[Qt-interest] Problem perl into Qt Programme

[yogesh upreti]

Hello All,

I am trying to run some perl command in my Qt programme.
I made a test programme according to
http://perldoc.perl.org/perlembed.html#Adding-a-Perl-interpreter-to-your-C-program

in my .pro file I have

#-------------------------------------------------

#

# Project created by QtCreator 2011-04-27T23:08:23

#

#-------------------------------------------------

 QT       += core gui

 TARGET = testProcess

TEMPLATE = app

 SOURCES += main.cpp\

        testprocess.cpp

 HEADERS  += testprocess.h

 FORMS    += testprocess.ui

 INCLUDEPATH += C:/Perl/lib/CORE

 LIBS += -LC:/Perl/lib/CORE


Where C:\Perl is where I have my perl installed.

my .cpp file looks like:

#include "testprocess.h"

#include "ui_testprocess.h"

#include <perl.h>

#include <EXTERN.h>

 testProcess::testProcess(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::testProcess)

{

    ui->setupUi(this);

    char *lines[2] = {"printf \"My Name is\\n\";", "printf \"Yogesh Upreti\""};

    static PerlInterpreter *my_perl;

    my_perl = perl_alloc();

    perl_construct(my_perl);

    ui->output->insertPlainText("Start perl\n");

    int i = 0;

    i = perl_parse(my_perl,NULL,2,lines,(char**)NULL);

    perl_destruct(my_perl);

    perl_free(my_perl);

    PERL_SYS_TERM();

    ui->output->insertPlainText(QString("Perl output : %1\n").arg(i));

}

 testProcess::~testProcess()

{

    delete ui;

}


When i start writing this code, my QtCreator is identifying perl.h and
EXTERN.h. Also it gives me hint for all the functions (perl_alloc(),
per_parse() etc etc)

But when I run the program, I got following message.

Running build steps for project testProcess...

 Configuration unchanged, skipping qmake step.

Starting: "C:/QtSDK/mingw/bin/mingw32-make.exe" -w

mingw32-make: Entering directory
`D:/Work/Programming/QT/testProcess-build-desktop'

C:/QtSDK/mingw/bin/mingw32-make -f Makefile.Debug

mingw32-make[1]: Entering directory
`D:/Work/Programming/QT/testProcess-build-desktop'

g++ -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE
-DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB -DQT_CORE_LIB -DQT_HAVE_MMX
-DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2
-DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN
-I'c:/QtSDK/Desktop/Qt/4.7.2/mingw/include/QtCore'
-I'c:/QtSDK/Desktop/Qt/4.7.2/mingw/include/QtGui'
-I'c:/QtSDK/Desktop/Qt/4.7.2/mingw/include' -I'c:/Perl/lib/CORE'
-I'c:/QtSDK/Desktop/Qt/4.7.2/mingw/include/ActiveQt' -I'debug' -I'.'
-I'../testProcess' -I'.'
-I'c:/QtSDK/Desktop/Qt/4.7.2/mingw/mkspecs/win32-g++' -o debug/testprocess.o
../testProcess/testprocess.cpp

In file included from c:/Perl/lib/CORE/perl.h:38,

from ../testProcess/testprocess.cpp:3:

c:/Perl/lib/CORE/config.h:39:20: warning: "/*" within comment

.....

../testProcess/testprocess.cpp: In constructor
'testProcess::testProcess(QWidget*)':

../testProcess/testprocess.cpp:11: warning: deprecated conversion from
string constant to 'char*'

../testProcess/testprocess.cpp:11: warning: deprecated conversion from
string constant to 'char*'

g++ -enable-stdcall-fixup -Wl,-enable-auto-import
-Wl,-enable-runtime-pseudo-reloc -mthreads -Wl -Wl,-subsystem,windows -o
debug/testProcess.exe debug/main.o debug/testprocess.o
debug/moc_testprocess.o -L'c:/QtSDK/Desktop/Qt/4.7.2/mingw/lib' -lmingw32
-lqtmaind -LC:/Perl/lib/CORE -lQtGuid4 -lQtCored4
-LC:\OpenSSL-Win32_full\lib

debug/testprocess.o: In function `testProcess':

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:13:
undefined reference to `perl_alloc'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:14:
undefined reference to `perl_construct'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:17:
undefined reference to `perl_parse'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:18:
undefined reference to `perl_destruct'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:19:
undefined reference to `perl_free'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:20:
undefined reference to `Perl_sys_term'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:13:
undefined reference to `perl_alloc'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:14:
undefined reference to `perl_construct'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:17:
undefined reference to `perl_parse'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:18:
undefined reference to `perl_destruct'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:19:
undefined reference to `perl_free'

D:\Work\Programming\QT\testProcess-build-desktop/../testProcess/testprocess.cpp:20:
undefined reference to `Perl_sys_term'

collect2: ld returned 1 exit status

mingw32-make[1]: Leaving directory
`D:/Work/Programming/QT/testProcess-build-desktop'

mingw32-make: Leaving directory
`D:/Work/Programming/QT/testProcess-build-desktop'

mingw32-make[1]: *** [debug/testProcess.exe] Error 1

mingw32-make: *** [debug] Error 2

The process "C:/QtSDK/mingw/bin/mingw32-make.exe" exited with code %2.

Error while building project testProcess (target: Desktop)

When executing build step 'Make'


Do anyone see something I am missing?? any keyword to be included??
Or anyother way to run perl programme step by step from my Qt program?

PS: I don't wanna use System command, I want to somehow collect the code
from user and run it and use its output for further processing.

Thanks in advance.

Yogesh Upreti
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