* gnu/packages/patches/nlopt_CMake-Assume-working-c-compiler-597.patch:
New file.
* gnu/local.mk: Register new patch.
* gnu/packages/maths.scm (nlopt)[source]: Use it.
Change-Id: I8aa8aa7a62c9050d8b0b15fd23029679c38cc8be
Signed-off-by: Andreas Enge <andreas@enge.fr>