Explanation:
  The MySQL configure script removes -Wall.
  -Wall implies -Wformat.
  If a user has, for example, -Wall and -Wformat-y2k set, but not -Wformat, this
  will work properly for her. But no longer when the configure script has
  removed -Wall. gcc (at least version 4.3.1) will issue a warning, because
  -Wformat-y2k will be ineffective without -Wformat (or -Wall, of course). This
  warning will be treated as an error, because the MySQL configure script adds
  -Werror. And all this results in wrong decisions made by the configure script.
  We can not simply add -Wformat, or replace -Wall with -Wformat, because this
  parameter may not be available. So we have to filter out all flags, which need
  -Wformat in order to work. (Or we could, of course, add some more
  sophisticated code lines.)
  -Wformat=0 causes breakage, too, of course.


diff -ur mysql.orig/config/ac-macros/misc.m4 mysql/config/ac-macros/misc.m4
--- mysql.orig/config/ac-macros/misc.m4	2007-12-14 20:43:25.000000000 +0000
+++ mysql/config/ac-macros/misc.m4	2008-06-22 20:09:29.000000000 +0000
@@ -38,7 +38,7 @@
 if test "$ac_cv_prog_gxx" = "yes"
 then
   # Add -Werror, remove -fbranch-probabilities (Bug #268)
-  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wcheck//'`
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wformat-y2k//; s/-Wformat-extra-args//; s/-Wformat-nonliteral//; s/-Wformat-security//; s/-Wcheck//'`
 fi
 mysql_cv_btype_last_arg_accept=none
 [AC_TRY_COMPILE([#if defined(inline)
@@ -98,7 +98,7 @@
 if test "$ac_cv_prog_gxx" = "yes"
 then
   # Add -Werror, remove -fbranch-probabilities (Bug #268)
-  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wcheck//'`
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wformat-y2k//; s/-Wformat-extra-args//; s/-Wformat-nonliteral//; s/-Wformat-security//; s/-Wcheck//'`
 fi
 mysql_cv_btype_struct_rlimit=none
 [AC_TRY_COMPILE([#if defined(inline)
diff -ur mysql.orig/configure.in mysql/configure.in
--- mysql.orig/configure.in	2008-06-22 19:59:12.000000000 +0000
+++ mysql/configure.in	2008-06-22 20:09:37.000000000 +0000
@@ -258,7 +258,7 @@
 # NM= "$NM -X64"
 #archive_expsym_cmds= `echo "$archive_expsym_cmds" | sed -e '/"$(CC)"//'`
 #archive_expsym_cmds= "$CC -q64 $archive_expsym_cmds"
-#  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
+#  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wformat-y2k//; s/-Wformat-extra-args//; s/-Wformat-nonliteral//; s/-Wformat-security//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
 
 #AC_LIBTOOL_DLOPEN AC_LIBTOOL_WIN32_DLL AC_DISABLE_FAST_INSTALL AC_DISABLE_SHARED AC_DISABLE_STATIC
 
@@ -2073,7 +2073,7 @@
 
 if test "$ac_cv_prog_gxx" = "yes" -a "$with_other_libc" = "no"
 then
-  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wformat-y2k//; s/-Wformat-extra-args//; s/-Wformat-nonliteral//; s/-Wformat-security//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
 fi
 
 AC_TRY_COMPILE(
@@ -2108,7 +2108,7 @@
 AC_LANG_CPLUSPLUS
 if test "$ac_cv_prog_gxx" = "yes" -a "$with_other_libc" = "no"
 then
-  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wformat-y2k//; s/-Wformat-extra-args//; s/-Wformat-nonliteral//; s/-Wformat-security//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
 fi
 AC_TRY_COMPILE(
 [#undef inline
@@ -2141,7 +2141,7 @@
 AC_LANG_CPLUSPLUS
 if test "$ac_cv_prog_gxx" = "yes" -a "$with_other_libc" = "no"
 then
-  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed -e 's/-fbranch-probabilities//; s/-Wall//; s/-Wformat-y2k//; s/-Wformat-extra-args//; s/-Wformat-nonliteral//; s/-Wformat-security//; s/-ansi//; s/-pedantic//; s/-Wcheck//'`
 fi
 AC_TRY_COMPILE(
 [#undef inline