tree d255ddde6dfc855239fd6f6e1a6ba0c6b39dbb0c
parent 10140f4aa38ed90bbf7b5d9fe13c155a65a0724e
author Daniel Rodríguez Troitiño <danielrodriguez@fb.com> 1551825434 -0800
committer Daniel Rodríguez Troitiño <danielrodriguez@fb.com> 1551825434 -0800

[cmake] Skip regex when CMAKE_STATIC_LIBRARY_PREFIX is empty.

In platforms like Windows, there's no prefix for static libraries.
Interpolating it in the regex will end up with a regex "^", which seems
not to be valid. Since the regex was removing the prefix, we can simply
skip the operation and the result will be the same.

Also do the same for CMAKE_STATIC_LIBRARY_SUFFIX, even if in that case,
Windows will have a value (but if it is empty, it will fail trying to
create the regex).