[bug#62309] [PATCH core-updates v2 1/2] opensbi: Build with default gcc, with microarch rv64g

[Josselin Poiret]

* gnu/packages/firmware.scm (make-opensbi-package): Remove specific #:xgcc for
the cross-toolchain, there is not reason for it now.  Also set the microarch to
rv64g, so that it builds.
---
 gnu/packages/firmware.scm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/firmware.scm b/gnu/packages/firmware.scm
index 956ece5d6d..0b7fff035a 100644
--- a/gnu/packages/firmware.scm
+++ b/gnu/packages/firmware.scm
@@ -486,7 +486,7 @@ (define* (make-opensbi-package platform name #:optional 
(arch "riscv64"))
     (native-inputs
      `(,@(if (and (not (string-prefix? "riscv64" (%current-system)))
                   (string-prefix? "riscv64" arch))
-           `(("cross-gcc" ,(cross-gcc "riscv64-linux-gnu" #:xgcc gcc-7))
+           `(("cross-gcc" ,(cross-gcc "riscv64-linux-gnu"))
              ("cross-binutils" ,(cross-binutils "riscv64-linux-gnu")))
            '())))
     (arguments
@@ -499,6 +499,11 @@ (define* (make-opensbi-package platform name #:optional 
(arch "riscv64"))
                                 `("CC=gcc"))
                           "FW_PAYLOAD=n"
                           "V=1")
+       ;; Direct __asm__ is used with fence.i instructions, which are not
+       ;; available in the generic riscv ISA.  We need a micro-arch with
+       ;; support for it, and rv64g is the official ISA with support for
+       ;; fence.i.
+       #:configure-flags (list "-march=rv64g")
        #:phases
        (modify-phases %standard-phases
          (delete 'configure)
-- 
2.39.2