diff --git a/configure/os/CONFIG.Common.RHEL8-x86_64 b/configure/os/CONFIG.Common.RHEL8-x86_64
new file mode 100644
index 000000000..bd59bbd0d
--- /dev/null
+++ b/configure/os/CONFIG.Common.RHEL8-x86_64
@@ -0,0 +1 @@
+include $(CONFIG)/os/CONFIG.Common.linux-x86_64
diff --git a/configure/os/CONFIG.Common.RHEL8-x86_64-clang b/configure/os/CONFIG.Common.RHEL8-x86_64-clang
new file mode 100644
index 000000000..fa50b4f9c
--- /dev/null
+++ b/configure/os/CONFIG.Common.RHEL8-x86_64-clang
@@ -0,0 +1 @@
+include $(CONFIG)/os/CONFIG.Common.linux-clang
diff --git a/configure/os/CONFIG.Cross_64.RHEL7-x86_64 b/configure/os/CONFIG.Cross_64.RHEL7-x86_64
new file mode 100644
index 000000000..75e4038d1
--- /dev/null
+++ b/configure/os/CONFIG.Cross_64.RHEL7-x86_64
@@ -0,0 +1,21 @@
+# "cross compile" for RHEL7-x86_64 on other 64 bit Linux version
+# Expects RHEL7 RPMs c++ and readline-devel installed in $(SYSROOT)
+# This can be installed on RHEL7 with:
+#    yum install --installroot=$(SYSROOT) <packages>
+# (Assuming $(SYSROOT) is on a shared network volume.)
+# Optionally use a newer toolset (installed on $(SYSROOT)).
+
+include $(CONFIG)/os/CONFIG.linux-x86.linux-x86
+
+SYSROOT          = /opt/RHEL7
+TOOLSET_LOCATION = /opt/rh
+
+# Do NOT set GNU_BIN (or else ...)!
+TOOLSET_DIR      = $(TOOLSET:%=$(TOOLSET_LOCATION)/%/root)
+CC  = $(SYSROOT)$(TOOLSET_DIR)/bin/gcc
+CCC = $(SYSROOT)$(TOOLSET_DIR)/bin/g++
+# Set LD_LIBRARY_PATH and BFLAG only with TOOLSET
+LD_LIBRARY_PATH  = $(if $(TOOLSET),$(SYSROOT)$(TOOLSET_DIR)/lib64)
+BFLAG            = $(if $(TOOLSET),-B$(SYSROOT)$(TOOLSET_DIR)/bin)
+TARGET_CPPFLAGS += --sysroot=$(SYSROOT) $(BFLAG)
+TARGET_LDFLAGS  += --sysroot=$(SYSROOT) $(BFLAG)
diff --git a/configure/os/CONFIG.RHEL8-x86_64.Common b/configure/os/CONFIG.RHEL8-x86_64.Common
new file mode 100644
index 000000000..b4ad566cf
--- /dev/null
+++ b/configure/os/CONFIG.RHEL8-x86_64.Common
@@ -0,0 +1 @@
+include $(CONFIG)/os/CONFIG.linux-x86_64.Common
diff --git a/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64 b/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64
new file mode 100644
index 000000000..a7e319f84
--- /dev/null
+++ b/configure/os/CONFIG.RHEL8-x86_64.RHEL7-x86_64
@@ -0,0 +1 @@
+include $(CONFIG)/os/CONFIG.Cross_64.RHEL7-x86_64
diff --git a/configure/os/CONFIG.RHEL8-x86_64.RHEL8-x86_64 b/configure/os/CONFIG.RHEL8-x86_64.RHEL8-x86_64
new file mode 100644
index 000000000..094d74c91
--- /dev/null
+++ b/configure/os/CONFIG.RHEL8-x86_64.RHEL8-x86_64
@@ -0,0 +1 @@
+include $(CONFIG)/os/CONFIG.linux-x86.linux-x86
diff --git a/configure/os/CONFIG.RHEL8-x86_64.nilrt7-armv7a b/configure/os/CONFIG.RHEL8-x86_64.nilrt7-armv7a
new file mode 100644
index 000000000..451238772
--- /dev/null
+++ b/configure/os/CONFIG.RHEL8-x86_64.nilrt7-armv7a
@@ -0,0 +1 @@
+GNU_BIN=/opt/RHEL7/bin
diff --git a/configure/os/CONFIG_SITE.RHEL8-x86_64.Common b/configure/os/CONFIG_SITE.RHEL8-x86_64.Common
new file mode 100644
index 000000000..96147c3cf
--- /dev/null
+++ b/configure/os/CONFIG_SITE.RHEL8-x86_64.Common
@@ -0,0 +1,15 @@
+include $(CONFIG)/os/CONFIG_SITE.linux-x86_64.Common
+
+# Improved error checking with clang
+# Does not compile with clang 13!
+#CROSS_COMPILER_TARGET_ARCHS += RHEL8-x86_64-clang
+
+# Build for old RHEL7 64 bit
+CROSS_COMPILER_TARGET_ARCHS += RHEL7-x86_64
+
+# Zynq
+CROSS_COMPILER_TARGET_ARCHS += yocto21-aarch64
+
+# NI Linux Real-Time 7.x
+# requires RPM gcc-c++-arm-linux-gnu
+CROSS_COMPILER_TARGET_ARCHS += nilrt7-armv7a