Issue #20233 has been updated by kou (Kouhei Sutou). Can we close this because https://github.com/ruby/ruby/pull/9815 was merged? ---------------------------------------- Feature #20233: pkg-config not working on MSVC https://bugs.ruby-lang.org/issues/20233#change-112695 * Author: jmarrec (Julien Marrec) * Status: Open ---------------------------------------- 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. -- https://bugs.ruby-lang.org/