From d0b69c9376dc06e36803486e83911510e02e0a3b Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Fri, 22 Feb 2013 11:33:10 -0500
Subject: [PATCH] Makefile: Use the more portable printf over `echo -e`

See POSIX-2008 for details:

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/printf.html
---
 Makefile | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/Makefile b/Makefile
index ec3bc3e..45ccbba 100644
--- a/Makefile
+++ b/Makefile
@@ -145,23 +145,23 @@ run: angle-vs-y0.png time-vs-y0.png trajectories.png \
 
 .SECONDEXPANSION:
 final-vs-y0.data: scatter
-	echo -e "# y0\ttime\tangle\tenergy" > "$@"
+	printf "# y0\ttime\tangle\tenergy\n" > "$@"
 	for y0 in $$(seq 0 0.0008 0.8); do \
-		echo -en "$$y0\t" >> "$@"; \
+		printf "%s\t" "$$y0" >> "$@"; \
 		./scatter --y0 "$$y0" --final >> "$@"; \
 	done
 
 .SECONDEXPANSION:
 final-vs-y0-zoom.data: scatter
-	echo -e "# y0\ttime\tangle\tenergy" > "$@"
+	printf "# y0\ttime\tangle\tenergy\n" > "$@"
 	for y0 in $$(seq 0.2772 0.0000008 0.2780); do \
-		echo -en "$$y0\t" >> "$@"; \
+		printf "%s\t" "$$y" >> "$@"; \
 		./scatter --y0 "$$y0" --final >> "$@"; \
 	done
 
 .SECONDEXPANSION:
 trajectories.data: scatter
-	echo -e "# t\tx\ty\tv_x\tv_y\tenergy" > "$@"
+	printf "# time\tx\ty\tv_x\tv_y\tenergy\n" > "$@"
 	for y0 in 0.024 0.0312 0.277672 0.277776 0.2784 0.3024; do \
 		./scatter --y0 "$$y0" >> "$@"; \
 		echo '' >> "$@"; \
@@ -172,10 +172,10 @@ trajectories.data: scatter
 #		for E in $$(seq 0.1 0.00107421875 1.2); do 
 .SECONDEXPANSION:
 final-vs-y0-E.data: scatter
-	echo -e "# y0\tinitial energy\ttime\tangle\tenergy" > "$@"
+	printf "# y0\tinitial energy\ttime\tangle\tenergy\n" > "$@"
 	for y0 in $$(seq 0.0 0.1 0.8); do \
 		for E in $$(seq 0.1 0.1 1.2); do \
-			echo -en "$$y0\t$$E\t" >> "$@"; \
+			printf "%s\t%s\t" "$$y0" "$$E" >> "$@"; \
 			./scatter --y0 "$$y0" --vx0-energy "$$E" --final >> "$@"; \
 		done \
 	done
-- 
2.26.2