[MacPorts] #34233: apple-gcc42 doesn't honor -isysroot correctly

[MacPorts]

#34233: apple-gcc42 doesn't honor -isysroot correctly
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 Reporter:  jeremyhu@…             |       Owner:  royliu@…           
     Type:  defect                 |      Status:  new                
 Priority:  Normal                 |   Milestone:                     
Component:  ports                  |     Version:  2.0.4              
 Keywords:                         |        Port:  apple-gcc42        
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Comment(by jeremyhu@…):

 Use -v with a sample compile, and you will see.  The problem is that
 -I/opt/local/include becomes ${SDKROOT}/usr/include.  So a case where this
 fails is for anything built which wants to use anything from MacPorts.

 Without -isysroot, gcc -v shows the search path as:
 {{{
  /opt/local/include
  /usr/local/include
  /opt/local/lib/apple-gcc42/gcc/i686-apple-darwin12/4.2.1/include
  /usr/include
  /System/Library/Frameworks (framework directory)
  /Library/Frameworks (framework directory)
 }}}

 With -isysroot and my patch, gcc shows it as:
 {{{
 /opt/local/include
 /opt/local/lib/apple-gcc42/gcc/i686-apple-darwin12/4.2.1/include
 ${SDKROOT}/usr/include
 ${SDKROOT}/System/Library/Frameworks (framework directory)
 }}}

 ie, it looks for /usr/{local/,}include and {/S,}/L/F content inside the
 SDKROOT but not the compiler's internals.  Your patch doesn't match that
 behavior.  It does as you described above.  #1 is correct.  #2 isn't.

-- 
Ticket URL: <https://trac.macports.org/ticket/34233#comment:17>
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