Without these changes, neither wesnothd nor campaignd nor the tools link...

...when zipios is available (Debian sid). I've no idea how correct my
fix is, so please review.

configure.ac

@@ -495,7 +495,7 @@ AC_SUBST([FREETYPE_LIBS])
 AC_LANG(C++)
 AC_MSG_CHECKING([for libzipios++])
 OLD_LIBS="$LIBS"
-LIBS="$LIBS -lzipios"
+LIBS="-lzipios -lz"
 LIBZIPIOS=
 AC_LINK_IFELSE([AC_LANG_SOURCE([
 #include <zipios++/dircoll.h>
@@ -505,7 +505,7 @@ int main(int argc, char **argv)
 }
 	])],
 	[AC_MSG_RESULT(yes)
-	LIBZIPIOS=-lzipios
+	LIBZIPIOS="-lzipios -lz"
 	AC_DEFINE([USE_ZIPIOS],[1],[Make use of the zipios++ library to read data in zip files])],
 	[AC_MSG_RESULT(no)
 	AC_MSG_WARN([*** libzipios++ not found - support for ZIP files is disabled])])

src/campaign_server/Makefile.am

@@ -29,4 +29,4 @@ campaignd_SOURCES = campaign_server.cpp \
 		   ../zipios++/xcoll.hpp
 
 AM_CXXFLAGS = @SDL_CFLAGS@ -DLOCALEDIR=\"$(LOCALEDIR)\" -I$(srcdir)/..
-AM_LDFLAGS = @SDL_LIBS@ @SDL_NET_LIBS@ $(LIBZIPIOS)
+LDADD = @SDL_NET_LIBS@ @SDL_LIBS@ $(LIBZIPIOS)

src/server/Makefile.am

@@ -35,4 +35,4 @@ wesnothd_SOURCES = game.cpp \
 		   ../zipios++/xcoll.hpp
 
 AM_CXXFLAGS = @SDL_CFLAGS@ -DLOCALEDIR=\"$(LOCALEDIR)\" -I$(srcdir)/..
-AM_LDFLAGS = @SDL_LIBS@ @SDL_NET_LIBS@ $(LIBZIPIOS)
+LDADD = @SDL_NET_LIBS@ @SDL_LIBS@ $(LIBZIPIOS)

src/tools/Makefile.am

@@ -8,8 +8,6 @@ bin_PROGRAMS = exploder cutter
 
 AM_CXXFLAGS = @SDL_CFLAGS@ @PNG_CFLAGS@ -DWESNOTH_PATH=\"$(pkgdatadir)\" -I../ \
 	      -DLOCALEDIR=\"$(LOCALEDIR)\" -I$(srcdir)/..
-AM_LDFLAGS = @SDL_LIBS@
-
 
 exploder_SOURCES = exploder.cpp \
 		   exploder_utils.cpp \
@@ -47,7 +45,7 @@ cutter_SOURCES = cutter.cpp \
 		   ../gettext.cpp
 
 
-exploder_LDFLAGS = @SDL_LIBS@ @SDL_IMAGE_LIBS@ @PNG_LIBS@ $(LIBZIPIOS)
-cutter_LDFLAGS = @SDL_LIBS@ @SDL_IMAGE_LIBS@ @PNG_LIBS@ $(LIBZIPIOS)
+exploder_LDADD = @SDL_IMAGE_LIBS@ @PNG_LIBS@ @SDL_LIBS@ $(LIBZIPIOS)
+cutter_LDADD = @SDL_IMAGE_LIBS@ @PNG_LIBS@ @SDL_LIBS@ $(LIBZIPIOS)
 
 endif