QtWebEngine's build system is setup to perform certain platform checks
(see mkspecs/features/platform.prf). But a failed check will not cause
configuration phase to fail, but instead it configures no build targets.
So in such case the build will successfully perform build and install
phases. An empty output directories will are produced and the build
succeeds.
This patches qtwebengine qmake files to properly fail during
configuration phase.
This doesn't touch qt56 as it doesn't have this mechanism.
This reverts commit 0b49d5dd687a540c259400c1082ea660b9b9961a #55500.
I'm sorry, I'm unable to fix the build quickly in other way than
atop the older version. Certainly feel free to improve the approach.
I noticed by creating `buildEnv` where I accidentally put a derivation
from `pkgs.writeText` into `paths` and got a broken build with the
following misleading error message:
```
Use of uninitialized value $stat1 in numeric ne (!=) at /nix/store/9g4wc31j7a2xp22xpgwr0qssfxahxdzl-builder.pl line 74.
Use of uninitialized value $stat1 in bitwise and (&) at /nix/store/9g4wc31j7a2xp22xpgwr0qssfxahxdzl-builder.pl line 75.
different permissions in `' and `/nix/store/0vy5ss91laxvwkyvrbld5hv27i88qk5w-noise': 0000 <-> 0444 at /nix/store/9g4wc31j7a2xp22xpgwr0qssfxahxdzl-builder.pl line 75.
```
It can be reproduced with an expression like this:
``` nix
{ pkgs ? import <nixpkgs> { } }:
let
file = pkgs.writeText "test" ''
content
'';
in
pkgs.buildEnv {
name = "test-env";
paths = [ /* ... */ file ];
}
```
This reverts commit ac682e362c07929b2b30bfdf4f75cd1c5250d3e7.
This broke iOS building on master. Even Xcode 8.2 comes with TAPI
librarises. We need these patches to support those .tbd files.
Eventually we will move to using libtapi directly, but I have not
finished work on this right now.
Unfortunately, this will not have my changes for building cctools with
manpages. We will have to do this update at some later time.
