Ticket #22359: g95-error-no-gcc42.diff

Portfile

@@ -21 +21 @@
 
 if {(${os.platform} == "darwin" && ${os.major} == 10)||${build_arch}=="ppc64"||${build_arch}=="x86_64"} {
     default_variants +gcc42
+    pre-fetch {
+        if {![variant_isset gcc42]} {
+            error "$name must be built with +gcc42 on ${os.platform} ${os.major} / ${build_arch}."
+        }
+    }
 }
 
 if {[variant_isset gcc42]} {