package/gcc: disallow Fortran on gcc 12/13 on Microblaze

The build of gcc with Fortran support is broken on gcc 12.x and gcc
13.x, it fails with:

../../../libgfortran/generated/bessel_r8.c: In function 'bessel_yn_r8':
../../../libgfortran/generated/bessel_r8.c:178:1: internal compiler error: in gen_reg_rtx, at emit-rtl.cc:1167

This issue has been fixed in gcc 14.x, which builds a Microblaze
Fortran-capable toolchain successfully.

Since we're not really interested in figuring out the commit that
fixed the problem, let's simply disallow the selection of Fortran with
gcc12/13 on Microblaze.

Fixes:

  http://autobuild.buildroot.net/results/5b4eee1d9b119c9f923f9518618f45a6482ddc85/

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

package/gcc/Config.in.host

@@ -103,6 +103,10 @@ config BR2_TOOLCHAIN_BUILDROOT_FORTRAN
 	# on architecture building libquadmath, wchar is required
 	depends on !BR2_TOOLCHAIN_HAS_LIBQUADMATH || \
 		(BR2_TOOLCHAIN_HAS_LIBQUADMATH && BR2_USE_WCHAR)
+	# internal compiler error: in gen_reg_rtx, at emit-rtl.cc:1167
+	# fixed in gcc 14.x, so disable gcc 12.x/13.x
+	depends on !(BR2_microblaze && \
+		(BR2_GCC_VERSION_12_X || BR2_GCC_VERSION_13_X))
 	select BR2_TOOLCHAIN_HAS_FORTRAN
 	help
 	  Enable this option if you want your toolchain to support the