Index: configure.in
===================================================================
--- configure.in	(revision 57620)
+++ configure.in	(working copy)
@@ -818,7 +818,45 @@
 	    ;;
 	# is there any other compiler on Darwin besides gcc?
 	Darwin*)
-	    BASECFLAGS="$BASECFLAGS -Wno-long-double -no-cpp-precomp -mno-fused-madd"
+	    BASECFLAGS="$BASECFLAGS -mno-fused-madd"
+
+	    # Earlier versions of Xcode/DeveloperTools shipped with GCC 3.x
+	    # which warned about using "long double". That warning is 
+	    # surpressed using -Wno-long-double, but that flag is not 
+	    # available in stock GCC
+	    AC_MSG_CHECKING(whether $CC accepts -Wno-long-double)
+	    ac_save_cc="${CC}"
+	    CC="${CC} -Wno-long-double"
+	    AC_TRY_RUN([int main(void) { return 0; }],
+	    	ac_cv_no_long_double_ok=yes,
+	    	ac_cv_no_long_double_ok=no,
+	    	ac_cv_no_long_double_ok=no)
+	    CC="$ac_save_cc"
+	    AC_MSG_RESULT($ac_cv_no_long_double_ok)
+	    if test $ac_cv_no_long_double_ok = yes; then
+	        BASECFLAGS="$BASECFLAGS -Wno-long-double"
+            fi
+
+	    # Even earlier versions of Apple's GCC (appearently before 
+	    # GCC 3.1) sported a broken implementation of precompiled headers,
+	    # -no-cpp-precomp disables that functionality, but isn't supported
+	    # by stock GCC.
+	    # XXX: need to check which version of OSX/DeveloperTools ships
+	    # with this broken version of GCC, if that's old enough we can
+	    # drop this check.
+	    AC_MSG_CHECKING(whether $CC accepts -no-cpp-precomp)
+	    ac_save_cc="${CC}"
+	    CC="${CC} -no-cpp-precomp"
+	    AC_TRY_RUN([int main(void) { return 0; }],
+	    	ac_cv_no_precomp_ok=yes,
+	    	ac_cv_no_precomp_ok=no,
+	    	ac_cv_no_precomp_ok=no)
+	    CC="$ac_save_cc"
+	    AC_MSG_RESULT($ac_cv_no_precomp_ok)
+	    if test $ac_cv_no_precomp_ok = yes; then
+	        BASECFLAGS="$BASECFLAGS -no-cpp-precomp"
+            fi
+
 	    if test "${enable_universalsdk}"; then
 		BASECFLAGS="-arch ppc -arch i386 -isysroot ${UNIVERSALSDK} ${BASECFLAGS}"
 	    fi