[Bug 1087171] Re: Command line option -PIC accepted on armhf but nowhere else?

[Matthias Klose]

fixed in trusty, won't fix for the older releases

** Changed in: gcc-defaults (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1087171

Title:
  Command line option -PIC accepted on armhf but nowhere else?

Status in “gcc-defaults” package in Ubuntu:
  Fix Released

Bug description:
  The following minimal test case reproduces the problem:
  echo "int main () {}" > test.c && gcc -c -o test.o test.c && gcc -o test -PIC test.o && echo "succeeds"

  On every other architecture I've tried, the -PIC flag results in "gcc:
  error: unrecognized option '-PIC'" which is the typically expected
  behavior here. Apologies if this counts as a linker bug and should not
  be filed under gcc.

  The unexpected success on armhf in Precise is confusing the build
  system of PETSc such that package libpetsc3.1-dev is failing to build
  shared libraries. If this is actually a feature rather than a bug of
  this version/arch of gcc or ld then this could be considered a bug in
  PETSc's build system instead.

  You can see the effect this has on PETSc in its configure.log
  (/usr/lib/petscdir/3.1/$PETSC_ARCH/conf/configure.log, see the tests
  checkPIC and checkSharedLinker). Normally the test fails with '-PIC',
  so it moves on to try '-fPIC' which works correctly for building
  shared libraries.

  It does look as though this has been fixed in Quantal, but the
  unexpected behavior remains in Precise.

  ProblemType: Bug
  DistroRelease: Linaro 12.11
  Package: gcc 4:4.6.3-1ubuntu5
  Uname: Linux 3.2.1-linaro-omap armv7l
  ApportVersion: 2.0.1-0ubuntu15
  Architecture: armhf
  Date: Thu Dec  6 08:24:38 2012
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: gcc-defaults
  UpgradeStatus: No upgrade log present (probably fresh install)

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