[MacPorts] #62072: gcc5 @5.5.0_6: build fails on 10.7: error: invalid operand for instruction movabsq 34359738368, %rax

[MacPorts]

#62072: gcc5 @5.5.0_6: build fails on 10.7: error: invalid operand for instruction
movabsq 34359738368, %rax
----------------------------+--------------------
  Reporter:  kencu          |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:  lion
      Port:  gcc5, cctools  |
----------------------------+--------------------

Comment (by ryandesign):

 The
 [https://build.macports.org/builders/ports-10.7_x86_64-builder/builds/41116/steps
 /install-port/logs/stdio build does succeed on 10.7] after that change,
 but I don't understand why. All you did was add a dependency on clang-9.0.
 You didn't do anything to tell the build to use any part of clang-9.0 and
 I don't see anything in the log that suggests any part of clang-9.0 is
 being used.

 > we know that if a version of macports-clang >= 5.0 is installed, then
 cctools' as driver will use that as assembler instead of the system clang

 How do we know this? How does this happen?

-- 
Ticket URL: <https://trac.macports.org/ticket/62072#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS