citadel

commit 2cb53c9535ca35d9e0e879c18f6b69adb531c4af
parent 3a1522c9a4a69083b867f2cf5e599ec8a61e1883
Author: William Casarin <jb55@jb55.com>
Date:   Sat, 19 Sep 2020 05:09:02 -0700

bin/undefined-symbols: init

Diffstat:
A
bin/undefined-symbols
 | 
15
+++++++++++++++

1 file changed, 15 insertions(+), 0 deletions(-)
diff --git a/bin/undefined-symbols b/bin/undefined-symbols
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+usage () {
+    printf "usage: undefined-symbols lib.a\n\n"
+    printf "  print external undefined symbols in an archive\n\n"
+    exit 1
+}
+
+[ -z "$1" ] && usage
+
+exec comm -13 \
+ <(nm "$1" | egrep ' [BDTW] ' | sed -e 's/.* [BDTW] //' | sort -u) \
+ <(nm "$1" | grep ' U ' | sed -e 's/.* U //' | sort -u) \
+    | grep -v '^_' \
+    | less