build: Switch to use libtool for the static libraries

This makes it possible to embed libcompat inside libdpkg, so that the
static library that we ship is self contained with the required
compatibility code, specifically the MD5 functions.

This also prepares the build system for when we start building a
shared library, although it disables it by default.

Closes: #746122

1 files changed, 1 insertions, 0 deletions

diff --git a/README b/README
index 0ed6f7b80..89ce39b70 100644
--- a/README
+++ b/README
@@ -44,6 +44,7 @@ some required software needs to be installed:
 
   GNU autoconf >= 2.60
   GNU automake >= 1.11
+  GNU libtool >= 2.0
   GNU gettext >= 0.18.2 (or just autopoint if using --disable-nls)
   flex