diff --git a/etc/config/settings.csh b/etc/config/settings.csh
index 244e52fdcf..dad1d03f7e 100644
--- a/etc/config/settings.csh
+++ b/etc/config/settings.csh
@@ -217,20 +217,6 @@ case ThirdParty:
     switch ("$WM_COMPILER")
     case Gcc:
     case Gcc++0x:
-    case Gcc46:
-    case Gcc46++0x:
-        set gcc_version=gcc-4.6.1
-        set gmp_version=gmp-5.0.4
-        set mpfr_version=mpfr-3.1.0
-        set mpc_version=mpc-0.9
-        breaksw
-    case Gcc49:
-    case Gcc49++0x:
-        set gcc_version=gcc-4.9.0
-        set gmp_version=gmp-5.1.2
-        set mpfr_version=mpfr-3.1.2
-        set mpc_version=mpc-1.0.1
-        breaksw
     case Gcc48:
     case Gcc48++0x:
         set gcc_version=gcc-4.8.2
@@ -238,19 +224,12 @@ case ThirdParty:
         set mpfr_version=mpfr-3.1.2
         set mpc_version=mpc-1.0.1
         breaksw
-    case Gcc47:
-    case Gcc47++0x:
-        set gcc_version=gcc-4.7.2
-        set gmp_version=gmp-5.0.4
-        set mpfr_version=mpfr-3.1.0
-        set mpc_version=mpc-0.9
-        breaksw
-    case Gcc45:
-    case Gcc45++0x:
-        set gcc_version=gcc-4.5.2
-        set gmp_version=gmp-5.0.1
-        set mpfr_version=mpfr-2.4.2
-        set mpc_version=mpc-0.8.1
+    case Gcc49:
+    case Gcc49++0x:
+        set gcc_version=gcc-4.9.0
+        set gmp_version=gmp-5.1.2
+        set mpfr_version=mpfr-3.1.2
+        set mpc_version=mpc-1.0.1
         breaksw
     case Clang:
         # using clang - not gcc
diff --git a/etc/config/settings.sh b/etc/config/settings.sh
index 4fa9120ec1..ec2dcf20e6 100644
--- a/etc/config/settings.sh
+++ b/etc/config/settings.sh
@@ -240,11 +240,11 @@ fi
 case "${foamCompiler}" in
 OpenFOAM | ThirdParty)
     case "$WM_COMPILER" in
-    Gcc | Gcc++0x | Gcc46 | Gcc46++0x)
-        gcc_version=gcc-4.6.1
-        gmp_version=gmp-5.0.4
-        mpfr_version=mpfr-3.1.0
-        mpc_version=mpc-0.9
+    Gcc | Gcc++0x | Gcc48 | Gcc48++0x)
+        gcc_version=gcc-4.8.2
+        gmp_version=gmp-5.1.2
+        mpfr_version=mpfr-3.1.2
+        mpc_version=mpc-1.0.1
         ;;
     Gcc49 | Gcc49++0x)
         gcc_version=gcc-4.9.0
@@ -252,24 +252,6 @@ OpenFOAM | ThirdParty)
         mpfr_version=mpfr-3.1.2
         mpc_version=mpc-1.0.1
         ;;
-    Gcc48 | Gcc48++0x)
-        gcc_version=gcc-4.8.2
-        gmp_version=gmp-5.1.2
-        mpfr_version=mpfr-3.1.2
-        mpc_version=mpc-1.0.1
-        ;;
-    Gcc47 | Gcc47++0x)
-        gcc_version=gcc-4.7.2
-        gmp_version=gmp-5.0.4
-        mpfr_version=mpfr-3.1.0
-        mpc_version=mpc-0.9
-        ;;
-    Gcc45 | Gcc45++0x)
-        gcc_version=gcc-4.5.2
-        gmp_version=gmp-5.0.1
-        mpfr_version=mpfr-2.4.2
-        mpc_version=mpc-0.8.1
-        ;;
     Clang)
         # using clang - not gcc
         export WM_CC='clang'