Mercurialcrosstool-ng / file revision
summary | shortlog | changelog | graph | tags | branches | files | changeset | file | latest | revisions | annotate | diff | raw | help
patches/gcc/4.2.1/300-libstdc++-nostdlib-linking.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Thu May 26 22:51:03 2011 +0200 (2011-05-26)
changeset 2481 30644208c955
permissions -rw-r--r--
configure: add possibility to set arbitrary variable in check_for

If check_for is able to find the required prog/inc/lib, allow it to
set an arbitrary variable to 'y'. This variable is then pushed down
to the kconfig definition.

For example:
has_or_abort prog=foobar kconfig=has_foobar

If foobar is available, it yields a kconfig variable defaulting to y:
config CONFIGURE_has_foobar
bool
default y

If foobar is missing, it yields a kconfig variable defaulting to n:
config CONFIGURE_has_foobar
bool

Thus it is possible to depends on that variabel to show/hide options:
config SOME_FEATURE
bool
prompt "Some feature"
depends on CONFIGURE_has_foobar

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 On 20090401, Ted Jordan writes:

     2  The generated libtool for building libstdc++ adds the -nostdlib option to the

     3  g++ command for linking but doesn't add -lgcc.  This causes a "hidden symbol"

     4  error when linking against the libstdc++ shared object.  This patch adds gcc

     5  to the list of libraries linked against when linking libstdc++.

     6 

     7 Index: gcc-4.2.1/ltcf-cxx.sh

     8 ===================================================================

     9 --- gcc-4.2.1.orig/ltcf-cxx.sh	2005-07-15 21:30:53.000000000 -0500

    10 +++ gcc-4.2.1/ltcf-cxx.sh	2009-04-02 09:30:34.000000000 -0500

    11 @@ -78,8 +78,8 @@

    12    # to be the same.

    13  

    14    if test "$with_gnu_ld" = yes; then

    15 -    archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'

    16 -    archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'

    17 +    archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -lgcc ${wl}-soname $wl$soname -o $lib'

    18 +    archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -lgcc ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'

    19  

    20      hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'

    21      export_dynamic_flag_spec='${wl}--export-dynamic'
crosstool-ng