https://bugs.kde.org/show_bug.cgi?id=502434
Bug ID: 502434
Summary: org.kde.Sdk: Probable missmatch in provided stdlibs
Classification: Developer tools
Product: Qt/KDE Flatpak Runtime
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: aleix...@kde.org
Reporter: allan4...@gmail.com
CC: aa...@kde.org
Target Milestone: ---
SUMMARY
I'm not really sure if here is the place to report it, but here I go :
Noticed when using QtCreator from Flatpak, it seems to depend on _org.kde.Sdk_
:
```sh
echo -e '#include <mutex> \n #include <thread> \n #include <memory> \n #include
<iostream> \n int main(){ auto i = std::make_unique<int>(42); std::cout << i
<< " " << *i << std::endl ; auto t = std::thread([]{}); t.join(); std::mutex m
= {}; return 0 ; }' |
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/*/*/files/bin/c++ -std=c++20
-isystem /var/lib/flatpak/runtime/org.kde.Sdk/x86_64/*/*/files/include -x c++ -
&& ./a.outIn file included from
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/6.8/2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f/files/include/c++/14.2.0/x86_64-unknown-linux-gnu/bits/gthr-default.h:35,
from
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/6.8/2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f/files/include/c++/14.2.0/x86_64-unknown-linux-gnu/bits/gthr.h:157,
from
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/6.8/2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f/files/include/c++/14.2.0/bits/std_mutex.h:41,
from
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/6.8/2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f/files/include/c++/14.2.0/mutex:47,
from <stdin>:1:
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/6.8/2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f/files/include/c++/14.2.0/bits/std_mutex.h:206:32:
error: cannot convert ‘<brace-enclosed initializer list>’ to ‘unsigned int’ in
initialization
206 | __gthread_cond_t _M_cond = __GTHREAD_COND_INIT;
| ^~~~~~~~~~~~~~~~~~~
/var/lib/flatpak/runtime/org.kde.Sdk/x86_64/6.8/2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f/files/include/c++/14.2.0/ext/concurrence.h:252:32:
error: cannot convert ‘<brace-enclosed initializer list>’ to ‘unsigned int’ in
initialization
252 | __gthread_cond_t _M_cond = __GTHREAD_COND_INIT;
| ^~~~~~~~~~~~~~~~~~~
```
- The error already contains a reproducible test.
- It completely breaks any Qt compilation.
- It pretty much seems to be a mismatch between a header and its library.
Probably `pthread.h` or `mutex.h`.
- Not confirmed yet, as I'd have to do lots of testings.
- And it took me some time debugging my entire application before
reaching this "simple" conclusion.
- And before doing it I'd like to know if it is already tracked.
- I can, but I'd like to hear about it first.
STEPS TO REPRODUCE
1. Flatpak install `org.kde.Sdk`.
- I probably got it as a dependency of `io.qt.QtCreator`, not sure since I
have lots of _snaps_ and _flatpaks_.
2. Copy and paste the one-liner in SUMMARY section.
- Valid tests with `-std=c++20` and `-std=c++23`
- Earlier standards wouldn't even compile, but for other reasons.
- `error: no type named ‘type’ in ‘struct std::enable_if<false, void>’`
OBSERVED RESULT
- Thread related operations can't be compiled due to mismatching type and
initialization **in standard libraries**.
- As described in summary, it pretty much seems to be a mismatch between
headers or header & library.
- After testing many times, it may also be something wrong with the
compiler itself, still need more digging into the problem.
EXPECTED RESULT
- That standard libraries should work when dealing with thread-related calls.
- **It compiles without a problem on system's GCC that is at the same exact
version (14.2.0)**
```sh
echo -e '#include <mutex> \n #include <thread> \n #include <memory> \n
#include <iostream> \n int main(){ auto i = std::make_unique<int>(42);
std::cout << i << " " << *i << std::endl ; auto t = std::thread([]{});
t.join(); std::mutex m = {}; return 0 ; }' | c++ -std=c++20 -x c++ - &&
./a.out
0x5642e09c42b0 42
```
SOFTWARE/OS VERSIONS
Flatpak @ Linux : Flatpak 1.16.0, Debian testing (trixie) 6.12.20-amd64
GCC inside flatpak : 14.2.0
GCC from system : (Debian 14.2.0-19) 14.2.0
Qt Version: **Flatpak** io.qt.QtCreator 16.0.0
eb00007daed9426ac86c57556aa171f9d6459b2b53e7d7eb352dcc73e9757a4f
KDE SDK Version : **Flatpak** org.kde.Sdk 6.8
2b27c8d886fd7c262f2cf1d4e216eadb5c141cba5a5673afd629b8ab1e5ecf7f
ADDITIONAL INFORMATION
- I've just created a container from scratch, and it occurs as described.
- `-isystem` is optional **for the test**, but required to compile Qt apps.
- The error will occur without it, but later for a Qt compilation it would
be required.
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