The -mno-direct-extern-access tells the compiler and linker that
references to symbols outside this ELF module mustn't be direct and must
instead always go through the GOT or PLT (the PLT can additionally be
disabled with -fno-plt). The ELF protected visibility tells the compiler
and linker that this symbol is present in the dynamic symbol table as an
export, but it cannot be interposed by another ELF module.
This option is required for user code to link properly to Qt, otherwise
they will get linker errors (assuming GNU binutils >= 2.39) or runtime
failures (glibc >= 2.35). Both versions of glibc and binutils are older
than GCC 12, so it's a safe assumption they are in use and downgrading
the toolchain or libc is not supported. Adding this option to the
compilation is assured for CMake and qmake-based projects.
For example, all accessess to QCoreApplication::self in QtCore, after
this change and with GCC 12 are relocation-free and direct:
000000000013ebf0 <QCoreApplicationPrivate::checkInstance(char const*)>:
13ebf0: cmpq $0x0,0x4f73d0(%rip) # 635fc8 <QCoreApplication::self>
13ebf8: setne %al
13ebfb: je a90fe <QCoreApplicationPrivate::checkInstance(char const*) [clone .cold]>
13ec01: ret
Meanwhile, accesses to the same variable in other modules are indirect
via the GOT:
66650: mov 0x876e1(%rip),%rax # edd38 <QCoreApplication::self@Qt_6>
66657: cmpq $0x0,(%rax)
This replaces the -Bsymbolic and -Bsymbolic-functions (broken)
functionality that Qt has been using or attempting to use since ~2006.
See https://gitlab.com/x86-psABIs/x86-64-ABI/-/issues/8#note_606975128
Change-Id: Iad4b0a3e5c06570b9f5f571b26ed564aa0811e47
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Change-Id: Ib22d2fdca6a4819c1b4056e3207940ceebfbe365
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Enabled via configure --ccache, or CONFIG += ccache in 3rd party
projects.
Ensures that we use the right sloppiness and other ccache options
during compilation.
Task-number: QTBUG-31034
Change-Id: I696b3d3f0398873a29b93d1bc2b4d4e06ef23dc9
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
The script will look for the most recent Qt Creator version on the system,
and pick up the LLDB summary providers from there, allowing pretty-printing
of Qt types inside LLDB/Xcode.
LLDB will detect the file when loading the dSYM, and inform the user that
the file can be loaded to enable the formatters. The script can be loaded
automatically by adding the following setting in ~/.lldbinit:
settings set target.load-script-from-symbol-file true
Which comes as a slight security risk, as other libraries might have
scripts of their own. The alternative is to load the script directly
from ~/.lldbinit:
command script import "<path to debug script in dSYM>"
With an optional target.load-script-from-symbol-file set to false, to
silence the warning when loading the dSYM bundle.
Change-Id: I01ba51dab725a8d0a58f1ad1749742443b639cc5
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
This commit re-enables support for OpenVG in Qt, but not in the
same way as in Qt 4.8. The first part is about adding a test
and using the new configure system to enable OpenVG.
There is still support code in Qt for setting up EGL to provide a
surface and context for rendering with the OpenVG API, this commit
enables a path to do so.
Normally to get access to an EGLContext from a QWindow you do so via
QOpenGLContext, but in setups without OpenGL but with EGL and OpenVG
this doesn't make sense (there would be no QOpenGLContext). So the
intended way is to use a QWindow to get an EGLSurface, then create
an EGLContext directly (without going through QPA).
Change-Id: I0f75aadbaa3cd006deb7e6fd12cfbb574870fba4
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Use the new qtConfig macro in all pro/pri files.
This required adding some feature entries, and adding
{private,public}Feature to every referenced already existing entry.
Change-Id: I164214dad1154df6ad84e86d99ed14994ef97cf4
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
This follows up ab599a3931, which did not
take installation into account.
Task-number: QTBUG-54036
Change-Id: Ic1b3acb8984255dd1ca1c288b7b150814ce9e606
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
This makes the -separate-debug-info configure optional functional, which
generates dSYM debug info bundles for Qt libraries on Apple platforms.
