Why Qt creator say "use of undeclared identifier 'QSslSocket'", but it exists.
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@senmx OK, then this comes from code model (clang) - it often reports false positive for what ever reason. If you do not want to use it disable the plug-in ClangCodeModel in Help/About Plugins...
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error: use of undeclared identifier 'QSslSocket'
code:
#include <QGuiApplication> #include <QQmlApplicationEngine> #include <QSslSocket> int main(int argc, char *argv[]) { qDebug() << "Device supports OpenSSL: " << QSslSocket::supportsSsl(); QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); QGuiApplication app(argc, argv); QQmlApplicationEngine engine; const QUrl url(QStringLiteral("qrc:/main.qml")); QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &app, [url](QObject *obj, const QUrl &objUrl) { if (!obj && url == objUrl) QCoreApplication::exit(-1); }, Qt::QueuedConnection); engine.load(url); return app.exec(); }I tried:
1. check in /usr/local/Qt-5.15.1-android/include
[sen@x include]$ find . -type f -name "qsslsocket.h" ./QtNetwork/qsslsocket.h2. No problem in the old version(Qt 5.13.2)
QT += quick QT += network CONFIG += c++11 ...@senmx as a side note, if that's the whole code of your "main.cpp", the
#include <QSslSockect>statement seems superfluous given there are no references to such class later in the code. -
@senmx as a side note, if that's the whole code of your "main.cpp", the
#include <QSslSockect>statement seems superfluous given there are no references to such class later in the code. -
Hi,
Since you build Qt yourself, did you activate the OpenSSL option ?
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@SGaist What option activate and how?
This is my compile shell:#!/bin/bash #https://doc.qt.io/qt-5/android-building.html cd /home/sen/soft/qt-everywhere-src-5.15.1 ./configure -xplatform android-clang -prefix /usr/local/Qt-5.15.1-android --disable-rpath -nomake tests -nomake examples -android-ndk $ANDROID_NDK_HOME -android-sdk $ANDROID_SDK_HOME -no-warnings-are-errors make -j12 make install -
You have the complete list of option if you call configure --help.
You should also check the configure summary to see what options/features are enabled.
And finally, if you want to build for Android with OpenSSL, you need an Android build of OpenSSL.
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./configure --help
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-no-openssl .......... Do not use OpenSSL [default on Apple and WinRT]
-openssl-linked ...... Use OpenSSL and link to libssl [no]
-openssl-runtime ..... Use OpenSSL and dynamically load libssl [auto]I have now turned on this option and recompile
1 #!/bin/bash 2 #https://doc.qt.io/qt-5/android-building.html 3 #https://doc.qt.io/qt-5/ssl.html 4 5 cd /home/sen/soft/qt-everywhere-src-5.15.1 6 make clean 7 OPENSSL_LIBS='-L/home/sen/github/c/openssl-1.1.1g -lssl -lcrypto' ./configure -xplatform android-clang -prefix /usr/local/Qt-5.15.1-android --disable-rpath -nomake tests -nomake examples -android-ndk $ANDROID_NDK_HOME -android-sdk $AND ROID_SDK_HOME -no-warnings-are-errors -openssl-linked 8 make -j12 9 make installon configure:
ERROR: Feature 'openssl-linked' was enabled, but the pre-condition '!features.securetransport && !features.schannel && libs.openssl' failed. -
./configure --help
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-no-openssl .......... Do not use OpenSSL [default on Apple and WinRT]
-openssl-linked ...... Use OpenSSL and link to libssl [no]
-openssl-runtime ..... Use OpenSSL and dynamically load libssl [auto]I have now turned on this option and recompile
1 #!/bin/bash 2 #https://doc.qt.io/qt-5/android-building.html 3 #https://doc.qt.io/qt-5/ssl.html 4 5 cd /home/sen/soft/qt-everywhere-src-5.15.1 6 make clean 7 OPENSSL_LIBS='-L/home/sen/github/c/openssl-1.1.1g -lssl -lcrypto' ./configure -xplatform android-clang -prefix /usr/local/Qt-5.15.1-android --disable-rpath -nomake tests -nomake examples -android-ndk $ANDROID_NDK_HOME -android-sdk $AND ROID_SDK_HOME -no-warnings-are-errors -openssl-linked 8 make -j12 9 make installon configure:
ERROR: Feature 'openssl-linked' was enabled, but the pre-condition '!features.securetransport && !features.schannel && libs.openssl' failed. -
@senmx Is /home/sen/github/c/openssl-1.1.1g the Android build?
