=== modified file 'configure.ac'
--- configure.ac	2014-03-20 20:49:46 +0000
+++ configure.ac	2014-03-22 11:22:16 +0000
@@ -96,7 +96,31 @@
   # Test for -Werror=... (introduced some time post-4.0)
   AC_MSG_CHECKING([compiler support for -Werror=...])
   ink_svd_CPPFLAGS="$CPPFLAGS"
-  CPPFLAGS="-Werror=format-security -Werror=switch -Werror=return-type $CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wno-error=unused-function"                                # src/util/units.cpp:53
+  ink_werror_CPPFLAGS="-Wno-error=return-type $ink_werror_CPPFLAGS"               # src/ui/tool/node.cpp:1220
+  ink_werror_CPPFLAGS="-Wno-error=gnu $ink_werror_CPPFLAGS"                       # src/display/nr-filter-turbulence.cpp:291
+  ink_werror_CPPFLAGS="-Wno-error=mismatched-tags $ink_werror_CPPFLAGS"           # $PREFIX/include/gtkmm-2.4/gtkmm/papersize.h:290
+  ink_werror_CPPFLAGS="-Wno-error=deprecated-declarations $ink_werror_CPPFLAGS"   # src/gc.cpp:31
+  ink_werror_CPPFLAGS="-Wno-error=uninitialized $ink_werror_CPPFLAGS"             # src/libuemf/upmf.c:3096
+  ink_werror_CPPFLAGS="-Wno-error=self-assign $ink_werror_CPPFLAGS"               # src/libuemf/uemf_endian.c:428
+  ink_werror_CPPFLAGS="-Wno-error=parentheses-equality $ink_werror_CPPFLAGS"      # src/libcroco/cr-parser.c:2433
+  ink_werror_CPPFLAGS="-Wno-error=tautological-compare $ink_werror_CPPFLAGS"      # $PREFIX/include/lcms.h:1418
+  ink_werror_CPPFLAGS="-Wno-error=cast-align $ink_werror_CPPFLAGS"                # plenty of warnings from inkscape with clang
+  ink_werror_CPPFLAGS="-Wno-error=format-extra-args $ink_werror_CPPFLAGS" 
+  ink_werror_CPPFLAGS="-Wno-error=format $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wno-error=write-strings $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wno-error=strict-overflow $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wno-error=unused-but-set-variable  $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wno-error=unused-parameter $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wno-error=pointer-sign $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Werror $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Werror=format-security $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Werror=switch $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Werror=return-type $ink_werror_CPPFLAGS"
+  ink_werror_CPPFLAGS="-Wsign-compare $ink_werror_CPPFLAGS"                       # was set later for CXXFLAGS (line 1034)
+  ink_werror_CPPFLAGS="-Wcast-align $ink_werror_CPPFLAGS"                         # was set later for CXXFLAGS (line 1034)
+  ink_werror_CPPFLAGS="-Wpointer-arith $ink_werror_CPPFLAGS"                      # was set later for CXXFLAGS (line 1034)
+  CPPFLAGS="$CPPFLAGS $ink_werror_CPPFLAGS"
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], [ink_opt_ok=yes], [ink_opt_ok=no])
   AC_MSG_RESULT([$ink_opt_ok])
   if test "x$ink_opt_ok" != "xyes"; then
@@ -982,14 +1006,6 @@
 AC_STRUCT_TM
 AC_TYPE_MODE_T
 
-dnl Work around broken gcc 3.3 (seen on OSX) where "ENABLE_NLS" isn't
-dnl set correctly because the gettext function isn't noticed.
-if test "$ac_cv_header_libintl_h" = "yes" &&
-   test "$ac_cv_func_bind_textdomain_codeset" = "yes"  &&
-   test "$gt_cv_func_have_gettext" != "yes"; then
-    AC_DEFINE([ENABLE_NLS], [], [Description])
-fi
-
 dnl ******************************
 dnl   Compilation warnings
 dnl ******************************
@@ -1015,7 +1031,7 @@
   # as a callback or similar function pointer use).
 
   # Add even more stuff
-  CXXFLAGS="-Wpointer-arith -Wcast-align -Wsign-compare -Woverloaded-virtual -Wswitch $CXXFLAGS"
+  CXXFLAGS="-Woverloaded-virtual $CXXFLAGS"
 
 fi
 

=== modified file 'src/display/drawing-item.h'
--- src/display/drawing-item.h	2014-03-13 22:37:07 +0000
+++ src/display/drawing-item.h	2014-03-22 10:52:03 +0000
@@ -16,7 +16,24 @@
 #include <exception>
 #include <boost/operators.hpp>
 #include <boost/utility.hpp>
+
+// suppress excessive cast-lign warnings with clang
+#if defined __GNUC__
+#pragma GCC system_header
+#elif defined __SUNPRO_CC
+#pragma disable_warn
+#elif defined _MSC_VER
+#pragma warning(push, 1)
+#endif
+
 #include <boost/intrusive/list.hpp>
+
+#if defined __SUNPRO_CC
+#pragma enable_warn
+#elif defined _MSC_VER
+#pragma warning(pop)
+#endif
+
 #include <2geom/rect.h>
 #include <2geom/affine.h>