diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/sd_check_max_int_size.m4 | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/m4/sd_check_max_int_size.m4 b/m4/sd_check_max_int_size.m4 new file mode 100644 index 0000000000..a4230b5ee8 --- /dev/null +++ b/m4/sd_check_max_int_size.m4 @@ -0,0 +1,27 @@ +dnl Find what INT_MAX define to use for a type + +#serial 1 + +ifdef([AC_TR_SH],[], [ +define([AC_TR_SH], + [patsubst(translit([[$1]], [*+], [pp]), [[^a-zA-Z0-9_]], [_])]) +define([AC_TR_CPP], + [patsubst(translit([[$1]], + [*abcdefghijklmnopqrstuvwxyz], + [PABCDEFGHIJKLMNOPQRSTUVWXYZ]), + [[^A-Z0-9_]], [_])]) +]) + +AC_DEFUN([SD_CHECK_MAX_INT_SIZE], + [AC_CHECK_SIZEOF([long],,) + AC_CHECK_SIZEOF([long long],,) + AC_CHECK_SIZEOF([$1],,[$2]) + AS_CASE([$ac_cv_sizeof_[]AC_TR_SH($1)], + [$ac_cv_sizeof_long], [sd_type_max=LONG_MAX], + [$ac_cv_sizeof_long_long], [sd_type_max=LONG_LONG_MAX], + [AC_MSG_ERROR([Don't know how to map $1 to an integer])]) + AC_DEFINE_UNQUOTED(AC_TR_CPP($1_MAX), [$sd_type_max], + [what int to use to maximize $1]) + AC_MSG_CHECKING([what int to to use to maximize $1]) + AC_MSG_RESULT([$sd_type_max]) +]) |