diff options
Diffstat (limited to 'config/c-compiler.m4')
| -rw-r--r-- | config/c-compiler.m4 | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/config/c-compiler.m4 b/config/c-compiler.m4 index 6dcc790649..492f6832cf 100644 --- a/config/c-compiler.m4 +++ b/config/c-compiler.m4 @@ -96,9 +96,11 @@ undefine([Ac_cachevar])dnl # PGAC_TYPE_128BIT_INT # --------------------- # Check if __int128 is a working 128 bit integer type, and if so -# define PG_INT128_TYPE to that typename. This currently only detects -# a GCC/clang extension, but support for different environments may be -# added in the future. +# define PG_INT128_TYPE to that typename, and define ALIGNOF_PG_INT128_TYPE +# as its alignment requirement. +# +# This currently only detects a GCC/clang extension, but support for other +# environments may be added in the future. # # For the moment we only test for support for 128bit math; support for # 128bit literals and snprintf is not required. @@ -128,6 +130,7 @@ return 1; [pgac_cv__128bit_int=no])]) if test x"$pgac_cv__128bit_int" = xyes ; then AC_DEFINE(PG_INT128_TYPE, __int128, [Define to the name of a signed 128-bit integer type.]) + AC_CHECK_ALIGNOF(PG_INT128_TYPE) fi])# PGAC_TYPE_128BIT_INT |