These haven't been updated since their addition, so this updates the list that
controls which qt base translations are bundled with the macOS binary, to all the
languages that are available with qt 5.9.8.
This could probably be improved in some way, however qt updates are infrequent,
and I didn't want to spend any more time looking at this. Also given that no-one
seems to have noticed and/or reported this it wouldn't seem high-priority.
Could be backported to 0.20.1.
Catalina SDK clang stopped automatically searching the SDK include paths when
invoked without --sysroot:
https://github.com/bitcoin/bitcoin/pull/16367#issuecomment-594600985https://github.com/Homebrew/homebrew-core/issues/45061
This hasn't been a problem for current native depends packages because are
passing their own --sysroot values, and hasn't been a problem for current host
packages because they use `darwin_` commands instead of `build_darwin_`
commands. But the current `build_darwin_CC` and `build_darwin_CXX` commands
are still unnecessarily fragile, and incompatible with new native depends
packages added in https://github.com/bitcoin/bitcoin/pull/18677.
Cory Fields <cory-nospam-@coryfields.com> suggested in
https://github.com/bitcoin/bitcoin/pull/16367#issuecomment-595393546 switching
compiler from SDK clang to native clang (from $PATH) to avoid this problem.
This is easy and makes a certain amount of sense for building native packages,
as opposed to host packages. But fanquake <fanquake@gmail.com> pointed out in
https://github.com/bitcoin/bitcoin/pull/18677#discussion_r409934309 that it
would be inconsistent use switch to non-SDK compilers while still using other
SDK tools like ranlib and install_name_tool. So simplest, minimal fix seems to
be just adding the missing --sysroot option.
This change adds to the BITCOIN_QT_CONFIGURE script ability to use
pkg-config for MinGW. All of the non-pkg-config paths are removed as
needless.
If depends is built with DEBUG=1 the configure script fails to pickup
Qt:
- for macOS host (similar, but not the same as issue 16391)
- for Windows host (regression)
This change adds the correct suffix to debug mode .pc filenames for
MinGW and also to the Qt libraries listed in the `Requires` field.
The filename adjustment fixes the accidental overwriting of release
mode .pc files with the debug mode variant which required the wrong
variant of the libraries when `debug_and_release` is active.
Note that macOS also supports the `debug_and_release' configuration
but may use the regular library names together with DYLD_IMAGE_SUFFIX.
Creation of *_debug.pc files is turned off as they're identical to their
non-debug counterparts.
More info:
- QTBUG-4155
- Qt commit a0d8fb4ac3cb7bafdb39f340055eacee4f957513
cb9e88e73a build: don't embed a build-id when building libdmg-hfsplus (fanquake)
Pull request description:
There was a [reproducibility issue (IRC logs)](http://www.erisian.com.au/bitcoin-core-dev/log-2020-01-25.html) with the osx `0.19.1rc1` gitian builds. The `build-id` embedded into the `dmg` tool was mismatching. It's possible that differing versions of binutils/ld were the cause.
While it was resolved after rebuilding the base gitian image, whether an upstream package issue or fluke, we can remove the possibility of it happening in future by just not embedding a build-id into the `dmg` tool at all. Can close if it's not deemed worth it.
You can test this change using the following:
```bash
# build libdmg
make native_libdmg-hfsplus_built -C depends/ HOST=x86_64-apple-darwin16 -j6 V=1
# master
readelf --string-dump .note.gnu.build-id /bitcoin/depends/work/build/x86_64-apple-darwin16/native_libdmg-hfsplus/7ac55ec64c96f7800d9818ce64c79670e7f02b67-3830944ef98/build/dmg/dmg
String dump of section '.note.gnu.build-id':
[ c] GNU
[ 11] CjRa?]?^V8?v?;%n??
# this pr
readelf --string-dump .note.gnu.build-id /bitcoin/depends/work/build/x86_64-apple-darwin16/native_libdmg-hfsplus/7ac55ec64c96f7800d9818ce64c79670e7f02b67-a72f53ab110/build/dmg/dmg
readelf: Warning: Section '.note.gnu.build-id' was not dumped because it does not exist!
