Commit21f1cb15Recorded25 Apr 2026Repositorysigil-ffi

Extract sigil-ffi from sigil monorepo

Message

First standalone release, extracted via git filter-repo with the two-path twist that preserves vendored dyncall at vendor/dyncall/ (monorepo-root level, not inside the package dir).

Scaffolding:

  • README.md (API table + dyncall license note)
  • .gitignore (build/, .sigil/, vendor/dyncall/build/)
  • manifest.scm (gcc-toolchain + make + pkg-config)
  • dev-redirects.sgl (codeberg:sigil/sigil -> ../sigil for sigil-stdlib)

package.sgl changes:

  • version: "0.13.1" added
  • url: -> https://codeberg.org/sigil/sigil-ffi
  • sigil-stdlib swapped to from-git monorepo-resident ^0.13.1
  • c-sources / include-dirs paths rewritten ../../vendor/dyncall/... -> vendor/dyncall/... (dyncall now lives at vendor/dyncall/ relative to the extracted repo root)
  • ../sigil-lib/include + ../sigil-lib/src dropped from include-dirs
  • compile-c-sources flags wrapped in (with-sigil-c-flags ...) per procedures/sigil-package-extraction §6a (native package needs sigil-lib's include paths auto-injected)

Build clean (dyncall + dyncallback compiled, libsigil-ffi.a created, sigil/ffi.sgl compiled). Tests: 20/20 passed.

