pdfpc: update to 4.6.0, fix build on powerpc

graphics/pdfpc/Portfile

@@ -5,7 +5,7 @@ PortGroup               github 1.0
 PortGroup               active_variants 1.1
 PortGroup               cmake 1.1
 
-github.setup            pdfpc pdfpc 4.5.0 v
+github.setup            pdfpc pdfpc 4.6.0 v
 
 maintainers             {gmx.de:Torsten.Maehne @maehne} openmaintainer
 
@@ -21,29 +21,37 @@ long_description    ${description}\
     the presentation. The input files processed by pdfpc are PDF documents, \
     which can be created using nearly any of today's presentation software.
 
-platforms               darwin
 license                 GPL-2+
 
 homepage                https://${github.author}.github.io/
 
+checksums               rmd160  2aa443ba7f47fbc4aaf9e23ce81534d72026affc \
+                        sha256  3b1a393f36a1b0ddc29a3d5111d8707f25fb2dd2d93b0401ff1c66fa95f50294 \
+                        size    7766521
+github.tarball_from     archive
+
 depends_build-append    path:bin/vala:vala \
-                        port:pkgconfig
+                        path:bin/pkg-config:pkgconfig
 depends_lib-append      path:lib/pkgconfig/gtk+-3.0.pc:gtk3 \
                         path:lib/pkgconfig/poppler.pc:poppler \
                         port:libgee \
                         path:lib/pkgconfig/librsvg-2.0.pc:librsvg \
                         port:discount \
-                        path:lib/pkgconfig/webkit2gtk-4.0.pc:webkit2-gtk
-
-cmake.out_of_source     yes
+                        port:qrencode
 
-checksums               rmd160  2c55ae8fad8e1ec208ae2e25d0187dbc3e7d1739 \
-                        sha256  034aa0ffbaeacb87611792c4d02ad8cb8927b9edfcf5f2c542ac94dbddf8ce10 \
-                        size    7754721
+# https://github.com/pdfpc/pdfpc/pull/687
+patchfiles-append       18beaecbbcc066e0d4c889b3aa3ecaa7351f7768.patch
 
 configure.args          -DCMAKE_INSTALL_SYSCONFDIR=${prefix}/etc \
+                        -DMDVIEW=off \
                         -DMOVIES=off
 
+if {${configure.build_arch} ni [list ppc ppc64]} {
+    depends_lib-append          path:lib/pkgconfig/webkit2gtk-4.0.pc:webkit2-gtk
+
+    configure.args-delete       -DMDVIEW=off
+}
+
 pre-configure {
     if {![variant_isset quartz] && ![variant_isset x11]} {
         error "Either +x11 or +quartz is required"

graphics/pdfpc/files/18beaecbbcc066e0d4c889b3aa3ecaa7351f7768.patch

@@ -0,0 +1,33 @@
+From 18beaecbbcc066e0d4c889b3aa3ecaa7351f7768 Mon Sep 17 00:00:00 2001
+From: Evgeny Stambulchik <[email protected]>
+Date: Tue, 25 Apr 2023 16:11:25 +0300
+Subject: [PATCH] Create Lists of nullable types
+
+---
+ src/classes/drawings/drawing_commands.vala | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/classes/drawings/drawing_commands.vala b/src/classes/drawings/drawing_commands.vala
+index 77e56e6d..c305a8c5 100644
+--- src/classes/drawings/drawing_commands.vala
++++ src/classes/drawings/drawing_commands.vala
+@@ -54,8 +54,8 @@ namespace pdfpc {
+         }
+
+         public void clear() {
+-            this.drawing_commands = new List<DrawingCommand>();
+-            this.redo_commands = new List<DrawingCommand>();
++            this.drawing_commands = new List<DrawingCommand?>();
++            this.redo_commands = new List<DrawingCommand?>();
+         }
+
+         public void add_line(bool is_eraser,
+@@ -70,7 +70,7 @@ namespace pdfpc {
+
+             // After adding a new line you can no longer redo the old
+             // path.
+-            this.redo_commands = new List<DrawingCommand>(); // clear
++            this.redo_commands = new List<DrawingCommand?>(); // clear
+
+             bool new_path = true;
+             double epsilon = 1e-4; // Less than 0.1 pixel for a 1000x1000 img