diff --git a/lang/gcc10/Portfile b/lang/gcc10/Portfile
index 773a914a502eb..7b2c662e1b710 100644
--- a/lang/gcc10/Portfile
+++ b/lang/gcc10/Portfile
@@ -95,8 +95,18 @@ license_noconflict  gmp mpfr ppl libmpc zlib
 
 set major           [lindex [split ${version} .-] 0]
 
+proc gcc_arch {arch} {
+    switch ${arch} {
+        arm64       {return aarch64}
+        ppc64       {return powerpc64}
+        ppc         {return powerpc}
+        default     {return ${arch}}
+    }
+}
+
 platform darwin {
-    configure.pre_args-append --build=${build_arch}-apple-darwin${os.major}
+    set gcc_triple [gcc_arch ${build_arch}]-apple-darwin${os.major}
+    configure.pre_args-append --build=${gcc_triple}
 }
 
 set gcc_configure_langs {c c++ objc obj-c++ lto fortran}