```
ACKs for top commit:
laanwj:
tested ACK cb9e88e73a
Tree-SHA512: 191eed32ed0a04a908f9c1b22188180b2db2f35bae0281940f0f9da2450c5c6807cd6ff5bbcce7c933a9133387b127c3478f7a39a2918c14f17be19fd9ea19b4
fae9084ac5 build: Skip i686 build by default in guix and gitian (MarcoFalke)
fa55a2554c depends: Remove reference to win32 (MarcoFalke)
Pull request description:
Closes#17504
Now that we no longer provide downloads for i686 on our website (https://bitcoincore.org/en/download/), there is no need to build them by default.
i686 can still be built in depends (tested by ci/travis) and in guix/gitian by setting the appropriate `HOSTS`.
ACKs for top commit:
practicalswift:
ACK fae9084ac5 -- patch looks correct
dongcarl:
ACK fae9084ac5 patch looks correct
laanwj:
Code review ACK fae9084ac5
hebasto:
ACK fae9084ac5, I have reviewed the code and it looks OK, I agree it can be merged.
Tree-SHA512: b000c19a2cd2a596a52028fa298c4022c24cfdfc1bdb3795a90916d0a00a32e4dd22278db93790b6a11724e08ea8451f4f05c77bc40d1664518e11a8c82d6e29
0e519fe284 build: Fix behavior when ALLOW_HOST_PACKAGES unset (Hennadii Stepanov)
Pull request description:
On master (f05c1ac444) during building with depends host packages are always considered by `pkg-config` regardless of `ALLOW_HOST_PACKAGES` environment variable. This causes issues like #18042.
This is an alternative to #18042 and #18045.
On master:
```
$ make HOST=x86_64-apple-darwin16 -C depends
$ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
...
checking for QT_DBUS... yes
...
checking whether to build GUI with support for D-Bus... yes
...
```
---
With this PR:
1) `ALLOW_HOST_PACKAGES` unset
```
$ make HOST=x86_64-apple-darwin16 -C depends
$ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
...
checking for QT_DBUS... no
...
checking whether to build GUI with support for D-Bus... no
...
```
2) `ALLOW_HOST_PACKAGES=1`
```
$ make HOST=x86_64-apple-darwin16 ALLOW_HOST_PACKAGES=1 -C depends
$ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
...
checking for QT_DBUS... yes
...
checking whether to build GUI with support for D-Bus... yes
...
```
ACKs for top commit:
jonasschnelli:
Tested ACK 0e519fe284 - After this PR (and after a `make clean` & `make HOST=x86_64-apple-darwin16` in depends), the macOS depends build on a Debian machine with qt as host package worked (it fails on master due to `ENABLE_DBUS=1`).
Tree-SHA512: d11e1c2bc8ce8a07f3f9b465b01c9b2c814afe75b085a8b88aab74fd3a922aa98180c447457dfc4174515513181c5f4edc521978a1d3d0a112106c98b5c73c0e
All other mk files use the package variable consistently except for the two instances here, which have always been here, since depends was introduced in 0.10.
e97f5c1823 depends: don't configure xcb_proto (fanquake)
Pull request description:
xcb_proto's configure doesn't understand `--disable-shared` or
`--with-pic`. All the package does it put a stack of XML files into
a directory to be used by libxcb.
Probably enough to close#16354.
ACKs for top commit:
dongcarl:
ACK e97f5c1823
Tree-SHA512: 1a49fd7c8269405bbf312be33c1aeaac5f25ef8666829b01dc3c58f3a2a9281c23c42614a7f1cfc3ee260be4ea3e71285869b1cb9c2035dceda336296d9d9dea
11113247c3 depends: Support for S390X targets (MarcoFalke)
989fd539d5 depends: Support for 64-bit POWER targets (Luke Dashjr)
Pull request description:
Failure before:
```
$ make -C depends HOST=powerpc64-linux-gnu
...
ERROR: Feature 'system-zlib' was enabled, but the pre-condition 'libs.zlib' failed.
ERROR: Feature 'xcb' was enabled, but the pre-condition 'libs.xcb' failed.
ERROR: Feature 'system-freetype' was enabled, but the pre-condition 'features.freetype && libs.freetype' failed.
ERROR: Feature 'fontconfig' was enabled, but the pre-condition '!config.win32 && !config.darwin && features.system-freetype && libs.fontconfig' failed.
make: *** [funcs.mk:254: /bitcoin/depends/work/build/powerpc64-linux-gnu/qt/5.9.8-95548079095/qtbase/.stamp_configured] Error 3
$ make -C depends HOST=s390x-linux-gnu
...
ERROR: Feature 'system-zlib' was enabled, but the pre-condition 'libs.zlib' failed.
ERROR: Feature 'xcb' was enabled, but the pre-condition 'libs.xcb' failed.
ERROR: Feature 'system-freetype' was enabled, but the pre-condition 'features.freetype && libs.freetype' failed.
ERROR: Feature 'fontconfig' was enabled, but the pre-condition '!config.win32 && !config.darwin && features.system-freetype && libs.fontconfig' failed.
make: *** [funcs.mk:254: /bitcoin/depends/work/build/s390x-linux-gnu/qt/5.9.8-79c6d6ca6ec/qtbase/.stamp_configured] Error 3
```
ACKs for top commit:
laanwj:
Code review ACK 11113247c3
dongcarl:
tested ACK 11113247c3
practicalswift:
ACK 11113247c3 -- diff looks correct
Tree-SHA512: f990101ced0ed579168bb25762c1296c9b512c597bab924013af41832670a69ed786c6ec9b654c95fe064187797880a66c575395bc102a914c1bdb323ca7538a
2359a4790d depends: don't use OpenGL in Qt on macOS (fanquake)
ba0cad2702 build: pass -dead_strip_dylibs to ld on macOS (fanquake)
Pull request description:
Based on #17663. OpenGL on macOS was also deprecated in 10.14.
This also removes the `/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL` dylib from `bitcoin-qt`.
ACKs for top commit:
laanwj:
ACK 2359a4790d
jonasschnelli:
utACK 2359a4790d
hebasto:
ACK 2359a4790d
Tree-SHA512: 39b0151832c829f6ebdc4910eb28ebbeba64539cd04eba6ce3ec75fc0f231569956ca51a1e0bffc76dd27e85643c65a155320b9b450c49e9841e12b108406d41
xcb_proto's configure doesn't understand --disable-shared or
--with-pic. All the package does it put a stack of xml files into
a directory to be used by libxcb.
6fdf5dab26 depends: only use dbus with qt on linux (fanquake)
Pull request description:
Since #8210 we've been passing `-dbus-runtime` when configuring Qt, however D-Bus isn't used on macOS or Windows. So rather than blanket passing `-dbus-runtime`, only use D-Bus when building for linux, and disable it for Windows and macOS. This also saves some time building qt in depends (for windows or macOS).
This gist contains a diff of the symbols in a macOS bitcoin-qt after applying this change: https://gist.github.com/fanquake/317e5c9c7d1b5e37a0c1ce8001af18c4.
ACKs for top commit:
laanwj:
ACK 6fdf5dab26
Tree-SHA512: 7c7df6036f27dae6adb807edf94cd26b4dafa3728976d219a68f7388b6477777b35acebd507320e4469c9f2fcf016b311c82e0b12d50546cb5ab66a1e955e464
02ac445b2f bump libevent to 2.1.11 in depends (stefanwouldgo)
Pull request description:
this doesn't need patches on Android anymore like 2.1.8 did.
ACKs for top commit:
laanwj:
ACK 02ac445b2f
Tree-SHA512: 1fbfe342ee15fa4c5cb417979bd6c443f7c7aa40a489accf8ccd7c919e5b08e859b3da6edeee3de484f6f156b35dd4e97c7e2c7971b59fc31029865585ccb296
f9af3ced1c Android: add all arch support (Block Mechanic)
d419ca7e32 depends: export dynamic JNI symbols from static qtforandroid.a (Igor Cota)
ed30684d03 Qt: patch androidjnimain.cpp to make sure JNI is initialised when statically compiled (Igor Cota)
e4c319e8a1 builds: remove superfluous config_opts_aarch64_android (Igor Cota)
24ffef0c27 Patch libevent when building for Android (fix arc4random_addrandom) (Igor Cota)
f1e40b3e71 Update bitcoin_qt.m4 (BlockMechanic)
b4057d8261 Define TARGET_OS when host is android (Igor Cota)
80b475f159 Fix Android zlib cross compilation issue (https://stackoverflow.com/questions/21396988/zlib-build-not-configuring-properly-with-cross-compiler-ignores-ar) (Igor Cota)
45f8219015 Add full Android build example command and instructions on getting SDK/NDK (Igor Cota)
b68f2a68c2 Add config opts and patch for aarch64_android build of Qt (Igor Cota)
9c4cb0166e Add ranlib to android.mk hosts file (fix OSX Android NDK build) (Igor Cota)
c2a749c9c1 Add example Android host-platform-triplet and options (Igor Cota)
0b0cff3c61 Add support for building Android dependencies (Igor Cota)
Pull request description:
This allows one to build the dependencies with the Android SDK and goes towards fixing #11844. It has been tested to work with:
`make HOST=aarch64-linux-android ANDROID_API_LEVEL=28 ANDROID_TOOLCHAIN_BIN=/home/user/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin NO_QT=1 NO_WALLET=1`
ACKs for top commit:
Sjors:
ACK f9af3ce. I'm OK with merging and then improving later.
Tree-SHA512: cb805115ebe5c9e33db2bf3eab8628808fe3f50052053d8877d8b8e4406d6fea1ed9e5c4dff85d777fb99c81be6ffb9d95a0e6d32344e728e5e0da6c653e2ce7
8c6081a884 compat: remove bswap_* check on macOS (fanquake)
2cba35ab38 build: skip building OpenSSL lib_ssl (fanquake)
45a2d3c552 build: remove OpenSSL from Qt build (fanquake)
befbc40eb5 build: remove EVP_MD_CTX_new detection (fanquake)
fcee10c2d0 build: remove SSL lib detection (fanquake)
c7f30dbca8 gui: Update BIP70 support message (fanquake)
a3e810326d build: remove BIP70 entries from macOS Info.plist (fanquake)
72fe13a58d gui: remove payment request file handling from OpenURI dialog (fanquake)
3548e4aac7 Remove BIP70 Support (fanquake)
1cb9a4e28c docs: remove protobuf from docs (fanquake)
67328bb7ca build: remove protobuf from depends (fanquake)
Pull request description:
This removes [BIP70](https://github.com/bitcoin/bips/blob/master/bip-0070.mediawiki) support. It also removes OpenSSL linking from Qt and building OpenSSLs `lib_ssl` in depends, as well as SSL lib detection from the build system. It's something that I'd optimistically like to do for `0.20.0`.
ACKs for top commit:
laanwj:
Code review ACK 8c6081a884
MarcoFalke:
ACK 8c6081a884
fjahr:
ACK 8c6081a
Tree-SHA512: 9dd9153afa4eca1a795f983e5b31f5fee9fa9a064c2a95d2f98810689add3ad0bf221c4608282299e66e4d1ec31cd556d4b16eea55de7912c3b9931f64735883
The ancient "darwin-4.9.1" profile has long been used to match against
clang, which prior to version 9, reported 4.9.1 as its version when
invoking "clang++ -dumpversion". Presumably this was a historical
compatibility quirk related to Apple's switch from gcc to clang.
This was "fixed" in clang 9.0, so that -dumpversion reports the real
version. Unfortunately that had the side-effect of breaking the
(brittle) boost compiler detection.
Move to the seemingly more-correct "clang-darwin" profile, which passes
the checks and builds correctly.
Also switch to using ar rather than libtool for archiving, as it's what
the clang-darwin profile expects to be using.
Note that because this is using a different profile, some of the final
command-line arguments end up changing. The changes look sane at a
glance.
1ba49bcdc2 build: pass --enable-option-checking to applicable packages (fanquake)
bcff8e21b1 build: only pass --disable-dependency-tracking to packages that understand it (fanquake)
Pull request description:
By blanket passing `--disable-dependency-tracking` to all depends packages we end up with warnings (i.e in `bdb` or `freetype`) like:
```bash
configure: WARNING: unrecognized options: --disable-dependency-tracking
```
Instead, only pass it to packages that actually understand it. Related to https://github.com/bitcoin/bitcoin/issues/16354.
More info on `--disable-dependency-tracking` available [here](https://www.gnu.org/software/automake/manual/html_node/Dependency-Tracking.html).
This PR also adds `--enable-option-checking` as a configure option to all applicable packages.
ACKs for top commit:
laanwj:
ACK 1ba49bcdc2
theuni:
ACK 1ba49bcdc2
Tree-SHA512: 6d3143ad5f5d1abed5e0a0b2ffbb4323f21c7bf24b0b8df26fb1b3cd16cf5309bbb830aa5aaec99164d5bbe8e9c62b97aa3e97ee1ddc2c7612bf8ff88a63885e
a0daea459c [build] depends macOS: point --sysroot to SDK (Sjors Provoost)
Pull request description:
Fixes errors like `fatal error: 'unistd.h' file not found` when building depends on macOS.
Replaces #14352 (which doesn't work on Catalina).
ACKs for top commit:
jonasschnelli:
utACK a0daea459c
Tree-SHA512: 995b1e1e84e635b32d1d4038bc63730c94a7c318b7240f6d62825977e5c97fe52c5aa5a0f39070beb0df8271dd294b36d6b5cf7f09ad07494fb15d5bd4d77f68
By blanket passing --disable-dependency-tracking to all depends packages
we end up with some warnings like:
configure: WARNING: unrecognized options: --disable-dependency-tracking
So instead, only pass it to packages that understand it.
Related to https://github.com/bitcoin/bitcoin/issues/16354.
463a1d5244 Refresh ZeroMQ 4.3.1 patch (Nathan Marley)
Pull request description:
Currently in Alpine Linux (latest, 3.10) in the depends system, one of the ZeroMQ patches won't apply cleanly because the context around the patch has changed and Alpine's `patch` implementation can't handle the diff.
Some patch implementations can't handle fuzz / too much divergence from the original code.
This PR just tweaks the context code around the patch so that less-sophisticated patch implementations (such as on Alpine Linux) can apply the patch without errors.
This partially fixes#16925
ACKs for top commit:
fanquake:
ACK 463a1d5244 - Tested building zeromq in depends inside an [Alpine container](https://github.com/fanquake/core-review/blob/master/docker/alpine.dockerfile) as well as on macOS.
Tree-SHA512: d6e3cb60835cdd090b9b864ca9cb33961687606bc9184fbbeb7a54ec23db4057b9317b65c5c276fb8c5492cb3cfcc4a7f3369f049551f4eb0915db971f2290ce
568aa0cf83 Add OpenSSL termios fix for musl libc (Nathan Marley)
Pull request description:
Currently the version of OpenSSL included in the depends system won't build on musl based systems because `termio.h` does not exist. The proper header named `termios.h` does exist.
This PR adds a patch for OpenSSL to replace the `termio.h` header with `termios.h`, which is the proper POSIX header as I understand it.
This is a known issue as `TERMIOS` (not `TERMIO`) should be the default, and is fixed in later versions of OpenSSL. There is discussion on the OpenSSL repo here: openssl/openssl#163
This has been [fixed in OpenSSL](64e6bf64b3).
This partly fixes#16925 and allows building Bitcoin on Alpine using the depends system.
ACKs for top commit:
laanwj:
ACK 568aa0cf83
Tree-SHA512: d0aac116b7a1133bdecb34a9fb6c63db0336a3547585c07ed31ac9c5edb97e9570dcbf931e7fbc7172ce0735b6bfc11fb204e015532fcd90496a233e8fc17081
Some patch implementations can't handle fuzz / too much divergence from the
original code.
This just tweaks the context code around the patch so that less-sophisticated
patch implementations (such as on Alpine Linux) can apply the patch without
errors.
f0636d3418 depends: zlib: Move toolchain options to configure (Carl Dong)
Pull request description:
```
zlib has its own custom configure script, see comment in zlib.mk for
more details
```
Performed Guix cross-builds locally and everything worked as expected.
ACKs for top commit:
laanwj:
ACK f0636d3418
Tree-SHA512: 7ff6114e52a9c49941da31cb0ebd8918b056bf23343790d758e107003d856f3b1f16ebf4ce0ce22e1216a37a610b4c106def3f869d128bfffa61280d45ed6b38
QMAKE_LFLAGS was removed from qtbase/mkspecs/win32-g++/qmake.conf in
39fc377bf105ba09e2a8f9acae467dc789b96525. Here, we add it back in with
our LDFLAGS from depends before the first occurance of any
QMAKE_LFLAGS_* variable settings.
0c6054fc9f depends: Bump QT to LTS release 5.9.8 (THETCR)
Pull request description:
This update is only a minor version but in contrary to 5.9.7 it's a LTS release.
It doesn't add any new functionality to Qt but fixes multiple security issues and bugs.
Including some race conditions and annoying bugs on macOS.
ACKs for top commit:
Sjors:
ACK 0c6054fc9f. Lightly tested on macOS 10.14.6. Not really sure what difference would matter on macOS.
Tree-SHA512: f01d947cc0db6d761e32551071fa00fe8014fb7b2ce707271a159bb61c6d60e062ac8f4da5f36bd8fc4736e1e852368a1353ea3f994f61f1d0c76cc7d1664938
c295cba5a2 depends: zeromq: disable draft classes and methods (fanquake)
0072237b9e depends: xproto: configure flags cleanup (fanquake)
6a8ada3a4f depends: qrencode: configure flags cleanup (fanquake)
86beb8cdc4 depends: fontconfig: configure flags cleanup (fanquake)
e656d95ec7 depends: libxcb: configure flags cleanup (fanquake)
e439388b35 depends: libXau: configure flags cleanup (fanquake)
Pull request description:
Related to #16354.
This PR adds additional configure flags to packages in depends to explicitly disable features we aren't using; similar to #16183. It also fixes passing `--without-tools` to `qrencode`.
I've added `--disable-drafts` to `zeromq`:
```bash
Build and install draft classes and methods [default=yes]
```
I'm not entirely sure how far we want to take this. i.e in the `zeromq` package we explicitly pass `--without-libsodium`, even though it's disabled by default.
Do we also want to explicitly pass all the other `--without` flags? :
```bash
--with-libgssapi_krb5 require libzmq build with libgssapi_krb5
[default=no]
--with-libsodium use libsodium instead of built-in tweetnacl
[default=no]
--with-pgm build libzmq with PGM extension. Requires pkg-config
[default=no]
--with-norm build libzmq with NORM protocol extension,
optionally specifying norm path [default=no]
--with-vmci build libzmq with VMCI transport [default=no]
```
ACKs for top commit:
dongcarl:
ACK c295cba5a2
Tree-SHA512: df6d38b863b4008ed2cb06c97eb0e21eaa4b5fde552876065ba7f3c87bf6e372e5b954a51bf3fde2151cfb6d2c022227d34337fc6e50ce0caa1d518abbd2412a
Because we pass -qt-xcb to Qt, it will compile in a set of xcb helper libraries and extensions.
So skip building all of the libxcb extensions when we build libcxb in depends.
More info is available here: https://doc.qt.io/qt-5.9/linux-requirements.html
f509e3b8ce doc: remove line numbers from qt package links (fanquake)
1bb1661a40 doc: fix typo in bitcoin_qt.m4 comment (fanquake)
0aeb98ac1f build: remove jpeg lib check from bitcoin_qt.m4 (fanquake)
98a64bd296 build: disable libjpeg in qt (fanquake)
Pull request description:
When gitian building on Windows I'm seeing:
```bash
checking for Qt 5... yes
checking for > Qt 5.7... yes
checking for main in -limm32... yes
checking for main in -lz ... yes
checking for library containing jpeg_create_decompress ... configure: WARNING: libjpeg not found. Assuming qt has it built-in
no
checking for library containing png_error ... -lqtlibpng
checking for library containing pcre2_match_16... -lqtpcre2
checking for library containing hb_ot_tags_from_script ... -lqtharfbuzz
```
We are passing `-qt-libjpeg` to Qt:
e6e99d4f75/depends/packages/qt.mk (L66)
but I dont think we are doing anything with `jpeg` related regardless?
ACKs for top commit:
laanwj:
ACK f509e3b8ce
promag:
ACK f509e3b8ce.
Tree-SHA512: 61ea20c11df11b9d426644df9a01aac12b76897003121a283fc784a8c30e9b5ad34c9805069fec20926f7aa279e59528e2e13697a944a22760c3acb6366fffbe
libXext was only needed (as a library) by QT when it was using
XLib/libX11 (as a library), now that we're building QT without
XLib/libX11, we can safely remove libXext.
