From 908604ef56e0933a1f7f24771afcef974e726613 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ondrej=20Mosn=C3=A1=C4=8Dek?= <omosnacek@gmail.com>
Date: Wed, 1 Feb 2023 22:43:50 +0100
Subject: [PATCH 3/3] Allow linking against system libraries via pkg-config
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When 'link_pkgconfig' is added to CONFIG, chessx will now use pkg-config
to dynamically link against the quazip and zlib libraries installed on
the system, rather than bundling quazip or guessing the header file
location. Default behavior remains unchanged.

Signed-off-by: Ondrej Mosnáček <omosnacek@gmail.com>
---
 chessx.pro             | 102 +++++++++++++++++++++--------------------
 src/gui/mainwindow.cpp |  10 +++-
 2 files changed, 61 insertions(+), 51 deletions(-)

diff --git a/chessx.pro b/chessx.pro
index 88def632..9b3d5460 100644
--- a/chessx.pro
+++ b/chessx.pro
@@ -41,7 +41,6 @@ sound {
   QT += multimedia
 }
 
-DEFINES += QUAZIP_STATIC
 DEFINES += QT_NO_CAST_TO_ASCII
 DEFINES *= QT_USE_QSTRINGBUILDER
 
@@ -85,6 +84,57 @@ unix|!macx {
     binfiles.path = $$BINDIR
 }
 
+link_pkgconfig {
+  PKGCONFIG += quazip1-qt5 zlib
+}
+else {
+  HEADERS += \
+      src/quazip/JlCompress.h \
+      src/quazip/crypt.h \
+      src/quazip/ioapi.h \
+      src/quazip/quaadler32.h \
+      src/quazip/quachecksum32.h \
+      src/quazip/quacrc32.h \
+      src/quazip/quagzipfile.h \
+      src/quazip/quaziodevice.h \
+      src/quazip/quazip.h \
+      src/quazip/quazip_global.h \
+      src/quazip/quazipdir.h \
+      src/quazip/quazipfile.h \
+      src/quazip/quazipfileinfo.h \
+      src/quazip/quazipnewinfo.h \
+      src/quazip/unzip.h \
+      src/quazip/zip.h
+
+  SOURCES += \
+      src/quazip/JlCompress.cpp \
+      src/quazip/qioapi.cpp \
+      src/quazip/quaadler32.cpp \
+      src/quazip/quacrc32.cpp \
+      src/quazip/quagzipfile.cpp \
+      src/quazip/quaziodevice.cpp \
+      src/quazip/quazip.cpp \
+      src/quazip/quazipdir.cpp \
+      src/quazip/quazipfile.cpp \
+      src/quazip/quazipnewinfo.cpp \
+      src/quazip/unzip.cpp \
+      src/quazip/zip.cpp
+
+  INCLUDEPATH += src/quazip
+  DEFINES += QUAZIP_STATIC
+
+  INCLUDEPATH += $$[QT_INSTALL_PREFIX]/src/3rdparty/zlib
+  win32 {
+    # DEFINES += ZLIB_WINAPI
+    # LIBS += -lz
+    INCLUDEPATH += $$[QT_INSTALL_HEADERS]/QtZlib
+    win32-g++:LIBS += -lz
+  }
+  else {
+    LIBS += -lz
+  }
+}
+
 scid {
   # Scid sources
   HEADERS += \
@@ -338,23 +388,7 @@ HEADERS += src/database/board.h \
   src/gui/textbrowserex.h \
   src/gui/textedit.h \
   src/gui/toolmainwindow.h \
-  src/gui/translatingslider.h \
-  src/quazip/JlCompress.h \
-  src/quazip/crypt.h \
-  src/quazip/ioapi.h \
-  src/quazip/quaadler32.h \
-  src/quazip/quachecksum32.h \
-  src/quazip/quacrc32.h \
-  src/quazip/quagzipfile.h \
-  src/quazip/quaziodevice.h \
-  src/quazip/quazip.h \
-  src/quazip/quazip_global.h \
-  src/quazip/quazipdir.h \
-  src/quazip/quazipfile.h \
-  src/quazip/quazipfileinfo.h \
-  src/quazip/quazipnewinfo.h \
-  src/quazip/unzip.h \
-  src/quazip/zip.h
+  src/gui/translatingslider.h
 
 SOURCES += \
   src/database/analysis.cpp \
@@ -506,34 +540,13 @@ SOURCES += \
   src/gui/testadapter.cpp \
   src/gui/textedit.cpp \
   src/gui/toolmainwindow.cpp \
-  src/gui/translatingslider.cpp \
-  src/quazip/JlCompress.cpp \
-  src/quazip/qioapi.cpp \
-  src/quazip/quaadler32.cpp \
-  src/quazip/quacrc32.cpp \
-  src/quazip/quagzipfile.cpp \
-  src/quazip/quaziodevice.cpp \
-  src/quazip/quazip.cpp \
-  src/quazip/quazipdir.cpp \
-  src/quazip/quazipfile.cpp \
-  src/quazip/quazipnewinfo.cpp \
-  src/quazip/unzip.cpp \
-  src/quazip/zip.cpp
+  src/gui/translatingslider.cpp
 
 TEMPLATE = app
 INCLUDEPATH += src/database
 INCLUDEPATH += src/guess
 INCLUDEPATH += src/gui
 INCLUDEPATH += src/dialogs
-INCLUDEPATH += src/quazip
-INCLUDEPATH += $$[QT_INSTALL_PREFIX]/src/3rdparty/zlib
-
-win32 {
-  # DEFINES += ZLIB_WINAPI
-  # LIBS += -lz
-  INCLUDEPATH += $$[QT_INSTALL_HEADERS]/QtZlib
-  win32-g++:LIBS += -lz
-}
 
 UI_DIR = src/generated
 MOC_DIR = src/generated
@@ -551,15 +564,6 @@ CONFIG(release, debug|release) {
   DEFINES += QT_NO_DEBUG_OUTPUT NDEBUG
 }
 
-!win32 {
-  CONFIG(debug, debug|release) {
-    LIBS += -lz
-  }
-  CONFIG(release, debug|release) {
-    LIBS += -lz
-  }
-}
-
 TARGET = chessx
 
 ICON = data/images/chessx.icns
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 858399ff..43a533a1 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -50,8 +50,6 @@
 #include "output.h"
 #include "pgndatabase.h"
 #include "playerlistwidget.h"
-#include "quazip.h"
-#include "quazipfile.h"
 #include "savedialog.h"
 #include "settings.h"
 #include "style.h"
@@ -62,6 +60,14 @@
 #include "translatingslider.h"
 #include "version.h"
 
+#ifdef QUAZIP_STATIC
+#include "quazip.h"
+#include "quazipfile.h"
+#else
+#include <quazip/quazip.h>
+#include <quazip/quazipfile.h>
+#endif
+
 #include <time.h>
 
 #include <QApplication>
-- 
2.39.1