未定义的引用EVP_sha1，HMAC，Id返回1退出状态

Question

i´ve got a problem with the Error above. In m Code is the HMAC implemented. i tried solving the problem with this link: Here

But it just doesnt work so i hope you can help me. im really stuck with this and played with the QMAKE_CXXFLAGS but just got no positiv solution.

here is the .pro:

QT       += core gui webkit network

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = csui
TEMPLATE = app




#QMAKE_CFLAGS_RELEASE += -lssl -lcrypto
#QMAKE_CFLAGS_RELEASE += -lcrypto



target.path = /home/msw

INSTALLS += target

SOURCES += main.cpp\
    mainwindow.cpp \
    qcolpushbutton.cpp \
    librfid/mifare.cpp \
    librfid/list.cpp \
    librfid/brp.cpp \
    qrfid.cpp \
    qscaledlabel.cpp \
    statelogic.cpp \
    qcsnp.cpp \
    qchargepoint.cpp \
    qi2cnode.cpp \
    libhotp-tan.cpp

HEADERS  += mainwindow.h \
    qcolpushbutton.h \
    debug.h \
    config.h \
    librfid/mifare.h \
    librfid/list.h \
    librfid/brp.h \
    qrfid.h \
    qscaledlabel.h \
    statelogic.h \
    qcsnp.h \
    qchargepoint.h \
    qi2cnode.h \
    libhotp-tan.h

FORMS    += mainwindow.ui

RESOURCES += \
    res/res.qrc

and the links from the Makefile

CFLAGS        = -pipe -isystem /home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/include -isystem /home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/include -O2 -Wall -W -D_REENTRANT $(DEFINES)
CXXFLAGS      = -pipe -isystem /home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/include -isystem /home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/include -O2 -Wall -W -D_REENTRANT $(DEFINES)

 13:45:58: Führe Schritte für Projekt csui aus... 13:45:59: Starte "/opt/qt-4.8.3e-armhf/sysroot-cross/bin/qmake" '/home/msw/Arbeitsfläche/Experimentelles Programm/csui.pro' -r -spec /opt/qt-4.8.3e-armhf/sysroot-target/usr/mkspecs/qws/linux-ptx-g++ 13:45:59: Der Prozess "/opt/qt-4.8.3e-armhf/sysroot-cross/bin/qmake" wurde normal beendet. 13:45:59: Starte "/usr/bin/make" -w make: Entering directory `/home/msw/Arbeitsfläche/Experimentelles Programm' arm-1136jfs-linux-gnueabihf-g++ -L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib -L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib -Wl,-rpath-link -Wl,/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib -Wl,-rpath-link -Wl,/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib -Wl,-O1 -o csui main.o mainwindow.o qcolpushbutton.o mifare.o list.o brp.o qrfid.o qscaledlabel.o statelogic.o qcsnp.o qchargepoint.o qi2cnode.o libhotp-tan.o moc_mainwindow.o moc_qcolpushbutton.o moc_qrfid.o moc_qscaledlabel.o moc_statelogic.o moc_qcsnp.o moc_qchargepoint.o moc_qi2cnode.o qrc_res.o -L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib -L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib -lQtWebKit -lQtGui -L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib -L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib -lQtNetwork -lQtCore -lpthread make: Leaving directory `/home/msw/Arbeitsfläche/Experimentelles Programm' libhotp-tan.o: In function `hotpa(unsigned char const*, unsigned char const*, char*, unsigned int, unsigned char const*, unsigned int)': libhotp-tan.cpp:(.text+0x74): undefined reference to `EVP_sha1' libhotp-tan.cpp:(.text+0xb4): undefined reference to `HMAC' collect2: error: ld returned 1 exit status make: *** [csui] Error 1 13:46:01: Der Prozess "/usr/bin/make" wurde mit dem Rückgabewert 2 beendet. Fehler beim Erstellen/Deployment des Projekts csui(Ziel: Embedded Linux) Bei der Ausführung von Schritt 'Make' 

THANKS!!

Answer 1

Your linkage command is:

arm-1136jfs-linux-gnueabihf-g++ \ 
-L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib \ 
-L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib \ 
-Wl,-rpath-link \
-Wl,/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib \ 
-Wl,-rpath-link \
-Wl,/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib \ 
-Wl,-O1 \
-o csui main.o mainwindow.o qcolpushbutton.o mifare.o list.o brp.o qrfid.o \
qscaledlabel.o statelogic.o qcsnp.o qchargepoint.o qi2cnode.o libhotp-tan.o \ 
moc_mainwindow.o moc_qcolpushbutton.o moc_qrfid.o moc_qscaledlabel.o moc_statelogic.o \
moc_qcsnp.o moc_qchargepoint.o moc_qi2cnode.o qrc_res.o \    
-L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib \
-L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib \ 
-lQtWebKit \
-lQtGui \
-L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/usr/lib \
-L/home/msw/crossdev/OSELAS.BSP-RaspberryPi/platform-RaspberryPi/sysroot-target/lib \
-lQtNetwork \
-lQtCore \
-lpthread

(There's a lot of redundant repetition there)

The undefined symbols EVP_sha1 and HMAC are defined in libcrypto , for which you need also to link libssl , but -lssl -lcrypto are not among the library options you are passing to the linker. You need to add them.

I'm not familiar with QMake but I believe library options should be defined in LIBS If you generate a linker commandline with -lssl -lcrypto following -lQtCore you should be all right.

I notice that -lssl -lcrypto appears in the commented-out setting:

#QMAKE_CFLAGS_RELEASE += -lssl -lcrypto

That wouldn't have worked, since it's setting options for the C Compiler in release mode, not the linker. Likewise QMAKE_CXXFLAGS , which you say you tinkered with, sets options for the C++ compiler, not the linker.