* configure.in (rb_cv_gnu_qsort_r): use compile error "conflicting

  types for 'qsort_r'" instead of AC_RUN_IFELSE.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44894 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 23 deletions

diff --git a/configure.in b/configure.in
index 609d797d76..9f8b31f60f 100644
--- a/configure.in
+++ b/configure.in
@@ -1982,30 +1982,13 @@ RUBY_CHECK_BUILTIN_FUNC(__builtin_choose_expr, [__builtin_choose_expr(0, 0, 0)])
 RUBY_CHECK_BUILTIN_FUNC(__builtin_types_compatible_p, [__builtin_types_compatible_p(int, int)])
 
 if test "$ac_cv_func_qsort_r" != no; then
-  AC_CACHE_CHECK(that qsort_r is GNU version, rb_cv_gnu_qsort_r,
-    [AC_RUN_IFELSE(
-      [AC_LANG_SOURCE([[
+  AC_CACHE_CHECK(whether qsort_r is GNU version, rb_cv_gnu_qsort_r,
+    [AC_TRY_COMPILE([
 #include <stdlib.h>
-
-int unsorted[] = { 4, 3, 2, 1 };
-int sorted[] = { 1, 2, 3, 4 };
-
-int
-compar(const void *a, const void *b, void *arg)
-{
-  if (*(int *)arg != 42) exit(1);
-  return *(int *)a - *(int *)b;
-}
-
-int
-main(void)
-{
-  int arg = 42;
-  qsort_r(unsorted, 4, sizeof(int), compar, &arg);
-  if (memcmp(sorted, unsorted, 4) != 0) return 1;
-  return 0;
-}
-      ]])],
+void qsort_r(void *base, size_t nmemb, size_t size,
+	    int (*compar)(const void *, const void *, void *),
+	    void *arg);
+],[ ],
       [rb_cv_gnu_qsort_r=yes],
       [rb_cv_gnu_qsort_r=no])
   ])