Sorting gcc at begining

ci/install_compilers.sh

@@ -13,7 +13,7 @@ system_compiler=$(jq -Mrc '
  | map("\(.compiler)@\(.version) \($arch)")
 ' ${STACK_CONFIG})
 
-_compilers=$(jq -Mrc '.stack
+_compilers=$(jq -Mr '.stack
   | .system_arch as $arch
   | .compilers
   | to_entries
@@ -22,7 +22,10 @@ _compilers=$(jq -Mrc '.stack
   | select((.constraint == null) or (.constraint? | index(env.environment)))
 ' ${STACK_CONFIG})
 
-compilers_names=$(echo ${_compilers} | jq -Mrc '. | "\(.name)"')
+# list compilers and ensure gcc is first
+compilers_names="gcc $(echo ${_compilers} | jq -Mrs '. | map("\(.name)") | .[]' | egrep -v '^gcc$')"
+
+echo ${compilers_names}
 
 echo "List compilers:"
 echo ${_compilers} | jq -C '.'