QT编译遇到的初级问题整理 gnu-libstdc++\4.9\include\cstdlib:72: error: stdlib.h: No such file or directory

问题1 使用QT编译Android项目时总是提示头文件编译错误，类似下面

G:\androidsdk\android-ndk-r10d\sources\cxx-stl\gnu-libstdc++\4.9\include\cstdlib:72: error: stdlib.h: No such file or directory

#include <stdlib.h>

G:\androidsdk\android-ndk64-r10-windows-x86_64\android-ndk-r10\sources\cxx-stl\gnu-libstdc++\4.9\include/cwchar:44:19: fatal error: wchar.h: No such file or directory

#include <wchar.h>

^

compilation terminated.

makefile:1080: recipe for target 'xxx.obj' failed

解决方案： ^

来自一个国外网友的解决方案：

https://forum.qt.io/topic/43803/solved-qt-android-cstdlib-error-stdlib-h-no-such-file-or-directory

以下是解决答案：

Solved.

解决方案：It appeared I had a 64-bit NDK installed even though I thought I had downloaded a 32-bit NDK.

I blew away all NDK remnants and downloaded new 32-bit r10 NDK and now my Android x86 emulator is launching my Qt hello world app.

android-ndk32-r10-darwin-x86.tar.bz2

意思是要统一使用32位的NDK，QT Creator.

解决方案：我的解决方案也是这样，我的机器是64位，我NDK安装了64位，但是QTCreator是32位，这样就会有问题，把NDK重新下载一个32位的就OK了

问题2. -1: error: No rule to make target

'G:\androidsdk\android-ndk-r10d\sources\cxx-stl\gnu-libstdc++\4.9\include\utility', needed by 'main.obj'. Stop.

解决方案：删除就得编译配置目录，重新生成就ok了，这个问题是因为问题1的临时文件存在导致的编译错误，解决了问题1，删除工程编译文件重新编译就ok了。

问题3编译错误

Error: Target id 'android--1' is not valid. Use 'android.bat list targets' to get the target ids

Error while building/deploying project XXX(kit: Android for armeabi-v7a (GCC 4.9, Qt 5.4.1))

When executing step "Build Android APK"

-output D:/qt5/qml/qtquickbook/build-touchEvent-Android_for_armeabi_v7a_GCC_4_8_Qt_5_4_1-Release/android-build --deployment bundled --android-platform android--1 --jdk "D:/Program Files/Java/jdk1.7.0_45" --ant D:/qt5/apache-ant-1.9.4/bin/ant.bat

Error: Target id 'android--1' is not valid. Use 'android.bat list targets' to get the target ids.

Generating Android Package

Input file: D:/qt5/qml/qtquickbook/build-touchEvent-Android_for_armeabi_v7a_GCC_4_8_Qt_5_4_1-Release/android-libtouchEvent.so-deployment-settings.json

Output directory: D:/qt5/qml/qtquickbook/build-touchEvent-Android_for_armeabi_v7a_GCC_4_8_Qt_5_4_1-Release/android-build/

Application binary: D:/qt5/qml/qtquickbook/build-touchEvent-Android_for_armeabi_v7a_GCC_4_8_Qt_5_4_1-Release/libtouchEvent.so

Android build platform: android--1

Install to device: No

Buildfile: build.xml does not exist!

Build failed

Warning: Android platform 'android--1' does not exist in SDK.

Building the android package failed!

-- For more information, run this command with --verbose.

When executing step "Build Android APK"

Error while building/deploying project cube (kit: Android for armeabi-v7a (GCC 4.9, Qt 5.4.1))

When executing step "Deploy to Android device"

解决方案：需要设置Build Android APK 里面的 Android Build SDK-》Android -XX(选中目标版本)



^

问题4.编译静态库时需要出错， 提示nternal Error: Could not find .pro file.

Internal Error: Could not find .pro file.

20:37:40: Internal Error: Could not find .pro file.

Error while building/deploying project XXX(kit: Android for armeabi-v7a (GCC 4.9, Qt 5.4.1))

When executing step "Build Android APK"

解决方案：

unable to build lib

Right, I can reproduce that. Creator's android support is focussed around building applications and packaging them into apks. So building only a library (static or not, doesn't matter), is somewhat out of scope for us. To build a library for a application, we expect the user to create a subdirs project with both a library and a application project.

You can work around this problem, by disabling the unnecessary "make install" and "Build apk" steps on the Project's mode under the build settings.

解决方案：

禁用 Build Android APK 选项,就是下图中的蓝色圆饼+斜杠符号的禁用按钮。