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| author | Jakub Jelinek <jakub@redhat.com> | 2022-06-29 17:04:50 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-06-29 17:04:50 +0200 |
| commit | c022c0de2a6c9110350cd50275be97d061a19530 (patch) | |
| tree | 8d3d09a2201cf1bfb6e57d08ce2219eab240d281 /libgfortran/acinclude.m4 | |
| parent | aa87b7541b4c11f59c521154513f844ea6b5c977 (diff) | |
| download | gcc-c022c0de2a6c9110350cd50275be97d061a19530.tar.gz | |
libgfortran: Fix up LIBGFOR_CHECK_FLOAT128 [PR106137]
My recent gfortran + libgfortran patch apparently broke (some?) aarch64
builds. While it is desirable to use just _Float128 rather than __float128,
we only want to use it (and e.g. define HAVE_FLOAT128) on targets where
_Float128 is supported and long double isn't IEEE quad precision.
Which is targets that support __float128 type which we have been testing
for before - _Float128 is supported on those targets and on targets where
long double is IEEE quad precision.
So, the following patch restores check for whether __float128 is supported
into the LIBGFOR_CHECK_FLOAT128 check which determines whether
HAVE_FLOAT128 is defined or whether to use libquadmath, so that e.g. on
aarch64 where long double is IEEE quad we don't do that.
2022-06-29 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/106137
* acinclude.m4 (LIBGFOR_CHECK_FLOAT128): Adjust comment.
Also test for __float128.
(HAVE_FLOAT128): Adjust description.
* config.h.in: Regenerated.
* configure: Regenerated.
Diffstat (limited to 'libgfortran/acinclude.m4')
| -rw-r--r-- | libgfortran/acinclude.m4 | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/libgfortran/acinclude.m4 b/libgfortran/acinclude.m4 index dbf687e5cc2..7585df13fd7 100644 --- a/libgfortran/acinclude.m4 +++ b/libgfortran/acinclude.m4 @@ -261,7 +261,7 @@ __mingw_snprintf (NULL, 0, "%d\n", 1); fi ]) -dnl Check whether we have a __float128 type +dnl Check whether we have a __float128 and _Float128 type AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ LIBQUADSPEC= LIBQUADLIB= @@ -276,7 +276,6 @@ AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ GCC_TRY_COMPILE_OR_LINK([ _Float128 foo (_Float128 x) { - _Complex _Float128 z1, z2; z1 = x; @@ -290,11 +289,18 @@ AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ { return x * __builtin_huge_valf128 (); } + + __float128 baz (__float128 x) + { + return x * __builtin_huge_valf128 (); + } ],[ foo (1.2F128); bar (1.2F128); + baz (1.2F128); foo (1.2Q); bar (1.2Q); + baz (1.2Q); ],[ libgfor_cv_have_float128=yes ],[ @@ -310,7 +316,7 @@ AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ if test "x$USE_IEC_60559" = xyes; then AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.]) fi - AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable _Float128 type.]) + AC_DEFINE(HAVE_FLOAT128, 1, [Define if target has usable _Float128 and __float128 types.]) dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported dnl |