bug-gnulib
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

cross-compilation guesses (11)


From: Bruno Haible
Subject: cross-compilation guesses (11)
Date: Sat, 05 May 2012 11:48:34 +0200
User-agent: KMail/4.7.4 (Linux/3.1.10-1.9-desktop; KDE/4.7.4; x86_64; ; )

I'm seeing this wrong guess on a glibc system:

  checking whether ungetc works on arbitrary bytes... guessing no


2012-05-05  Bruno Haible  <address@hidden>

        fseeko-tests, ftello-tests: Avoid "guessing no" when cross-compiling.
        * m4/ungetc.m4 (gl_FUNC_UNGETC_WORKS): Require AC_CANONICAL_HOST. When
        cross-compiling to a glibc platform, set gl_cv_func_ungetc_works to
        "guessing yes".

--- m4/ungetc.m4.orig   Sat May  5 11:46:51 2012
+++ m4/ungetc.m4        Sat May  5 08:51:16 2012
@@ -1,4 +1,4 @@
-# ungetc.m4 serial 2
+# ungetc.m4 serial 3
 dnl Copyright (C) 2009-2012 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,7 @@
 AC_DEFUN_ONCE([gl_FUNC_UNGETC_WORKS],
 [
   AC_REQUIRE([AC_PROG_CC])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
 
   AC_CACHE_CHECK([whether ungetc works on arbitrary bytes],
     [gl_cv_func_ungetc_works],
@@ -27,10 +28,19 @@
            if (fgetc (f) != 'c') return 11;
            fclose (f); remove ("conftest.tmp");])],
         [gl_cv_func_ungetc_works=yes], [gl_cv_func_ungetc_works=no],
-        [gl_cv_func_ungetc_works='guessing no'])
+        [case "$host_os" in
+                   # Guess yes on glibc systems.
+           *-gnu*) gl_cv_func_ungetc_works="guessing yes" ;;
+                   # If we don't know, assume the worst.
+           *)      gl_cv_func_ungetc_works="guessing no" ;;
+         esac
+        ])
     ])
-  if test "$gl_cv_func_ungetc_works" != yes; then
-    AC_DEFINE([FUNC_UNGETC_BROKEN], [1],
-      [Define to 1 if ungetc is broken when used on arbitrary bytes.])
-  fi
+  case "$gl_cv_func_ungetc_works" in
+    *yes) ;;
+    *)
+      AC_DEFINE([FUNC_UNGETC_BROKEN], [1],
+        [Define to 1 if ungetc is broken when used on arbitrary bytes.])
+      ;;
+  esac
 ])




reply via email to

[Prev in Thread] Current Thread [Next in Thread]