On 01 May 2014, at 15:18, Brooks Davis <bro...@freebsd.org> wrote: > On Wed, Apr 30, 2014 at 11:02:31PM -0600, Warner Losh wrote: >> >> On Apr 29, 2014, at 10:23 PM, Julian Elischer <jul...@freebsd.org> wrote: >>> On 4/30/14, 10:36 AM, Julian Elischer wrote: >>>> In our 8.0 based systems at $JOB our build environment made heavy use of >>>> the --sysroot option in gcc and ld. >>>> >>>> We are trying to move up to a newer release but suddenly the --sysroot >>>> option has disappeared. >>>> >>>> we get the message "/usr/bin/ld: this linker was not configured to use >>>> sysroots" >>> more spefically the following command (from 'configure') fails on "near 9" >>> and succeeds on 8.0. >>> >>> configure:3352: /usr/bin/gcc -Wall -Wno-unused-parameter -nostdinc >>> -isystem /usr/build/buildroot/tools/x86_gcc4.2.4/usr/include --sysroot >>> /usr/build/buildroot/tools/x86_gcc4.2.4 -Wall -Wno-unused-parame >>> ter -nostdinc -isystem /usr/build/buildroot/tools/x86_gcc4.2.4/usr/include >>> --sysroot /usr/build/buildroot/tools/x86_gcc4.2.4 --sysroot >>> /usr/build/buildroot/tools/x86_gcc4.2.4 -L/usr/build/buildroot/too >>> ls/x86_gcc4.2.4/lib -L/usr/build/buildroot/tools/x86_gcc4.2.4/usr/lib >>> conftest.c >&5 >>>> >>>> Does anyone know what happened? and when, and by who? >>>> I have looked in the Makefiles and configuration files in SVN and I can't >>>> see a change that would have done this.. >>>> of course the building of these tools is rather complex so I may have >>>> missed some place.. >> >> Yea, I looked too and don?t see anything. I thought it was broken in more >> like 2005 not 2011. You?re only hope is to bisect the tree down to the >> change that caused it? > > It's been broken since at least the last binutils import and probably > longer since the inane ld behavior of activating --sysroot only when > built with a specified sysroot is from upstream. The fix is trivial, just > merge r257268 and r257530 to the branch you are using.
Yes, I already had a discussion with Julian on IRC about it, but for the sake of the mailing list, a summary: * The change got introduced with the binutils 2.17.50 merge, in r218822 (-CURRENT, at the time). * Upstream apparently introduced this, "because it was hard to make it work": see the thread starting at https://sourceware.org/ml/binutils/2007-02/msg00274.html * Upstream binutils git master still contains the same logic. * Brooks's r257268 and r257530 ensures TARGET_SYSTEM_ROOT is always defined (e.g. to "/" in the regular case), making --sysroot work correctly. -Dimitry
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