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-rw-r--r--gnu/packages/commencement.scm48
1 files changed, 47 insertions, 1 deletions
diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index 94fcea0463..051b9cb66c 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -2702,6 +2702,50 @@ exec " gcc "/bin/" program
(inputs (%boot0-inputs))
(native-inputs '()))))
+(define libstdc++-boot0-gcc7
+ ;; GCC >= 7 is needed by architectures which use C++-14 features.
+ (let ((lib (make-libstdc++ gcc-7)))
+ (package
+ (inherit lib)
+ (source (bootstrap-origin (package-source lib)))
+ (name "libstdc++-boot0")
+ (arguments
+ `(#:guile ,%bootstrap-guile
+ #:implicit-inputs? #f
+
+ ;; XXX: libstdc++.so NEEDs ld.so for some reason.
+ #:validate-runpath? #f
+
+ ,@(substitute-keyword-arguments (package-arguments lib)
+ ((#:phases phases)
+ `(modify-phases ,phases
+ (add-after 'unpack 'unpack-gmp&co
+ (lambda* (#:key inputs #:allow-other-keys)
+ (let ((gmp (assoc-ref %build-inputs "gmp-source"))
+ (mpfr (assoc-ref %build-inputs "mpfr-source"))
+ (mpc (assoc-ref %build-inputs "mpc-source")))
+
+ ;; To reduce the set of pre-built bootstrap inputs, build
+ ;; GMP & co. from GCC.
+ (for-each (lambda (source)
+ (invoke "tar" "xvf" source))
+ (list gmp mpfr mpc))
+
+ ;; Create symlinks like `gmp' -> `gmp-x.y.z'.
+ ,@(map (lambda (lib)
+ ;; Drop trailing letters, as gmp-6.0.0a unpacks
+ ;; into gmp-6.0.0.
+ `(symlink ,(string-trim-right
+ (package-full-name lib "-")
+ char-set:letter)
+ ,(package-name lib)))
+ (list gmp-6.0 mpfr mpc))))))))))
+ (inputs `(("gmp-source" ,(bootstrap-origin (package-source gmp-6.0)))
+ ("mpfr-source" ,(bootstrap-origin (package-source mpfr)))
+ ("mpc-source" ,(bootstrap-origin (package-source mpc)))
+ ,@(%boot0-inputs)))
+ (native-inputs '()))))
+
(define gcc-boot0
(package
(inherit gcc)
@@ -2813,7 +2857,9 @@ exec " gcc "/bin/" program
("binutils-cross" ,binutils-boot0)
;; The libstdc++ that libcc1 links against.
- ("libstdc++" ,libstdc++-boot0)
+ ("libstdc++" ,(match (%current-system)
+ ("riscv64-linux" libstdc++-boot0-gcc7)
+ (_ libstdc++-boot0)))
;; Call it differently so that the builder can check whether
;; the "libc" input is #f.