error: cannot find -lc++ qt 5.12 android

Albertino

The error: cannot find -lc++ using ndk r20 can be solved like this:
https://codereview.qt-project.org/c/qt/qtbase/+/264903/9/mkspecs/android-clang/qmake.conf#34

For example to compile for android armv7 ndk r20, locate the file:
C:\Qt\5.13.0\android_armv7\mkspecs\android-clang\qmake.conf
and add the missing -nostdlib++
for android x86 (i use this for emulator), locate the file:
C:\Qt\5.13.0\android_x86\mkspecs\android-clang\qmake.conf

BeMind

@Albertino solution Works!!! :) Thank you.

alepez

@Albertino solution works for me (Qt 5.12.3)

ignusin

@Albertino thank you Sir, you just saved my day (night to be honest).

rch_shukla

@Albertino @AriosJentu Hello , I am getting while deploying 5.10 project into QT 5.13. It is perfectly deploying for windows but for android unable to deploy i have already tried all available solutions but nothing is working out for me.
This is my error-
clang++.exe: error: no such file or directory: 'c:\Utils\Android\android-ndk-r19c/sources/cxx-stl/llvm-libc++/libs/arm64-v8a/libc++.so.21'
make: *** [libMNSBLauncher.so] Error 1
12:26:15: The process "C:\Android\android-ndk-r19c\prebuilt\windows-x86_64\bin\make.exe" exited with code 2.
Error while building/deploying project mobilauncher (kit: Android for arm64-v8a (Clang Qt 5.13.0 for Android ARM64-v8a))
When executing step "Make" 😢

mzelina

@Albertino thank you!

trousev

You also can write this into your own qmake file, not into system one. To be precise, just add into your project's .pro the following:

QMAKE_LINK += -nostdlib++

and that's it

Albertino

This post is deleted!

Albertino

@trousev said in error: cannot find -lc++ qt 5.12 android:

QMAKE_LINK += -nostdlib++

Oh nice to know, thanks

deleted510

@albertino THANK YOU! WOOORKS!!!!

RickF

@trousev What's the underlying problem this solves? It works for me but why? Thx.

bogong

@albertino said in error: cannot find -lc++ qt 5.12 android:

https://codereview.qt-project.org/c/qt/qtbase/+/264903/9/mkspecs/android-clang/qmake.conf#34

Solution works on 5.12.4

DonLakeFlyer

@rickf I'd like to know the same thing. Is this just a workaround or the correct setup?

BTSTOnline

@trousev said in error: cannot find -lc++ qt 5.12 android:

You also can write this into your own qmake file, not into system one. To be precise, just add into your project's .pro the following:
QMAKE_LINK += -nostdlib++
and that's it

Worked for me!

Markus Goetz53

FYI If this is https://bugreports.qt.io/browse/QTBUG-70631, it's claimed to be fixed with 5.12.5 and 5.13.0

Gourmet

Just installed Qt 5.12.5 and checked - this option is already in qmake.config files for all android branches.

Topic starter can change this topic to SOLVED.

Swapnil Ashok Desai

@Albertino thanks it worked

liudongya

@AriosJentu I had the same problem, how did you solve it