56/60: gnu: Add byacc-boot0.

[guix-commits]

efraim pushed a commit to branch wip-riscv-bootstrap
in repository guix.

commit c8d0fd3fdfaa387765d99fcefb240f83ff22fbab
Author: Efraim Flashner <efraim@flashner.co.il>
AuthorDate: Mon Oct 21 16:50:14 2024 +0300

    gnu: Add byacc-boot0.
    
    * gnu/packages/commencement.scm (byacc-boot0): New variable.
    
    Change-Id: I8b7e778af6b1e07bbac416dad2b2efb789dacd51
---
 gnu/packages/commencement.scm | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index deca529dcf..57c09b1b65 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -2816,6 +2816,31 @@ exec " gcc "/bin/" program
        #:validate-runpath? #f
        ,@(package-arguments file)))))
 
+(define byacc-boot0
+  (package
+    (inherit byacc)
+    (name "byacc-boot0")
+    (source (bootstrap-origin (package-source byacc)))
+    (native-inputs '())
+    (inputs
+     `(("make" ,gnu-make-boot0)
+       ,@(%bootstrap-inputs+toolchain)))
+    (propagated-inputs '())
+    (arguments
+     `(#:tests? #f
+       #:implicit-inputs? #f
+       #:guile ,%bootstrap-guile
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out  (assoc-ref outputs "out"))
+                    (bin  (string-append out "/bin"))
+                    (man1 (string-append out "/share/man/man1")))
+               (install-file "yacc" bin)
+               (symlink "yacc" (string-append bin "/byacc"))
+               (install-file "yacc.1" man1)))))))))
+
 (define gawk-boot0
   (package
     (inherit gawk)