[Buildroot] Bug with gmp and mpfr
Vania Joloboff
vania.joloboff at tsinghua.edu.cn
Mon Apr 20 08:29:39 UTC 2009
Hi,
We have a problem. We have build gcc with buildroot and in most cases it
works fine.
But in one case we do not want to use the _start entry point because we
redefine it.
So we use option -nostdlib and then we explicitly want to link with
libstdc++ and libgcc
so we use a command like
g++ -nostdlib path/to/ourfiles $options -lstdc++ -lc -lgcc
We get
/usr/local/cross/arm/usr/bin/../lib/gcc/arm-linux-uclibc/4.3.2/../../../../arm-linux-uclibc/bin/ld:
warning: libgcc_s.so.1, needed by
/usr/local/cross/arm/usr/arm-linux-uclibc/lib/libstdc++.so, not found
(try using -rpath or -rpath-link)
and then many undefined references to _Unwind_*
We have tried using
1. -L options on the command line with the directories where are
libgcc_s.so.1 and libstdc++
2. the -static-libgcc option
3. using export LD_LIBRARY_PATH=/path/to/libs
4. using LD_RUN_PATH=/path/to/libs
None of the 4 above work.
Does anybody have any clue ?
Can we build buildroot so that it uses only static linking ?
PS: Using the -L option just works fine if we build gcc with binutils
and newlib.
It does not work with uclibc.
--
Sincerely,
-- Vania Joloboff
======================================================================
Tsinghua University, FIT Building, 3-605, Beijing 100040, China
Tel: +80 10 6279 6979 x605
email: vania.joloboff at tsinghua.edu.cn
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