re PR libstdc++/66018 (opendir configure test not working when GCC_NO_EXECUTABLES)

	PR libstdc++/66018
	* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for struct
	dirent.d_type.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac (AC_STRUCT_DIRENT_D_TYPE): Remove.

From-SVN: r223194

libstdc++-v3/ChangeLog

+2015-05-14  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/66018
+	* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for struct
+	dirent.d_type.
+	* config.h.in: Regenerate.
+	* configure: Regenerate.
+	* configure.ac (AC_STRUCT_DIRENT_D_TYPE): Remove.
+
 2015-05-13  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* acinclude.m4 (GLIBCXX_ENABLE_SJLJ_EXCEPTIONS): Delete.

libstdc++-v3/acinclude.m4

@@ -3875,6 +3875,22 @@ dnl
   ac_save_CXXFLAGS="$CXXFLAGS"
   CXXFLAGS="$CXXFLAGS -fno-exceptions"
 dnl
+  AC_MSG_CHECKING([for struct dirent.d_type])
+  AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
+    GCC_TRY_COMPILE_OR_LINK(
+      [#include <dirent.h>],
+      [
+       struct dirent d;
+       if (sizeof d.d_type) return 0;
+      ],
+      [glibcxx_cv_dirent_d_type=yes],
+      [glibcxx_cv_dirent_d_type=no])
+  ])
+  if test $glibcxx_cv_dirent_d_type = yes; then
+    AC_DEFINE(_GLIBCXX_HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
+dnl
   AC_MSG_CHECKING([for realpath])
   AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
     GCC_TRY_COMPILE_OR_LINK(

libstdc++-v3/config.h.in

@@ -54,8 +54,7 @@
 /* Define to 1 if you have the `cosl' function. */
 #undef HAVE_COSL
 
-/* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
-   */
+/* Define to 1 if you have the <dirent.h> header file. */
 #undef HAVE_DIRENT_H
 
 /* Define to 1 if you have the <dlfcn.h> header file. */
@@ -301,9 +300,6 @@
 /* Define to 1 if you have the <nan.h> header file. */
 #undef HAVE_NAN_H
 
-/* Define to 1 if you have the <ndir.h> header file, and it defines `DIR'. */
-#undef HAVE_NDIR_H
-
 /* Define if poll is available in <poll.h>. */
 #undef HAVE_POLL
 
@@ -382,9 +378,6 @@
 /* Define to 1 if you have the `strtold' function. */
 #undef HAVE_STRTOLD
 
-/* Define to 1 if `struct dirent' is a member of `d_type'. */
-#undef HAVE_STRUCT_DIRENT_D_TYPE
-
 /* Define if strxfrm_l is available in <string.h>. */
 #undef HAVE_STRXFRM_L
 
@@ -392,10 +385,6 @@
    to different versions. */
 #undef HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT
 
-/* Define to 1 if you have the <sys/dir.h> header file, and it defines `DIR'.
-   */
-#undef HAVE_SYS_DIR_H
-
 /* Define to 1 if you have the <sys/filio.h> header file. */
 #undef HAVE_SYS_FILIO_H
 
@@ -411,10 +400,6 @@
 /* Define to 1 if you have the <sys/machine.h> header file. */
 #undef HAVE_SYS_MACHINE_H
 
-/* Define to 1 if you have the <sys/ndir.h> header file, and it defines `DIR'.
-   */
-#undef HAVE_SYS_NDIR_H
-
 /* Define to 1 if you have the <sys/param.h> header file. */
 #undef HAVE_SYS_PARAM_H
 
@@ -753,6 +738,9 @@
 /* Define if gthreads library is available. */
 #undef _GLIBCXX_HAS_GTHREADS
 
+/* Define to 1 if `d_type' is a member of `struct dirent'. */
+#undef _GLIBCXX_HAVE_STRUCT_DIRENT_D_TYPE
+
 /* Define to 1 if a full hosted library is built, or 0 if freestanding. */
 #undef _GLIBCXX_HOSTED
 

libstdc++-v3/configure.ac

@@ -403,7 +403,6 @@ GLIBCXX_CHECK_GTHREADS
 
 # For Filesystem TS.
 AC_CHECK_HEADERS([fcntl.h dirent.h sys/statvfs.h utime.h])
-AC_STRUCT_DIRENT_D_TYPE
 GLIBCXX_ENABLE_FILESYSTEM_TS
 GLIBCXX_CHECK_FILESYSTEM_DEPS