[MacPorts] #65146: Circular dependency of gcc11 on Snow Leopard

[MacPorts]

#65146: Circular dependency of gcc11 on Snow Leopard
------------------------------+-------------------------
  Reporter:  barracuda156     |      Owner:  catap
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.7.2
Resolution:                   |   Keywords:  snowleopard
      Port:  gcc11, libgcc11  |
------------------------------+-------------------------

Comment (by barracuda156):

 Replying to [comment:2 ryandesign]:
 > Just to clarify: These lines are not in the gcc11 Portfile we publish,
 correct? You have added them? And after you added, them this problem
 appeared?
 >
 > Why did you add these lines? What is the problem you encountered prior
 to this attempt to fix it?

 These are lines from `gcc10-bootstrap` notes: https://github.com/macports
 /macports-ports/blob/master/lang/gcc10-bootstrap/Portfile
 They are necessary in order to build a port using `gcc10-bootstrap`. And
 `gcc11` cannot be built with an Xcode compiler on 10.6.x. The optimal way
 to get to `gcc11` on 10.5–10.6 is to build `gcc10-bootstrap` and then use
 it for `gcc11`.

 By the way, I know now what is the problem: for whatever reason,
 blacklisting `gcc-4.x` prevents Macports from seeing `gcc10-bootstrap`
 setting.

 Specifically, once this is removed `compiler.blacklist-append {clang <
 800} gcc-4.0 *gcc-4.2 {llvm-gcc-4.2 < 2336.1} {macports-clang-3.[4-7]}`, I
 get correct dependencies:
 {{{
 macmini:bin svacchanda$ ./port deps libgcc11
 Full Name: libgcc11 @11.3.0_1
 Extract Dependencies: xz
 Build Dependencies:   gcc10-bootstrap, texinfo, gcc10-bootstrap, cctools,
 gmp,
                       isl, ld64, libiconv, libmpc, mpfr, zstd
 Library Dependencies: zlib
 }}}
 I guess this is a wrong behavior in the base.

-- 
Ticket URL: <https://trac.macports.org/ticket/65146#comment:3>
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