[Buildroot] [git commit] arch/Config.in.x86: indicate how the CPU variants are ordered

commit: https://git.buildroot.net/buildroot/commit/?id=206ce351619e401cc7d7e53f1baad7b20d3d2da5
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

They are loosely ordered according to the ordering of the gcc
documentation. It is not entirely correct as the generic x86-64,
x86-64-v2, x86-64-v3 and x86-64-v4 are listed before i386 in the gcc
documentation, but this nevertheless gives a good explanation for the
overall ordering of the list.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <redacted>
---
 arch/Config.in.x86 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/Config.in.x86 b/arch/Config.in.x86
index cae5502051..27f2bfcd4c 100644
--- a/arch/Config.in.x86
+++ b/arch/Config.in.x86

@@ -22,6 +22,9 @@ config BR2_X86_CPU_HAS_AVX2
 config BR2_X86_CPU_HAS_AVX512
 	bool
 
+# This list of CPU architecture variant is (loosely) ordered according
+# to the gcc documentation at
+# https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/x86-Options.html
 choice
 	prompt "Target Architecture Variant"
 	default BR2_x86_i586 if BR2_i386

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