toolchain/buildroot: glibc does not always have native RPC

Starting with glibc-2.32, the RPC code has been removed from
glibc [0], and it is not possible anymore to enable it, even
with the --enable-obsolete-rpc configure option (which was
also removed).

riscv32 and arc both use a glibc 2.32+ so do not forcefully
enable native RPC for them.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

toolchain/toolchain-buildroot/Config.in

@@ -59,8 +59,9 @@ config BR2_TOOLCHAIN_BUILDROOT_GLIBC
 	depends on !BR2_powerpc_SPE
 	depends on BR2_RISCV_ISA_RVA || !BR2_riscv
 	select BR2_TOOLCHAIN_USES_GLIBC
-	# our glibc.mk enables RPC support
-	select BR2_TOOLCHAIN_HAS_NATIVE_RPC
+	# our glibc.mk enables RPC support, except for riscv32 and arc
+	# that don't have it anymore (glibc 2.32+)
+	select BR2_TOOLCHAIN_HAS_NATIVE_RPC if !BR2_RISCV_32 && !BR2_arc
 	help
 	  This option selects glibc as the C library for the
 	  cross-compilation toolchain.