build-system/cargo: Set libclang environment variable when available.

* guix/build/cargo-build-system.scm (configure): When clang is available
in the build environment set the LIBCLANG_PATH variable.
* gnu/packages/crates-graphics.scm (rust-aom-sys-0.1,
uust-dav1d-sys-0.3),
* gnu/packages/crates-io.scm (rust-bindgen-0.55, rust-bindgen-0.54,
rust-bindgen-0.53, rust-bindgen-0.52, rust-cexpr-0.4, rust-cexpr-0.3,
rust-cexpr-0.2, rust-clang-sys-1, rust-clang-sys-0.29,
rust-clang-sys-0.26, rust-clang-sys-0.22, rust-clang-sys-0.11,
rust-libpijul-0.12, rust-nettle-7, rust-nettle-sys-2,
rust-sequoia-openpgp-0.9)[arguments]: Remove phases which set an
environment variable to find clang.
[inputs]: Rename instances of libclang with clang.

1 files changed, 6 insertions, 21 deletions

diff --git a/gnu/packages/crates-graphics.scm b/gnu/packages/crates-graphics.scm
index 9193479092..11bdd4c4f4 100644
--- a/gnu/packages/crates-graphics.scm
+++ b/gnu/packages/crates-graphics.scm
@@ -183,20 +183,12 @@ text or blue underlined text, on ANSI terminals.")
     (arguments
      `(#:cargo-inputs
        (("rust-bindgen" ,rust-bindgen-0.53)
-        ("rust-metadeps" ,rust-metadeps-1.1))
-       #:phases
-       (modify-phases %standard-phases
-         (add-after 'unpack 'set-environmental-variable
-           (lambda* (#:key inputs #:allow-other-keys)
-             (let ((clang (assoc-ref inputs "libclang")))
-               (setenv "LIBCLANG_PATH"
-                       (string-append clang "/lib")))
-             #t)))))
+        ("rust-metadeps" ,rust-metadeps-1.1))))
     (native-inputs
      `(("pkg-config" ,pkg-config)))
     (inputs
      `(("libaom" ,libaom)
-       ("libclang" ,clang)
+       ("clang" ,clang)
        ("llvm" ,llvm)))
     (home-page "https://github.com/rust-av/aom-rs")
     (synopsis "FFI bindings to aom")
@@ -402,19 +394,12 @@ for computer graphics.")
     (arguments
      `(#:cargo-inputs
        (("rust-bindgen" ,rust-bindgen-0.54)
-        ("rust-metadeps" ,rust-metadeps-1.1))
-       #:phases
-       (modify-phases %standard-phases
-         (add-after 'unpack 'set-environmental-variable
-           (lambda* (#:key inputs #:allow-other-keys)
-             (let ((clang (assoc-ref inputs "libclang")))
-               (setenv "LIBCLANG_PATH"
-                       (string-append clang "/lib")))
-             #t)))))
+        ("rust-metadeps" ,rust-metadeps-1.1))))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
     (inputs
      `(("dav1d" ,dav1d)
-       ("pkg-config" ,pkg-config)
-       ("libclang" ,clang)
+       ("clang" ,clang)
        ("llvm" ,llvm)))
     (home-page "https://github.com/rust-av/dav1d-rs")
     (synopsis "FFI bindings to dav1d")