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Set PKG_CONFIG_PATH to ensure gpgme builds with local libassuan
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We had some build failures on macOS with this error:

```
configure: Use gpgrt-config as libassuan-config
checking for LIBASSUAN - version >= 2.4.2... yes (3.0.1)
checking LIBASSUAN API version... does not match.  want=2 got=3.
```

This occurs when:

1. libassuan v3.0 is installed.
2. `PKG_CONFIG_PATH` includes the Homebrew path of `/opt/homebrew/lib/pkgconfig`.

https://github.com/gpg/gpgme/blob/5bf3e6d0754a179b316f90a885371af99bc03ea1/m4/libassuan.m4#L32
attempts to run `gpgrt-config libassuan --exists`. This will return
the Homebrew version of libassuan if `PKG_CONFIG_PATH` includes it.

To avoid this build failure, preface `PKG_CONFIG_PATH` with the
local vesions of libassuan and libgpg-error.
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stanhu committed Aug 27, 2024
1 parent bae97e2 commit 83f20f9
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10 changes: 10 additions & 0 deletions ext/gpgme/extconf.rb
Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,16 @@
recipe.activate
end

pkg_config_paths = [
File.join(libgpg_error_recipe.lib_path, 'pkgconfig'),
File.join(libassuan_recipe.lib_path, 'pkgconfig'),
]

# Ensure that the locally-built libraries take precedence. gpgme runs
# `gpgrt-config libassuan` and could pull in the system libassuan
# if PKG_CONFIG_PATH is not set properly.
ENV["PKG_CONFIG_PATH"] = [*pkg_config_paths, ENV["PKG_CONFIG_PATH"]].compact.join(File::PATH_SEPARATOR)

gpgme_recipe = MiniPortile.new('gpgme', '1.21.0').tap do |recipe|
recipe.target = File.join(ROOT, "ports")
recipe.files = [{
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