arch/sparc: disable internal toolchain backend for sparc

Since gcc 11 [1] the sparc architecture is disabled since
it produce a non working image. Buildroot now provide gcc
13.x, 12.x and 11.x and we are going to remove gcc 10
that was the last working release (thanks to a local patch).

We have to disable the internal toolchain backend for sparc
before removing gcc 10. While at it, remove !BR2_sparc
dependency for gcc 11.x, 12.x and 13.x.

[1] 2ab88dac293aed5adf2504e8b182f9d8a306b935

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

arch/Config.in

@@ -216,6 +216,11 @@ config BR2_sh
 config BR2_sparc
 	bool "SPARC"
 	select BR2_USE_MMU
+	# uClibc-ng broken on sparc due to recent gcc changes
+	# that need to be reverted since gcc 8.4, 9.3 and 10.1.
+	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98784
+	# gcc <= 10.x has been removed from Buildroot.
+	select BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
 	help
 	  SPARC (from Scalable Processor Architecture) is a RISC
 	  instruction set architecture (ISA) developed by Sun

package/gcc/Config.in.host

@@ -38,10 +38,6 @@ config BR2_GCC_VERSION_11_X
 	# powerpc spe support has been deprecated since gcc 8.x.
 	# https://gcc.gnu.org/ml/gcc/2018-04/msg00102.html
 	depends on !BR2_powerpc_SPE
-	# uClibc-ng broken on sparc due to recent gcc changes
-	# that need to be reverted since gcc 8.4, 9.3 and 10.1.
-	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98784
-	depends on !BR2_sparc
 	# ARC HS48 rel 31 only supported by gcc arc fork.
 	depends on !BR2_archs4x_rel31
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_11
@@ -52,10 +48,6 @@ config BR2_GCC_VERSION_12_X
 	# powerpc spe support has been deprecated since gcc 8.x.
 	# https://gcc.gnu.org/ml/gcc/2018-04/msg00102.html
 	depends on !BR2_powerpc_SPE
-	# uClibc-ng broken on sparc due to recent gcc changes
-	# that need to be reverted since gcc 8.4, 9.3 and 10.1.
-	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98784
-	depends on !BR2_sparc
 	# ARC HS48 rel 31 only supported by gcc arc fork.
 	depends on !BR2_archs4x_rel31
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_12
@@ -65,10 +57,6 @@ config BR2_GCC_VERSION_13_X
 	# powerpc spe support has been deprecated since gcc 8.x.
 	# https://gcc.gnu.org/ml/gcc/2018-04/msg00102.html
 	depends on !BR2_powerpc_SPE
-	# uClibc-ng broken on sparc due to recent gcc changes
-	# that need to be reverted since gcc 8.4, 9.3 and 10.1.
-	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98784
-	depends on !BR2_sparc
 	# ARC HS48 rel 31 only supported by gcc arc fork.
 	depends on !BR2_archs4x_rel31
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_13