--- configure.orig	2021-01-24 11:48:40.000000000 +0900
+++ configure	2021-06-24 08:43:23.000000000 +0900
@@ -3907,29 +3907,6 @@
 	esac
 fi
 
-# GNU Compiler for Apple Mac OS X
-if test "$build_vendor" = "apple"; then
-   if test -z "$CC"; then
-      CC="gcc"
-   fi
-   if test -z "$FC"; then
-      FC="gfortran"
-   fi
-   if test "$enable_32bit" = "yes"; then
-      CFLAGS="$CFLAGS -m32"
-      FCFLAGS="$FCFLAGS -m32"
-   else
-      CFLAGS="$CFLAGS -m64"
-      FCFLAGS="$FCFLAGS -m64"
-   fi
-   if test "$enable_omp" = "yes"; then
-      if $CC --version 2>&1 | grep clang > /dev/null ; then
-      	 OMPFLAG="-Xclang -fopenmp"
-       	 LDFLAGS="$LDFLAGS -lomp"
-      fi
-   fi
-fi
-
 enable_dependency_tracking="no"