In the GCC FAQ under "Dynamic linker is unable to find GCC libraries", one
suggestion is to add '-R' or '-rpath' linker option to the *link or *lib
specs so that the GCC libraries can be found.
E.G. the following line is added to the DRIVER_DEFINES when building gcc
via pkgsrc ('$(LINKER_RPATH_FLAG)' comes from the environment):
-DLINK_LIBGCC_SPEC="\"%D $(LINKER_RPATH_FLAG)$(libdir) \""
This is needed as the prefix is normally something like '/usr/pkg/gcc47'.
The problem is that this does not allow for multilib os directory's and
there is currently no simple way of dong so.
My solution is to add the '%M' token that expands to multilib_os_dir.
The above line can then be easily change to handle multilib directory's:
-DLINK_LIBGCC_SPEC="\"%D $(LINKER_RPATH_FLAG)$(libdir)/%M \""
2012-04-27 Steven Drake <s...@netbsd.org>
* gcc.c (do_spec_1): Add %M spec token to output multilib_os_dir.
--- gcc/gcc.c.orig 2012-02-28 17:31:38.000000000 +0000
+++ gcc/gcc.c
@@ -5115,6 +5115,13 @@ do_spec_1 (const char *spec, int inswitc
return value;
break;
+ case 'M':
+ if (multilib_os_dir == NULL)
+ obstack_1grow (&obstack, '.');
+ else
+ obstack_grow (&obstack, multilib_os_dir, strlen(multilib_os_dir));
+ break;
+
case 'G':
value = do_spec_1 (libgcc_spec, 0, NULL);
if (value != 0)
--
Steven
