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Diffstat (limited to 'm4/longlong.m4')
| -rw-r--r-- | m4/longlong.m4 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/m4/longlong.m4 b/m4/longlong.m4 new file mode 100644 index 0000000..3716c09 --- /dev/null +++ b/m4/longlong.m4 @@ -0,0 +1,48 @@ +# longlong.m4 serial 8 +dnl Copyright (C) 1999-2006 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Paul Eggert. + +# Define HAVE_LONG_LONG_INT if 'long long int' works. +# This fixes a bug in Autoconf 2.60, but can be removed once we +# assume 2.61 everywhere. + +# Note: If the type 'long long int' exists but is only 32 bits large +# (as on some very old compilers), AC_TYPE_LONG_LONG_INT will not be +# defined. In this case you can treat 'long long int' like 'long int'. + +AC_DEFUN([AC_TYPE_LONG_LONG_INT], +[ + AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[long long int ll = 9223372036854775807ll; + long long int nll = -9223372036854775807LL; + typedef int a[((-9223372036854775807LL < 0 + && 0 < 9223372036854775807ll) + ? 1 : -1)]; + int i = 63;]], + [[long long int llmax = 9223372036854775807ll; + return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) + | (llmax / ll) | (llmax % ll));]])], + [ac_cv_type_long_long_int=yes], + [ac_cv_type_long_long_int=no])]) + if test $ac_cv_type_long_long_int = yes; then + AC_DEFINE([HAVE_LONG_LONG_INT], 1, + [Define to 1 if the system has the type `long long int'.]) + fi +]) + +# This macro is obsolescent and should go away soon. +AC_DEFUN([gl_AC_TYPE_LONG_LONG], +[ + AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) + ac_cv_type_long_long=$ac_cv_type_long_long_int + if test $ac_cv_type_long_long = yes; then + AC_DEFINE(HAVE_LONG_LONG, 1, + [Define if you have the 'long long' type.]) + fi +]) |