Regarding the library path issue when installing the mongo-c-driver library on github action macos-15

[xengine-qyt]

Output of brew config

HOMEBREW_VERSION: 5.1.6
ORIGIN: https://github.com/Homebrew/brew
HEAD: 299ab19496df6fc76e8356c0b87100ff91ef827e
Last commit: 7 days ago
Branch: stable
Core tap HEAD: 8dc4e0eb2a6f60edbdf565002764d1cce4327a7d
Core tap last commit: 6 days ago
Core tap JSON: 14 Apr 04:46 UTC
Core cask tap HEAD: dbbf7699db6ad627178e80a925f740d3e684f453
Core cask tap last commit: 6 days ago
Core cask tap JSON: 14 Apr 04:46 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: ["--no-quarantine"]
HOMEBREW_COLOR: set
HOMEBREW_DOWNLOAD_CONCURRENCY: 6
HOMEBREW_FORBID_PACKAGES_FROM_PATHS: set
HOMEBREW_MAKE_JOBS: 3
HOMEBREW_NO_AUTO_UPDATE: set
HOMEBREW_NO_INSTALL_CLEANUP: set
Homebrew Ruby: 4.0.2 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/4.0.2_1/bin/ruby
CPU: 3-core 64-bit dunno
Clang: 17.0.0 build 1700
Git: 2.53.0 => /opt/homebrew/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.7.4-arm64
CLT: 16.4.0.0.1.1747106510
Xcode: 16.4 => /Applications/Xcode_16.4.app/Contents/Developer
Rosetta 2: false

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Description of issue

After installing via the command brew install mongo-c-driver@2, I found that the path is incorrect. The return result of pkg-config --cflags mongoc2 is: -I/opt/homebrew/Cellar/mongo-c-driver/2.2.4/include/mongoc-2.2.4 -I/opt/homebrew/Cellar/mongo-c-driver/2.2.4/include/bson-2.2.4, but this path does not actually exist and cannot be found. There is another issue: since all current versions include the version number in the path, won't the link break after mongoc gets a minor version update?

[daeho-ro]

For me, all the paths were fine.

> brew install mongo-c-driver
> pkg-config --cflags mongoc2
-I/opt/homebrew/Cellar/mongo-c-driver/2.3.0/include/mongoc-2.3.0 -I/opt/homebrew/Cellar/mongo-c-driver/2.3.0/include/bson-2.3.0
> ls /opt/homebrew/Cellar/mongo-c-driver/2.3.0/include/mongoc-2.3.0
mongoc
> ls /opt/homebrew/Cellar/mongo-c-driver/2.3.0/include/bson-2.3.0
bson

It could break after the version bump, so you can you opt path like

> ls --tree --depth 2 /opt/homebrew/opt/libmongoc/include/
include
├── bson-2.3.0
│   └── bson
└── mongoc-2.3.0
    └── mongoc

[daeho-ro]

Ah, I see. The path still contains version numbers.

[daeho-ro]

I think this should be resolved from upstream,

• https://github.com/mongodb/mongo-c-driver/blob/027a936c68a34dde38cb13e552cd941f92f27c97/src/libmongoc/CMakeLists.txt#L30-L35
• https://github.com/mongodb/mongo-c-driver/blob/027a936c68a34dde38cb13e552cd941f92f27c97/src/libbson/CMakeLists.txt#L301-L308

They have version in the installation path for libraries.

[xengine-qyt]

I think this should be resolved from upstream,

• https://github.com/mongodb/mongo-c-driver/blob/027a936c68a34dde38cb13e552cd941f92f27c97/src/libmongoc/CMakeLists.txt#L30-L35
• https://github.com/mongodb/mongo-c-driver/blob/027a936c68a34dde38cb13e552cd941f92f27c97/src/libbson/CMakeLists.txt#L301-L308

They have version in the installation path for libraries.

I think so too. I believe this should be a BUG or an unreasonable design.

[daeho-ro]

@p-linnane Do you think is it good to add

    (opt_include/"bson").install_symlink include/"bson-#{version.major_minor_patch}"
    (opt_include/"mongoc").install_symlink include/"mongoc-#{version.major_minor_patch}"

for un-versioned opt_include path?

[daeho-ro]

Not working as I expected,

• mongo-c-driver: add unversioned opt include path homebrew-core#279025

Not sure what is the bast way to improve this.