M1 Macでビルドだけ通るようにする（但し動かない）

configure.ac

@@ -29,14 +29,22 @@ AC_CHECK_HEADER([windows.h], [using_winapi=yes], [using_winapi=no])
 AM_CONDITIONAL(WITH_WINAPI, test x$using_winapi != xno)
 
 # Check for OSX
-AC_MSG_CHECKING([for OSX])
-AS_IF([test "x$host_vendor" = xapple], [
+AC_MSG_CHECKING([for Mac])
+AS_IF([test "x$build_vendor" = xapple], [
 	AC_MSG_RESULT([yes])
-	AC_MSG_NOTICE([It seems we are using Mac OS X.])
-	AC_MSG_NOTICE([Please make sure openal-soft is installed with Homebrew.])
-	AC_MSG_NOTICE([The framework shipped with Macintosh will not be used.])
-	CPPFLAGS="$CPPFLAGS -I/usr/local/opt/openal-soft/include"
-	LDFLAGS="$LDFLAGS -L/usr/local/opt/openal-soft/lib"
+	AS_IF([test "x$build_cpu" = xaarch64], [
+		AC_MSG_NOTICE([It seems we are using Apple silicon Mac.])
+		AC_MSG_NOTICE([Please make sure openal-soft and mesa are installed with Homebrew.])
+		AC_MSG_NOTICE([The framework shipped with Mac will not be used.])
+		CPPFLAGS="$CPPFLAGS -I/opt/homebrew/include -I/opt/homebrew/opt/openal-soft/include"
+		LDFLAGS="$LDFLAGS -L/opt/homebrew/lib -L/opt/homebrew/opt/openal-soft/lib"
+	], [
+		AC_MSG_NOTICE([It seems we are using Intel Mac.])
+		AC_MSG_NOTICE([Please make sure openal-soft and mesa are installed with Homebrew.])
+		AC_MSG_NOTICE([The framework shipped with Mac will not be used.])
+		CPPFLAGS="$CPPFLAGS -I/usr/local/opt/openal-soft/include"
+		LDFLAGS="$LDFLAGS -L/usr/local/opt/openal-soft/lib"
+	])
 ], [AC_MSG_RESULT([no])])
 
 # Resource editor