Changed
 .gitignore        |  3 +++
 README.md         | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 dev-redirects.sgl |  6 ++++++
 manifest.scm      |  7 +++++++
 package.sgl       | 69 +++++++++++++++++++++++++++++++++++----------------------------------
 sigil.lock        |  8 ++++++++
 6 files changed, 156 insertions(+), 34 deletions(-)
Diff
.gitignoreadded
@@ -0,0 +1,3 @@
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build/
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.sigil/
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vendor/dyncall/build/
README.mdadded
@@ -0,0 +1,97 @@
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# sigil-ffi
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Dynamic Foreign Function Interface for [Sigil](https://codeberg.org/sigil/sigil).
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Call C library functions from Sigil at runtime without writing glue
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code. Built on a vendored dyncall, which provides portable calling
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conventions including struct-by-value passing on every supported arch
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(x86_64, aarch64, arm32, riscv, mips, ppc, sparc, s390, …).
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## Modules
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| Module | Purpose |
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|--------------|----------------------------------------------------|
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| `(sigil ffi)`| Library load, symbol lookup, call, structs, callbacks |
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## API summary
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| Procedure | Purpose |
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|------------------------------------|----------------------------------------------|
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| `c-library` | Open a shared library by name |
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| `c-library-close` | Close a previously opened library |
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| `c-symbol` | Resolve a symbol in a library |
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| `c-function` | Bind a function with arg-types and ret-type |
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| `define-c-library` | Convenience macro for binding many functions |
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| `c-sizeof` / `c-alignof` | Query size/alignment of an FFI type |
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| `make-pointer` / `pointer-address` | Build/read raw pointer values |
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| `pointer-ref` / `pointer-set!` | Dereference a pointer at a typed offset |
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| `string->pointer` / `pointer->string` | String/pointer round-trip |
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| `pointer->bytevector` / `bytevector->pointer` | Bytevector bridge |
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| `c-alloc` / `c-free` / `with-c-alloc` | Manual memory |
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| `c-errno` / `c-strerror` | errno + strerror access |
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| `c-struct-layout` / `c-struct-ref` / `c-struct-set!` | Struct field access |
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| `c-struct->dict` / `dict->c-struct` | Struct/dict marshalling |
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| `c-callback` / `c-callback-release` | Bind a Scheme procedure as a C callback |
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FFI type constants: `ffi/void`, `ffi/bool`, `ffi/int8`..`ffi/uint64`,
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`ffi/float`, `ffi/double`, `ffi/pointer`, `ffi/string`, plus
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arch-relative `ffi/int`, `ffi/uint`, `ffi/long`, `ffi/ulong`,
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`ffi/size-t`.
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## System prerequisites
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A working C toolchain. dyncall is vendored under `vendor/dyncall/` and
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compiled in-tree; no system `libdyncall` required. Your platform must
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be one dyncall supports — see `vendor/dyncall/dyncall/README*` for the
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arch matrix.
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## Dependencies
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- sigil-stdlib
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## Build
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```sh
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sigil deps install
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sigil build
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sigil test --report
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```
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The first build compiles dyncall + dyncallback (`vendor/dyncall/`)
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plus `native/ffi.c`. Subsequent builds hit the cache.
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## Usage
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```scheme
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(import (sigil ffi))
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(define libm (c-library "libm"))
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(define cbrt (c-function libm "cbrt" (list ffi/double) ffi/double))
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(cbrt 27.0) ; => 3.0
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(define libc (c-library "libc"))
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(define getenv (c-function libc "getenv" (list ffi/string) ffi/string))
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(getenv "HOME") ; => "/home/you"
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```
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`define-c-library` collapses the bind-many-functions pattern:
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```scheme
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(import (sigil ffi))
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(define-c-library libm "libm"
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(cbrt (ffi/double) ffi/double)
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(sqrt (ffi/double) ffi/double)
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(pow (ffi/double ffi/double) ffi/double))
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(cbrt 27.0) ; => 3.0
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(pow 2.0 10.0) ; => 1024.0
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```
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## License
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BSD-3-Clause.
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Vendored dyncall (under `vendor/dyncall/`) is distributed under a
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permissive ISC-style license — see `vendor/dyncall/LICENSE`.
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sigil-ffi's own sources are BSD-3-Clause.
dev-redirects.sgladded
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;; Development redirects — point dependencies at local Sigil checkout
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(redirects
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repos: (list
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(for-repo
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url: "codeberg:sigil/sigil"
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use: (from-path dir: "../sigil"))))
manifest.scmadded
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;; sigil-ffi Development Environment
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;; Use with: guix shell -m manifest.scm
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(specifications->manifest
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'("gcc-toolchain"
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"make"
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"pkg-config"))
package.sglmodified
@@ -6,31 +6,34 @@
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(package
