[Qt-interest] Qt 4.5 on Mac OSX: Attempt to build quad frameworks omits -arch i386 from CFLAGS/CXXFLAGS

[Rush Manbert]

On Mar 16, 2009, at 3:42 AM, Trenton Schulz wrote:

> On 2009-03-12 18:33:26 +0100, Rush Manbert <rush at manbert.com> said:
>
>> Based on information from Mike Jackson, I attempted to build a  
>> shared,
>> framework-based, quad library version of Qt 4.5.
>>
>> My configure command as:
>> time ./configure -prefix /Users/rmanbert/temp/qt4.5.0-quadDylib - 
>> debug-
>> and-release -no-qt3support -cocoa -framework -webkit -arch i386 -arch
>> x86_64 -arch ppc -arch ppc64 -platform macx-g++
>>
>> After building qmake, configure shows me this:
>> Build type:    macx-g++
>> Architecture:  macosx ( i386 x86_64 ppc ppc64 )
>> Using framework: Cocoa
>>
>>

<snip>

>>
>> I ran make and noticed that none of the compile commands included -
>> arch i386. They has the other 3 architectures specified, but not  
>> i386.
>>
>> I stopped the make, found some object files and ran lipo -info on
>> them. Lipo says "Architectures in the fat file: qmutex.o are: ppc64
>> ppc7400 x86_64"
>>
>> Since I specified the i386 architecture first in my configure command
>> and it was missing in the Makefiles, I tried again with ppc specified
>> first. The Makefiles once again define these flags:
>> CFLAGS        = -pipe -g -gdwarf-2 -arch ppc64 -Xarch_ppc64 -mmacosx-
>> version-min=10.5 -arch x86_64 -Xarch_x86_64 -mmacosx-version- 
>> min=10.5 -
>> arch ppc -Wall -W $(DEFINES)
>> CXXFLAGS      = -pipe -g -gdwarf-2 -arch ppc64 -Xarch_ppc64 -mmacosx-
>> version-min=10.5 -arch x86_64 -Xarch_x86_64 -mmacosx-version- 
>> min=10.5 -
>> arch ppc -Wall -W $(DEFINES)
>> LFLAGS        = -headerpad_max_install_names -arch ppc64 - 
>> Xarch_ppc64 -
>> mmacosx-version-min=10.5 -arch x86_64 -Xarch_x86_64 -mmacosx-version-
>> min=10.5 -arch ppc
>>
>> and again the i386 is missing.
>>
>> I'm building on an Intel Mac, so it almost seems like the Makefiles
>> assume there will be a implicit compilation for i386, but the lipo
>> results say that's not true.
>>
>> I suspect this is a bug, but maybe I have done something wrong. Does
>> anyone else have experience with this?
>
> It shouldn't make a difference but could you adjust your configure  
> line
> to do specify the arch like this:
>
> -arch "ppc x86 ppc64 x86_64"
>
> Note the quotes!
>
> If that works, please file a bug, because both ways should work.
>
> Good luck,

Hi Trenton,

So I tried what you wrote and it worked. I was filing the bug report  
when I noticed that your arch specification says "x86" and not "i386".  
I went back and tried again with "-arch ppc -arch x86 -arch ppc64 - 
arch x86_64" and then grepped the Makefiles. This time they all have "- 
arch i386" as part of the CFLAGS and CXXFLAGS.

IMHO, the real issue is that configure takes "-arch i386" but  
internally only looks for "x86". While this is consistent with "-arch  
x86_64", GCC (and Xcode) is inconsistent in this regard and uses  
"i386". If the Qt configure is going to use a different architecture  
name in its command line arguments than what the compiler wants to  
see, doesn't it seem like it should complain about "-arch i386"?  
Either that or it should look for it internally so it propagates into  
the Makefiles.

- Rush