Update to AX_FC_REAL8 macro #856
Merged
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This is a refactor of
AX_FC_REAL8
. The GNU test for-fdefault-real-8
and-fdefault-double-8
is split into two separate tests. The macro was also redesigned to avoid duplication of the test program, and to follow the same pattern as in autoconf'slib/fortran.m4
.The AMD flang compilers require
-fdefault-real-8
but not-fdefault-double-8
. We now only test for the first flag both before testing for both.This patch will slightly improve support for AMD flang compilers.