--- rl/build.sh.orig	2022-06-14 08:42:13.000000000 +1000
+++ rl/build.sh	2022-10-13 08:37:51.000000000 +1100
@@ -14,34 +14,6 @@
 	echo "Using compiler $osx_compiler on OS X"
 	# Parse output of cc -v to guess real compiler (works with clang and gcc, at least)
 	echo "Guessing actual compiler:" `$osx_compiler -v 2>&1 | grep ' version '`
-	detected_arches="Compiler supports architectures:"
-	echo $'#include <stdio.h>\nint main() {\n  printf("Hello world\\n");\n}' > test.c
-	# Find out which architectures are supported by doing a test compile AND link per arch
-  arch_flags=''
-	for arch in i386 x86_64 arm64; do
-		arch_flag=' -arch '$arch
-		if ${CC-cc} $arch_flag test.c 2> /dev/null; then
-			arch_flags+=$arch_flag
-			detected_arches+=' '$arch
-		fi
-	done
-	echo $detected_arches
-  # Verify the final arch flags (typically containing multiple architectures).
-  # If it doesn't work, we probably have GNU gcc which cannot handle
-  # i386 + x86_64 (in that order) - go for x86_64 only instead.
-	if ! ${CC-cc} $arch_flags test.c 2> /dev/null; then
-    if test "$arch_flags" == ' -arch i386 -arch x86_64'; then
-      echo "Compiler (gcc?) fails with both i386 and x86_64 arches - do x86_64 only"
-      arch_flags=' -arch x86_64'
-    else
-      echo "Compiler fails with multiple arches - go back to default architecture"
-      arch_flags=''
-    fi
-	fi
-	rm -f test.c test.o a.out
-	# Don't set sysroot anymore (should be fine for OS X 10.6+)
-  CFLAGS+=$arch_flags
-	export CFLAGS
 fi
 
 rm -rf readline-lib
@@ -51,6 +23,8 @@
 patch -p0 < ../readline81-001
 patch -p0 < ../readline81-002
 # Force compiler to CC/cc in the case of Darwin
-./configure CPPFLAGS='-DNEED_EXTERN_PC -fPIC' $cc_override
+export CFLAGS="$CFLAGS __OPTFLAGS__ -fPIC"
+export CPPFLAGS="$CPPFLAGS -DNEED_EXTERN_PC"
+./configure $cc_override
 # Only the static libraries are required
 make static