diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 52 |
1 files changed, 52 insertions, 0 deletions
@@ -13803,6 +13803,58 @@ _ACEOF fi +# Check for extensions offering the integer scalar type __int128. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __int128" >&5 +$as_echo_n "checking for __int128... " >&6; } +if ${pgac_cv__128bit_int+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* + * These are globals to discourage the compiler from folding all the + * arithmetic tests down to compile-time constants. We do not have + * convenient support for 64bit literals at this point... + */ +__int128 a = 48828125; +__int128 b = 97656255; + +int +main () +{ + +__int128 c,d; +a = (a << 12) + 1; /* 200000000001 */ +b = (b << 12) + 5; /* 400000000005 */ +/* use the most relevant arithmetic ops */ +c = a * b; +d = (c + b) / b; +/* return different values, to prevent optimizations */ +if (d != a+1) + return 0; +return 1; + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + pgac_cv__128bit_int=yes +else + pgac_cv__128bit_int=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv__128bit_int" >&5 +$as_echo "$pgac_cv__128bit_int" >&6; } +if test x"$pgac_cv__128bit_int" = xyes ; then + +$as_echo "#define PG_INT128_TYPE __int128" >>confdefs.h + +fi + # Check for various atomic operations now that we have checked how to declare # 64bit integers. { $as_echo "$as_me:${as_lineno-$LINENO}: checking for builtin __sync char locking functions" >&5 |