add r7rs-pffi example

2 files changed, 83 insertions, 9 deletions

diff --git a/examples/hello-world.scm b/examples/hello-world.scm
index 19790d7..29ca55f 100644
--- a/examples/hello-world.scm
+++ b/examples/hello-world.scm
@@ -30,12 +30,3 @@
  (build-system chibi-scheme-build-system)
  (inputs (list chibi-scheme-with-path)))
 
-#;(pure-chibi-scheme-library (chibi/search-path)
-                           "hello-world"
-                           "1.0"
-                           "Prints hello world"
-                           "Prints hello world"
-                           asl2.0
-                           "https://example.com"
-                           "hello-world")
-
diff --git a/examples/pffi.scm b/examples/pffi.scm
new file mode 100644
index 0000000..e68224d
--- /dev/null
+++ b/examples/pffi.scm
@@ -0,0 +1,83 @@
+#| Copyright (C) 2025 Peter McGoron
+ |
+ | This program is free software: you can redistribute it and/or modify it
+ | under the terms of the GNU General Public License as published by the
+ | Free Software Foundation, either version 3 of the License, or (at your
+ | option) any later version.
+ |
+ | This program is distributed in the hope that it will be useful, but
+ | WITHOUT ANY WARRANTY; without even the implied warranty of
+ | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ | General Public License for more details.
+ |
+ | You should have received a copy of the GNU General Public License along
+ | with this program.  If not, see <https://www.gnu.org/licenses/>.
+ |#
+
+(use-modules (mcgoron guix chibi)
+             (gnu packages libffi)
+             (gnu packages commencement)
+             (gnu packages base)
+             (guix git-download)
+             (guix build-system gnu)
+             (guix packages)
+             (guix gexp)
+             (guix licenses))
+
+(package
+ (name "pffi-chibi")
+ (version "0.5.0")
+ (synopsis "Portable Foreign Function Interface for R7RS")
+ (description "Portable Foreign Function Interface for R7RS")
+ (license lgpl3+)
+ (home-page "https://sr.ht/~retropikzel/r7rs-pffi")
+ (source
+  (origin
+   (method git-fetch)
+   (uri (git-reference
+         (url "https://git.sr.ht/~retropikzel/r7rs-pffi/")
+         (commit "v0.5.0")))
+   (file-name (git-file-name "r7rs-pffi" version))
+   (sha256
+    (base32 "1ggkafggyqqla6ba8dlhzvvf6v7i6scpa2xyr1mfxxy8iwnl70aa"))))
+ (build-system gnu-build-system)
+ (inputs (list chibi-scheme-with-path libffi))
+ (native-inputs (list gcc-toolchain glibc))
+ (arguments
+  `(#:phases
+    (modify-phases %standard-phases
+      (delete 'configure)
+      (replace 'build
+        (lambda* (#:key outputs #:allow-other-keys)
+          (invoke "chibi-ffi"
+                  "retropikzel/r7rs-pffi/r7rs-pffi-chibi.stub")
+          (invoke "gcc"
+                  "-o"
+                  "retropikzel/r7rs-pffi/r7rs-pffi-chibi.so"
+                  "-fPIC"
+                  "-shared"
+                  "retropikzel/r7rs-pffi/r7rs-pffi-chibi.c"
+                  "-lchibi-scheme"
+                  "-lffi")))
+      (replace 'check
+        (lambda* (#:key (test-target "check") (tests? #t) #:allow-other-keys)
+          (display "tests don't work yet\n")
+          #;(when tests?
+              (invoke "chibi-scheme" "-A" "." "test.scm"))))
+      (replace 'install
+        (lambda* (#:key outputs #:allow-other-keys)
+          (let* ((out (assoc-ref outputs "out"))
+                 (base-dir (string-append out
+                                          "/share/guix-chibi/retropikzel/"))
+                 (copy (lambda (name)
+                         (invoke "cp"
+                                 (string-append "retropikzel/" name)
+                                 (string-append base-dir name)))))
+            (invoke "mkdir" "-p" (string-append base-dir "/r7rs-pffi"))
+            (for-each copy
+                      '("r7rs-pffi.sld"
+                        "r7rs-pffi/r7rs-pffi-chibi.so"
+                        "r7rs-pffi/chibi.scm"
+                        "r7rs-pffi/main.scm"
+                        "r7rs-pffi/struct.scm")))))))))
+