This file is part of MXE. See LICENSE.md for licensing information.

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mark Brand <mabrand@mabrand.nl>
Date: Thu, 3 Nov 2011 14:11:02 +0100
Subject: [PATCH 1/3] [MXE] pkg-config support for libtiff-4


diff --git a/config.tests/libtiff/libtiff.pro b/config.tests/libtiff/libtiff.pro
index 1111111..2222222 100644
--- a/config.tests/libtiff/libtiff.pro
+++ b/config.tests/libtiff/libtiff.pro
@@ -2,5 +2,7 @@ SOURCES = libtiff.cpp
 CONFIG -= qt dylib
 mac:CONFIG -= app_bundle
 win32:CONFIG += console
-unix|mingw: LIBS += -ltiff
+CONFIG += link_pkgconfig
+packagesExist(libtiff-4):PKGCONFIG += libtiff-4
+else:if(unix|win32-g++*): LIBS += -ltiff
 else:win32: LIBS += libtiff.lib
diff --git a/src/plugins/imageformats/tiff/tiff.pro b/src/plugins/imageformats/tiff/tiff.pro
index 1111111..2222222 100644
--- a/src/plugins/imageformats/tiff/tiff.pro
+++ b/src/plugins/imageformats/tiff/tiff.pro
@@ -5,7 +5,9 @@ SOURCES += main.cpp qtiffhandler.cpp
 OTHER_FILES += tiff.json
 
 config_libtiff {
-    unix|mingw: LIBS += -ltiff
+    CONFIG += link_pkgconfig
+    packagesExist(libtiff-4):PKGCONFIG += libtiff-4
+    else:if(unix|win32-g++*): LIBS += -ltiff
     else:win32: LIBS += libtiff.lib
 } else {
     include($$PWD/../../../3rdparty/libtiff.pri)

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mark Brand <mabrand@mabrand.nl>
Date: Wed, 19 Dec 2012 23:29:52 +0100
Subject: [PATCH 2/3] [MXE] pkg-config support for libmng


diff --git a/config.tests/libmng/libmng.pro b/config.tests/libmng/libmng.pro
index 1111111..2222222 100644
--- a/config.tests/libmng/libmng.pro
+++ b/config.tests/libmng/libmng.pro
@@ -2,5 +2,7 @@ SOURCES = libmng.cpp
 CONFIG -= qt dylib
 mac:CONFIG -= app_bundle
 win32:CONFIG += console
-unix|mingw: LIBS += -lmng
+CONFIG += link_pkgconfig
+packagesExist(libmng):PKGCONFIG += libmng
+else:if(unix|win32-g++*): LIBS += -lmng
 else:win32: LIBS += libmng.lib
diff --git a/src/plugins/imageformats/mng/qmnghandler.pri b/src/plugins/imageformats/mng/qmnghandler.pri
index 1111111..2222222 100644
--- a/src/plugins/imageformats/mng/qmnghandler.pri
+++ b/src/plugins/imageformats/mng/qmnghandler.pri
@@ -3,7 +3,9 @@ INCLUDEPATH *= $$PWD
 HEADERS += $$PWD/qmnghandler_p.h
 SOURCES += $$PWD/qmnghandler.cpp
 config_libmng {
-    unix|mingw: LIBS += -lmng
+    CONFIG += link_pkgconfig
+    packagesExist(libmng):PKGCONFIG += libmng
+    else:if(unix|win32-g++*): LIBS += -lmng
     else:win32: LIBS += libmng.lib
 } else {
     include($$PWD/../../../3rdparty/libmng.pri)

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mark Brand <mabrand@mabrand.nl>
Date: Fri, 16 Nov 2018 10:13:11 +0100
Subject: [PATCH 3/3] [MXE] pkg-config support for libwebp


diff --git a/config.tests/libwebp/libwebp.pro b/config.tests/libwebp/libwebp.pro
index 1111111..2222222 100644
--- a/config.tests/libwebp/libwebp.pro
+++ b/config.tests/libwebp/libwebp.pro
@@ -2,5 +2,9 @@ SOURCES = libwebp.cpp
 CONFIG -= qt dylib
 mac:CONFIG -= app_bundle
 win32:CONFIG += console
-unix|mingw: LIBS += -lwebp -lwebpdemux
+unix|mingw {
+    CONFIG += link_pkgconfig
+    packagesExist(libwebp libwebpdemux): PKGCONFIG += libwebp libwebpdemux
+    else: LIBS += -lwebp -lwebpdemux
+}
 else:win32: LIBS += libwebp.lib libwebpdemux.lib
diff --git a/src/plugins/imageformats/webp/webp.pro b/src/plugins/imageformats/webp/webp.pro
index 1111111..2222222 100644
--- a/src/plugins/imageformats/webp/webp.pro
+++ b/src/plugins/imageformats/webp/webp.pro
@@ -5,7 +5,11 @@ SOURCES += main.cpp qwebphandler.cpp
 OTHER_FILES += webp.json
 
 config_libwebp {
-    unix|win32-g++*: LIBS += -lwebp -lwebpdemux
+    unix|mingw {
+        CONFIG += link_pkgconfig
+        packagesExist(libwebp libwebpdemux): PKGCONFIG += libwebp libwebpdemux
+        else: LIBS += -lwebp -lwebpdemux
+    }
     else:win32: LIBS += libwebp.lib libwebpdemux.lib
 } else {
     include($$PWD/../../../3rdparty/libwebp.pri)