[SOLVED] Cannot build LibreCAD 2.2.0rc1 on slackware-currrent

Dan Suson · 04-28-2019, 09:03 PM

I am trying to build LibreCAD-2.2.0rc1 on slackware-current, without success. I downloaded and installed qt5-5.12.1 and qt5-webkit-5.212.0_alpha 2 from AlienBOB's website, and built libxkbcommon-0.8.4, OpenAL-1.18.0, and muParser-2.2.5 from slackbuilds.org. When I tried to build LibreCAD, however, when I tried to build LibreCAD itself, it failed with compilation errors. The first error was

ui/forms/qg_commandwidget.cpp: In constructor 'QG_CommandWidget::QG_CommandWidget(QWidget*, const char*, Qt::WindowFlags)':
ui/forms/qg_commandwidget.cpp:59:60: error: invalid use of incomplete type 'class QAction'
auto a1 = new QAction(QObject::tr("Keycode Mode"), this);

In file included from /usr/include/qt5/QtWidgets/QApplication:1,
from ../../generated/librecad/ui/ui_qg_commandwidget.h:14,
from ui/forms/qg_commandwidget.h:29,
from ui/forms/qg_commandwidget.cpp:26:
/usr/include/qt5/QtWidgets/qapplication.h:225:18: note: forward declaration of 'class QAction'
friend class QAction;

If anyone knows what I need to do to correct this, please let me know.

bassmadrigal · 04-28-2019, 11:06 PM

Programs on SBo are only tested against qt5 on SBo (5.9.7), not Alien Bob's (5.12.1). It could be that the LibreCAD version on SBo won't work with that new of QT5. You could check and see if there is a newer version of LibreCAD and see if that compiles or try building qt5 from SBo and see if that solves the problem.

Candelabrus · 05-01-2019, 02:45 AM

Can you try this patch, was made for LibreCAD 2.1.3, you will need to regress your version or create a new patch based on this one for 2.2.0
Add this line before qmake-qt5 inside .SlackBuild

Code:

patch -p1 < $CWD/0001-fix-build-with-Qt-5.11.patch

0001-fix-build-with-Qt-5.11.patch

Code:

[hide]From 5bd5d5b1ea6781fcbc3c9c61b2059703647dc5d2 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Mon, 11 Jun 2018 10:44:00 +0200
Subject: [PATCH 1/1] fix build with Qt 5.11

The new Qt removed some implicit inclusions of headers. To avoid build
errors, add explicit includes of those we use in the sources.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>

(cherry picked from commit 6c392e903e162b9283e88f53006e929663f2e883)
Signed-off-by: Christian Hesse <mail@eworm.de>
---
 librecad/src/ui/forms/qg_commandwidget.cpp | 2 ++
 librecad/src/ui/generic/widgetcreator.cpp  | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/librecad/src/ui/forms/qg_commandwidget.cpp b/librecad/src/ui/forms/qg_commandwidget.cpp
index 7cd69398..2b90d671 100644
--- a/librecad/src/ui/forms/qg_commandwidget.cpp
+++ b/librecad/src/ui/forms/qg_commandwidget.cpp
@@ -24,6 +24,8 @@
 **
 **********************************************************************/
 #include "qg_commandwidget.h"
+
+#include <QAction>
 #include <QKeyEvent>
 #include <algorithm>
 
diff --git a/librecad/src/ui/generic/widgetcreator.cpp b/librecad/src/ui/generic/widgetcreator.cpp
index ca89ab13..260d9afd 100644
--- a/librecad/src/ui/generic/widgetcreator.cpp
+++ b/librecad/src/ui/generic/widgetcreator.cpp
@@ -27,6 +27,8 @@
 #include "widgetcreator.h"
 #include "ui_widgetcreator.h"
 
+#include <QAction>
+#include <QActionGroup>
 #include <QSettings>
 #include <QLineEdit>
 #include <QPushButton>[/hide]

Source:
https://www.archlinux.org/packages/c...6_64/librecad/

EDIT:
Slackware package /tmp/librecad-2.2.0rc1-x86_64-1_SBo.tgz created.
Ps, im using qt5 5.12.3

As I am newbie then I do not know how to create patches that make several changes in different files, but it worked well if you want to use them.

Need to added this lines before "qmake-qt5" inside .SlackBuild and save the patches at same place.

Code:

patch -p0 librecad/src/ui/generic/colorwizard.cpp < $CWD/colorwizard.patch
patch -p0 librecad/src/ui/generic/widgetcreator.cpp < $CWD/widgetcreator.patch
patch -p0 librecad/src/ui/forms/qg_commandwidget.cpp < $CWD/qg_commandwidget.patch

Rename attachments to .patch

Dan Suson · 05-07-2019, 09:44 PM

I ended up only using the three patches at the end of Candelabrus' post. Thank you for the help. This worked successfully.