net/mpich: Remove the compiler version check

It fails on science/meep for no obvious reason, and would otherwise prevent meep from being upgraded mpich2->mpich.

net/mpich/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=	mpich
 PORTVERSION=	3.2.1
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	net parallel
 MASTER_SITES=	http://www.mpich.org/static/downloads/${DISTVERSION}/
 

net/mpich/files/patch-src_binding_cxx_mpicxx.h.in

@@ -0,0 +1,18 @@
+--- src/binding/cxx/mpicxx.h.in.orig	2018-12-17 19:36:19 UTC
++++ src/binding/cxx/mpicxx.h.in
+@@ -16,6 +16,7 @@
+ // GCC (specifically) g++ changed the calling convention
+ // between 3.2.3 and 3.4.3 (!!)  Normally such changes
+ // should only occur at major releases (e.g., version 3 to 4)
++#if 0 // FreeBSD: remove this version check that fails for no apparent reason
+ #ifdef __GNUC__ 
+ # if __GNUC__ >= @GNUCXX_VERSION@ 
+ #  if __GNUC_MINOR__ > 2 && @GNUCXX_MINORVERSION@ == 2 
+@@ -23,6 +24,7 @@
+ #  endif
+ # endif     
+ #endif
++#endif
+ 
+ /* 
+  * Because the API is defined, some methods have parameters that are