[MacPorts] #66024: libgcc10 does not seem to install libgcc_ext.10.x dylibs, leaves gcc7 broken

[MacPorts]

#66024: libgcc10 does not seem to install libgcc_ext.10.x dylibs, leaves gcc7
broken
--------------------------+----------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.7.2
 Keywords:                |       Port:  libgcc10
--------------------------+----------------------
 Just built libgcc10 10.4.0_3, and it installed literally nothing:
 {{{
 @name libgcc10-10.4.0_3+stdlib_flag
 @portname libgcc10
 @portepoch 7
 @portversion 10.4.0
 @portrevision 3
 @archs ppc
 @portvariant +stdlib_flag
 @pkgdep libgcc11-11.3.0_4
 opt/local/share/doc/libgcc10/README
 @comment MD5:5db79c988f1262e25f04ef5e35e8d306
 @comment binary:0
 @ignore
 +COMMENT
 @ignore
 +CONTENTS
 @ignore
 +DESC
 @ignore
 +PORTFILE
 @ignore
 +STATE
 @cxx_stdlib none
 @cxx_stdlib_overridden 0
 }}}

 Portfile has the following:
 {{{
 if { ${os.arch} eq "arm" } {
     set install_dylibs {libgcc_s.2.dylib libgcc_ext.10.4.dylib
 libgcc_ext.10.5.dylib}
 } else {
     set install_dylibs {libgcc_ext.10.4.dylib libgcc_ext.10.5.dylib}
 }
 }}}

 And I expected it to install these two dylibs, which are needed by gcc7 to
 work. 4+ hrs for nothing, gcc7 still broken -_-
 What is going wrong with that?

 P. S. Why do we even need to build multi-hour ports which install nothing
 but a few lines of readme?

-- 
Ticket URL: <https://trac.macports.org/ticket/66024>
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