Solved Error when trying to set a breakpoint

[gfleck]

Hello,

I am having problems to set a breakpoint via Qt Creator debug mode on a remote target.

The debugger log output is:

dTAKING OWNERSHIP OF BREAKPOINT 21
>dRUNNING NEEDS-STOP COMMAND -break-insert  -f "\"main.cpp\":15"
> Stopping temporarily.
>dState changed from InferiorRunOk(8) to InferiorStopRequested(10)
> Stop requested...
>dTRYING TO INTERRUPT INFERIOR
>>~"\nThread "
>>~"1 \"app\" received signal SIGINT, Interrupt.\n"
>>~"0x00007ffff635604f in ?? ()\n"
>>*stopped,reason="signal-received",signal-name="SIGINT",signal-meaning="Interrupt",frame={addr="0x00007ffff635604f",func="??",args=[],arch="i386:x86-64"},thread-id="1",stopped-threads="all",core="1"
>dNOTE: INFERIOR STOP OK
> Stopped.
>dState changed from InferiorStopRequested(10) to InferiorStopOk(11)
> HANDLING QUEUED COMMANDS AFTER TEMPORARY STOP
><2026-break-insert  -f "\"main.cpp\":15"
>dNOTE: INFERIOR RUN REQUESTED
> Run requested...
>dState changed from InferiorStopOk(11) to InferiorRunRequested(7)
> Running requested...
><2027-exec-continue
>
>>&"p 0\n"
>>~"$2 = 0\n"
>>^done
>
>>&"No source file named main.cpp.\n"
>>2026^done,bkpt={number="2",type="breakpoint",disp="keep",enabled="y",addr="<PENDING>",pending="\"main.cpp\":15",times="0",original-location="\"main.cpp\":15"}
>
>>2027^running
>dNOTE: INFERIOR RUN OK
> Running.
>dState changed from InferiorRunRequested(7) to InferiorRunOk(8)
>>*running,thread-id="all"
>dNOTE: INFERIOR STILL RUNNING IN STATE InferiorRunOk.
>

It's strange because if I run a command by hand in debugger console a message appears and says that GDB is not responding.

Thanks.

[gfleck]

Found the cause, these two lines on my project .pro file cause this behavior.

QMAKE_CFLAGS_DEBUG = -Wno-cpp
QMAKE_CXXFLAGS_DEBUG = -Wno-cpp

I inserted these lines to suppress this warning on my environment:

/opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/features.h:397: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
In file included from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/c++/9.3.0/x86_64-poky-linux/bits/os_defines.h:39,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/c++/9.3.0/x86_64-poky-linux/bits/c++config.h:524,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/c++/9.3.0/type_traits:38,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/QtCore/qglobal.h:45,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/QtCore/qchar.h:43,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/QtCore/qstring.h:49,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/QtCore/qdatetime.h:44,
                 from /opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/QtCore/QDateTime:1,
                 from /home/gfleck/t-lite/ValidatorBV600/clockutil.cpp:29:
/opt/SBC-A44-pITX/sysroots/corei7-64-poky-linux/usr/include/features.h:397:4: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
  397 | #  warning _FORTIFY_SOURCE requires compiling with optimization (-O)
      |    ^~~~~~~

The official gdb documentation says:

-Wno-cpp

    (C, Objective-C, C++, Objective-C++ and Fortran only) Suppress warning messages emitted by #warning directives.

[gfleck]

It was my fault, the right .pro syntax is:

QMAKE_CFLAGS_DEBUG += -Wno-cpp
QMAKE_CXXFLAGS_DEBUG += -Wno-cpp

The precedent syntax removes the -g gcc option from Makefile.