gnu: faust-2: Update to 2.5.23.

* gnu/packages/audio.scm (faust-2): Update to 2.5.23.
[native-inputs]: Replace llvm-with-rtti with llvm-3.8-with-rtti.
* gnu/packages/llvm.scm (llvm-with-rtti): Rename this variable...
(llvm-3.8-with-rtti): ...to this variable; inherit from llvm-3.8.

gnu/packages/audio.scm

@@ -1176,19 +1176,15 @@ PS, and DAB+.")
 (define-public faust-2
   (package
     (inherit faust)
-    (version "2.1.0")
+    (version "2.5.23")
     (source (origin
-              (method git-fetch)
-              (uri (git-reference
-                    (url "https://github.com/grame-cncm/faust.git")
-                    (commit (string-append "v"
-                                           (string-map (lambda (c)
-                                                         (if (char=? c #\.) #\- c))
-                                                       version)))))
-              (file-name (string-append "faust-" version "-checkout"))
+              (method url-fetch)
+              (uri (string-append "https://github.com/grame-cncm/faust/"
+                                  "releases/download/" version
+                                  "/faust-" version ".tar.gz"))
               (sha256
                (base32
-                "06km0ygwxxwgw1lqldccqidxhmjfz8ck0wnbd95qk5sg8sbpc068"))))
+                "1yz5jnr76hh7rmxkpdi7gyrw1wp4gyqfpq8zyl97qdi5ga5gjznq"))))
     (build-system gnu-build-system)
     (arguments
      (substitute-keyword-arguments (package-arguments faust)
@@ -1196,7 +1192,7 @@ PS, and DAB+.")
         `(list (string-append "prefix=" (assoc-ref %outputs "out"))
                "world"))))
     (native-inputs
-     `(("llvm" ,llvm-with-rtti)
+     `(("llvm" ,llvm-3.8-with-rtti)
        ("which" ,which)
        ("xxd" ,xxd)
        ("ctags" ,emacs-minimal)  ; for ctags

gnu/packages/llvm.scm

@@ -90,17 +90,6 @@ languages is in development.  The compiler infrastructure includes mirror sets
 of programming tools as well as libraries with equivalent functionality.")
     (license license:ncsa)))
 
-(define-public llvm-with-rtti
-  (package (inherit llvm)
-    (name "llvm-with-rtti")
-    (arguments
-     (substitute-keyword-arguments (package-arguments llvm)
-       ((#:configure-flags flags)
-        `(append '("-DCMAKE_SKIP_BUILD_RPATH=FALSE"
-                   "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
-                   "-DLLVM_REQUIRES_RTTI=1")
-                 ,flags))))))
-
 (define* (clang-runtime-from-llvm llvm hash
                                   #:optional (patches '()))
   (package
@@ -290,6 +279,18 @@ code analysis tools.")
        (base32
         "1ybmnid4pw2hxn12ax5qa5kl1ldfns0njg8533y3mzslvd5cx0kf"))))))
 
+;; This is for Faust 2
+(define-public llvm-3.8-with-rtti
+  (package (inherit llvm-3.8)
+    (name "llvm-with-rtti")
+    (arguments
+     (substitute-keyword-arguments (package-arguments llvm)
+       ((#:configure-flags flags)
+        `(append '("-DCMAKE_SKIP_BUILD_RPATH=FALSE"
+                   "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
+                   "-DLLVM_REQUIRES_RTTI=1")
+                 ,flags))))))
+
 (define-public clang-runtime-3.8
   (clang-runtime-from-llvm
    llvm-3.8