[I know this is a duplicate of 43810, but the information there is
partly misleading, so I decided to file a new report.]
If GCC is configured for powerpc with --enable-target-optspace,
libgcc_s objects get compiled with -Os, and this causes libgcc_s
to contain undefined symbols _savegpr_* and _restgpr_*.
This is probably due to this commit:
http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151729
(The use of those symbols might also depend on --with-float=soft,
I didn't test with a different float option.)
Those symbols _savegpr_* and _restgpr_* are defined in
crtsavgpr_s.o and crtresgpr_s.o, respectively. But those objects
are not linked into libgcc_s.
The problem also occurs with gcc-4.5.1-RC-20100722 and with
gcc-4.4.4, if the patch for pr41175 is applied.
Environment:
System: Linux sonnet 2.6.24-28-generic #1 SMP Fri Jun 18 14:18:04 UTC 2010
x86_64 GNU/Linux
host: x86_64-unknown-linux-gnu
build: x86_64-unknown-linux-gnu
target: powerpc-none-linux-gnu
configured with: /work2/build/cross-own/src/gcc-4.5.0/configure
--target=powerpc-none-linux-gnu --prefix=/work2/build/cross-own/ppc-own-tmp
--disable-threads --disable-nls --disable-multilib --disable-libgomp
--disable-libssp --disable-libmudflap --enable-decimal-float=no
--disable-libssp --enable-shared --enable-languages=c --enable-checking=yes
--enable-symvers=gnu --enable-target-optspace --with-float=soft
--with-local-prefix=/work2/build/cross-own/ppc-own/sys-root
--with-build-sysroot=/work2/build/cross-own/ppc-own/sys-root
--with-sysroot=/work2/build/cross-own/ppc-own/sys-root
How-To-Repeat:
configure for powerpc and --enable-target-optspace (and possibly
--with-float=soft)
------- Comment #1 from dv at vollmann dot ch 2010-07-24 12:42 -------
Fix:
The workaround is not to use --enable-target-optspace.
The correct fix would be to link libgcc_s against crtsavgpr_s.o
and crtresgpr_s.o, but I don't know the build system of GCC well
enough to figure out how to do that.
--
Summary: libgcc_s link command misses crtsavgpr_s and crtresgpr_s
for powerpc
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dv at vollmann dot ch
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: powerpc-none-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45053
