Create the 1.2 maintenance branch.
In fact, the maintenance branch for 1.1 was a bit hard to follow, but it didn't proove unfeasible.
1 diff -durN gcc-4.2.1.orig/libstdc++-v3/configure gcc-4.2.1/libstdc++-v3/configure
2 --- gcc-4.2.1.orig/libstdc++-v3/configure 2007-08-03 20:30:21.000000000 +0200
3 +++ gcc-4.2.1/libstdc++-v3/configure 2007-08-03 20:33:56.000000000 +0200
5 cat >>conftest.$ac_ext <<_ACEOF
9 +#error ugly hack to make sure configure test fails here for cross until uClibc supports the complex funcs