[bug#49607] [PATCH 2/3] gnu: idris: Use wrap-program to define IDRIS_CC

[Attila Lendvai <attila@lendvai.name>]

Idris requires a C compiler at runtime to generate executables.

* gnu/packages/idris.scm (idris): Rename the scheme variable to idris-1.3.3 to
prepare for adding different versions later on.
[inputs]: Add Clang, and bash-minimal (for wrap-program).
[phases]: use (cc-for-target).
---
 gnu/packages/idris.scm | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/gnu/packages/idris.scm b/gnu/packages/idris.scm
index 058d679c1f..1f6e984a90 100644
--- a/gnu/packages/idris.scm
+++ b/gnu/packages/idris.scm
@@ -21,10 +21,12 @@
 
 (define-module (gnu packages idris)
   #:use-module (gnu packages)
+  #:use-module (gnu packages bash)
   #:use-module (gnu packages haskell-check)
   #:use-module (gnu packages haskell-web)
   #:use-module (gnu packages haskell-xyz)
   #:use-module (gnu packages libffi)
+  #:use-module (gnu packages llvm)
   #:use-module (gnu packages multiprecision)
   #:use-module (gnu packages ncurses)
   #:use-module (gnu packages perl)
@@ -33,9 +35,10 @@
   #:use-module (guix download)
   #:use-module (guix git-download)
   #:use-module ((guix licenses) #:prefix license:)
-  #:use-module (guix packages))
+  #:use-module (guix packages)
+  #:use-module (guix utils))
 
-(define-public idris
+(define-public idris-1.3.3
   (package
     (name "idris")
     (version "1.3.3")
@@ -51,12 +54,15 @@
     (build-system haskell-build-system)
     (native-inputs                      ;For tests
      `(("perl" ,perl)
+       ("clang" ,clang)                 ; the tests want to generate exeutables
        ("ghc-cheapskate" ,ghc-cheapskate)
        ("ghc-tasty" ,ghc-tasty)
        ("ghc-tasty-golden" ,ghc-tasty-golden)
        ("ghc-tasty-rerun" ,ghc-tasty-rerun)))
     (inputs
-     `(("gmp" ,gmp)
+     `(("bash" ,bash-minimal)
+       ("clang" ,clang) ; FIXME clang compiles faster than gcc, but (cc-for-target) ignores it
+       ("gmp" ,gmp)
        ("ncurses" ,ncurses)
        ("ghc-aeson" ,ghc-aeson)
        ("ghc-annotated-wl-pprint" ,ghc-annotated-wl-pprint)
@@ -105,7 +111,7 @@
              #t))
          (add-before 'configure 'set-cc-command
            (lambda _
-             (setenv "CC" "gcc")
+             (setenv "CC" ,(cc-for-target))
              #t))
          (add-after 'install 'fix-libs-install-location
            (lambda* (#:key outputs #:allow-other-keys)
@@ -116,14 +122,14 @@
                 (lambda (module)
                   (symlink (string-append modules "/" module)
                            (string-append lib "/" module)))
-                '("prelude" "base" "contrib" "effects" "pruviloj")))))
+                '("prelude" "base" "contrib" "effects" "pruviloj")))
+             #t))
          (delete 'check)                ;Run check later
          (add-after 'install 'check
            (lambda* (#:key outputs #:allow-other-keys #:rest args)
              (let ((out (assoc-ref outputs "out")))
                (chmod "test/scripts/timeout" #o755) ;must be executable
                (setenv "TASTY_NUM_THREADS" (number->string (parallel-job-count)))
-               (setenv "IDRIS_CC" "gcc") ;Needed for creating executables
                (setenv "PATH" (string-append out "/bin:" (getenv "PATH")))
                (apply (assoc-ref %standard-phases 'check) args))))
          (add-before 'check 'restore-libidris_rts
@@ -135,8 +141,15 @@
                    (static (assoc-ref outputs "static"))
                    (filename "/lib/idris/rts/libidris_rts.a"))
                (rename-file (string-append static filename)
-                            (string-append out filename))
-               #t))))))
+                            (string-append out filename)))
+              #t))
+         (add-before 'check 'wrap-program
+           (lambda* (#:key outputs inputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (exe (string-append out "/bin/idris")))
+               (wrap-program exe
+                 `("IDRIS_CC" = (,',(cc-for-target)))))
+             #true)))))
     (native-search-paths
      (list (search-path-specification
             (variable "IDRIS_LIBRARY_PATH")
@@ -150,6 +163,8 @@ can be specified precisely in the type.  The language is closely related to
 Epigram and Agda.")
     (license license:bsd-3)))
 
+(define-public idris idris-1.3.3)
+
 ;; Idris modules use the gnu-build-system so that the IDRIS_LIBRARY_PATH is set.
 (define (idris-default-arguments name)
   `(#:modules ((guix build gnu-build-system)
-- 
2.33.0