[MacPorts] #62184: gcc-devel on big sur Apple Silicon w/ xcode 12.4 fails to assemble pc-relative literal loads

[MacPorts]

#62184: gcc-devel on big sur Apple Silicon w/ xcode 12.4 fails to assemble pc-
relative literal loads
--------------------+-----------------------
 Reporter:  blu     |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  gcc-devel
--------------------+-----------------------
 gcc-devel @11-20210124 on big sur Apple Silicon w/ xcode 12.4 fails to
 assemble pc-relative literal loads (-mpc-relative-literal-loads)
 {{{
 // repro.cpp
 int       __attribute__ ((vector_size(sizeof(int) * 4))) x;
 int const __attribute__ ((vector_size(sizeof(int) * 4))) y = { 1, 2, 3, 4
 };

 int main(int, char**)
 {
     int const __attribute__ ((vector_size(sizeof(int) * 4))) z = x * y;
     return z[0] + z[1] + z[2] + z[3];
 }

 $ xcrun g++-mp-devel repro.cpp -mpc-relative-literal-loads
 }}}

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Ticket URL: <https://trac.macports.org/ticket/62184>
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