diff --git a/configure/os/CONFIG.Common.SL5-x86 b/configure/os/CONFIG.Common.SL5-x86
new file mode 100644
index 000000000..87ee7ebb2
--- /dev/null
+++ b/configure/os/CONFIG.Common.SL5-x86
@@ -0,0 +1,2 @@
+# Include definitions common to linux pentium targets
+include $(CONFIG)/os/CONFIG.Common.linux-686
diff --git a/configure/os/CONFIG.Common.T2-ppc604 b/configure/os/CONFIG.Common.T2-ppc604
new file mode 100644
index 000000000..13ee977d6
--- /dev/null
+++ b/configure/os/CONFIG.Common.T2-ppc604
@@ -0,0 +1,8 @@
+include $(CONFIG)/os/CONFIG.Common.vxWorks-ppc604_long
+VXWORKS_VERSION = 5.5
+WIND_BASE = /usr/local/Tornado2
+
+#there is a problem with our ccppc and optimization
+# -O and -O0 work, -O1 and higher are buggy
+OPT_CFLAGS_YES = -O
+OPT_CXXFLAGS_YES = -O
diff --git a/configure/os/CONFIG.SL5-x86.Common b/configure/os/CONFIG.SL5-x86.Common
new file mode 100644
index 000000000..cc10355d3
--- /dev/null
+++ b/configure/os/CONFIG.SL5-x86.Common
@@ -0,0 +1,3 @@
+#CONFIG.$(EPICS_HOST_ARCH).Common is required by build system
+#Include definitions common to linux hosts
+include $(CONFIG)/os/CONFIG.linux-x86.Common
diff --git a/configure/os/CONFIG.SL5-x86.SL5-x86 b/configure/os/CONFIG.SL5-x86.SL5-x86
new file mode 100644
index 000000000..2bf7aace1
--- /dev/null
+++ b/configure/os/CONFIG.SL5-x86.SL5-x86
@@ -0,0 +1,2 @@
+# Include common linux definitions
+include $(CONFIG)/os/CONFIG.linux-x86.linux-x86
diff --git a/configure/os/CONFIG_SITE.SL5-x86.Common b/configure/os/CONFIG_SITE.SL5-x86.Common
new file mode 100644
index 000000000..e805e8e43
--- /dev/null
+++ b/configure/os/CONFIG_SITE.SL5-x86.Common
@@ -0,0 +1,2 @@
+include $(CONFIG)/os/CONFIG_SITE.linux-x86.Common
+CROSS_COMPILER_TARGET_ARCHS += T2-ppc604