From 68b7bb1a062c6471b678d5488a71324e0486d405 Mon Sep 17 00:00:00 2001
From: Valentin Gagarin <valentin.gagarin@tweag.io>
Date: Thu, 11 May 2023 15:51:48 +0200
Subject: [PATCH] add information on the system type string

---
 configure.ac | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index bb3f92e4d..26df39d54 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,7 +5,12 @@ AC_CONFIG_AUX_DIR(config)
 
 AC_PROG_SED
 
-# Construct a Nix system name (like "i686-linux").
+# Construct a Nix system name (like "i686-linux"):
+# https://www.gnu.org/software/autoconf/manual/html_node/Canonicalizing.html#index-AC_005fCANONICAL_005fHOST-1
+# The inital value is produced by the `config.guess` script:
+# https://git.savannah.gnu.org/cgit/config.git/tree/config.guess
+# It has the following form, which is not documented anywhere:
+# <cpu>-<vendor>-<os>[<version>][-<abi>]
 AC_CANONICAL_HOST
 AC_MSG_CHECKING([for the canonical Nix system name])