gnu: make-bootstrap: Build with GCC 11 instead of GCC 7.

This fixes a glibc-for-bootstrap build issue on aarch64-linux.

* gnu/packages/make-bootstrap.scm (glibc-for-bootstrap)[native-inputs]:
Remove.
(gcc-for-bootstrap, package-with-relocatable-glibc)
(%gcc-static, %gcc-stripped): Depend on ‘gcc’ instead of ‘gcc-7’.

Reported-by: Ricardo Wurmus <rekado@elephly.net>
Change-Id: Ia7f62f9674873087aa20a9d7da8d25d94b215e5c

gnu/packages/make-bootstrap.scm

@@ -87,12 +87,6 @@ (define glibc-for-bootstrap
                   "--enable-static-nss"
                   ,flags))))
 
-      ;; Make sure to build glibc with the same compiler version as the rest
-      ;; of the bootstrap.  Otherwise it fails to statically link on aarch64.
-      (native-inputs
-       `(("gcc" ,gcc-7)
-         ,@(package-native-inputs base)))
-
       ;; Remove the 'debug' output to allow bit-reproducible builds (when the
       ;; 'debug' output is used, ELF files end up with a .gnu_debuglink, which
       ;; includes a CRC of the corresponding debugging symbols; those symbols
@@ -103,13 +97,13 @@ (define gcc-for-bootstrap
   (mlambdaq (glibc)
     "Return a variant of GCC that uses the bootstrap variant of GLIBC."
     (package
-      (inherit gcc-7)
+      (inherit gcc)
       (outputs '("out")) ;all in one so libgcc_s is easily found
       (inputs
        `( ;; Distinguish the name so we can refer to it below.
          ("bootstrap-libc" ,(glibc-for-bootstrap glibc))
          ("libc:static" ,(glibc-for-bootstrap glibc) "static")
-         ,@(package-inputs gcc-7))))))
+         ,@(package-inputs gcc))))))
 
 (define (package-with-relocatable-glibc p)
   "Return a variant of P that uses the libc as defined by
@@ -148,7 +142,7 @@ (define (native-inputs)
                              (cons (search-path-specification
                                     (variable "CROSS_CPLUS_INCLUDE_PATH")
                                     (files '("include")))
-                                   (package-search-paths gcc-7)))))
+                                   (package-search-paths gcc)))))
             ("cross-binutils" ,(cross-binutils target))
             ,@(%final-inputs)))
         `(("libc" ,(glibc-for-bootstrap glibc))
@@ -472,11 +466,11 @@ (define (%glibc-stripped)
 (define %gcc-static
   ;; A statically-linked GCC, with stripped-down functionality.
   (package-with-relocatable-glibc
-   (package (inherit gcc-7)
+   (package (inherit gcc)
      (name "gcc-static")
      (outputs '("out"))                           ; all in one
      (arguments
-      (substitute-keyword-arguments (package-arguments gcc-7)
+      (substitute-keyword-arguments (package-arguments gcc)
         ((#:modules modules %default-gnu-modules)
          `((srfi srfi-1)
            (srfi srfi-26)
@@ -527,7 +521,7 @@ (define %gcc-static
      (inputs
       `(("zlib:static" ,zlib "static")
         ("isl:static" ,isl "static")
-        ,@(package-inputs gcc-7)))
+        ,@(package-inputs gcc)))
      (native-inputs
       (if (%current-target-system)
           `(;; When doing a Canadian cross, we need GMP/MPFR/MPC both
@@ -540,13 +534,13 @@ (define %gcc-static
             ("gmp-native" ,gmp)
             ("mpfr-native" ,mpfr)
             ("mpc-native" ,mpc)
-            ,@(package-native-inputs gcc-7))
+            ,@(package-native-inputs gcc))
-          (package-native-inputs gcc-7))))))
+          (package-native-inputs gcc))))))
 
 (define %gcc-stripped
   ;; The subset of GCC files needed for bootstrap.
   (package
-    (inherit gcc-7)
+    (inherit gcc)
     (name "gcc-stripped")
     (build-system trivial-build-system)
     (source #f)