Update to AX_FC_REAL8 macro#856
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This is a refactor of AX_FC_REAL8. The GNU test for -f-default-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's lib/fortran.m4. The AMD flang compilers require -fdefault-real-8 but not -fdefault-double-8. We now test for the first flag before testing for both. This patch will slightly improve support for AMD flang compilers.
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adcroft
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This PR has passed pipeline testing at https://gitlab.gfdl.noaa.gov/ogrp/mom6ci/MOM6/-/pipelines/27136. |
This was referenced Apr 23, 2025
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This is a refactor of
AX_FC_REAL8. The GNU test for-fdefault-real-8and-fdefault-double-8is 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-8but 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.