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configure.in: enum_over_int

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* configure.in (enum_over_int): check if enum over int is allowed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51849 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-09-13 02:01:22 +00:00
parent ca48cc4ad5
commit a995195d78
1 changed files with 26 additions and 0 deletions
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26
configure.in
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@ -1775,6 +1775,32 @@ if test "$rb_cv_function_name_string" != no; then
AC_DEFINE_UNQUOTED(RUBY_FUNCTION_NAME_STRING, [$rb_cv_function_name_string])
fi
AC_CACHE_CHECK(if enum over int is allowed, rb_cv_enum_over_int, [
rb_cv_enum_over_int=no
if test "x$ac_cv_type_long_long" = xyes; then
type="unsigned long long" max="ULONG_LONG_MAX"
else
type="unsigned long" max="ULONG_MAX"
fi
RUBY_WERROR_FLAG([
AC_COMPILE_IFELSE([
AC_LANG_BOOL_COMPILE_TRY([
@%:@include <limits.h>
enum {conftest_max = $max};
], [
(conftest_max == $max) &&
(sizeof(conftest_max) == sizeof($type))
]
)],
[rb_cv_enum_over_int=yes],
[rb_cv_enum_over_int=no]
)
])
])
if test $rb_cv_enum_over_int = yes; then
AC_DEFINE(ENUM_OVER_INT, 1)
fi
dnl Check whether we need to define sys_nerr locally
AC_CHECK_DECLS([sys_nerr], [], [], [$ac_includes_default
@%:@include <errno.h>])