diff -r 5f4402180204 -r e3974e7360e9 AMBuildScript
--- a/AMBuildScript	Wed Jul 25 00:48:08 2012 -0700
+++ b/AMBuildScript	Wed Jul 25 01:30:33 2012 -0700
@@ -54,11 +54,14 @@
 				self.compiler.AddToListVar('CXXFLAGS', '-Wno-invalid-offsetof')
 
 				# This would otherwise forbid ((x = y) == NULL) in clang apparently.
-				self.compiler.AddToListVar('CXXFLAGS', '-Wno-null-arithmetic')
+				if self.vendor == 'clang':
+					self.compiler.AddToListVar('CXXFLAGS', '-Wno-null-arithmetic')
 
 				if (self.vendor == 'gcc' and cxx.majorVersion >= 4 and cxx.minorVersion >= 7) or \
 						(self.vendor == 'clang' and cxx.majorVersion >= 3):
 					self.compiler.AddToListVar('CXXFLAGS', '-Wno-delete-non-virtual-dtor')
+
+				self.compiler.AddToListVar('POSTLINKFLAGS', '-lm')
 			elif isinstance(cxx, Cpp.MSVC):
 				self.vendor = 'msvc'
 				if AMBuild.options.debug == '1':