diff --git a/m4/ri-gcc-warnings.m4 b/m4/ri-gcc-warnings.m4
deleted file mode 100644
index 2201d4e44..000000000
--- a/m4/ri-gcc-warnings.m4
+++ /dev/null
@@ -1,83 +0,0 @@
-dnl ri_GCC_WARNINGS()
-dnl
-dnl Adjust the CPPFLAGS, CFLAGS and CXXFLAGS for various GCC versions
-
-AC_DEFUN([ri_GCC_WARNINGS],
-[AC_ARG_ENABLE([gcc-warnings],
-               [AC_HELP_STRING([--enable-gcc-warnings[[[[=error]]]]],
-                               [enable additional gcc warning flags])])
-
-if test x"$GCC" = x"yes"; then
-if test x"$enable_gcc_warnings" = x"yes" -o x"$enable_gcc_warnings" = x"error"; then
-  ri_gcc_main=`echo __GNUC__ | $CPP -E - | grep -v ^\#`
-  ri_gcc_minor=`echo __GNUC_MINOR__ | $CPP -E - | grep -v ^\#`
-  
-  ri_cppflags=""
-  ri_cflags=""
-  ri_cxxflags=""
-  ri_bothflags=""
-
-  ri_gcc_v2_95="false"
-  test $ri_gcc_main -gt 2 && ri_gcc_v2_95="true"
-  test $ri_gcc_main -eq 2 && test $ri_gcc_minor -ge 95 && ri_gcc_v2_95="true"
-
-  ri_gcc_v3_2="false"
-  test $ri_gcc_main -gt 3 && ri_gcc_v3_2="true"
-  test $ri_gcc_main -eq 3 && test $ri_gcc_minor -ge 2 && ri_gcc_v3_2="true"
-
-  ri_gcc_v3_3="false"
-  test $ri_gcc_main -gt 3 && ri_gcc_v3_3="true"
-  test $ri_gcc_main -eq 3 && test $ri_gcc_minor -ge 3 && ri_gcc_v3_3="true"
-
-  ri_gcc_v3_4="false"
-  test $ri_gcc_main -gt 3 && ri_gcc_v3_4="true"
-  test $ri_gcc_main -eq 3 && test $ri_gcc_minor -ge 4 && ri_gcc_v3_4="true"
-
-  if $ri_gcc_v3_4; then
-    ri_bothflags="-Wextra -Wall -pedantic"
-  else
-    ri_bothflags="-W -Wall -pedantic"
-  fi
-
-  if $ri_gcc_v2_95; then
-    # the following options are taken from the gcc-2.95 info page
-    ri_bothflags="$ri_bothflags -Wcast-align"
-    ri_bothflags="$ri_bothflags -Wcast-qual"
-    ri_bothflags="$ri_bothflags -Wmissing-prototypes"
-    ri_bothflags="$ri_bothflags -Wmultichar"
-    ri_bothflags="$ri_bothflags -Wpointer-arith"
-    ri_bothflags="$ri_bothflags -Wredundant-decls"
-    ri_bothflags="$ri_bothflags -Wshadow"
-    ri_bothflags="$ri_bothflags -Wsign-compare"
-    ri_bothflags="$ri_bothflags -Wundef"
-    ri_bothflags="$ri_bothflags -Wwrite-strings"
-    ri_cflags="$ri_cflags -Waggregate-return"
-    ri_cflags="$ri_cflags -Wbad-function-cast"
-    ri_cflags="$ri_cflags -Wmissing-declarations"
-    ri_cflags="$ri_cflags -Wnested-externs"
-    ri_cflags="$ri_cflags -Wstrict-prototypes"
-    ri_cflags="$ri_cflags -Wmissing-declarations"
-  fi
-
-  if $ri_gcc_v3_2; then
-    # the following options are taken from the gcc-3.2.1 info page
-    ri_cflags="$ri_cflags -Wdiv-by-zero"
-    ri_bothflags="$ri_bothflags -Wfloat-equal"
-  fi
-
-  if $ri_gcc_v3_3; then
-    # the following options are taken from the gcc-3.3.2 info page
-    ri_cppflags="$ri_cppflags -Wendif-labels"
-    ri_bothflags="$ri_bothflags -Wdisabled-optimization"
-  fi
-
-  if test x"$enable_gcc_warnings" = x"error"; then
-    ri_bothflags="$ri_bothflags -Werror"
-  fi
-
-  CPPFLAGS="$CPPFLAGS $ri_cppflags"
-  CFLAGS="$ri_bothflags $ri_cflags $CFLAGS"
-  CXXFLAGS="$ri_bothflags $ri_cxxflags $CXXFLAGS"
-fi
-fi
-])