2015-04-03 Paul Eggert <eggert@cs.ucla.edu>
Port 'configure' to clang 3.5
- * configure.ac: Add -Wno-unknown-attributes if clang; otherwise
- clang 3.5.0 (Fedora 21 x86-64) complains
+ * configure.ac: Add -Wno-unknown-attributes if clang;
+ otherwise clang 3.5.0 (Fedora 21 x86-64) complains
"/usr/include/glib-2.0/glib/gmem.h: ... warning: unknown attribute
'__alloc_size__' ignored". Use -Werror when checking for -nopie;
otherwise clang warns about -nopie instead of failing, and then