From b0afb8fe0ff1d87165af9df61501197a06240dda Mon Sep 17 00:00:00 2001
From: Lorenz Kästle <12514511+RincewindsHat@users.noreply.github.com>
Date: Sun, 28 Dec 2025 12:13:40 +0100
Subject: Sync with Gnulib stable-202507 code (a8ac9f9ce5)

---
 gl/m4/fpurge.m4 | 94 ++++++++++++++++++++++++++++-----------------------------
 1 file changed, 47 insertions(+), 47 deletions(-)

(limited to 'gl/m4/fpurge.m4')

diff --git a/gl/m4/fpurge.m4 b/gl/m4/fpurge.m4
index a77f5b96..408a2579 100644
--- a/gl/m4/fpurge.m4
+++ b/gl/m4/fpurge.m4
@@ -1,65 +1,65 @@
 # fpurge.m4
-# serial 14
-dnl Copyright (C) 2007, 2009-2024 Free Software Foundation, Inc.
+# serial 16
+dnl Copyright (C) 2007, 2009-2025 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
+dnl This file is offered as-is, without any warranty.
 
 AC_DEFUN([gl_FUNC_FPURGE],
 [
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CHECK_HEADERS_ONCE([stdio_ext.h])
   AC_CHECK_FUNCS_ONCE([fpurge])
   gl_CHECK_FUNCS_ANDROID([__fpurge], [[#include <stdio_ext.h>]])
   AC_CHECK_DECLS([fpurge], , , [[#include <stdio.h>]])
-  if test "x$ac_cv_func_fpurge" = xyes; then
+  if test $ac_cv_func_fpurge = yes; then
     HAVE_FPURGE=1
     # Detect BSD bug.  Only cygwin 1.7 and musl are known to be immune.
     AC_CACHE_CHECK([whether fpurge works], [gl_cv_func_fpurge_works],
-      [AC_RUN_IFELSE(
-         [AC_LANG_PROGRAM(
-            [[#include <stdio.h>
-]],
-            [[FILE *f = fopen ("conftest.txt", "w+");
-              if (!f)
-                return 1;
-              if (fputc ('a', f) != 'a')
-                { fclose (f); return 2; }
-              rewind (f);
-              if (fgetc (f) != 'a')
-                { fclose (f); return 3; }
-              if (fgetc (f) != EOF)
-                { fclose (f); return 4; }
-              if (fpurge (f) != 0)
-                { fclose (f); return 5; }
-              if (putc ('b', f) != 'b')
-                { fclose (f); return 6; }
-              if (fclose (f) != 0)
-                return 7;
-              if ((f = fopen ("conftest.txt", "r")) == NULL)
-                return 8;
-              if (fgetc (f) != 'a')
-                { fclose (f); return 9; }
-              if (fgetc (f) != 'b')
-                { fclose (f); return 10; }
-              if (fgetc (f) != EOF)
-                { fclose (f); return 11; }
-              if (fclose (f) != 0)
-                return 12;
-              if (remove ("conftest.txt") != 0)
-                return 13;
-              return 0;
-            ]])],
-         [gl_cv_func_fpurge_works=yes],
-         [gl_cv_func_fpurge_works=no],
-         [case "$host_os" in
-                                # Guess yes on musl systems.
-            *-musl* | midipix*) gl_cv_func_fpurge_works="guessing yes" ;;
-                                # Otherwise obey --enable-cross-guesses.
-            *)                  gl_cv_func_fpurge_works="$gl_cross_guess_normal" ;;
-          esac
-         ])
+      [if test $ac_cv_have_decl_fpurge = yes; then
+         AC_RUN_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <stdio.h>
+              ]],
+              [[FILE *f = fopen ("conftest.txt", "w+");
+                if (!f)
+                  return 1;
+                if (fputc ('a', f) != 'a')
+                  { fclose (f); return 2; }
+                rewind (f);
+                if (fgetc (f) != 'a')
+                  { fclose (f); return 3; }
+                if (fgetc (f) != EOF)
+                  { fclose (f); return 4; }
+                if (fpurge (f) != 0)
+                  { fclose (f); return 5; }
+                if (putc ('b', f) != 'b')
+                  { fclose (f); return 6; }
+                if (fclose (f) != 0)
+                  return 7;
+                if ((f = fopen ("conftest.txt", "r")) == NULL)
+                  return 8;
+                if (fgetc (f) != 'a')
+                  { fclose (f); return 9; }
+                if (fgetc (f) != 'b')
+                  { fclose (f); return 10; }
+                if (fgetc (f) != EOF)
+                  { fclose (f); return 11; }
+                if (fclose (f) != 0)
+                  return 12;
+                if (remove ("conftest.txt") != 0)
+                  return 13;
+                return 0;
+              ]])],
+           [gl_cv_func_fpurge_works=yes],
+           [gl_cv_func_fpurge_works=no],
+           [# Obey --enable-cross-guesses.
+            gl_cv_func_fpurge_works="$gl_cross_guess_normal"
+           ])
+       else
+         gl_cv_func_fpurge_works=no
+       fi
       ])
     case "$gl_cv_func_fpurge_works" in
       *yes) ;;
-- 
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