[adtools] libstdc++-v3 Multilib Support
- From: Trevor Scroggins <trevor.scroggins@xxxxxxxxx>
- To: adtools@xxxxxxxxxxxxx
- Date: Tue, 6 Jul 2010 16:05:21 -0700
All,
Cross-posted from Utilitybase.com:
***
Adtools trunk revision 356 (GCC 4.2.4) must be configured with
'--enable-version-specific-runtime-libs' to enable MULTISUBDIR support
in libstdc++-v3:
# Version-specific runtime libs processing.
if test $version_specific_libs = yes; then
# Need the gcc compiler version to know where to install libraries
# and header files if --enable-version-specific-runtime-libs option
# is selected. FIXME: these variables are misnamed, there are
# no executables installed in _toolexecdir or _toolexeclibdir.
if test x"$gxx_include_dir" = x"no"; then
gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
fi
glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
fi
Not only does this properly install multilibs, e.g. soft-float, it has
the side-effect of installing libs into
$PREFIX/lib/gcc/ppc-amigaos/4.2.4. The libs must still be moved to
$PREFIX/lib/gcc/ppc-amigaos/4.2.4/<crt>/lib.
This begs a new canonical configure command:
../$(SRC_DIR)/configure \
--with-bugurl='http://www.sf.net/projects/adtools' \
--with-pkgversion='adtools build $(VERSION)' \
--target=ppc-amigaos \
--prefix=$(PREFIX) \
--enable-languages=c,c++ \
--enable-haifa \
--enable-sjlj-exceptions \
--disable-libstdcxx-pch \
--disable-tls \
--enable-version-specific-runtime-libs
Of course, you can also configure with '--disable-multilib' to bypass
the whole mess.
***
I suppose the utility of '-msoft-float' is limited when the OS math
libraries are used; however, this small change does configure a
well-formed cross-compiler with hard-float and soft-float libraries in
the proper directories (prior to moving to <crt>/lib).
It would be helpful to have a script or documented process for
building an AmigaOS 4.x native GCC identical to the one provided by
the SDK. (And newlib sources would be helpful as well. ;-) With the
correct source in hand, binary incompatibilities in libstdc++.so
shouldn't be a problem for cross-compilers. Or, is that even an issue?
I haven't used ELF shared libraries under AmigaOS 4.x yet, so I don't
know what idiosyncrasies to expect.
Regards,
Trev
--
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