+
+dnl Test whether cbrtl() works.
+dnl On OpenBSD 5.1/SPARC, cbrtl(16.0L) is = 1.2599...
+AC_DEFUN([gl_FUNC_CBRTL_WORKS],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether cbrtl works], [gl_cv_func_cbrtl_works],
+ [
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <math.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+long double cbrtl (long double);
+volatile long double x;
+long double y;
+int main ()
+{
+ x = 16.0L;
+ y = cbrtl (x);
+ if (y < 2.0L)
+ return 1;
+ return 0;
+}
+]])],
+ [gl_cv_func_cbrtl_works=yes],
+ [gl_cv_func_cbrtl_works=no],
+ [case "$host_os" in
+ openbsd*) gl_cv_func_cbrtl_works="guessing no";;
+ *) gl_cv_func_cbrtl_works="guessing yes";;
+ esac
+ ])
+ ])
+])