[PATCH] build: riscv is not a valid -march value

[christian.ehrhardt@canonical.com]

From: Christian Ehrhardt <christian.ehrhardt@canonical.com>

If building riscv natively with -Dplatform=generic config/meson.build
will select cpu_instruction_set=riscv.

That was fine because config/riscv/meson.build did override it to valid
values later, but since b7676fcccab4 ("config: verify machine arch
flag") it will break the build as it tries to test -march=riscv which
is not a value value.

The generic setting used in most cases is rv64gc, set this here
as well.

Fixes: b7676fcccab4 ("config: verify machine arch flag"
Fixes: f22e705ebf12 ("eal/riscv: support RISC-V architecture")

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
---
 config/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/meson.build b/config/meson.build
index d732154731..a9ccd56deb 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -152,7 +152,7 @@ if cpu_instruction_set == 'generic'
     elif host_machine.cpu_family().startswith('ppc')
         cpu_instruction_set = 'power8'
     elif host_machine.cpu_family().startswith('riscv')
-        cpu_instruction_set = 'riscv'
+        cpu_instruction_set = 'rv64gc'
     endif
 endif
 
-- 
2.34.1