<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><meta http-equiv="x-dns-prefetch-control" content="off"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>Hello,<br><br>
I just wanted to point out what could seems a very small detail at
first, but in the end, I spent quite a few hours (even days) to find it
out.<br>
<br>
My environments are the following:<br>
First:<br>
Win32 - XP Pro<br>
Qt 4.6.2 (opensource edition)<br>
ITK 3.12 and 3.16<br>
Mingw 3.4.5 and 4.4.0<br>
<br>
Second:<br>
Ubuntu 9.10 (Karmic Koala) 32 bits<br>
Qt 4.6.2 (opensource edition)<br>
ITK 3.18<br>
compiler: gnu 4.4.1<br>
<br>
On both configuration: CMake v2.8<br>
<br>
I wanted to use Qt and ITK together in my applications and with mingw
3.4.5 (and now 4.4) for Win32 or gnu 4.4.1 for Linux. But when
compiling, I had weird errors about std::size_t not found. Typical errors when we are missing includes or dependencies.<br>
I tried with Win32 using microsoft visual studio, but there was no
problem. It only appears with the g++ compiler.<br>
<br>
<br>
Step to reproduce the problem:<br>
Prerequisite: Qt and ITK correctly set up.<br>
Write a simple main.cpp program which include qapplication.h (for example).<br>
Create a makefile which contains Qt and all ITK dependencies and
includes ( don't forget Utilities\itksys - it's there that the problem
lies).<br>
Run make --> error<br>
If you remove all the ITK dependencies and includes, the make succeeds
(but then we can not use ITK :(!!).<br>
<br>
<br>
How I solved it:<br>
The problem is in the install directory of ITK.<br>
To build and install ITK, I used CMake. In the settings, I remove
threading (because I don't need it). The CMake part and the build of ITK
runs smoothly.<br>
Then I run "make install". So far, so good; everything is installed in
my install directory (I thought).<br>
<br>
In fact, the filename cstddef does not contain the '.h' extension in the
directory<br>
"install \ include \ InsightToolkit \ Utilities \ itksys".<br>
I changed this (renamed cstddef to cstddef.h), and then, everything went
well for me from that point on.<br>
<br>
Is there any particular reason for this file not to have the .h
extension as all its friends next to it in the directory? or is this a
bug ?<br>
<br>
I spent quite a long time to find this out, by first rechecking my code
(before going to a simple study case), redownloading and recompiling Qt
and ITK, changing compilers version and so on.<br>
<br>
If my current fix (the fact to add the extension '.h' to the cstddef filename) is not
recommended, please, let me know, but if you could help me fix
my problem then, I'll take any suggestions.<br><br>Anyway, my proposed fix might help somebody.<br>
<br>
good day,<br>
<br>
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