I am now using Qt 5.4.1, the latest version of Qt. But just now I encounter some bug. I guess it's because I use the wrong compiler.
By many document's suggestion, we are supposed to use the mingw compiler for qt. But, no MingW detected in my computer is suited for the Qt 5.4.1. Only the Microsoft Visual C++ compiler 12.0 x86_amd64 is ok.
I have install two mingw in my computer(one of which is 4.8.1 I guess). But none of them are suited for the qt5.4.1. Not the gcc.exe in C:\MinGW\bin, nor the mingw32-gcc.exe and mingw32-gcc-4.8.1.exe in C:\MinGW\bin
Also, I try the gcc.exe and g++.exe in D:\GCC\gcc\bin, but it's also the same.
Why is that? Thank you.
Related
I am using Qt 5.15.2 on my Mac mini with M1 chip. This works fine (due to Rosetta). Below is the list of compilers Qt Creator found on this computer, and among them is the C++, x86 64bit that I use. No problem.
I would like to use the same settings on a (somewhat newer) Mac Book Pro (also with M1 chip). Below is the list of compilers Qt Creator finds on this computer, the x86 is now missing!
I do not know if I have a x86 compiler on the new M1-computer. I have installed Xcode and the command line tools for XCode 13.2.
Can I somewhere tell Qt Creator that the deployment target is x86?
Does /usr/bin/clang++ only compile for the ARM/M1-chip, or can it also produce and link to x86 code?
if not, how can I find out if there is an x86 compiler on my new M1-computer?
If the compiler is missing, how to install it?
Any help would be most appreciated!
A few tips that can help, I just setup a project using Qt 5.15.2 on a 2021 M1 Mac.
Note this will likely be different for Qt >= 6.
Can I somewhere tell Qt Creator that the deployment target is x86?
Yes, you can do this using specific argument in the build settings of your kit.
Add the QMAKE_APPLE_DEVICE_ARCHS="x86_64" additional argument to qmake.
Also, add an additional CMake option: -DCMAKE_OSX_ARCHITECTURES:STRING="x86_64"
ℹ️ Click Manage Kits.. in the projects view to open the preferences editor where you can update your CMake configuration.
Does /usr/bin/clang++ only compile for the ARM/M1-chip, or can it also produce and link to x86 code?
With rosetta installed (/usr/sbin/softwareupdate –install-rosetta –agree-to-license), and the configuration above, yes you can compile and link x86 binaries.
I just installed QT Creator with QT under Win10 to build an already existing project. (Under Ubuntu everything went fine running the Make file). I'm not an expert for QT therefore I'm not able to find out how to resolve the error:
C:\Qt\5.14.2\mingw73_64\include/QtCore/qfloat16.h:102:54: internal compiler error: in make_rtl_for_nonlocal_decl, at cp/decl.c:6590
Q_CORE_EXPORT static const quint32 mantissatable[];
My gcc version is 8.3.0 (x86_64-posix-seh, Built by strawberryperl.com project). Is there something missing or broken in the installation?
On windows, you generally need to have a Qt which was built with the same (or compatible, but that can be hard to verify) compiler and relevant build options, as what you are using to build your application.
I doubt you will find a pre-built Qt SDK for that version of gcc, so if you want to use it, you should build Qt from sources. It can be a bit tedious on Windows, there are a fewf prerequisites you have to get etc. I recommend you use the Qt online installer to install a MinGW version of Qt SDK, and matching version of MinGW (also offered by the Qt installer.
I just found out from qmake.stash, that the included script for creating the make file always referenced a false path for the gcc compiler. I therefore build i manually with the QT Creator and it worked as expected. So I guess the fault was due to different paths for gcc in the environmental variables.
Here is the bug, there is a link to the patch: https://github.com/msys2/MINGW-packages/issues/5006
Also you can just downgrade to mingw gcc 8.2.0
In my professional computer, I have minGW 4.5.2 installed. Eclipse CDT works perfectly with it.
But I want to test some C++11 features. So I copied my minGW 4.8.x folder from my personal PC.
My problem is that eclipse uses libraries from the old minGW (witch is the PATH).
I'd want to set eclipse up to use the new version of minGW.
I know how to change the g++ used for compiling/linking but not the include libraries.
Any idea ?
Thanks a lot.
PS : I can't change the PATH in my professional computer. I run Windows 7
You can try creating a batch file the following code, assuming the MinGW you want to use is in C:\MinGW :
set PATH=C:\MinGW\bin;%PATH%
start eclipse.exe
I would like to upgrade my old GCC compiler to v. 4.8.1.
Currently I'm using Code::Blocks IDE (nightly build, svn 8982), and my compiler is GCC 4.4.1.
I downloaded fresh GCC from their site - gcc.gnu.org
From what I've read in documentation, they say that I should first build compiler by myself. Afterwards, they throw something like this:
% mkdir objdir
% cd objdir
% srcdir/configure [options] [target]
However, I completly have no idea what to do with these lines.
And even if I did, afterwards come maaany lines with some additional options, where I am even more lost then before.
I don't know if there is any easy way of installing it, but from what I've read here, I can download MSYS from MinGW and it will do everything(I hope?) for me. However, from what I see there, it says that MinGW comes with already built version of GCC, meaning I won't be able to use mine anyway. Am I right? If yes, what should I do to build and use GCC? If not, then will I be able to easily install GCC after downloading MSYS?
Thanks in advance.
I can download MSYS from MinGW
YOu can.
and it will do everything(I hope?) for me.
It won't. MSys provides environment for building software that requires unix-like environment. To be more precise - autotools. If you aren't familiar with *nix build process (configure script), Mingw won't really help you.
However, from what I see there, it says that MinGW comes with already built version of GCC,
Yes, version 4.7.2 at the moment.
meaning I won't be able to use mine anyway. Am I right?
No. If you don't add Mingw/MSys to your PATH, you can keep multiple different installations on the same machine. It also SHOULD be possible to use multiple different versions of gcc within the same installation of mingw, but things can get messy here. (gcc3 and gcc4 should be able to exist, not sure about 4.7.2 and 4.8.1)
If yes, what should I do to build and use GCC?
You should search for precompiled binaries provided by somebody else. Compiling gcc yourself is possible, but for you (i.e. if you aren't arleady familiar with msys) it might not be worth the effort.
Either you could try http://mingw-w64.sourceforge.net/ or mingw-nuwen. Mingw provided by nuwen is 32bit only, but is very easy to install. The problem is that standard mingw distribution includes update tool (with "mingw uppdate" and "mingw upgrade" you can upgrade installed packages to their latest version), bug "mingw-nuwen" doesn't have such tool.
Because you say
However, I completly have no idea what to do with these lines.
You should either use precompiled mingw provded by somebody else, or use another compiler. If you don't really need bleeding-edge C++11 support ON WINDOWS, use visual studio express.
I used to have an older version of MinGW installed on my windows machine.
When I compiled my program under "Release" mode using the MinGW tool collection for build in NetBeans IDE, my executable was roughly 700KB.
Then, I recently installed the latest MinGW (mingw-get-inst-20120426.exe).
After the installation, I re-built my program and the executable is now 275KB and it doesn't seem to be reading the passed-in arguments correctly. The build is "BUILD SUCCESSFUL". It does have warnings for deprecation-related issues, but this existed before the new install.
I am really confused. Do you know what the problem is?
Thank you
Neo
WOW. It works now. I think removing C:\cygwin\bin from the PATH fixed the problem. Ahhh. Is that right? That's strange though because I specifically told NetBeans to use the MinGW toolset. Thanks for your help everyone.
in this case you did mix compilers. paths matter mate.