diff --git a/env-gcc-8.4.sh b/env-gcc-8.4.sh
new file mode 100755
index 000000000..ed9e4dd2a
--- /dev/null
+++ b/env-gcc-8.4.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# Look for GCC-8.4
+x=`which gcc-8.4 2>/dev/null`
+if [ -n "$x" ]; then
+    gdir=`dirname $x`
+elif [ -f "/usr/gcc-8.4/bin/gcc" ]; then
+    gdir="/usr/gcc-8.4/bin"
+else
+    echo Cannot find GCC 8.4
+    exit 1
+fi
+
+echo GCC is in $gdir
+
+export CC="$gdir/gcc"
+export CPP="$gdir/cpp"
+export CXX="$gdir/g++"
+export PATH="$gdir:$PATH"
+
+echo Starting subshell. Type exit to exit.
+
+$SHELL
+
diff --git a/env-gcc-9.3.sh b/env-gcc-9.3.sh
new file mode 100755
index 000000000..3ac5c8715
--- /dev/null
+++ b/env-gcc-9.3.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# Look for GCC-9.3
+x=`which gcc-9.3 2>/dev/null`
+if [ -n "$x" ]; then
+    gdir=`dirname $x`
+elif [ -f "/usr/gcc-9.3/bin/gcc" ]; then
+    gdir="/usr/gcc-9.3/bin"
+else
+    echo Cannot find GCC 9.3
+    exit 1
+fi
+
+echo GCC is in $gdir
+
+export CC="$gdir/gcc"
+export CPP="$gdir/cpp"
+export CXX="$gdir/g++"
+export PATH="$gdir:$PATH"
+
+echo Starting subshell. Type exit to exit.
+
+$SHELL
+