[MacPorts] #32575: python3: llvm-3.1 fails to build with python3 selected

[MacPorts]

#32575: python3: llvm-3.1 fails to build with python3 selected
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 Reporter:  jonesc@…                  |       Owner:  jeremyhu@…           
     Type:  defect                    |      Status:  assigned             
 Priority:  Normal                    |   Milestone:                       
Component:  ports                     |     Version:  2.0.3                
 Keywords:  python3                   |        Port:  llvm-3.1             
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Comment(by jmr@…):

 It doesn't look like modifying anything in the environment will work. It
 executes llvm-build directly, not as an argument to an interpreter, so the
 `#!/usr/bin/env python` in the shebang gets used. Just patching that to
 /usr/bin/python should be fine.

 Upstream should probably add an AM_PATH_PYTHON to configure, and a
 $(PYTHON) to the invocation in Makefile.rules.

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Ticket URL: <https://trac.macports.org/ticket/32575#comment:13>
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