I think there should be consistency in what we use, so like
libgcobol-fp.h specifies, IEEE quad long double should have highest
priority, then _Float128 with *f128 APIs, then libquadmath.
And when we decide to use say long double, we shouldn't mix that with
strfromf128/strtof128.
Additionally, given that the *l vs. *f128 vs. *q API decision is done
solely in libgcobol and not in the compiler (which is different from
the Fortran case where compiled code emits say sinq or sinf128 calls),
I think libgcobol.spec should only have -lquadmath in any form only in
the case when using libquadmath for everything. In the Fortran case
it is for backwards compatibility purposes, if something has been
compiled with older gfortran which used say sinq and link is done by
gfortran which has been configured against new glibc with *f128, linking
would fail otherwise.
2025-04-15 Jakub Jelinek <jakub@redhat.com>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR cobol/119244
* acinclude.m4 (LIBGCOBOL_CHECK_FLOAT128): Ensure
libgcob_cv_have_float128 is not yes on targets with IEEE quad
long double. Don't check for --as-needed nor set LIBQUADSPEC
on targets which USE_IEC_60559.
* libgcobol-fp.h (FP128_FMT, strtofp128, strfromfp128): Define.
* intrinsic.cc (strtof128): Don't redefine.
(WEIRD_TRANSCENDENT_RETURN_VALUE): Use GCOB_FP128_LITERAL macro.
(__gg__numval_f): Use strtofp128 instead of strtof128.
* libgcobol.cc (strtof128): Don't redefine.
(format_for_display_internal): Use strfromfp128 instead of
strfromf128 or quadmath_snprintf and use FP128_FMT in the format
string.
(get_float128, __gg__compare_2, __gg__move, __gg__move_literala):
Use strtofp128 instead of strtof128.
* configure: Regenerate.
Many of the changes are mechanical:
1. 'GCOB_FP128' in place of _Float128.
2. Using FP128_FUNC to represent the spelling of intrinsics.
3. Using GCOB_FP128_LITERAL() to choose the suffix for literals.
This allows for:
__float128 and 'q' as the suffix when libquadmath is configured.
_Float128 / 'f128' when IEC-60559 is available in libc
long double / 'l' when long double is ieee753 128b.
Add libquadmath to libgcobol.spec and its dependencies where the
platform needs it.
PR cobol/119244
libgcobol/ChangeLog:
* Makefile.am: Add support for libquadmath.
* Makefile.in: Regenerate.
* acinclude.m4: Add support for libquadmath.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Configure libquadmath support.
* gmath.cc: Use GCOB_FP128 to represent the configured
128b floating point type. Use FP128_FUNC to represent
the naming of intrinsics in the configure 128b floating
point type. Render literals with GCOB_FP128_LITERAL.
* intrinsic.cc: Likewise.
* libgcobol.cc: Likewise.
* libgcobol.h: Likewise.
* libgcobol-fp.h: New file.
* gfileio.cc: Include libgcobol-fp.h.
* libgcobol.spec.in: Add libquadmath configure output.
Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