Task-number: QTBUG-37952
Done-with: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Change-Id: Ia247674740bf450130a15db926df07fa9007e2ca
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
it doesn't appear to be referenced in any way, either.
Change-Id: Ifd30b435e3e628cd5e48ae24e9aef01c662d6d61
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Instead of lumping both Objective-C (.m) and Objective-C++ (.mm) sources
into the same pile, passing them on to the same compiler as for C++ (CXX),
with the C++ flags (CXXFLAGS), we follow Apple's lead and treat them as
variants of the C and C++ languages separately, so that Objective-C
sources are built with CC and with CFLAGS, and Objective-C++ sources
with CXX, and CXXFLAGS.
This lets us remove a lot of duplicated flags and definitions from the
QMAKE_OBJECTIVE_CFLAGS variable, which in 99% of the cases just matched
the C++ equivalent. The remaining Objective-C/C++ flags are added to
CFLAGS/CXXFLAGS, as the compiler will just ignore them when running in
C/C++ mode. This matches Xcode, which also doesn't have a separate build
setting for Objective-C/C++ flags.
The Makefile qmake generator has been rewritten to support Objective-C/C++
fully, by not assuming that we're just iterating over the C and C++
extensions when dealing with compilation rules, precompiled headers, etc.
There's some duplicated logic in this code, as inherent by qmake's already
duplicated code paths, but this can be cleaned up when C++11 support is
mandatory and we can use lambda functions.
Task-number: QTBUG-36575
Change-Id: I4f06576d5f49e939333a2e03d965da54119e5e31
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
To make echo hide all the commands of making the debug file it needs
to use && to separate commands instead of newline.
Change-Id: I6c9b408b897a285b769a402fa4d923c110334504
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Since quoting was fixed, separate debug info has no longer installed
correctly because it relied on executing shell commands in the target
name.
This cleans up the generation and installation of separate debug info
by using resolve_target.prf.
Change-Id: I3ee47c0e4dc3de600c42f56b17315a69925c4724
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
clearly, this was a poor man's implementation of -force-debug-info.
Change-Id: Ib5c7e390bd0e3a6912af8c4027074a114ed33f8a
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.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>
it's wasteful, given that exactly one add-on module (and most probably
nobody else) needs it.
i'd do the same with yacc and lex, but i suspect this would cause quite
an uproar.
Change-Id: Ic2a6ca19e829393835f824e31cd0893e78c3fd39
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
sed versions other than the GNU one often default to being POSIX-compliant,
in which case "+" (with and without escaping) is always an ordinary
character.
Achieve the same functionality in a way that works with both GNU and BSD
seds by using "xx*" insted of "x\+".
Change-Id: I1d2576a8c0e17b31f01a44d9632c57991e53780d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
all tests that happen after default_post loads resolve_config can rely
on debug vs. release, static vs. shared, and staticlib vs. dll being
properly "de-conflicted".
Change-Id: Ie0b4defcd6024bd1c25f53ba7e03621052d96492
Reviewed-by: Joerg Bornemann <joerg.bornemann@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>
the check whether we are building a lib or an app (and thus have a target)
is done by quite some feature files (and generally wrongly, as they do not
account for the new aux target), so centralize it in default_post.prf.
Change-Id: I868edbc4185be8a6c23ecd4a2c126024d73cdeb4
Reviewed-by: Joerg Bornemann <joerg.bornemann@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>
Handle the case of an empty DESTDIR.
(cherry picked from commit 122fa6b53c33364a4687919191e55899acb43797)
Change-Id: I0c2eec5736d0944b8ee97abdfa3f1121e7d8db4b
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Unlike for libraries, $(TARGET) already contains $(DESTDIR).
Changing to $(DESTDIR) does break the command in that case.
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
(cherry picked from commit 7eb770aed35fee50ff98c12e390dcb02c72b5132)
Change-Id: Idd0f30d52db432062917a1c956c3af73e6c8a6a4
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:
http://qt.gitorious.org/qt/pages/GitIntroductionWithQt
If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.
Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12
