--- Python-3.9.4/config.sub	2021-02-21 20:22:43.901024503 +0100
+++ Python-3.9.4/config.sub	2021-02-21 20:24:35.079400552 +0100
@@ -1485,6 +1485,8 @@
 	-oss*)
 		os=-sysv3
 		;;
+	-serenity*)
+		;;
 	-svr4*)
 		os=-sysv4
 		;;
--- Python-3.9.4/configure.ac	2021-04-06 20:59:45.319060429 +0200
+++ Python-3.9.4/configure.ac	2021-04-06 21:02:33.875267539 +0200
@@ -389,6 +389,9 @@
        # a lot of different things including 'define_xopen_source'
        # in the case statement below.
 	case "$host" in
+	*-*-serenity*)
+		ac_sys_system=SerenityOS
+		;;
 	*-*-linux-android*)
 		ac_sys_system=Linux-android
 		;;
@@ -435,6 +438,9 @@
 AC_SUBST(_PYTHON_HOST_PLATFORM)
 if test "$cross_compiling" = yes; then
 	case "$host" in
+	*-*-serenity*)
+		_host_cpu=$host_cpu
+		;;
 	*-*-linux*)
 		case "$host_cpu" in
 		arm*)
--- Python-3.9.4/configure	2021-02-21 20:22:43.898024520 +0100
+++ Python-3.9.4/configure	2021-02-21 20:24:35.096400457 +0100
@@ -3292,6 +3292,9 @@
        # a lot of different things including 'define_xopen_source'
        # in the case statement below.
 	case "$host" in
+	*-*-serenity*)
+		ac_sys_system=SerenityOS
+		;;
 	*-*-linux-android*)
 		ac_sys_system=Linux-android
 		;;
@@ -3339,6 +3342,9 @@
 
 if test "$cross_compiling" = yes; then
 	case "$host" in
+	*-*-serenity*)
+		_host_cpu=$host_cpu
+		;;
 	*-*-linux*)
 		case "$host_cpu" in
 		arm*)
diff -Naur Python-3.9.4/configure Python-3.9.4.serenity/configure
--- Python-3.9.4/configure	2021-04-24 14:50:59.083484421 +0200
+++ Python-3.9.4.serenity/configure	2021-04-24 15:50:26.821359967 +0200
@@ -9647,6 +9647,7 @@
 #	    LINKFORSHARED="-Wl,-E -Wl,+s -Wl,+b\$(BINLIBDEST)/lib-dynload";;
 	Linux-android*) LINKFORSHARED="-pie -Xlinker -export-dynamic";;
 	Linux*|GNU*) LINKFORSHARED="-Xlinker -export-dynamic";;
+	SerenityOS*) LINKFORSHARED="-Xlinker -export-dynamic";;
 	# -u libsys_s pulls in all symbols in libsys
 	Darwin/*)
 		LINKFORSHARED="$extra_undefs -framework CoreFoundation"