Generate table with word break data.

[gnulib.git] / m4 / obstack-printf-posix.m4

diff --git a/m4/obstack-printf-posix.m4 b/m4/obstack-printf-posix.m4
index b5678b4..8768e67 100644 (file)
--- a/m4/obstack-printf-posix.m4
+++ b/m4/obstack-printf-posix.m4
@@ -1,4 +1,4 @@
-# obstack-printf-posix.m4 serial 1
+# obstack-printf-posix.m4 serial 2
 dnl Copyright (C) 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -6,6 +6,9 @@ dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_FUNC_OBSTACK_PRINTF_POSIX],
 [
+  dnl Persuade glibc <stdio.h> to declare obstack_printf(), obstack_vprintf().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
   AC_REQUIRE([gl_PRINTF_SIZES_C99])
   AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
   AC_REQUIRE([gl_PRINTF_INFINITE])
@@ -20,61 +23,64 @@ AC_DEFUN([gl_FUNC_OBSTACK_PRINTF_POSIX],
   AC_REQUIRE([gl_PRINTF_PRECISION])
   AC_REQUIRE([gl_PRINTF_ENOMEM])
   gl_cv_func_obstack_printf_posix=no
-  case "$gl_cv_func_printf_sizes_c99" in
-    *yes)
-      case "$gl_cv_func_printf_long_double" in
-        *yes)
-          case "$gl_cv_func_printf_infinite" in
-            *yes)
-              case "$gl_cv_func_printf_infinite_long_double" in
-                *yes)
-                  case "$gl_cv_func_printf_directive_a" in
-                    *yes)
-                      case "$gl_cv_func_printf_directive_f" in
-                        *yes)
-                          case "$gl_cv_func_printf_directive_n" in
-                            *yes)
-                              case "$gl_cv_func_printf_positions" in
-                                *yes)
-                                  case "$gl_cv_func_printf_flag_grouping" in
-                                    *yes)
-                                      case "$gl_cv_func_printf_flag_leftadjust" in
-                                        *yes)
-                                          case "$gl_cv_func_printf_flag_zero" in
-                                            *yes)
-                                              case "$gl_cv_func_printf_precision" in
-                                                *yes)
-                                                  case "$gl_cv_func_printf_enomem" in
-                                                    *yes)
-                                                      # obstack_printf exists and is
-                                                      # already POSIX compliant.
-                                                      gl_cv_func_obstack_printf_posix= yes
-                                                      ;;
-                                                   esac
-                                                  ;;
-                                              esac
-                                              ;;
-                                          esac
-                                          ;;
-                                      esac
-                                      ;;
-                                  esac
-                                  ;;
-                              esac
-                              ;;
-                          esac
-                          ;;
-                      esac
-                      ;;
-                  esac
-                  ;;
-              esac
-              ;;
-          esac
-          ;;
-      esac
-      ;;
-  esac
+  AC_CHECK_FUNCS_ONCE([obstack_printf])
+  if test $ac_cv_func_obstack_printf = yes ; then
+    case "$gl_cv_func_printf_sizes_c99" in
+      *yes)
+        case "$gl_cv_func_printf_long_double" in
+          *yes)
+            case "$gl_cv_func_printf_infinite" in
+              *yes)
+                case "$gl_cv_func_printf_infinite_long_double" in
+                  *yes)
+                    case "$gl_cv_func_printf_directive_a" in
+                      *yes)
+                        case "$gl_cv_func_printf_directive_f" in
+                          *yes)
+                            case "$gl_cv_func_printf_directive_n" in
+                              *yes)
+                                case "$gl_cv_func_printf_positions" in
+                                  *yes)
+                                    case "$gl_cv_func_printf_flag_grouping" in
+                                      *yes)
+                                        case "$gl_cv_func_printf_flag_leftadjust" in
+                                          *yes)
+                                            case "$gl_cv_func_printf_flag_zero" in
+                                              *yes)
+                                                case "$gl_cv_func_printf_precision" in
+                                                  *yes)
+                                                    case "$gl_cv_func_printf_enomem" in
+                                                      *yes)
+                                                        # obstack_printf exists and is
+                                                        # already POSIX compliant.
+                                                        gl_cv_func_obstack_printf_posix=yes
+                                                        ;;
+                                                    esac
+                                                    ;;
+                                                esac
+                                                ;;
+                                            esac
+                                            ;;
+                                        esac
+                                        ;;
+                                    esac
+                                    ;;
+                                esac
+                                ;;
+                            esac
+                            ;;
+                        esac
+                        ;;
+                    esac
+                    ;;
+                esac
+                ;;
+            esac
+            ;;
+        esac
+        ;;
+    esac
+  fi
   if test $gl_cv_func_obstack_printf_posix = no; then
     gl_PREREQ_VASNPRINTF_LONG_DOUBLE
     gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE