Adds default off configure flag to use compiler optimizations
for size instead of the default speed/size trade-off.
Change-Id: I36702064ef2cc743d2d03a386adf5cefd5371b6e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Neither the Intel compiler nor Visual C++ have a dedicated switch to
enable F16C support, like GCC and Clang do. So we used the AVX switch
for that in commit 8241d51f70, as it was
the closest, lowest denominator. That was incorrect and insufficient.
The Intel compiler silently miscompiles the intrinsics with -xAVX,
making calls to out-of-line functions like _mm_cvtps_ph, which don't
exist. So we actually have to use AVX2 support to generate correct code.
That might be a problem later, since Ivy Bridge supports F16C but not
AVX2.
Visual C++ is able to generate F16C code with just -arch:AVX.
Either way, since there's no dedicated command-line switch, there's also
no dedicated preprocessor macro. We're using __AVX2__ for both
compilers, as that's a sufficient condition to indicate a processor that
supports F16C.
Change-Id: I27b55fdf514247549455fffd14b205b8d8b86da7
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
The .pro file requires the QMAKE_CFLAGS_F16C to be set to something. So
set it to AVX, as the instructions require the VEX prefix anyway (ICC
has no dedicated option for just F16C).
Change-Id: I27b55fdf514247549455fffd14b171940afd35a2
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
They are the default with icc.
Change-Id: Ibc5c715fda334a75bd2efffd14a478c20b527d7c
Reviewed-by: Robert Pancoast <RobertPancoast77@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
There's no reason to have that. Let the compiler decide whether it wants
to align or not. Current versions seem not to want to align beyond
multiple of 2.
Change-Id: Iab7c358838e1487387a2fffd149d73e0a218d3c2
Reviewed-by: Dominik Haumann <dhaumann@kde.org>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
The problem isn't the compiler, but the linker, so we ought to turn this
flag on for all ELF-based systems where we compile Qt with -Bsymbolic,
but so far only the Intel compiler has been affected. We can turn it on
as needed for other systems.
The cause of the problem is the way that ICC materializes the pointer-
to-member-function: it stores the full 2*sizeof(void*) data in an
anonymous variable, so that it can load it in one go, such as one 16-
byte SSE aligned load on 64-bit systems. That relocation in a data
variable gets turned into a fixed-position copy relocation by the
linker, which breaks the signal-identification mechanism.
GCC and Clang are likely to be affected if anyone did:
static const auto destroyed = &QObject::destroyed;
QObject::connect(obj, destroyed, [](){});
Task-number: QTBUG-52439
Change-Id: I0d69eaf61af149db9574fffd149d0cfb08459c33
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
This warning does not make sense. it seems to trigger when in code like
the following in template functions:
auto x = 1, y = 2;
3373: nonstandard use of "auto" to both deduce the type from an
initializer and to announce a trailing return type
Other reports on the Internet indicate that no one understands what
triggers this warning and have just worked around it. Additionally, the
same warning exists on other compilers with the same text, so it's
likely come from the EDG front-end. This has been reported to Intel.
Change-Id: I73fa1e59a4844c43a109fffd148d45065ab69eff
Intel-Issue-ID: 6000164202
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
We no longer support any compilers that don't know the actual version
number of the standard.
Change-Id: Ib056b47dde3341ef9a52ffff13ef154791dd0d22
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
I added this sometime in the past to work around some ICC bug in
position-independent code. Modern versions don't have the bug.
Change-Id: I42e7ef1a481840699a8dffff140049ce927cdff2
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
See https://software.intel.com/node/522852. There are options to turn
off LTCG and, on Linux, to enable/disable fat objects.
Change-Id: I42e7ef1a481840699a8dffff14003db5a9c95b83
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
This linker script is only enabled for systems with GCC or GCC-like
compilers, though technically it should work on the BSDs too (will
enable after testing). For regular modules, this declares one ELF
version "Qt_5" and places all QtCore symbols inside, then it declares
unused ELF versions "Qt_5.x" for each older minor release. For modules
declared "internal_module", all symbols are placed in version
Qt_5_PRIVATE_API.
The big advantage of an ELF version is that, when we do Qt 6, both
versions of QtCore could be loaded in memory without conflicts and all
symbols would be resolved to the correct library. No module can talk to
both at the same time, but this avoids mistakes of loading them
indirectly by plugins.
The extra Qt_5.x versions will be used in the next commit.
Change-Id: I049a653beeb5454c9539ffff13e3fe6f050fdf31
Reviewed-by: Lisandro Damián Nicanor Pérez Meyer <perezmeyer@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
[ChangeLog][General Improvements] Qt's buildsystem now detects whether
the compiler supports C++14 and experimental support for C++1z. If the
compiler supports it, then Qt is automatically compiled using that
support.
\
This does not apply to user applications built using qmake: those are
still built with C++11 support only. To enable support for C++14 in your
application, add to your .pro file: CONFIG += c++14 (similarly for
C++1z).
Change-Id: Ib056b47dde3341ef9a52ffff13ef1f5d01c42596
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Prefer -std=gnu++11 unless strict_c++11 is defined. You can enable
strict C++11/C++14 mode by using
CONFIG += strict_c++
That is enabled for Qt's own code, so we we don't accidentally use GNU
extensions in portable code.
There's no support for strict C++98 mode (that is, the -ansi option).
[ChangeLog][qmake] By default, GNU extensions are now enabled with
Clang, GCC and ICC even in C++11 and C++14 modes. To disable the GNU
extensions, add to your .pro file: CONFIG += strict_c++.
Change-Id: Ib056b47dde3341ef9a52ffff13ef14de2169bef5
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
GCC 5 combined with a recent binutils have a new optimization that
allows them to generate copy relocations even in -fPIE code. Clang has
the same functionality when compiling an executable with -flto. We need
to let the compilers know that they cannot use copy relocations, so they
need to use really position-independent code.
Position independent code throughout is not really required. We just
need the compilers to use position-independent access to symbols coming
from the Qt libraries, but there's currently no other way of doing that.
Task-number: QTBUG-45755
Change-Id: I0d4913955e3745b69672ffff13db5df7377398c5
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
GCC currently requires fat object files for static libraries, since the
linker would otherwise not load the .o file from the archive at all and
the linking would fail with a lot of undefined references. Clang on
Linux also needs this, but it has no equivalent flag, so enabling LTCG
for Clang on static libraries will result in linker error.
This commit does not add support for enabling it in configure. It can be
enabled on a per-project basis by doing CONFIG += ltcg or by passing
-config ltcg to qmake's command-line.
Change-Id: I52cf99f1ed9f1701e23a3b457ba3502fd28126ce
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Move it from bootstrap.pro into qt_module.prf so it will apply to any
other bootstrapped libraries, like libQmlDevTools.
Variable called "SPLIT_SECTIONS" because -fdata-sections could be added
in the future, if it proves to be a benefit.
Change-Id: I3fbb004f111620a84e58e9112e9bce3afd95631e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
The index is only helpful if the version of GDB to
create it uses the same version as the GDB version
that consumes it. Outside the "local development"
scenario this happens only by conincidence, still
we add ~3.6% to the debug library size and face
maintenance issues like QTBUG-34950.
We also don't see the same performance benefit anymore
with recent versions as we did when the feature was
added, so it's best to not create the index anymore.
People who need it, still can add it manually, or
by the 'gdb-add-index' tool that comes with recent
versions of GDB, or trust their distributors to
set up indexes matching their runtime environment.
Task-number: QTBUG-34950
Change-Id: Id4c79fa51fea9622b0891bd9b9b395b948ecb157
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
There's a bug found in ICC 14.0 that causes the compiler to assert when
compiling QtDeclarative. Let's leave this here until at least one year
after the fix is released.
Intel task: DPD200253124
Task-number: QTBUG-36577
Change-Id: I76d4b41da7e60397dac65862a3a6ec024b840744
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
This commit will make qmake use -isystem automatically for any
compilers that declare support for it for any paths that are listed in
QMAKE_DEFAULT_INCDIRS.
Change-Id: I36fefc6d5bba61671f65669f0ea42704b3c3cf31
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
I had the -fPIE option in my personalised "linux-icc-optimised" spec,
so I never noticed it was missing in the standard one.
I have no idea when -rpath-link is necessary. It isn't for me.
Task-number: QTBUG-34425
Change-Id: I54b2fb8cda10b9197d81b5630b1d29b8c338d96a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Warnings 654 and 411 appear to have disappeared by ICC 14.
Change-Id: Ic200f239a4a4377015d13b2f4ae85595ce864ace
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
We'll use nm to get the listing of symbols in the next commit.
The -P option is "portable", which sounds like a good idea. I don't
have access to any of the commercial Unix systems, but I do remember
them printing a different format than GNU binutils's nm.
Change-Id: If6f80624bedaf2b1dabf608e16aa097d9910d739
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Replace all tabs with proper space characters and consistently align
the '=' characters. The default alignment for the '=' of 25 characters
has been left as is to get a minimal diff. Lines with the '=' further
to the right and those belonging to 'proper code (TM)' have not been
touched.
The work was mostly done using the following python script (might
come in handy again...):
import sys, re
indent_eq = 25 + 0*4 # 25 characters was the most widely used indentation for the '=' character
p = re.compile(r'(\w+)[ \t]*([\-\+]?)(=$|= )[ \t]*(.*$)')
for fn in sys.argv[1:]:
with open(fn, 'r+') as f:
lines = []
nl_count = 0
continuity_indent = None
for l in f:
m = p.match(l)
nl = l
if m:
n_spaces = max(m.start(3), indent_eq - 1) - len(m.group(2)) - len(m.group(1))
if m.group(2) and m.start(2) >= indent_eq-1 and m.start(2) % 4 == 0:
n_spaces -= 1 # left-shift '+=' by one if the '+' is aligned to a multiple of 4
n_spaces = max(1, n_spaces) # we want at least one space before '='/'+='
nl = m.group(1) + ' '*n_spaces + ''.join(m.group(2,3,4)) + '\n'
continuity_indent = nl.find('= ') + 2 if l[-2] == '\\' else None # remember indent on '\\$'
elif continuity_indent:
nl = ' '*continuity_indent + l.lstrip()
if l[-2] != '\\': # check when to stop the continuation
continuity_indent = None
elif l.startswith('#'):
nl = l.expandtabs(2)
if l != nl:
nl_count += 1
lines.append(nl)
if nl_count > 0:
print fn, nl_count, len(lines)
f.seek(0)
f.writelines(lines)
f.truncate()
Change-Id: I1d2870d0a2fe2e30d398c140fe523e69dd20c81b
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Remove all trailing whitespace from the following list of files:
*.cpp *.h *.conf *.qdoc *.pro *.pri *.mm *.rc *.pl *.qps *.xpm *.txt *README
excluding 3rdparty, test-data and auto generated code.
Note A): the only non 3rdparty c++-files that still
have trailing whitespace after this change are:
* src/corelib/codecs/cp949codetbl_p.h
* src/corelib/codecs/qjpunicode.cpp
* src/corelib/codecs/qbig5codec.cpp
* src/corelib/xml/qxmlstream_p.h
* src/tools/qdoc/qmlparser/qqmljsgrammar.cpp
* src/tools/uic/ui4.cpp
* tests/auto/other/qtokenautomaton/tokenizers/*
* tests/benchmarks/corelib/tools/qstring/data.cpp
* util/lexgen/tokenizer.cpp
Note B): in about 30 files some overlapping 'leading tab' and
'TAB character in non-leading whitespace' issues have been fixed
to make the sanity bot happy. Plus some general ws-fixes here
and there as asked for during review.
Change-Id: Ia713113c34d82442d6ce4d93d8b1cf545075d11d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
it differed from QMAKE_LIBS_OPENGL only for the irix/sco/unixware -cc
specs for not entirely obvious reasons. as all these specs are obsolete,
remove it.
Change-Id: I7d50ffa11ff830371ea52c9ebe25e1f1bc56b307
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This option was necessary in early ICC 12 releases because of a
difference in interpreting the ABI requirements with GCC. According to
ICC devs, GCC changed the ABI on its own to require 16-byte-aligned
stacks on i386.
It looks like this option has been the default in later ICC 12
releases. At least 12.1 update 5 has it by default. ICC 13 does not
have the option anymore but accepts it silently for backwards
compatibility.
Change-Id: Id8bb4c250718eef2f02dc97bd47a0efd95b272fc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Change copyrights and license headers from Nokia to Digia
Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
on the way to eliminate scoping based on the spec.
gcc and msvc go as such into CONFIG, the other ones get the vendor
prefixed, as most are mostly unknown and thus likely to clash with
users' flags.
Change-Id: Ie622f53d90e96dbf05ce7d8c638cd355f04fa20c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
"CONFIG += qt warn_on release link_prl" is in every single spec (though
for link_prl there is one genuine exception and two apparent omissions).
Change-Id: I72e1e315586af828eefa3b0b70998ab892ec3c1a
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
there is no reason whatsoever to duplicate this so many times, and even
less reason to have specs with a deviating default.
Change-Id: Ia25836c079580adebc373697b8bd03598f79c69b
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
not strictly necessary, but nicer.
QMAKE_PLATFORM (and thus CONFIG) now also contains the name of the OS, and
its family (if applicable, e.g., bsd). this also adds more feature search
paths.
Change-Id: I3ab971e6e3b2b32cae53b95e4bc67a86688bc5cb
Reviewed-by: Qt Doc Bot <qt_docbot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
there are only two types. everything else is duplication.
Change-Id: I87f2bdd3d56b94bb2ecdb60e8861afeb9af3666f
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
they are equivalent to QT_INSTALL_(HEADERS|LIBS)/get.
Change-Id: Ic4b47f3ca7db55785b96f19020a2fa020a8d25bd
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
This allows us to have different flags for the compilers for
supporting the same feature. For example, the official flag in GCC to
support AVX2 is -mavx2, but ICC does not support it (yet), requiring
-march=core-avx2 or -xCORE-AVX2. That flag, instead, enables support
for all the features that the "Core-AVX2" processor (codename Haswell)
will support. And clearly, the MSVC flags are different.
Change-Id: I33b6d8617520925e807747180a8dbaafd79b7a9a
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Enabling support for C++11 adds CONFIG+=c++11 to the Qt build. Projects
using Qt can check for C++11 support using contains(QT_CONFIG, c++11) in
their .pr[iof] files.
The QMAKE_CXXFLAGS_CXX11 and QMAKE_LFLAGS_CXX11 qmake varibles contain
any arguments the compiler needs to enable C++11. CONFIG+=c++11 adds
these arguments to the build.
Support for clang, g++, and the Intel C++ Compiler for Linux are
included in this commit.
Change-Id: Id77f86d7ad4d5c740b890446a40b105879a0d327
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
There is no session management currently implemented for the xcb QPA
backend. Update the build system to reflect this.
Change-Id: I3486de5741f1fb7e09330ca142b8235a84d3b91d
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
The warning is presented now that we use __assume in every
Q_ASSERT. It presents itself in code that calls functions, like:
tools/qbitarray.h(128): warning #2261: __assume expression with side effects discarded
{ Q_ASSERT(i >= 0 && i < size());
^
Change-Id: I5851b3c35b56c00b9c541c2489233121ef621e04
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Include linux.conf instead of unix.conf, so it can compile Qt Base
these days (otherwise, we get an error from wayland-scanner.prf).
Remove the outdated information from the header. The mkspec now
matches ICC 12, not 10 and there are more diagnostics we disable.
Change-Id: Ic75593759a4d53f859a9a9e919d77b5c52d01024
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
there is entirely no point in having it there.
Change-Id: Ie2fc1e94495119725131cbd50564648cbb4a7dc8
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
Reviewed-by: Marius Storm-Olsen <marius.storm-olsen@nokia.com>
It was causing issues when cross-compiling with a sysroot, as the paths
were not prefixed with the sysroot. The right include paths should be
taken care of by pkgconfig anyways.
Change-Id: I2cf7bf6377c88e6bf3b015100444d082530337ec
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
