[MacPorts] #27464: qt4-mac @4.7.1 fails build

[MacPorts]

#27464: qt4-mac @4.7.1 fails build
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 Reporter:  roberto@…             |       Owner:  michaelld@…           
     Type:  defect                |      Status:  new                   
 Priority:  Normal                |   Milestone:                        
Component:  ports                 |     Version:  1.9.2                 
 Keywords:                        |        Port:  qt4-mac               
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Comment(by michaelld@…):

 Hmm ... QtCore looks OK, so I think it must be something related to the
 compiler & how it works on 10.4 versus 10.5+, probably the -isysroot flag.
 On 10.6, scanning through "man gcc", I get:
 {{{
        -isysroot dir
            This option is like the --sysroot option, but applies only to
            header files.  See the --sysroot option for more information.
        --sysroot=dir
            Use dir as the logical root directory for headers and
 libraries.
            For example, if the compiler would normally search for headers
 in
            /usr/include and libraries in /usr/lib, it will instead search
            dir/usr/include and dir/usr/lib.
 }}}

 Although the c++ command is using "-isysroot
 /Developer/SDKs/MacOSX10.4u.sdk", I wonder if maybe 10.4's compiler treats
 it more like "--sysroot=/Developer/SDKs/MacOSX10.4u.sdk" instead.  That
 would correlate with this ticket's issue too.  Can you look through the
 gcc manpage & see what it says about these flags?

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Ticket URL: <https://trac.macports.org/ticket/27464#comment:19>
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