* Check for pkg-config before bootstrapping, because autoconf gives a

totally meaningless message when it's not present.

bootstrap

@@ -30,6 +30,7 @@ fi
 # Check for needed features
 auxdir="`sed -ne 's/^[ \t]*A._CONFIG_AUX_DIR *([[ ]*\([^] )]*\).*/\1/p' $conffile`"
 libtool="`grep -q '^[ \t]*A._PROG_LIBTOOL' $conffile && echo yes || echo no`"
+pkgconfig="`grep -q '^[ \t]*PKG_PROG_PKG_CONFIG' $conffile && echo yes || echo no`"
 header="`grep -q '^[ \t]*A._CONFIG_HEADER' $conffile && echo yes || echo no`"
 aclocalflags="`sed -ne 's/^[ \t]*ACLOCAL_AMFLAGS[ \t]*=//p' Makefile.am`"
 
@@ -93,6 +94,14 @@ if test "$libtool" = "yes"; then
   fi
 fi
 
+# Check for pkg-config
+if test "$pkgconfig" = "yes"; then
+  if ! pkg-config --version >/dev/null 2>&1; then
+    echo "$0: you need pkg-config"
+    exit 1
+  fi
+fi
+
 # Remove old cruft
 for x in aclocal.m4 configure config.guess config.log config.sub config.cache config.h.in config.h compile libtool.m4 ltoptions.m4 ltsugar.m4 ltversion.m4 ltmain.sh libtool ltconfig missing mkinstalldirs depcomp install-sh; do rm -f $x autotools/$x; if test -n "$auxdir"; then rm -f "$auxdir/$x"; fi; done
 rm -Rf autom4te.cache