X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=m4%2Fgetline.m4;h=83005600d65b23657095a15d8b6d246d62f8da0e;hb=22f1eb8bc17e5be72dd23d42d6aaa60196ac22e6;hp=57625da5c9d7f5d6279ef8d2826c3ece3f3aa4b7;hpb=138fc7e67e3d9845cd7d81aad0e9c7724784f9b9;p=tar

diff --git a/m4/getline.m4 b/m4/getline.m4
index 57625da..8300560 100644
--- a/m4/getline.m4
+++ b/m4/getline.m4
@@ -1,7 +1,7 @@
-# getline.m4 serial 18
+# getline.m4 serial 21
 
-dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007 Free
-dnl Software Foundation, Inc.
+dnl Copyright (C) 1998-2003, 2005-2007, 2009-2010 Free Software Foundation,
+dnl Inc.
 dnl
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -10,7 +10,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_PREREQ([2.59])
 
 dnl See if there's a working, system-supplied version of the getline function.
-dnl We can't just do AC_REPLACE_FUNCS(getline) because some systems
+dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
 dnl have a function by that name in -linet that doesn't have anything
 dnl to do with the function we need.
 AC_DEFUN([gl_FUNC_GETLINE],
@@ -23,30 +23,43 @@ AC_DEFUN([gl_FUNC_GETLINE],
   AC_CHECK_DECLS_ONCE([getline])
 
   gl_getline_needs_run_time_check=no
-  AC_CHECK_FUNC(getline,
-		dnl Found it in some library.  Verify that it works.
-		gl_getline_needs_run_time_check=yes,
-		am_cv_func_working_getline=no)
+  AC_CHECK_FUNC([getline],
+                [dnl Found it in some library.  Verify that it works.
+                 gl_getline_needs_run_time_check=yes],
+                [am_cv_func_working_getline=no])
   if test $gl_getline_needs_run_time_check = yes; then
-    AC_CACHE_CHECK([for working getline function], am_cv_func_working_getline,
-    [echo fooN |tr -d '\012'|tr N '\012' > conftest.data
-    AC_TRY_RUN([
+    AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
+    [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
+    AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #    include <stdio.h>
 #    include <stdlib.h>
 #    include <string.h>
     int main ()
-    { /* Based on a test program from Karl Heuer.  */
-      char *line = NULL;
-      size_t siz = 0;
-      int len;
+    {
       FILE *in = fopen ("./conftest.data", "r");
       if (!in)
-	return 1;
-      len = getline (&line, &siz, in);
-      exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
+        return 1;
+      {
+        /* Test result for a NULL buffer and a zero size.
+           Based on a test program from Karl Heuer.  */
+        char *line = NULL;
+        size_t siz = 0;
+        int len = getline (&line, &siz, in);
+        if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
+          return 1;
+      }
+      {
+        /* Test result for a NULL buffer and a non-zero size.
+           This crashes on FreeBSD 8.0.  */
+        char *line = NULL;
+        size_t siz = (size_t)(~0) / 4;
+        if (getline (&line, &siz, in) == -1)
+          return 1;
+      }
+      return 0;
     }
-    ], am_cv_func_working_getline=yes dnl The library version works.
-    , am_cv_func_working_getline=no dnl The library version does NOT work.
+    ]])], [am_cv_func_working_getline=yes] dnl The library version works.
+    , [am_cv_func_working_getline=no] dnl The library version does NOT work.
     , dnl We're cross compiling. Assume it works on glibc2 systems.
       [AC_EGREP_CPP([Lucky GNU user],
          [
@@ -67,6 +80,9 @@ AC_DEFUN([gl_FUNC_GETLINE],
   fi
 
   if test $am_cv_func_working_getline = no; then
+    dnl Set REPLACE_GETLINE always: Even if we have not found the broken
+    dnl getline function among $LIBS, it may exist in libinet and the
+    dnl executable may be linked with -linet.
     REPLACE_GETLINE=1
     AC_LIBOBJ([getline])