[Buildroot] [PATCH] Config.in: disable Fortify Source for microblaze

[Romain Naour]

As reported by Toolchain-builder project [1], the system doesn't
boot when Fortify Source is enabled for glibc based toolchain
(the init process hang).

Also, hardening features may not be wanted or possible for such
slow soft-core cpus [2].

[1] https://gitlab.com/bootlin/toolchains-builder/-/jobs/1467624500
[2] http://lists.busybox.net/pipermail/buildroot/2021-June/312416.html

Signed-off-by: Romain Naour <romain.naour at gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
Cc: Giulio Benetti <giulio.benetti at benettiengineering.com>
---
With BR2_RELRO_PARTIAL enabled, the system boot.
---
 Config.in | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Config.in b/Config.in
index 2ef5d407e4..84f7fa6e8d 100644
--- a/Config.in
+++ b/Config.in
@@ -853,9 +853,16 @@ endchoice
 comment "RELocation Read Only (RELRO) needs shared libraries"
 	depends on !BR2_SHARED_LIBS
 
+config BR2_FORTIFY_SOURCE_ARCH_SUPPORTS
+	bool
+	default y
+	# Microblaze glibc toolchains don't work with Fortify Source enabled
+	depends on !BR2_microblaze
+
 choice
 	bool "Buffer-overflow Detection (FORTIFY_SOURCE)"
 	default BR2_FORTIFY_SOURCE_1
+	depends on BR2_FORTIFY_SOURCE_ARCH_SUPPORTS
 	depends on BR2_TOOLCHAIN_USES_GLIBC
 	depends on !BR2_OPTIMIZE_0
 	help
-- 
2.31.1