Ok, so this is now officially weird. I decided to try to compile khello.cc from the KDE tutorial on my 4.8 system that has never had me attempt to upgrade KDE on it.If you have a pointer to the KDE tutorial/code you're using, may be of more help, but here's a quick 'khello' program, step by step:
When I compile khello.cc, it compiles fine, when I link it I get this:
-----------------------------snip----------------------------------------------------------------
ddp% make
g++ -o khello -R/usr/X11R6/lib -L/usr/local/lib/kde3/ -L/usr/local/lib -L/usr/X11R6/lib -lqt-mt -pthread -lkdeui -lkdecore -lXft khello.o
/usr/local/gnu/lib/gcc-lib/i386-unknown-freebsd4.8/3.2.3/../../../../i386-unknown-freebsd4.8/bin/ld: warning: libstdc++.so.3, needed by /usr/X11R6/lib/libqt-mt.so, may conflict with libstdc++.so.5
/usr/lib/libc.so.4: WARNING! setkey(3) not present in the system!
/usr/lib/libc.so.4: warning: this program uses gets(), which is unsafe.
/usr/lib/libc.so.4: warning: mktemp() possibly used unsafely; consider using mkstemp()
/usr/lib/libc.so.4: WARNING! des_setkey(3) not present in the system!
/usr/lib/libc.so.4: WARNING! encrypt(3) not present in the system!
/usr/lib/libc.so.4: warning: tmpnam() possibly used unsafely; consider using mkstemp()
/usr/lib/libc.so.4: warning: this program uses f_prealloc(), which is not recommended.
/usr/lib/libc.so.4: WARNING! des_cipher(3) not present in the system!
/usr/lib/libc.so.4: warning: tempnam() possibly used unsafely; consider using mkstemp()
khello.o(.text+0x2b): In function `main':
: undefined reference to `QCString::QCString[in-charge](char const*)'
khello.o(.text+0x48): In function `main':
: undefined reference to `KApplication::KApplication[in-charge](int&, char**, QCString const&, bool, bool)'
khello.o(.text+0x68): In function `main':
: undefined reference to `QCString::~QCString [in-charge]()'
khello.o(.text+0x8e): In function `main':
: undefined reference to `QCString::~QCString [in-charge]()'
khello.o(.text+0xc2): In function `main':
: undefined reference to `KMainWindow::KMainWindow[in-charge](QWidget*, char const*, unsigned)'
khello.o(.text+0x16e): In function `main':
: undefined reference to `QApplication::setMainWidget(QWidget*)'
khello.o(.text+0x19d): In function `main':
: undefined reference to `QApplication::exec()'
khello.o(.text+0x1b1): In function `main':
: undefined reference to `KApplication::~KApplication [in-charge]()'
khello.o(.text+0x1d7): In function `main':
: undefined reference to `KApplication::~KApplication [in-charge]()'
collect2: ld returned 1 exit status
make: *** [khello] Error 1
ddp% -----------------------------------------------------------------------------------------
So what am I missing?
--Chuck _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
[EMAIL PROTECTED] KDETutorial]$ cat main.cc #include <qapplication.h> #include <qpushbutton.h>
int main(int argc,
char **argv)
{
QApplication app( argc, argv );QPushButton *hello=new QPushButton( "Hello world!", 0 ); hello->resize(200, 30 );
QObject::connect(hello,
SIGNAL(clicked()),
&app,
SLOT(quit()) );app.setMainWidget(hello); hello->show();
return app.exec(); }
[EMAIL PROTECTED] KDETutorial]$ g++ main.cc
main.cc:1:26: qapplication.h: No such file or directory
main.cc:2:25: qpushbutton.h: No such file or directory
main.cc: In function `int main(int, char**)':
main.cc:7: `QApplication' undeclared (first use this function)
main.cc:7: (Each undeclared identifier is reported only once for each function
it appears in.)
