ENVIRONMENT:
------------

Hardware Overview:

  Model Name: Mac mini
  Model Identifier: Macmini2,1
  Processor Name: Intel Core 2 Duo
  Processor Speed:  2 GHz
  Number Of Processors: 1
  Total Number Of Cores:  2
  L2 Cache: 4 MB
  Memory: 2 GB
  Bus Speed:  667 MHz
  Boot ROM Version: MM21.009A.B00
  SMC Version (system): 1.19f2

QtCore:

  Version:  4.6
  Last Modified:  4/23/10 3:50 PM
  Get Info String:  Created by Qt/QMake
  Location: /Library/Frameworks/QtCore.framework
  Private:  No

QtGui:

  Last Modified:  4/23/10 3:50 PM
  Location: /Library/Frameworks/QtGui.framework
  Private:  No


NARRATIVE:
----------

Originally, I had tried to install Qt4-mac using macports, with
which I have had great success in the past. This didn't work.

After downloading the Qt SDK which includes Qt 4.6 application
framework and Qt Creator 1.3 IDE, to my Mac, running OS X 10.5,
I tried to compile the simple program below from the command line.
Following the instructions on pages 3 & 4 of the online text:

  Blanchette, Summerfield. C++ GUI Programming with Qt4, 2006

I entered this program into my 'hello' directory:

# include <QApplication>
# include <QLabel>

int main(int argc char *argv[]) {
  QAppllication app(argc, argv);
  QLabel * label = new QLabel("Hello Qt!");
  label->show();
  return app.exec();
}

[bgscott@hello]$ lf
hello.cpp
[bgscott@hello]$ qmake -project
QFileInfo::absolutePath: Constructed with empty filename
[bgscott@hello]$ qmake hello.pro
[bgscott@hello]$ lf
Info.plist       hello.cpp        hello.pro        hello.xcodeproj/
[bgscott@hello]$ make hello
g++     hello.cpp   -o hello
hello.cpp:1:25: error: QApplication: No such file or directory
hello.cpp:2:19: error: QLabel: No such file or directory
hello.cpp:4: error: expected ‘,’ or ‘...’ before ‘char’
hello.cpp: In function ‘int main(int)’:
hello.cpp:5: error: ‘QAppllication’ was not declared in this scope
hello.cpp:5: error: expected `;' before ‘app’
hello.cpp:6: error: ‘QLabel’ was not declared in this scope
hello.cpp:6: error: ‘label’ was not declared in this scope
hello.cpp:6: error: expected type-specifier before ‘QLabel’
hello.cpp:6: error: expected `;' before ‘QLabel’
hello.cpp:8: error: ‘app’ was not declared in this scope
make: *** [hello] Error 1
[bgscott@hello]$ 

It appears to me that the path to the include directory is not
properly specified.

When I tried to compile the program using Xcode, the following error
message is generated:

  Building target “hello” of project “hello” with configuration
      “Debug” — (1 error)
    Checking Dependencies
      target specifies product type 'com.apple.product-type.application',
      but there's no such product type for the 'macosx' platform
  Build failed (1 error)

When I examine the Groups & Files panel, produced from
QtGui.framework > Headers, I find that QApplication points at
"qapplication.h" and QLabel points at "qlabel.h" via their respective
include statements. I am very confused. For most simple programs that
I develop, I usually work directly from the command line, bypassing
the intricacies of the IDEs, such as Xcode. The fact, however, that the
IDE seems to be having problems suggests that something in the install
went amiss.