[Qt-interest] Compiling from source

[Robert Hairgrove]

Peter M. Groen wrote:
> Hi All,
> 
> I tried compiling Qt 4.6 from sources ( MaxOSX 10.6 Snow Leopard ) but
> it always breaks on the WebCore.
> 
> The only success I had on compiling was with the WebCore option
> disabled. What could be the problem here? What am I missing?
> 

Hello, I just ran into the same problem when compiling Qt 4.6.0 on Mac 
OSX 10.5.8 with a configuration which included MySQL support and WebKit. 
I got the exact error messages which you did, and I can confirm that it 
is indeed a conflicting header file.

The default Mac installation puts all of the MySQL libraries into 
/usr/local/mysql-5.*-osx10.*-x86 and then advises to create an alias 
"mysql" to that directory. Still, the Qt configure program cannot find 
the MySQL include nor the lib directory by itself. However, including 
the include directory as an -I switch will cause this directory to be 
searched before all others, thus causing the conflict.

It seems that the header "plugin.h" is probably the culprit, although 
I'm not 100% sure about it. What I did to solve the problem was to add a 
single symbolic link (alias) to the single header file "mysql.h" in the 
/usr/local/include directory and only added an -L switch to the 
configure program so that the linker can find the MySQL libs. Then I 
invoked "make" again (repeatedly) and watched which additional headers 
were claimed as missing. There are about 5 or 6 of these, namely:

mysql.h
my_alloc.h
my_list.h
mysql_com.h
mysql_time.h
mysql_version.h
typelib.h

OK, there are 7 of them total. ... Anyway, once you have these in place, 
and have added the -L switch to the configuration, everything should 
compile and build correctly. But don't make a symlink to the entire 
directory because you will get the conflict with at least one of the 
other header files in that directory; you have to make links to the 
individual files.

Please note that I haven't actually had time to USE anything of the new 
Qt installation yet, so "caveat emptor" applies!

HTH