gnu: clang: Only install cfi_blacklist.txt for versions >= 3.8.

Fixes <https://bugs.gnu.org/42599>.
Reported by Malte Frank Gerdes <malte.f.gerdes@gmail.com>.
This is a follow-up to commit 300b7955.

* gnu/packages/llvm.scm (clang-from-llvm): Guard the 'symlink-cfi_blacklist'
phase with a version check, as it first appears in Clang 3.8.
parent ebf39606
......@@ -388,25 +388,28 @@ given PATCHES. When TOOLS-EXTRA is given, it must point to the
(("@GLIBC_LIBDIR@")
(string-append libc "/lib"))))))
#t)))
(add-after 'install 'symlink-cfi_blacklist
(lambda* (#:key inputs outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(lib-share (string-append out "/lib/clang/"
,version "/share"))
(compiler-rt (assoc-ref inputs "clang-runtime"))
;; The location varies between Clang versions.
(cfi-blacklist
(cond ((file-exists?
(string-append compiler-rt "/cfi_blacklist.txt"))
(string-append compiler-rt "/cfi_blacklist.txt"))
(else (string-append compiler-rt
"/share/cfi_blacklist.txt")))))
(mkdir-p lib-share)
;; Symlink cfi_blacklist.txt to where Clang expects
;; to find it.
(symlink cfi-blacklist
(string-append lib-share "/cfi_blacklist.txt"))
#t)))
,@(if (version>? version "3.8")
`((add-after 'install 'symlink-cfi_blacklist
(lambda* (#:key inputs outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(lib-share (string-append out "/lib/clang/"
,version "/share"))
(compiler-rt (assoc-ref inputs "clang-runtime"))
;; The location varies between Clang versions.
(cfi-blacklist
(cond
((file-exists?
(string-append compiler-rt "/cfi_blacklist.txt"))
(string-append compiler-rt "/cfi_blacklist.txt"))
(else (string-append compiler-rt
"/share/cfi_blacklist.txt")))))
(mkdir-p lib-share)
;; Symlink cfi_blacklist.txt to where Clang expects
;; to find it.
(symlink cfi-blacklist
(string-append lib-share "/cfi_blacklist.txt"))
#t))))
'())
(add-after 'install 'install-clean-up-/share/clang
(lambda* (#:key outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
......
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