Index: ext/libicpf/src/libicpf/libicpf.vc90.vcproj
===================================================================
diff -u -N -r68147af121d76b78d924a8b62d9793578c81b9e4 -r4c06fdbee6be461a9997de3d5b7a8f63e5944757
--- ext/libicpf/src/libicpf/libicpf.vc90.vcproj	(.../libicpf.vc90.vcproj)	(revision 68147af121d76b78d924a8b62d9793578c81b9e4)
+++ ext/libicpf/src/libicpf/libicpf.vc90.vcproj	(.../libicpf.vc90.vcproj)	(revision 4c06fdbee6be461a9997de3d5b7a8f63e5944757)
@@ -54,6 +54,7 @@
 				UsePrecompiledHeader="0"
 				ProgramDataBaseFileName="$(IntDir)\$(TargetName)_vs90.pdb"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="4"
 			/>
 			<Tool
@@ -136,6 +137,7 @@
 				UsePrecompiledHeader="0"
 				ProgramDataBaseFileName="$(IntDir)\$(TargetName)_vs90.pdb"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool
@@ -211,6 +213,7 @@
 				UsePrecompiledHeader="0"
 				ProgramDataBaseFileName="$(IntDir)\$(TargetName)_vs90.pdb"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool
@@ -291,6 +294,7 @@
 				UsePrecompiledHeader="0"
 				ProgramDataBaseFileName="$(IntDir)\$(TargetName)_vs90.pdb"
 				WarningLevel="4"
+				WarnAsError="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool