From 9f2d6b72b7995d3559552661534068c6dcbc33f2 Mon Sep 17 00:00:00 2001
From: Priit Laes <plaes@plaes.org>
Date: Fri, 14 Aug 2026 00:11:50 +0300
Subject: [PATCH] build: Fix version.h race condition in parallel builds

---
 Makefile | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 9ab0da8..c59c0b7 100644
--- a/Makefile
+++ b/Makefile
@@ -92,11 +92,10 @@ html_data.c html_data.h: $(HTML) tools/output/fileadder
 	tools/output/fileadder -a $(HTML_LOCATION) -s $(IMAGESIZE) -b BANK1 -d html -p html_data
 
 $(VERSION_HEADER):
-	@echo "#ifndef VERSION_H" > $(VERSION_HEADER)
-	@echo "#define VERSION_H" >> $(VERSION_HEADER)
-	@echo "#define VERSION_SW \"$(VERSION_EXTENSION)\"" >> $(VERSION_HEADER)
-	@echo "#define BUILD_DATE \"$(BUILD_DATE)\"" >> $(VERSION_HEADER)
-	@echo "#endif" >> $(VERSION_HEADER)
+	@printf '%s\n' "#ifndef VERSION_H" "#define VERSION_H" \
+		"#define VERSION_SW \"$(VERSION_EXTENSION)\"" \
+		"#define BUILD_DATE \"$(BUILD_DATE)\"" \
+		"#endif" > $(VERSION_HEADER)
 
 httpd: html_data.h