CHICKEN is a Scheme-to-C compiler supporting most of the language features as defined in the Revised^5 Report on Scheme and Revised^7 Report on Scheme small language. CHICKEN generates quite portable C code, and files compiled by it (including itself) should work without any changes on most platforms. The whole package is distributed under a BSD license and as such free to use and modify as long as you adhere to its terms (see the manual). Linkage to C modules and C-library functions is straightforward, so it's easy to access C from Scheme. Compiled code can be embedded into existing C programs without problems. The generated code supports full tail-recursion, first-class continuations, multiple values and dynamic-wind.
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Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.