在QT5.12.1 ARM開發環境搭建 并 移植到RK3399 ubuntu16.04系統運行【完整版】_z54的博客-CSDN博客進行QT交叉編譯安裝ARM環境時出現了這個問題，主要提示錯誤如下：

Project?ERROR:?Cannot?run?compiler?'g++'. Maybe you forgot to setup the environment?

可以大概猜到是環境添加的問題，可是我已經添加過環境了啊：

# # qmake configuration for building with aarch64-linux-gnu-g++ #MAKEFILE_GENERATOR = UNIX CONFIG += incremental QMAKE_INCREMENTAL_STYLE = sublibQT_QPA_DEFAULT_PLATFORM = linuxfb QMAKE_CFLAGS_RELEASE += -O2 -march=armv8-a -lts QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv8-a -ltsinclude(../common/linux.conf) include(../common/gcc-base-unix.conf) include(../common/g++-unix.conf)# modifications to g++.conf QMAKE_CC = aarch64-linux-gnu-gcc QMAKE_CXX = aarch64-linux-gnu-g++ QMAKE_LINK = aarch64-linux-gnu-g++ QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++# modifications to linux.conf QMAKE_AR = aarch64-linux-gnu-ar cqs QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy QMAKE_NM = aarch64-linux-gnu-nm -P QMAKE_STRIP = aarch64-linux-gnu-strip load(qt_config)

后來打開了一個新終端，輸入aa之后按兩次Tab按鍵，輸出我有的一些架構，發現我根本沒有

aarch64-linux-gnu-gcc
aarch64-linux-gnu-g++

而我的是

aarch64-linux-gnu-gcc-5
aarch64-linux-gnu-g++-6

因此之后修改一下qtbase/mkspecs/linux-aarch64-gnu-g++/qmake.conf這個文件：

# # qmake configuration for building with aarch64-linux-gnu-g++ #MAKEFILE_GENERATOR = UNIX CONFIG += incremental QMAKE_INCREMENTAL_STYLE = sublibQT_QPA_DEFAULT_PLATFORM = linuxfb QMAKE_CFLAGS_RELEASE += -O2 -march=armv8-a -lts QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv8-a -ltsinclude(../common/linux.conf) include(../common/gcc-base-unix.conf) include(../common/g++-unix.conf)# modifications to g++.conf QMAKE_CC = aarch64-linux-gnu-gcc-5 QMAKE_CXX = aarch64-linux-gnu-g++-6 QMAKE_LINK = aarch64-linux-gnu-g++-6 QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++-6# modifications to linux.conf QMAKE_AR = aarch64-linux-gnu-ar-5 cqs QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy QMAKE_NM = aarch64-linux-gnu-nm -P QMAKE_STRIP = aarch64-linux-gnu-strip load(qt_config)

之后就qmake成功了。

總結

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