pkg/57430: graphics/libimagequant-4.2.0 requires unbuildable packages on Solaris 10

[hiroshi-hakoyama%nagano.ac.jp@localhost]

>Number:         57430
>Category:       pkg
>Synopsis:       graphics/libimagequant-4.2.0 requires unbuildable packages on Solaris 10
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 24 00:35:00 +0000 2023
>Originator:     Hiroshi Hakoyama
>Release:        current pkgsrc
>Organization:
Institute of Freshwater Biology, Nagano University
>Environment:
SunOS ec21 5.10 Generic_147147-26 sun4u sparc SUNW,Sun-Blade-1000
>Description:
libimagequant updated from 2.18.0 to 4.2.0 which is written in rust.
The update requires new dependencies: 
gcc7-7.5.0nb6
llvm-15.0.7nb1
rust-1.69.0
cargo-c-0.9.19, etc,
which are hard to build on Solaris 10 with gcc 5.

cvsgraph is affected by this modification because it depends on libimagequant.
>How-To-Repeat:
cd /usr/pkgsrc/graphics/libimagequant
make

>Fix:
unknown