>From b2f4822b3a1c8f76d2c6dcf39590d3810d3510bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=8B=E6=96=87=E6=AD=A6?= <address@hidden>
Date: Sun, 3 Sep 2017 17:38:57 +0800
Subject: [PATCH 2/2] gnu: qt: Fix install paths in submodules.

Before this, the paths in pkg-config (.pc) and libtool (.la) files of
submodules are all pointing to qtbase.

* gnu/packages/qt.scm (qtsvg)[arguments]: Use a customized qt.conf to
override install paths to $out.
---
 gnu/packages/qt.scm | 57 +++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 40 insertions(+), 17 deletions(-)

diff --git a/gnu/packages/qt.scm b/gnu/packages/qt.scm
index 80508f058..771a03bd5 100644
--- a/gnu/packages/qt.scm
+++ b/gnu/packages/qt.scm
@@ -554,25 +554,48 @@ developers using C++ or QML, a CSS & JavaScript like language.")
      `(#:phases
        (modify-phases %standard-phases
          (replace 'configure
-           (lambda* (#:key outputs #:allow-other-keys)
-             (let ((out (assoc-ref outputs "out")))
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (qtbase (assoc-ref inputs "qtbase"))
+                    (tmpdir (string-append (getenv "TMPDIR")))
+                    (qmake (string-append tmpdir "/qmake"))
+                    (qt.conf (string-append tmpdir "/qt.conf")))
+               ;; Use qmake with a customized qt.conf to override install
+               ;; paths to $out.
+               (symlink (which "qmake") qmake)
+               (with-output-to-file qt.conf
+                 (lambda ()
+                   ;; Thoese must be kept in sync with qtbase.
+                   (format #t "[Paths]
+Prefix=~a
+ArchData=lib/qt5
+Data=share/qt5
+Documentation=share/doc/qt5
+Headers=include/qt5
+Libraries=lib
+LibraryExecutables=lib/qt5/libexec
+Binaries=bin
+Tests=tests
+Plugins=lib/qt5/plugins
+Imports=lib/qt5/imports
+Qml2Imports=lib/qt5/qml
+Translations=share/qt5/translations
+Settings=etc/xdg
+Examples=share/doc/qt5/examples
+HostPrefix=~a
+HostData=lib/qt5
+HostBinaries=bin
+HostLibrariesPath=lib
+" out qtbase)))
+
                ;; Valid QT_BUILD_PARTS variables are:
                ;; libs tools tests examples demos docs translations
-               (zero? (system* "qmake" "QT_BUILD_PARTS = libs tools tests"
-                               (string-append "PREFIX=" out))))))
-         (add-before 'install 'fix-Makefiles
-           (lambda* (#:key inputs outputs #:allow-other-keys)
-             (let ((out    (assoc-ref outputs "out"))
-                   (qtbase (assoc-ref inputs "qtbase")))
-               (substitute* (find-files "." "Makefile")
-                            (((string-append "INSTALL_ROOT)" qtbase))
-                             (string-append "INSTALL_ROOT)" out)))
-               #t)))
-            (add-before 'check 'set-display
-              (lambda _
-                ;; make Qt render "offscreen", required for tests
-                (setenv "QT_QPA_PLATFORM" "offscreen")
-                #t)))))))
+               (zero? (system* qmake "QT_BUILD_PARTS = libs tools tests")))))
+         (add-before 'check 'set-display
+           (lambda _
+             ;; make Qt render "offscreen", required for tests
+             (setenv "QT_QPA_PLATFORM" "offscreen")
+             #t)))))))
 
 (define-public qtimageformats
   (package (inherit qtsvg)
-- 
2.13.3