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name: "sigil-ffi"
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version: "0.13.1"
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description: "Dynamic foreign function interface for Sigil"
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url: "https://codeberg.org/sigil/sigil"
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url: "https://codeberg.org/sigil/sigil-ffi"
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license: "BSD-3-Clause"
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authors: (list "David Wilson <david@daviwil.com>")
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dependencies: (list
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(from-workspace name: "sigil-stdlib"))
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(from-git url: "codeberg:sigil/sigil"
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package: "sigil-stdlib"
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version: "^0.13.1"))
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;; Native library definition
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libraries: (list
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(library
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name: 'sigil-ffi
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c-sources: '("native/ffi.c"
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"../../vendor/dyncall/dyncall/dyncall_api.c"
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"../../vendor/dyncall/dyncall/dyncall_callvm.c"
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"../../vendor/dyncall/dyncall/dyncall_callvm_base.c"
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"../../vendor/dyncall/dyncall/dyncall_vector.c"
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"../../vendor/dyncall/dyncall/dyncall_callf.c"
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"../../vendor/dyncall/dyncall/dyncall_aggregate.c"
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"../../vendor/dyncall/dyncall/dyncall_call.S"
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"../../vendor/dyncall/dyncallback/dyncall_callback.c"
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"../../vendor/dyncall/dyncallback/dyncall_thunk.c"
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"../../vendor/dyncall/dyncallback/dyncall_args.c"
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"../../vendor/dyncall/dyncallback/dyncall_alloc_wx.c"
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"../../vendor/dyncall/dyncallback/dyncall_callback_arch.S")
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"vendor/dyncall/dyncall/dyncall_api.c"
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"vendor/dyncall/dyncall/dyncall_callvm.c"
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"vendor/dyncall/dyncall/dyncall_callvm_base.c"
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"vendor/dyncall/dyncall/dyncall_vector.c"
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"vendor/dyncall/dyncall/dyncall_callf.c"
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"vendor/dyncall/dyncall/dyncall_aggregate.c"
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"vendor/dyncall/dyncall/dyncall_call.S"
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"vendor/dyncall/dyncallback/dyncall_callback.c"
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"vendor/dyncall/dyncallback/dyncall_thunk.c"
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"vendor/dyncall/dyncallback/dyncall_args.c"
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"vendor/dyncall/dyncallback/dyncall_alloc_wx.c"
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"vendor/dyncall/dyncallback/dyncall_callback_arch.S")
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native-init: "sigil__init_sigil_ffi_module"))
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tasks: (list
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;; Compile FFI native code + vendored dyncall
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(compile-c-sources
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sources: '("native/ffi.c"
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"../../vendor/dyncall/dyncall/dyncall_api.c"
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"../../vendor/dyncall/dyncall/dyncall_callvm.c"
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"../../vendor/dyncall/dyncall/dyncall_callvm_base.c"
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"../../vendor/dyncall/dyncall/dyncall_vector.c"
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"../../vendor/dyncall/dyncall/dyncall_callf.c"
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"../../vendor/dyncall/dyncall/dyncall_aggregate.c"
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"../../vendor/dyncall/dyncall/dyncall_call.S"
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"../../vendor/dyncall/dyncallback/dyncall_callback.c"
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"../../vendor/dyncall/dyncallback/dyncall_thunk.c"
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"../../vendor/dyncall/dyncallback/dyncall_args.c"
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"../../vendor/dyncall/dyncallback/dyncall_alloc_wx.c"
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"../../vendor/dyncall/dyncallback/dyncall_callback_arch.S")
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include-dirs: '("../sigil-lib/include"
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"../sigil-lib/src"
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"../../vendor/dyncall/dyncall"
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"../../vendor/dyncall/dyncallback")
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flags: '("-std=c99"
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"-Wall" "-Wextra"
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"-Wno-unused-parameter"
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"-D_GNU_SOURCE"))
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"vendor/dyncall/dyncall/dyncall_api.c"
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"vendor/dyncall/dyncall/dyncall_callvm.c"
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"vendor/dyncall/dyncall/dyncall_callvm_base.c"
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"vendor/dyncall/dyncall/dyncall_vector.c"
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"vendor/dyncall/dyncall/dyncall_callf.c"
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"vendor/dyncall/dyncall/dyncall_aggregate.c"
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"vendor/dyncall/dyncall/dyncall_call.S"
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"vendor/dyncall/dyncallback/dyncall_callback.c"
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"vendor/dyncall/dyncallback/dyncall_thunk.c"
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"vendor/dyncall/dyncallback/dyncall_args.c"
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"vendor/dyncall/dyncallback/dyncall_alloc_wx.c"
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"vendor/dyncall/dyncallback/dyncall_callback_arch.S")
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include-dirs: '("vendor/dyncall/dyncall"
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"vendor/dyncall/dyncallback")
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flags: (with-sigil-c-flags '("-std=c99"
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"-Wall" "-Wextra"
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"-Wno-unused-parameter"
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"-D_GNU_SOURCE")))
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;; Create static library
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(create-static-library
sigil.lockadded
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;; Auto-generated by sigil deps install. Do not edit.
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(lock
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(package name: "sigil-stdlib"
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url: "codeberg:sigil/sigil"
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ref: "^0.13.1"
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sha: "1aea1cecd3487bf07d071da2c1e7eb3cf4bbdb21"
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package-selector: "sigil-stdlib")
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)