#443 configure script should not remove -g from CFLAGS

[Philip Chimento]

Flac 1.3.1's configure script runs sed on the CFLAGS environment variable, removing -g. However, it doesn't take into account that the -g option can have an argument, so -ggdb becomes a stray gdb in your CFLAGS, causing compilation to fail.

Even worse, something like -fdiagnostics-generate-patch becomes -fdiagnosticsenerate-patch!

In general, configure should not try to mess with the CFLAGS. If the user wants debug info, then they should pass CFLAGS=-g on the configure command line. If they don't want debug info, then they should pass other flags.

[Erik]

Seems to have already been fixed in Git. See:

https://github.com/xiph/flac/blob/master/configure.ac