. Is there a good way to override that in gcc or should we just > > > make the symlinks? > > > > > > > output/lib64 can be eliminated by > > COMMON_CONFIG += --libdir=/lib > > > > output/x86_64-linux-musl/lib64 install path is trickier: > > it is controlled by the $toolexeclibdir make variable. > > which is set according to $CC -print-multi-os-directory > > which is controlled by multilib and multilib_defaults from > > $CC -dumpspecs which comes from multilib.h generated by > > genmultilib based on parameters from config/i386/t-linux64 > > > > it was not clear if the t-linux64 thing could be overridden, but > > GCC_CONFIG += --with-multilib-list= > > fixes it (the lib dir is lib/ then). I've looked into this more, and while I think your approach works in practice, I'm a bit concerned that --with-multilib-list= is processed per-target and in theory the blank list might break something. I tried x86_64, sh, and aarch64, but several other archs remain, I think. The root cause of this bug seems to be a broken conditional in gcc/Makefile.in; for the s-mlib rule, the condition for building multilib layout is: if test @enable_multilib@ = yes \ || test -n "$(MULTILIB_OSDIRNAMES)"; then \ I believe the || should have been &&. In any case, forcing MULTILIB_OSDIRNAMES= on the make command line seems like a viable solution. I'm testing it now and I'll probably commit as long as it works. Rich
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