libmakepkg: use readelf instead of file for finding ELF file types

Signed-off-by: Ethan Sommer <e5ten.arch@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

scripts/libmakepkg/tidy/strip.sh.in

@@ -111,22 +111,20 @@ tidy_strip() {
 
 		local binary strip_flags
 		find . -type f -perm -u+w -print0 2>/dev/null | while IFS= read -rd '' binary ; do
-			case "$(file -bi "$binary")" in
-				*application/x-sharedlib*)  # Libraries (.so)
+			case "$(LC_ALL=C readelf -h "$binary" 2>/dev/null)" in
+				*Type:*'DYN (Shared object file)'*) # Libraries (.so) or Relocatable binaries
 					strip_flags="$STRIP_SHARED";;
-				*application/x-archive*)    # Libraries (.a)
-					strip_flags="$STRIP_STATIC";;
-				*application/x-object*)
-					case "$binary" in
-						*.ko)                   # Kernel module
-							strip_flags="$STRIP_SHARED";;
-						*)
-							continue;;
-					esac;;
-				*application/x-executable*) # Binaries
+				*Type:*'EXEC (Executable file)'*) # Binaries
 					strip_flags="$STRIP_BINARIES";;
-				*application/x-pie-executable*)  # Relocatable binaries
-					strip_flags="$STRIP_SHARED";;
+				*Type:*'REL (Relocatable file)'*) # Libraries (.a) or objects
+					if ar t "$binary" &>/dev/null; then # Libraries (.a)
+						strip_flags="$STRIP_STATIC"
+					elif [[ $binary = *'.ko' ]]; then # Kernel module
+						strip_flags="$STRIP_SHARED"
+					else
+						continue
+					fi
+					;;
 				*)
 					continue ;;
 			esac