diff --git a/configure/os/CONFIG.Common.linux-386 b/configure/os/CONFIG.Common.linux-386
index 063066f4d..9e9d3374c 100644
--- a/configure/os/CONFIG.Common.linux-386
+++ b/configure/os/CONFIG.Common.linux-386
@@ -10,10 +10,13 @@
 # Include definitions common to all linux x86 targets
 include $(CONFIG)/os/CONFIG.Common.linux-x86
 
-ARCH_DEP_CFLAGS = -march=i386
+ARCH_DEP_CFLAGS += -march=i386
 
 ifeq ($(BUILD_CLASS),CROSS)
-   VALID_BUILDS = Ioc
-   GNU_TARGET=i386-pc-linux-gnu
+  VALID_BUILDS = Ioc
 endif
 
+# If your crosscompiler name has a GNU target prefix like <gnutarget>-gcc,
+# e.g. i386-pc-linux-gnu-gcc, put a GNU_TARGET definition in
+# CONFIG_SITE.<host>.linux-386 file, e.g. GNU_TARGET=i386-pc-linux-gnu
+
diff --git a/configure/os/CONFIG.Common.linux-486 b/configure/os/CONFIG.Common.linux-486
index d3448419c..6a39e52db 100644
--- a/configure/os/CONFIG.Common.linux-486
+++ b/configure/os/CONFIG.Common.linux-486
@@ -10,10 +10,13 @@
 # Include definitions common to all linux x86 targets
 include $(CONFIG)/os/CONFIG.Common.linux-x86
 
-ARCH_DEP_CFLAGS = -march=i486
+ARCH_DEP_CFLAGS += -march=i486
 
 ifeq ($(BUILD_CLASS),CROSS)
    VALID_BUILDS = Ioc
-   GNU_TARGET=i486-pc-linux-gnu
 endif
 
+# If your crosscompiler name has a GNU target prefix like <gnutarget>-gcc,
+# e.g. i486-pc-linux-gnu-gcc, put a GNU_TARGET definition in
+# CONFIG_SITE.<host>.linux-486 file, e.g. GNU_TARGET=i486-pc-linux-gnu
+
diff --git a/configure/os/CONFIG.Common.linux-586 b/configure/os/CONFIG.Common.linux-586
index 3728f4555..b1dc3bfbc 100644
--- a/configure/os/CONFIG.Common.linux-586
+++ b/configure/os/CONFIG.Common.linux-586
@@ -10,11 +10,15 @@
 # Include definitions common to all linux x86 targets
 include $(CONFIG)/os/CONFIG.Common.linux-x86
 
-# i586 is euivalent to pentiumpro
-ARCH_DEP_CFLAGS = -march=i586
+# i586 is equivalent to pentium
+ARCH_DEP_CFLAGS += -march=i586
 
 ifeq ($(BUILD_CLASS),CROSS)
    VALID_BUILDS = Ioc
-   GNU_TARGET=i586-pc-linux-gnu
 endif
 
+# If your crosscompiler name has a GNU target prefix like <gnutarget>-gcc,
+# e.g. i586-pc-linux-gnu-gcc, put a GNU_TARGET definition in
+# CONFIG_SITE.<host>.linux-586 file, e.g. GNU_TARGET=i586-pc-linux-gnu
+
+
diff --git a/configure/os/CONFIG.Common.linux-686 b/configure/os/CONFIG.Common.linux-686
index 758a1168b..b00b0a173 100644
--- a/configure/os/CONFIG.Common.linux-686
+++ b/configure/os/CONFIG.Common.linux-686
@@ -11,10 +11,13 @@
 include $(CONFIG)/os/CONFIG.Common.linux-x86
 
 # i686 is euivalent to pentiumpro
-ARCH_DEP_CFLAGS = -march=i686
+ARCH_DEP_CFLAGS += -march=i686
 
 ifeq ($(BUILD_CLASS),CROSS)
    VALID_BUILDS = Ioc
-   GNU_TARGET=i686-pc-linux-gnu
 endif
 
+# If your crosscompiler name has a GNU target prefix like <gnutarget>-gcc,
+# e.g. i686-pc-linux-gnu-gcc, put a GNU_TARGET definition in
+# CONFIG_SITE.<host>.linux-686 file, e.g. GNU_TARGET=i686-pc-linux-gnu
+