Two issues in one patch:

We use shared libpci so we don't need to check for libraries it might be linking to, such as zlib.
Change mkdir_p with MKDIR_P for compability with recent autotools.

--- configure.ac
+++ configure.ac
@@ -14,6 +14,7 @@
 AC_PROG_INTLTOOL
 AC_GNU_SOURCE
 AC_HEADER_STDC
+AC_PROG_MKDIR_P
 
 AC_CHECK_FUNCS([vasprintf])
 
@@ -33,14 +34,6 @@
   echo "> Not using debug"
 fi
 
-# PCI library needs libz.
-
-AC_CHECK_HEADER([zlib.h],
-AC_CHECK_LIB(z,inflate,
-LIBS="$LIBS -lz"
-)
-)
-
 AC_CHECK_HEADER([pci/pci.h],
 AC_CHECK_LIB(pci,pci_alloc, 
 AC_DEFINE(HAVE_PCIUTILS,[1],[Use pci utils to discover devices])
--- po/Makefile.in.in
+++ po/Makefile.in.in
@@ -37,9 +37,9 @@
 itlocaledir = $(prefix)/$(DATADIRNAME)/locale
 subdir = po
 install_sh = @install_sh@
-# Automake >= 1.8 provides @mkdir_p@.
+# Automake >= 1.8 provides @MKDIR_P@.
 # Until it can be supposed, use the safe fallback:
-mkdir_p = $(install_sh) -d
+MKDIR_P = $(install_sh) -d
 
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
@@ -98,7 +98,7 @@
 install-data: install-data-@USE_NLS@
 install-data-no: all
 install-data-yes: all
-	$(mkdir_p) $(DESTDIR)$(itlocaledir)
+	$(MKDIR_P) $(DESTDIR)$(itlocaledir)
 	if test -n "$(PO_LINGUAS)"; then \
 	  linguas="$(PO_LINGUAS)"; \
 	else \
@@ -106,7 +106,7 @@
 	fi; \
 	for lang in $$linguas; do \
 	  dir=$(DESTDIR)$(itlocaledir)/$$lang/LC_MESSAGES; \
-	  $(mkdir_p) $$dir; \
+	  $(MKDIR_P) $$dir; \
 	  if test -r $$lang.gmo; then \
 	    $(INSTALL_DATA) $$lang.gmo $$dir/$(GETTEXT_PACKAGE).mo; \
 	    echo "installing $$lang.gmo as $$dir/$(GETTEXT_PACKAGE).mo"; \