Date: Sun, 3 Apr 2016 21:00:31 -0700 From: Isaac Dunham <ibid.ag@...il.com> To: musl@...ts.openwall.com Subject: Re: musl libc.so working and almost building with current pcc On Sun, Apr 03, 2016 at 08:04:48PM -0400, Rich Felker wrote: > On Sun, Apr 03, 2016 at 02:47:56PM -0700, Isaac Dunham wrote: > > Hello, > > Current (20160403) pcc almost builds a working libc.so. > > > > (Unfortunately, it's still necessary to fix the pcc-libs package > > by updating config.guess/config.sub and adding protected visibility; > > I didn't add protected visibility and forced -fPIC, though the build > > system seems to add -fPIC for some files.) > > Everything in libpcc.a needs to be _hidden_, not protected. The issue > is not whether it binds locally but whether it produces > wrongly-exported symbols in shared libs it gets linked into. I remembered the general problem, but not the exact solution (had hidden and protected mixed up). By the way, checking things, yes, adding '-fPIC' to CFLAGS is still necessary. > > However, PCC reports a major internal compiler error at line 1382 > > of ldso/dynlink.c (which is conditional on FDPIC support). > > If I convert the "if (DL_FDPIC) ..." to an ifdef, I get a working libc. > > (src/complex/catanf.c is now properly compiled.) > > It's always defined (to either 0 or 1) so #ifdef produces wrong code. > Did you try #if DL_FDPIC? That should work but there's obviously some > serious pcc bug going on here, probably preprocessor breakage again. Yes, I used '#if DL_FDPIC' (not #ifdef). > FWIW pcc used to work fine but they keep breaking it, usually the > preprocessor. I know. Thanks, Isaac Dunham
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