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>
yann@1287
     1
On 20090401, Ted Jordan writes:
yann@1287
     2
 The generated libtool for building libstdc++ adds the -nostdlib option to the
yann@1287
     3
 g++ command for linking but doesn't add -lgcc.  This causes a "hidden symbol"
yann@1287
     4
 error when linking against the libstdc++ shared object.  This patch adds gcc
yann@1287
     5
 to the list of libraries linked against when linking libstdc++.
yann@1287
     6
yann@1287
     7
Index: gcc-4.2.1/ltcf-cxx.sh
yann@1287
     8
===================================================================
yann@1287
     9
--- gcc-4.2.1.orig/ltcf-cxx.sh	2005-07-15 21:30:53.000000000 -0500
yann@1287
    10
+++ gcc-4.2.1/ltcf-cxx.sh	2009-04-02 09:30:34.000000000 -0500
yann@1287
    11
@@ -78,8 +78,8 @@
yann@1287
    12
   # to be the same.
yann@1287
    13
 
yann@1287
    14
   if test "$with_gnu_ld" = yes; then
yann@1287
    15
-    archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
yann@1287
    16
-    archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
yann@1287
    17
+    archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -lgcc ${wl}-soname $wl$soname -o $lib'
yann@1287
    18
+    archive_expsym_cmds='$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'
yann@1287
    19
 
yann@1287
    20
     hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
yann@1287
    21
     export_dynamic_flag_spec='${wl}--export-dynamic'