Feature #20233: pkg-config not working on MSVC

• Status: Open
• Assignee: -
• Target version: -

[jmarrec (Julien Marrec)]

The PKG_CONFIG variable is not respected in win32/Makefile.sub

Also, need to ideally use the --msvc-syntax flag (pkgconf 1.4.0, released 7 years ago, adds it).

But mostly, I realized that the try_ldflags in lib/mkmf.rb actually passes these ldflags as the opt parameter to the link_command function, and not as ldflags. While the UNIX systems are forgiving, the MSVC compiler is not, and because the flags are passed before the -link, MSVC complains that it ignores it and therefore cannot find the requested library.

[jmarrec (Julien Marrec)]

Potential implemented at https://github.com/ruby/ruby/pull/9815#pullrequestreview-1858695400