[MacPorts] #15772: ccache support sets incompatible compiler

[MacPorts]

#15772: ccache support sets incompatible compiler
----------------------------------+-----------------------------------------
 Reporter:  landonf at macports.org  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  defect                |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  1.6.0                                
 Keywords:                        |  
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 Prior to the introduction of ccache-specific functionality, ccache could
 be enabled by setting the binpath in macports.conf. This would result in
 standard compiler names being found in /opt/local/libexec/ccache.

 With the introduction of ccache-specific functionality -- in of itself a
 layering violation -- the compiler is now munged at configure-time:

 {{{
 CC=ccache /usr/bin/gcc-4.0
 }}}

 This "two word" CC command breaks some otherwise valid Makefile that
 expect CC to be a single command. An example:

 {{{
 ifndef $(CXX)
     CXX = c++
 endif
 }}}


 Results in:

 {{{
 Makefile:8: *** invalid syntax in conditional.  Stop.
 }}}

-- 
Ticket URL: <http://trac.macports.org/ticket/15772>
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