[Bug]: Zeal can't run after the first launch.

[DuilioPerez]

I've installed Zeal today. I built it from source for Android (Termux) using Qt5. But after the first launch and close of the application, it can't run again. Here is a screenshot:

Some additional information:

• Android:

         -o          o-
          +hydNNNNdyh+
        +mMMMMMMMMMMMMm+
      `dMMm:NMMMMMMN:mMMd`
      hMMMMMMMMMMMMMMMMMMh
  ..  yyyyyyyyyyyyyyyyyyyy  ..
.mMMm`MMMMMMMMMMMMMMMMMMMM`mMMm.
:MMMM-MMMMMMMMMMMMMMMMMMMM-MMMM:   u0_a289@localhost
:MMMM-MMMMMMMMMMMMMMMMMMMM-MMMM:   -----------------
:MMMM-MMMMMMMMMMMMMMMMMMMM-MMMM:   OS: Android 11 aarch64
:MMMM-MMMMMMMMMMMMMMMMMMMM-MMMM:   Host: samsung SM-A225M
-MMMM-MMMMMMMMMMMMMMMMMMMM-MMMM-   Kernel: 4.14.186-22735277
 +yy+ MMMMMMMMMMMMMMMMMMMM +yy+    Uptime: 13 hours, 26 mins
      mMMMMMMMMMMMMMMMMMMm         Packages: 682 (dpkg), 1 (pkg)
      `/++MMMMh++hMMMM++/`         Shell: bash 5.2.32
          MMMMo  oMMMM             CPU: MT6769V/CT (8) @ 1.800GHz
          MMMMo  oMMMM             Memory: 2964MiB / 3714MiB
          oNMm-  -mMNs

• Termux:

Termux Variables:
TERMUX_API_VERSION=0.50.1
TERMUX_APK_RELEASE=F_DROID
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=19781
TERMUX_IS_DEBUGGABLE_BUILD=0
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.0
TERMUX__USER_ID=0
Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://packages-cf.termux.dev/apt/termux-main/ stable main
# glibc-repo (sources.list.d/glibc.list)
deb https://packages-cf.termux.dev/apt/termux-glibc/ glibc stable
# tur-repo (sources.list.d/tur.list)
deb https://tur.kcubeterm.com tur-packages tur tur-on-device tur-continuous
# x11-repo (sources.list.d/x11.list)
deb https://packages-cf.termux.dev/apt/termux-x11/ x11 main
Updatable packages:
All packages up to date
termux-tools version:
1.43.5
Android version:
11
Kernel build information:
Linux localhost 4.14.186-22735277 #1 SMP PREEMPT Sat Feb 19 02:14:57 KST 2022 aarch64 Android
Device manufacturer:
samsung
Device model:
SM-A225M
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec.so
Installed termux plugins:
com.termux.api versionCode:51
com.termux.x11 versionCode:15
com.termux.styling versionCode:32

[DuilioPerez]

I've read the application's code (I just know a little bit about Qt) and the problems seems to be with the secondary instance. Even if I close the applicattion and open it again, it is saw as secondary instance by the code, and there it is the issue.

[trollixx]

Interesting. Probably on Android Zeal doesn't clean up the local socket used to ensure that only one instance is running. It's probably unnecessary as OS should not allow multiple instances anyway.

[DuilioPerez]

It's seems it is a qt compilation limitation in that platform. I've send a package request to Termux repository, you can see it here.

[DuilioPerez]

Another important thing to know is that Termux is like a reduced Linux distribution. It have its limitation because it is based on bionic (Android C/C++ libraries) instead of libgc (GNU C/C++ libraries). But it should work. For some reason, detects as a secondary instance when it is a primary instance.