I had a look yesterday and wanted to make a patch this evening, but you beat me to it! This looks a lot like what I wanted to do, so please push.
A tiny bit of nitpicking: On Fri, Mar 06, 2015 at 06:02:01PM +0100, Tomáš Čech wrote: > + gnu/packages/patches/valgrind-glibc_version.patch \ We usually use '-' instead of '_', so I would call it valgrind-glibc-version.patch . Or maybe valgrind-glibc-2.21.patch . Andreas PS: The funny thing is that the error message states that valgrind needs glibc up to 2.19, while the configure script already supports 2.20.