Check the config.log file to see why exactly it failed. -
@senmx You did not answer my question.
Did you check the config.log by yourself first?
Because if you check it you see> main.cpp:2:10: fatal error: 'openssl/ssl.h' file not found > #include <openssl/ssl.h>So, it could not find SSL header.
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@jsulm
I saw it, but I didn’t understand it. The first thing I saw from top to bottom was:> main.cpp:7:8: error: Intel CET not available > # error Intel CET not available > ^ > 1 error generated. > make: *** [Makefile:191：main.o] 错误 1 test config.qtbase.tests.intelcet FAILEDAnyway, something is missing, I don’t know what is missing.
Could not find openssl/ssl.h,but:
[sen@x openssl]$ find /usr/include/openssl/ -type f -name "ssl.h" /usr/include/openssl/ssl.hI have compiled link library files in this directory:
/home/sen/github/c/openssl-1.1.1g libssl_1_1.so libcrypto_1_1.so -
How did you build OpenSSL for Android ?
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@SGaist
according to Qt doc:#!/bin/sh export HOST=linux-x86_64 export PATH="$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/$HOST/bin":$PATH cd /home/sen/github/c/openssl-1.1.1g ./Configure shared android-arm -D__ANDROID_API__=21 make -j12 SHLIB_VERSION_NUMBER= SHLIB_EXT=_1_1.so build_libs -
Then why are you mixing your system installation with your custom OpenSSL build.
By the way, your Intel CET is likely due to a line that starts with a #. My guess is that this is a comme but Python style rather than C/C++ style.
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Then why are you mixing your system installation with your custom OpenSSL build.
By the way, your Intel CET is likely due to a line that starts with a #. My guess is that this is a comme but Python style rather than C/C++ style.
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Can you provide the complete OpenSSL checks part ?
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@SGaist Do you mean "make check"? In order to check whether the two files libssl_1_1_1.so and libcrypto_1_1_1.so can be used? These two files can be correctly linked to the android project and using , should be no problem.
@senmx said in Why Qt creator say "use of undeclared identifier 'QSslSocket'", but it exists.:
Do you mean "make check"?
No, the SSL check in config.log which is:
loaded result for library config.qtbase_network.libraries.openssl Trying source 0 (type openssl) of library openssl ... + cd /home/sen/soft/qt-everywhere-src-5.15.1/config.tests/openssl && /home/sen/soft/qt-everywhere-src-5.15.1/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" -early "CONFIG += cross_compile" 'QMAKE_USE += openssl' 'QMAKE_LIBS_OPENSSL = -L/home/sen/github/c/openssl-1.1.1g -lssl -lcrypto' /home/sen/soft/qt-everywhere-src-5.15.1/config.tests/openssl + cd /home/sen/soft/qt-everywhere-src-5.15.1/config.tests/openssl && MAKEFLAGS= /usr/bin/make > /opt/android-sdk/ndk/21.1.6352462/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ -c -target aarch64-linux-android21 -fno-limit-debug-info -fPIC -fstack-protector-strong -DANDROID -O2 -fPIC -I. -I/home/sen/soft/qt-everywhere-src-5.15.1/qtbase/mkspecs/android-clang -o main.o main.cpp > main.cpp:2:10: fatal error: 'openssl/ssl.h' file not found > #include <openssl/ssl.h> > ^~~~~~~~~~~~~~~ > 1 error generated. -
From the looks of it, you did not provide the correct path to the where the includes are located.
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From the looks of it, you did not provide the correct path to the where the includes are located.
@SGaist Thanks, If this is the case, how to solve it? There are other header files that can't be found. The header file of openssl is under /usr/include.
OPENSSL_LIBS='-L/home/sen/github/c/openssl-1.1.1g -lssl -lcrypto' ./configure -xplatform android-clang -prefix /usr/local/Qt-5.15.1-android --disable-rpath -nomake tests -nomake examples -android-ndk $ANDROID_NDK_HOME -android-sdk $AND ROID_SDK_HOME -no-warnings-are-errors -openssl-linked
