Re: Bug#184446: marked as done (libstdc++5-dev has i486 specific asm code)

[Matthias Klose <doko@cs.tu-berlin.de>]

Daniel Jacobowitz writes:
> On Sun, Apr 13, 2003 at 02:03:03AM -0500, Debian Bug Tracking System wrote:
> >    * On i386, build libstdc++ optimized for i486 and above. The library
> >      in /usr/lib is built for i386. Closes: #184446, #185662.
> 
> Does it really?  The i486-specific code was in a _header_, not in the
> library.

maybe the solution is ugly, but it should work. the macros are
predefined by gcc. more ugly things are used in debian/rules2 to make
sure that the libstdc++ build for i486 uses the i486 header, although
the compiler is built for i386.

gcc-3.2 always used the i486 header. so maybe you are right, that the
same workaround needs to be applied to the 3.2 header.

debian/rules.d/binary-libstdcxx.mk:

        : # construct an atomicity.h file suiteable for i386 and above.
        ( \
          echo '// Debian generated file bits/atomicity.h'; \
          echo '#ifndef _DEBIAN_BITS_ATOMICITY_H'; \
          echo '#define _DEBIAN_BITS_ATOMICITY_H 1'; \
          echo '#if defined(__i486) || defined(__i586) || defined(__i686) || defined(__k6) || defined(__athlon) || defined(__pentium4) || defined(_x86_64)'; \
          cat $(srcdir)/libstdc++-v3/config/cpu/i486/atomicity.h; \
          echo '#else'; \
          cat $(srcdir)/libstdc++-v3/config/cpu/generic/atomicity.h; \
          echo '#endif /* _DEBIAN_BITS_ATOMICITY_H */'; \
        ) > $(d_dev)/$(cxx_inc_dir)/$(DEB_TARGET_GNU_TYPE)/bits/atomicity.h