configure.ac: Don't let the LIBS setting leak out.

Otherwise binaries will be linked against Nettle unnecessarily.

diff --git a/configure.ac b/configure.ac
index b360139..45ddbb6 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -43,12 +43,13 @@ PKG_CHECK_MODULES([nettle], [nettle >= 2.4], [], [
   ## That didn't work; unfortunately older Nettle packages don't have a
   ## pkg-config dropping.  Let's see whether it will work anyway.
   nettlep=t
+  save_LIBS=$LIBS
   AC_CHECK_HEADER([nettle/sha.h], [], [nettlep=nil])
   AC_CHECK_LIB([nettle], [nettle_sha256_init], [], [nettlep=nil])
   case $nettlep in
     nil) AC_MSG_ERROR([Failed to find Nettle library.]) ;;
   esac
-  nettle_CFLAGS= nettle_LIBS=-lnettle])
+  nettle_CFLAGS= nettle_LIBS=-lnettle LIBS=$save_LIBS])
 
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 dnl Perl programming environment.