qt5: reduce closure size

First, closure size is reduced by including the static libraries in $out instead
of trying to move them to $dev. The Qt build system cannot handle libraries
being split between different prefixes. Previously, the static libraries were
moved into $dev and the shared libraries were symlinked from $out to $dev to
fool the build system. However, this causes $dev to be retained at
runtime. Instead, we now keep the static libraries in $out. Fortunately, the
static libraries are not very large anyway.

Second, we build with QT_NO_DEBUG defined unless debugging is enabled. This
causes some assertions to be removed; when assertions are included, they pull
paths from $dev into the runtime closure by using the __FILE__ macro. We also
now patch qtbase to remove even more assertions when QT_NO_DEBUG is defined.

1 files changed, 2 insertions, 0 deletions

diff --git a/pkgs/development/libraries/qt-5/mkDerivation.nix b/pkgs/development/libraries/qt-5/mkDerivation.nix
index 385ebeacd8f..97bd09c327b 100644
--- a/pkgs/development/libraries/qt-5/mkDerivation.nix
+++ b/pkgs/development/libraries/qt-5/mkDerivation.nix
@@ -14,6 +14,8 @@ let
       ++ optional (debug != null)
           (if debug then "CONFIG+=debug" else "CONFIG+=release");
 
+    NIX_CFLAGS_COMPILE = optional (debug != null) "-DQT_NO_DEBUG";
+
     cmakeFlags =
       (args.cmakeFlags or [])
       ++ [ "-DBUILD_TESTING=OFF" ]