ARM: recognize gfortran pre-releases

Without proper recognition of gfortran versions such as
> GNU Fortran (GCC) 4.9.x 20150123 (prerelease)
OpenBLAS assumes the presence of the G77 compiler. Consequently,
`-lgfortran` is missing from the pkg-config file.

The aforementioned compiler is the gfortran compiler in the Android repo
in a commit tagged as `ndk-r14`, cf. Paul Mustière's gfortran build
instructions for Android at https://github.com/buffer51/android-gfortran

diff --git a/f_check b/f_check
index f438060..b3e0311 100644 (file)
--- a/f_check
+++ b/f_check
@@ -71,7 +71,7 @@ if ($compiler eq "") {
 
        if ($data =~ /GNU/) {
 
-           $data =~ /(\d)\.(\d).(\d)/;
+           $data =~ /(\d)\.(\d).(.)/;
            $major = $1;
            $minor = $2;