From 8933f93439b10a7402f2c962bd5742b7902f1e38 Mon Sep 17 00:00:00 2001
From: Rose Hooper <rhooper@toybox.ca>
Date: Tue, 1 Nov 2022 11:00:48 -0400
Subject: [PATCH] simplify and use columns for boardlist

---
 ports/atmel-samd/Makefile | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/ports/atmel-samd/Makefile b/ports/atmel-samd/Makefile
index fce68d4d41..d27a048399 100644
--- a/ports/atmel-samd/Makefile
+++ b/ports/atmel-samd/Makefile
@@ -23,18 +23,20 @@
 # THE SOFTWARE.
 
 # Select the board to build for.
-define boardlist
-
-$(foreach dir,$(filter-out %.*,$(wildcard boards/*)),$(notdir $(dir)))
-
-
+define show_board_error
+boardlist =
+$(info Valid boards:)
+$(shell printf '%s\n' $(patsubst boards/%/mpconfigboard.mk,%,$(wildcard boards/*/mpconfigboard.mk)) | column -xc $$(tput cols || echo 80) 1>&2)
+$(error Rerun with $(MAKE) BOARD=<board>)
 endef
 
 ifeq ($(BOARD),)
-  $(error You must provide a BOARD parameter: $(boardlist)Rerun with $(MAKE) BOARD=<board>)
+    $(info No BOARD specified)
+    $(call show_board_error)
 else
   ifeq ($(wildcard boards/$(BOARD)/.),)
-    $(error Invalid BOARD specified)
+    $(info Invalid BOARD specified)
+    $(call show_board_error)
   endif
 endif