From: Sami Kerola <kerolasa@iki.fi>
Date: Tue, 23 Aug 2016 19:21:58 +0000 (+0100)
Subject: portability: fix MacOS libresolv usage
X-Git-Tag: v0.88~27^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F144%2Fhead;p=thirdparty%2Fmtr.git

portability: fix MacOS libresolv usage

MacOS has res_query in libc, but needs libresolv for dn_expand().
---

diff --git a/configure.ac b/configure.ac
index 8ce4da8..5f449a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -136,6 +136,10 @@ AC_CHECK_FUNC([res_query], [RESOLV_LIBS=""], [
     ])
   ])
 ])
+dnl MacOS has res_query in libc, but needs libresolv for dn_expand().
+AS_IF([test "x" = "x$RESOLV_LIBS"], [
+  AC_CHECK_LIB([resolv], [dn_expand], [RESOLV_LIBS="-lresolv"])
+])
 AC_SUBST([RESOLV_LIBS])
 
 # Check errno and socket data types.