main.cc:7: syntax error before `(' token
main.cc:9: `QPushButton' undeclared (first use this function)
main.cc:9: `hello' undeclared (first use this function)
main.cc:9: syntax error before `(' token
main.cc:12: `QObject' undeclared (first use this function)
main.cc:12: syntax error before `::' token
main.cc:17: `app' undeclared (first use this function)
We're missing the header location in our include path (because we didn't specify one), so let's find it:
[EMAIL PROTECTED] KDETutorial]$ locate qapplication.h /usr/share/doc/qt-devel-3.1.2/html/qapplication.html /usr/lib/qt-3.1/include/qapplication.h
The latter is the one we need, so feed the path as an include path to g++ via the -I switch:
[EMAIL PROTECTED] KDETutorial]$ g++ main.cc -I /usr/lib/qt-3.1/include
/tmp/ccC2zAn3.o(.text+0x23): In function `main':
: undefined reference to `QApplication::QApplication[in-charge](int&, char**)'
/tmp/ccC2zAn3.o(.text+0x52): In function `main':
: undefined reference to `QString::QString[in-charge](char const*)'
/tmp/ccC2zAn3.o(.text+0x61): In function `main':
: undefined reference to `QPushButton::QPushButton[in-charge](QString const&, QWidget*, char const*)'
/tmp/ccC2zAn3.o(.text+0x12c): In function `main':
: undefined reference to `QObject::connect(QObject const*, char const*, QObject const*, char const*)'
/tmp/ccC2zAn3.o(.text+0x13e): In function `main':
: undefined reference to `QApplication::setMainWidget(QWidget*)'
/tmp/ccC2zAn3.o(.text+0x164): In function `main':
: undefined reference to `QApplication::exec()'
/tmp/ccC2zAn3.o(.text+0x175): In function `main':
: undefined reference to `QApplication::~QApplication [in-charge]()'
/tmp/ccC2zAn3.o(.text+0x195): In function `main':
: undefined reference to `QApplication::~QApplication [in-charge]()'
/tmp/ccC2zAn3.o(.gnu.linkonce.t._ZN7QStringD1Ev+0x21): In function `QString::~QString [in-charge]()':
: undefined reference to `QString::shared_null'
/tmp/ccC2zAn3.o(.gnu.linkonce.t._ZN7QStringD1Ev+0x30): In function `QString::~QString [in-charge]()':
: undefined reference to `QStringData::deleteSelf()'
collect2: ld returned 1 exit status
Looks like what you've got, which isn't surprising- I'll bet we can compile to an object file only however, let's test using -c for 'compile but don't link' to g++:
[EMAIL PROTECTED] KDETutorial]$ g++ -c main.cc -I /usr/lib/qt-3.1/include [EMAIL PROTECTED] KDETutorial]$ ls -l main.* -rw-rw-r-- 1 wegster wegster 380 Mar 2 19:05 main.cc -rw-rw-r-- 1 wegster wegster 2816 Mar 2 19:13 main.o
Yep, that works. But to get a running executable, you need to resolve library dependencies, in this case likely the QT library...let's find it first:
[EMAIL PROTECTED] KDETutorial]$ locate libqt /usr/lib/qt-3.1/lib/libqt-mt.so.3.1.2 /usr/lib/qt-3.1/lib/libqt-mt.so.3 /usr/lib/qt-3.1/lib/libqt-mt.so.3.1 /usr/lib/qt-3.1/lib/libqt.so.3.1 /usr/lib/qt-3.1/lib/libqt.so.3 /usr/lib/qt-3.1/lib/libqt.so.3.1.2 /usr/lib/qt-3.1/lib/libqt-mt.so /usr/lib/qt-3.1/lib/libqt.so /usr/lib/libqthreads.so.12.3.0 /usr/lib/libqthreads.so.12 /usr/lib/libqtmcop.la /usr/lib/libqtmcop.so.1 /usr/lib/libqtmcop.so.1.0.0 /usr/lib/libqtmcop.so
What we really want here is likely the libqt, so add the compile time library path via -L switches, and finally the short name (lib name - the 'lib' prefix and the versioning) of the library we want to link against:
[EMAIL PROTECTED] KDETutorial]$ g++ main.cc -I /usr/lib/qt-3.1/include -L/usr/lib/qt-3.1/lib/ -lqt
[EMAIL PROTECTED] KDETutorial]$ ./a.out
Works ;-)
NOTE: This was done on a RHES system, because I've got the KDE development headers and libs installed. For FreeBSD, you'll need the qt sources or a KDE development package, although I'm not entirely sure which offhand...
HTH, Scott
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