Robert P. J. DAY says:
According to Mike Frysinger, this patch was removed from Gentoo in the
2.3.x series and didn't seem to cause any adverse effects. So toss it
from the patch directories for glibc 2.5 and up.
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