build system: Define HAVE_LIBSTATGRAB if the statgrab library is available.

This define is used in some plugins. Thanks to Oleg King for noticing and
pointing this out and thanks to Sebastian Harl for a first patch which,
unfortunately, doesn't work anymore after changing the configure script.

diff --git a/configure.in b/configure.in
index ae11ecf..ef428cc 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -1193,6 +1193,7 @@ fi
 AM_CONDITIONAL(BUILD_WITH_LIBSTATGRAB, test "x$with_libstatgrab" = "xyes")
 if test "x$with_libstatgrab" = "xyes"
 then
+  AC_DEFINE(HAVE_LIBSTATGRAB, 1, [Define to 1 if you have the 'statgrab' library (-lstatgrab)])
   BUILD_WITH_LIBSTATGRAB_CFLAGS="$with_libstatgrab_cflags"
   BUILD_WITH_LIBSTATGRAB_LDFLAGS="$with_libstatgrab_ldflags"
   AC_SUBST(BUILD_WITH_LIBSTATGRAB_CFLAGS)