Workaround the following link problem:
	tc-mips.o: In function `mips_parse_arguments':
	tc-mips.c:(.text+0x9af8): undefined reference to `_obstack_free'
	tc-mips.o: In function `md_assemble':
	tc-mips.c:(.text+0xfb5c): undefined reference to `_obstack_free'
	cond.o: In function `s_endif':
	cond.c:(.text+0xcb0): undefined reference to `_obstack_free'
	cond.o: In function `cond_exit_macro':
	cond.c:(.text+0x120c): undefined reference to `_obstack_free'
	hash.o: In function `hash_die':
	hash.c:(.text+0x28c): undefined reference to `_obstack_free'
	hash.o:hash.c:(.text+0x65c): more undefined references to `_obstack_free' follow

The alternative would be to backport the following uclibc/uclibc-ng commits:
 1. http://www.uclibc-ng.org/changeset/532c68d561128b390b5436f2962c2f47aa8bc5f0/uclibc-ng
 2. http://www.uclibc-ng.org/changeset/975bca165c3e10e74c05c0384fd58f45a7025a3c/uclibc-ng
 3. http://www.uclibc-ng.org/changeset/736d9eee2731ba8c442ada629b14f4887cafaae2/uclibc-ng
 4. http://www.uclibc-ng.org/changeset/06e4fe64bbd01f16ee84da161b8e1a61e73b4cdb/uclibc-ng

--- libiberty/obstack.c
+++ libiberty/obstack.c
@@ -47,6 +47,11 @@
 # endif
 #endif
 
+/* uClibc(-ng) versions prior to 1.0.14 do not provide _obstack_free symbol */
+#if defined(__UCLIBC__) && ( (__UCLIBC_MAJOR__ == 0) || (__UCLIBC_MAJOR__ == 1 && __UCLIBC_MINOR__ == 0 && __UCLIBC_SUBLEVEL__ < 14) )
+# undef _OBSTACK_ELIDE_CODE
+#endif
+
 #ifndef _OBSTACK_ELIDE_CODE
 /* If GCC, or if an oddball (testing?) host that #defines __alignof__,
    use the already-supplied __alignof__.  Otherwise, this must be Gnulib