gnu: Add tinyxml.

* gnu/packages/xml.scm (tinyxml): New variable.
* gnu/packages/patches/tinyxml-use-stl.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

gnu-system.am

@@ -698,6 +698,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/texi2html-document-encoding.patch	\
   gnu/packages/patches/texi2html-i18n.patch			\
   gnu/packages/patches/tidy-CVE-2015-5522+5523.patch		\
+  gnu/packages/patches/tinyxml-use-stl.patch			\
   gnu/packages/patches/torsocks-dns-test.patch			\
   gnu/packages/patches/tvtime-gcc41.patch			\
   gnu/packages/patches/tvtime-pngoutput.patch			\

gnu/packages/patches/tinyxml-use-stl.patch

@@ -0,0 +1,41 @@
+From a53b6ee4519a7657164610ac14a82c57b1273bf6 Mon Sep 17 00:00:00 2001
+From: David Thompson <dthompson2@worcester.edu>
+Date: Mon, 23 Nov 2015 06:54:36 -0500
+Subject: [PATCH] Use STL.
+
+Software that uses the shared library, such as Kodi, assume that TinyXML was
+compiled with STL activated.
+
+---
+ tinyxml.h   | 2 ++
+ xmltest.cpp | 1 +
+ 2 files changed, 3 insertions(+)
+
+diff --git a/tinyxml.h b/tinyxml.h
+index a3589e5..6cbfc7d 100644
+--- a/tinyxml.h
++++ b/tinyxml.h
+@@ -43,6 +43,8 @@ distribution.
+ #define DEBUG
+ #endif
+ 
++#define TIXML_USE_STL 1
++
+ #ifdef TIXML_USE_STL
+ 	#include <string>
+  	#include <iostream>
+diff --git a/xmltest.cpp b/xmltest.cpp
+index 663c157..057dbfe 100644
+--- a/xmltest.cpp
++++ b/xmltest.cpp
+@@ -2,6 +2,7 @@
+    Test program for TinyXML.
+ */
+ 
++#define TIXML_USE_STL 1
+ 
+ #ifdef TIXML_USE_STL
+ 	#include <iostream>
+-- 
+2.5.0
+

gnu/packages/xml.scm

@@ -511,3 +511,72 @@ Libxml2).")
 UTF-8 and UTF-16 encoding.")
     ;; LGPL 2.0+ with additional exceptions for static linking
     (license license:lgpl2.0+)))
+
+;; TinyXML is an unmaintained piece of software, so the patches and build
+;; system massaging have no upstream potential.
+(define-public tinyxml
+  (package
+    (name "tinyxml")
+    (version "2.6.2")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://sourceforge/tinyxml/tinyxml_"
+                                  (string-join (string-split version #\.) "_")
+                                  ".tar.gz"))
+              (sha256
+               (base32
+                "14smciid19lvkxqznfig77jxn5s4iq3jpb47vh5a6zcaqp7gvg8m"))
+              (patches (list (search-patch "tinyxml-use-stl.patch")))))
+    (build-system gnu-build-system)
+    ;; This library is missing *a lot* of the steps to make it usable, so we
+    ;; have to add them here, like every other distro must do.
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (add-after 'build 'build-shared-library
+           (lambda _
+             (zero? (system* "g++" "-Wall" "-O2" "-shared" "-fpic"
+                             "tinyxml.cpp" "tinyxmlerror.cpp"
+                             "tinyxmlparser.cpp" "tinystr.cpp"
+                             "-o" "libtinyxml.so"))))
+         (replace 'check
+           (lambda _ (zero? (system "./xmltest"))))
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (include (string-append out "/include"))
+                    (lib (string-append out "/lib"))
+                    (pkgconfig (string-append out "/lib/pkgconfig"))
+                    (doc (string-append out "/share/doc")))
+               ;; Install libs and headers.
+               (install-file "libtinyxml.so" lib)
+               (install-file "tinystr.h" include)
+               (install-file "tinyxml.h" include)
+               ;; Generate and install pkg-config file.
+               (mkdir-p pkgconfig)
+               ;; Software such as Kodi expect this file to be present, but
+               ;; it's not provided in the source code.
+               (call-with-output-file (string-append pkgconfig "/tinyxml.pc")
+                 (lambda (port)
+                   (format port "prefix=~a
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: TinyXML
+Description: A simple, small, C++ XML parser
+Version: ~a
+Libs: -L${libdir} -ltinyxml
+Cflags: -I${includedir}
+"
+                           out ,version)))
+               ;; Install docs.
+               (mkdir-p doc)
+               (copy-recursively "docs" (string-append doc "tinyxml"))
+               #t))))))
+    (synopsis "Small XML parser for C++")
+    (description "TinyXML is a small and simple XML parsing library for the
+C++ programming langauge.")
+    (home-page "http://www.grinninglizard.com/tinyxml/index.html")
+    (license license:zlib)))