Generated bindings for jq 1.6.

The bindings were generated with bindgen, which is available via cargo install.

Example:

$ git submodule update --init
$ bindgen modules/jq/src/jq.h -o src/bindings.rs

When the bundled feature is enabled it will add a dependency on jq-src, which will attempt to build and link to the library. This may cover simple cases, but for anything exotic (such as cross-building), you will want to install or build libjq yourself.

Note: when using the bundled feature libjq is provided by the jq-src crate, which requires gcc, autoreconf, make, etc in your PATH to build.

When not using the bundled feature, you'd either have to compile libjq yourself, or use libs furnished by your system package manager.

For example on debian systems, you might install libjq1 libjq-dev libonig4 libonig-dev.

The following env vars can be used to provide hints to the build script.

Note that if you are using the pkg-config feature and it is unable to locate libjq, can specify the location explicitly by setting JQ_LIB_DIR.

This may be required on debian based distros (including ubuntu) since, at the time of writing, the distro packages for jq do not include the .pc files required for pkg-config to locate the files.

• Update optional dep on jq-src to mitigate build failures when using the bundled feature.

• re-generated src/bindings.rs with bindgen v0.49.2.
• Updated dependency on jq-src to v0.3.
• Updated build.rs to avoid rebuilding jq from source more often than needed when using bundled feature (#2).

Additions:

• New env vars added to allow linkage to libjq and libonig to be customized.
• Adds pkg-config feature (on by default) to help configure linkage, as a fallback when env vars are not set.

Breaking changes:

• bundled feature is no longer enabled by default.

Added bundled feature (on by default) to allow dependents to opt in or out from using the jq-src crate for linkage.

Initial release.