diff options
| author | Jonathan Wakely <jwakely@redhat.com> | 2021-05-04 12:07:09 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2021-05-04 12:07:09 +0100 |
| commit | ad0a3be4df5eecc79075d899fd79179d0f61270e (patch) | |
| tree | f6076b0429da786eee7a2e0107fb8346369c7241 /libstdc++-v3/acinclude.m4 | |
| parent | 93f8cb4965cebee125f96376367f05e18ee5749b (diff) | |
libstdc++: Remove _GLIBCXX_USE_INT128 autoconf macro
We don't need to decide whether to use __int128 when running configure,
we can do so at compilation time by seeing if __SIZEOF_INT128__ is
defined and if it's greater than __SIZEOF_LONG_LONG__.
This removes another unnecessary architecture-specific config macro in
<bits/c++config.h>, so the same header can work for 32-bit or 64-bit
compilation on AIX.
libstdc++-v3/ChangeLog:
* acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
* include/bits/random.h (_Select_uint_least_t<s, 1>):
Use __SIZEOF_INT128__ to decide whether to use __int128.
* include/std/charconv (__to_chars_unsigned_type): Likewise.
Diffstat (limited to 'libstdc++-v3/acinclude.m4')
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 36 |
1 files changed, 4 insertions, 32 deletions
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index 7b78e148fbd..94897a654c9 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -3049,15 +3049,14 @@ EOF ]) dnl -dnl Check for GNU 128-bit integer and floating point types. +dnl Check for GNU 128-bit floating point type. dnl -dnl Note: also checks that the types aren't standard types. +dnl Note: also checks that the type isn't a standard types. dnl dnl Defines: -dnl _GLIBCXX_USE_INT128 dnl ENABLE_FLOAT128 dnl -AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ +AC_DEFUN([GLIBCXX_ENABLE_FLOAT128], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS @@ -3065,34 +3064,7 @@ AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ # Fake what AC_TRY_COMPILE does, without linking as this is # unnecessary for this test. - cat > conftest.$ac_ext << EOF -[#]line __oline__ "configure" -template<typename T1, typename T2> - struct same - { typedef T2 type; }; - -template<typename T> - struct same<T, T>; - -int main() -{ - typename same<long, __int128>::type i1; - typename same<long long, __int128>::type i2; -} -EOF - - AC_MSG_CHECKING([for __int128]) - if AC_TRY_EVAL(ac_compile); then - AC_DEFINE(_GLIBCXX_USE_INT128, 1, - [Define if __int128 is supported on this host.]) - enable_int128=yes - else - enable_int128=no - fi - AC_MSG_RESULT($enable_int128) - rm -f conftest* - - cat > conftest.$ac_ext << EOF + cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" template<typename T1, typename T2> struct same |