From 017e4b69900445e101a02f21e6d3438992fdd43b Mon Sep 17 00:00:00 2001
From: Alex Shinn <alexshinn@gmail.com>
Date: Thu, 16 May 2024 23:28:29 +0900
Subject: [PATCH] Add feature for architecture.

Issue #955.
---
 Makefile        | 1 +
 Makefile.detect | 4 ++++
 sexp.c          | 1 +
 3 files changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index d62915dc..e2bed677 100644
--- a/Makefile
+++ b/Makefile
@@ -94,6 +94,7 @@ include/chibi/install.h: Makefile.libs Makefile.detect
 	echo '#define sexp_so_extension "'$(SO)'"' > $@
 	echo '#define sexp_default_module_path "'$(MODDIR):$(BINMODDIR):$(SNOWMODDIR):$(SNOWBINMODDIR)'"' >> $@
 	echo '#define sexp_platform "'$(PLATFORM)'"' >> $@
+	echo '#define sexp_architecture "'$(ARCH)'"' >> $@
 	echo '#define sexp_version "'$(CHIBI_VERSION)'"' >> $@
 	echo '#define sexp_release_name "'`cat RELEASE`'"' >> $@
 
diff --git a/Makefile.detect b/Makefile.detect
index 73d8cd7c..9ec850cb 100644
--- a/Makefile.detect
+++ b/Makefile.detect
@@ -52,6 +52,10 @@ endif
 endif
 endif
 
+ifndef ARCH
+ARCH = $(shell uname -m)
+endif
+
 ########################################################################
 # Set default variables for the platform.
 
diff --git a/sexp.c b/sexp.c
index a886513c..09bbb5ac 100644
--- a/sexp.c
+++ b/sexp.c
@@ -460,6 +460,7 @@ sexp sexp_finalize_c_type (sexp ctx, sexp self, sexp_sint_t n, sexp obj) {
 /****************************** contexts ******************************/
 
 static const char* sexp_initial_features[] = {
+  sexp_architecture,
   sexp_platform,
 #if SEXP_BSD
   "bsd",