On Wed, Jan 7, 2015 at 9:07 AM, Brian Drummond <brian@xxxxxxxxxxxxxxxxxx> wrote: > On Wed, 2015-01-07 at 08:53 -0600, Cyd Haselton wrote: >> On Wed, Jan 7, 2015 at 7:41 AM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: >> > On 7 January 2015 at 13:37, Andrew Haley wrote: >> >> I think it's now becoming clear what is happening. Something in ld is >> >> calling dlopen, and fakechroot prints the error. But it's not clear to >> >> me which dlopen does not work in fakechroot. >> >> >> >> My guess is that the problem is due to link-time optimization. gcc is >> >> trying to run -plugin /bld/gcc/builddir-4.9/./gcc/liblto_plugin.so. 4.8 >> >> does not do this. >> > >> > Ahhhhhhh. Sneaky. >> > >> >> Maybe fakechroot can be persuaded to produce a decent error message with >> >> some more information. >> >> >> >> It may be possible to disable LTO. >> > >> > --disable-lto >> >> According to libgcc/configure this is an invalid option. Any other >> way to disable it? > > --disable-lto is a gcc configure option, AFAIK using it involves (make > dist_clean or delete builddir) and rebuilding the lot. > > -- Brian > Adding -fno-lto to CFLAGS in the 4.9 libgcc Makefile worked. Libgcc_s.so built and linked successfully. I will add this to my list of build notes Thanks everyone for all of your help and patience. Anything else you need from me?
