From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 30 Nov 2020 16:22:35 +0000 (+0100)
Subject: dlfcn-util: add DLSYM_ARG() helper
X-Git-Tag: v248-rc1~580^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2f03674bc50263833ebc5b79a194cb667c0a244;p=thirdparty%2Fsystemd.git

dlfcn-util: add DLSYM_ARG() helper
---

diff --git a/src/basic/dlfcn-util.h b/src/basic/dlfcn-util.h
index 2c94ed51f34..e0944f3aaf4 100644
--- a/src/basic/dlfcn-util.h
+++ b/src/basic/dlfcn-util.h
@@ -8,3 +8,9 @@
 DEFINE_TRIVIAL_CLEANUP_FUNC(void*, dlclose);
 
 int dlsym_many_and_warn(void *dl, int level, ...);
+
+/* Macro useful for putting together variable/symbol name pairs when calling dlsym_many_and_warn(). Assumes
+ * that each library symbol to resolve will be placed in a variable with the "sym_" prefix, i.e. a symbol
+ * "foobar" is loaded into a variable "sym_foobar". */
+#define DLSYM_ARG(arg) \
+        &sym_##arg, STRINGIFY(arg)