Minimalistic fix for generic_arch on powerpc

spack_setup.sh

@@ -11,7 +11,12 @@ spack_branch='mpsd/v0.21_24a'
 # system c compiler (autodetected later)
 system_compiler=""
 
-generic_arch="x86_64_v2"
+if [ `archspec cpu` = "power8le" ]; then
+    generic_arch="power8le"
+else
+    generic_arch="x86_64_v2"
+fi
+echo "${C_MSG}#####${C_RESET} Using '$generic_arch' as generic architecture"
 # default: spack cache is in pwd (microarch specific)
 # setup the build cache directory
 # This could be a symlink to  different location ( e.g from a different run of the script)