On macOS, also compile Objective-C .m files. There's only one, in the bundled
copy of physfs, and without it, love will fail to launch:

dyld[12345]: symbol not found in flat namespace (___PHYSFS_platformCalcBaseDir)

https://github.com/love2d/love/issues/2063
--- platform/unix/configure.ac.orig	2023-12-03 06:44:36.000000000 -0600
+++ platform/unix/configure.ac	2024-05-07 23:13:50.000000000 -0500
@@ -12,6 +12,7 @@
 AC_PROG_CXX
 AC_PROG_SED
 AC_PROG_MKDIR_P
+AC_PROG_OBJC
 AC_PROG_OBJCXX
 PKG_PROG_PKG_CONFIG
 AC_C_BIGENDIAN
--- platform/unix/genmodules.orig	2023-12-03 06:44:36.000000000 -0600
+++ platform/unix/genmodules	2024-05-06 23:30:34.000000000 -0500
@@ -9,9 +9,12 @@
 	echo "$@" | tr '[:lower:]' '[:upper:]'
 }
 
+os_name=$(uname -s)
 sourcefind()
 {
-	find "$1" $2 -type f \( -iname "*.c" -o -iname "*.cpp" -o -iname "*.h" -o -iname "*.hpp" -o -iname "*.lch" -o -iname "*.lua" \) | awk "{print \"./$prefix\"\$0\" \\\\\"}" | grep -v -f"$LOVEROOT/platform/unix/exclude" | sort
+	types=(-iname "*.c" -o -iname "*.cpp" -o -iname "*.h" -o -iname "*.hpp" -o -iname "*.lch" -o -iname "*.lua")
+	[ "$os_name" = "Darwin" ] && types+=(-o -iname "*.m")
+	find "$1" $2 -type f \( "${types[@]}" \) | awk "{print \"./$prefix\"\$0\" \\\\\"}" | grep -v -f"$LOVEROOT/platform/unix/exclude" | sort
 }
 
 handlemodule()