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I'm working with a crosstool-0.28-rc37 / gcc-3.3.5 toolchain for armv5b- softfloat and discovered that when the toolchain is built on a build system with libunwind, the target system is assumed to have libunwind as well.
The culprit seems to be the libunwind detection code in libstdc++-v3's configure script, and I have been able to work around the problem by modifying armv5b-softfloat.dat to add --disable-libunwind-exceptions to GCC_EXTRA_CONFIG.
This seems as though it shouldn't be necessary, though - gcc shouldn't be assuming that the target system has libunwind just because the build system does.
Has anyone else had trouble with this? Should it be regarded as a crosstool bug, a gcc bug, or neither?
Hrm. Probably a gcc bug, but I'm biased :-) (crosstool should at least show people how to work around it.)
Can you check to see if this bug is present in gcc-4.0.1, and if so, report it to gcc's bugzilla?
Thanks! - Dan
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