Use devtoolset-8 on RHEL/CentOS 7

make-linux.mk

@@ -1,12 +1,12 @@
 # Automagically pick clang or gcc, with preference for clang
 # This is only done if we have not overridden these with an environment or CLI variable
 ifeq ($(origin CC),default)
-	CC:=$(shell if [ -e /usr/bin/clang ]; then echo clang; else echo gcc; fi)
-	CC:=$(shell if [ -e /opt/intel/bin/icc ]; then echo /opt/intel/bin/icc -ipo -ansi-alias; else echo $(CC); fi)
+        CC:=$(shell if [ -e /usr/bin/clang ]; then echo clang; else echo gcc; fi)
+        CC:=$(shell if [ -e /opt/rh/devtoolset-8/root/usr/bin/gcc ]; then echo /opt/rh/devtoolset-8/root/usr/bin/gcc; else echo $(CC); fi)
 endif
 ifeq ($(origin CXX),default)
-	CXX:=$(shell if [ -e /usr/bin/clang++ ]; then echo clang++; else echo g++; fi)
-	CXX:=$(shell if [ -e /opt/intel/bin/icc ]; then echo /opt/intel/bin/icc -ipo -ansi-alias; else echo $(CXX); fi)
+        CXX:=$(shell if [ -e /usr/bin/clang++ ]; then echo clang++; else echo g++; fi)
+        CXX:=$(shell if [ -e /opt/rh/devtoolset-8/root/usr/bin/g++ ]; then echo /opt/rh/devtoolset-8/root/usr/bin/g++; else echo $(CXX); fi)
 endif
 
 INCLUDES?=