qt4-creator-mac 2.8.0_1 fails building on 10.5.8 PPC

[udbraumann]

While building buildgraph/automoc.cpp the compiler mode "warnings being treated as errors" is switched on, unfortunately a few warnings of the type "... has virtual functions but non-virtual destructor" or "... has virtual functions but non-virtual destructor" do follow, and consequently do stop further compiling.

[udbraumann]

error report refers to r108753

[ryandesign (Ryan Carsten Schmidt)]

Are you really running MacPorts 2.2? Run "port version" to find out. The log shows you are on Leopard and are using gcc 4.0, but as of MacPorts 2.2, the default compiler on Leopard should be gcc 4.2. If you're not on MacPorts 2.2 yet, please update by running "sudo port selfupdate" twice.

[udbraumann]

Yes, I run macports version 2.2:

$ sudo port version
Version: 2.2.0

And I have run

sudo port selfupdate

more than twice since it was released a few days before.

If my memory serves me right, yesterday I was also testing gcc 4.2 for building qt4-creator-mac using the configure.compiler in the command line, but got the same problem with the "warnings being treated as errors" issue.

Here is what a check for gcc versions gives on my PowerBook G4:

$ sudo port select --list gcc
Available versions for gcc:
	gcc33
	gcc40 (active)
	gcc42
	llvm-gcc42
	mp-gcc45
	none

[macports@…]

Could you also append the build log of your attempt using gcc42?

[udbraumann]

udo port upgrade qt4-creator-mac configure.compiler=gcc-4.2

[macports@…]

Trac somehow failed to notify me by mail that a new file was added to this ticket. Sorry for the late response.

[macports@…]

Hmm, the log shows that it keeps using g++-4.0... you may have to rebuild qt4-mac as well.

[udbraumann]

Hmm, to my surprise you were right, once I had rebuild qt4-mac setting gcc42 as compiler calling

sudo port install qt4-mac configure.compiler=gcc-4.2

then I again called

sudo port upgrade qt4-creator-mac configure.compiler=gcc-4.2

and - voilà - qt4-creator-mac 2.8.1 could be built.

For some unknown reason during the building of qt4-creator-mac that compiler setting is used which was previously taken for building qt4-mac, other settings might be ignored (see above). So I suggest to modify the portfile of qt4-mac in order to obligatory select gcc42 there. And maybe the mechanism of building qt4-creator-mac also needs some repair, I would have expected that a compiler setting using configure.compiler is strictly accepted.

gcc40 anyway is not sufficient for qt4-creator-mac 2.8.1

[macports@…]

Well, Qt-based applications are expected to be built with the same toolchain (so-called mkspecs) that was used to build the Qt libraries. This makes sense because different compilers may use different, incompatible ABIs.

To be honest, I don't know if gcc40 and gcc42 are 100 % ABI-compatible or if we might run into trouble when building qt4-creator-mac with a different toolchain than qt4-mac. So I guess the best fix for PowerPC would indeed be to force qt4-mac to be built with gcc42.

[udbraumann]

Thanks, so I think this ticket could be closed as soon as the maintainer of qt4-mac has adopted our proposition to require gcc42 for building qt4-mac? Could you please draw a ticket there in order to let him do the fix? I think, also this port qt4-creator-mac could default to a gcc42 usage - even though we now know that implicitly that compiler is taken for qt4-creator-mac which was previously used for qt4-mac.

[macports@…]

Reported in ticket #40422.

[cooljeanius (Eric Gallager)]

Cc Me!

[chrstphrchvz (Christopher Chavez)]

Current maintainer is michaelld.

qt4-creator-mac is now at 2.8.1. Is this issue still present?

[barracuda156]

Replying to chrstphrchvz:

Current maintainer is michaelld.

qt4-creator-mac is now at 2.8.1. Is this issue still present?

At least on 10.6 PPC and 10.6.8 Rosetta it does build. Cannot say for sure about Leopard, need to check.