slang: clean up options and dependencies

The AC_PATH_XTRA check for X11 headers is never actually used, so patch that out
and remove the options in EXTRA_OECONF.

Move pcre/png/zlib toggles to PACKAGECONFIG, retaining the behaviour that only
PCRE is enabled by default.

Add missing libiconv dependency.

(From OE-Core rev: 3587053646c34002fa18b87834516ce27fbd0788)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/slang/slang/no-x.patch

@@ -0,0 +1,14 @@
+There's no need to check for the X libraries as the socket module doesn't use
+anything from X.
+
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+diff --git a/autoconf/configure.ac b/autoconf/configure.ac
+index b61e974..a3e5db2 100644
+--- a/autoconf/configure.ac
++++ b/autoconf/configure.ac
+@@ -72,3 +71,0 @@ AC_SUBST(LIB_READLINE)
+-# For the socket module
+-AC_PATH_XTRA
+-

meta/recipes-extended/slang/slang_2.3.0.bb

@@ -9,7 +9,7 @@ to recode S-Lang procedures in C if you need to."
 
 HOMEPAGE = "http://www.jedsoft.org/slang/"
 SECTION = "libs"
-DEPENDS = "pcre ncurses"
+DEPENDS = "ncurses virtual/libiconv"
 
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=a52a18a472d4f7e45479b06563717c02"
@@ -20,18 +20,23 @@ SRC_URI = "http://www.jedsoft.org/releases/${BPN}/${BP}.tar.bz2 \
            file://fix-check-pcre.patch \
            file://slang-fix-the-iconv-existence-checking.patch \
            file://0001-Fix-error-conflicting-types-for-posix_close.patch \
+           file://no-x.patch \
           "
+SRC_URI[md5sum] = "3bcc790460d52db1316c20395b7ac2f1"
+SRC_URI[sha256sum] = "f95224060f45e0d8212a5039b339afa5f1a94a1bb0298e796104e5b12e926129"
+
 UPSTREAM_CHECK_URI = "http://www.jedsoft.org/releases/slang/"
 PREMIRRORS_append = "\n http://www.jedsoft.org/releases/slang/.* http://www.jedsoft.org/releases/slang/old/ \n"
 
 inherit autotools-brokensep
-
 CLEANBROKEN = "1"
 
-SRC_URI[md5sum] = "3bcc790460d52db1316c20395b7ac2f1"
-SRC_URI[sha256sum] = "f95224060f45e0d8212a5039b339afa5f1a94a1bb0298e796104e5b12e926129"
+EXTRA_OECONF = "--without-onig"
 
-EXTRA_OECONF += " --without-z --without-png --without-onig --x-includes=${STAGING_DIR_HOST}/usr/include/X11 --x-libraries=${STAGING_DIR_HOST}/usr/lib"
+PACKAGECONFIG ??= "pcre"
+PACKAGECONFIG[pcre] = "--with-pcre,--without-pcre,pcre"
+PACKAGECONFIG[png] = "--with-png,--without-png,libpng"
+PACKAGECONFIG[zlib] = "--with-z,--without-z,zlib"
 
 do_configure_prepend() {
     # slang keeps configure.ac and rest of autoconf files in autoconf/ directory