Re: [MacPorts] #70170: ctpv @1.1: error: expected ‘;’, ‘,’ or ‘)’ before ‘__VA_OPT__’

[MacPorts]

#70170: ctpv @1.1: error: expected ‘;’, ‘,’ or ‘)’ before ‘__VA_OPT__’
---------------------------+-------------------------
  Reporter:  barracuda156  |      Owner:  suhailskhan
      Type:  defect        |     Status:  reopened
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.3
Resolution:                |   Keywords:
      Port:  ctpv          |
---------------------------+-------------------------
Changes (by suhailskhan):

 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 >Blacklisting old compilers is not necessarily the solution we want. For
 example, if the only problem is that this code needs C99, then gcc 4.2
 supports C99 and should simply be instructed to use it via the -std=c99 or
 -std=gnu99 flag.

 After looking more into this, I found that `__VA_OPT__` is a C23/C++20
 feature.

 Replacing the `compiler.blacklist-append` line with `compiler.cxx_standard
 2020` may be the correct solution. It fixes the build when I tested it on
 Snow Leopard, and hopefully should for Leopard and preview builds of Snow
 Leopard as well. I tried using `compiler.c_standard 2023` as well, but the
 build failed.

-- 
Ticket URL: <https://trac.macports.org/ticket/70170#comment:10>
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