libgcrypt: Improved cross-compile support

Note: By now the libgcrypt tests will be build again while cross-compiling
      but we have to explicitely disable MPI assembler modules, which leads
      to unresolved symbols otherwise. In general this shouldn't cause any
      troubles as it seems that assembler modules aren't even used while
      compiling natively. At least I couldn't find any related symbols in
      any natively compiled libgcrypt binaries I have access to currently.

security/libgcrypt/disable-tests.patch.cross

@@ -1,29 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-#
-# Filename: package/.../libgcrypt/disable-tests.patch.cross
-# Copyright (C) 2008 The OpenSDE Project
-#
-# More information can be found in the files COPYING and README.
-#
-# This patch file is dual-licensed. It is available under the license the
-# patched project is licensed under, as long as it is an OpenSource license
-# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
-# of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
---- libgcrypt-1.4.0/Makefile.in.orig	2007-12-10 11:05:13.000000000 +0200
-+++ libgcrypt-1.4.0/Makefile.in	2008-03-15 19:27:24.000000000 +0200
-@@ -236,8 +236,8 @@
- DISTCHECK_CONFIGURE_FLAGS = --enable-random-daemon \
-   --enable-ciphers=arcfour:blowfish:cast5:des:aes:twofish:serpent:rfc2268:seed:camellia
- 
--DIST_SUBDIRS = m4 mpi cipher src doc tests
--SUBDIRS = mpi cipher src doc tests
-+DIST_SUBDIRS = m4 mpi cipher src doc
-+SUBDIRS = mpi cipher src doc
- EXTRA_DIST = BUGS autogen.sh README.SVN
- DISTCLEANFILES = 
- all: config.h

security/libgcrypt/libgcrypt-1.4.0-tests-fix.patch.cross

@@ -0,0 +1,31 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../libgcrypt/libgcrypt-1.4.0-tests-fix.patch.cross
+# Copyright (C) 2008 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+Author: Nicolas Thill
+Origin: OpenWRT (https://dev.openwrt.org/browser/packages/libs/libgcrypt/)
+Description: Fix libgcrypt tests to build while cross-compiling.
+
+--- libgcrypt-1.4.0/tests/Makefile.in.orig	2008-03-17 02:40:20.000000000 +0200
++++ libgcrypt-1.4.0/tests/Makefile.in	2008-03-17 02:40:41.000000000 +0200
+@@ -313,7 +313,7 @@
+ # a built header.
+ AM_CPPFLAGS = -I../src -I$(top_srcdir)/src
+ AM_CFLAGS = $(GPG_ERROR_CFLAGS)
+-LDADD = ../src/libgcrypt.la
++LDADD = ../src/libgcrypt.la @LTLIBOBJS@ @GPG_ERROR_LIBS@
+ 
+ # pkbench uses mmap for no good reason.  Needs to be fixed.  Code for
+ # this can be found in libksba/tests. 

security/libgcrypt/libgcrypt.conf

@@ -16,3 +16,8 @@
 # one from the sandbox while cross-compiling
 pkgprefix -t libgpg-error
 var_append confopt ' ' "--with-gpg-error-prefix=$root/$( pkgprefix libgpg-error )"
+
+# explicitely disable MPI assembler modules while cross-compiling
+if atstage cross; then
+	var_append extraconfopt ' ' "--disable-asm"
+fi