From a918deda09d0cee70e7bd725ac7ef6b60b8a12e8 Mon Sep 17 00:00:00 2001
From: Henry Weller <http://cfd.direct>
Date: Thu, 10 Dec 2020 08:24:28 +0000
Subject: [PATCH] wmake/makefiles/files: Preserve the indentation of the source
 file lines in Make/files

---
 wmake/makefiles/files | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wmake/makefiles/files b/wmake/makefiles/files
index bb5cba0946..5d99130e95 100644
--- a/wmake/makefiles/files
+++ b/wmake/makefiles/files
@@ -54,7 +54,8 @@ include $(OPTIONS)
 all : $(FILES)
 
 # Create a sed pattern from the source file suffix list
-SUFFIX_SED = $(foreach s,$(SUFFIXES),'-e s/\(^ *[^ ]*\$(s)$$\)/SOURCE += \1/')
+SUFFIX_SED = \
+    $(foreach s,$(SUFFIXES),'-e s/\(^ *\)\([^ ]*\$(s)$$\)/\1SOURCE += \2/')
 
 # Prepend SOURCE += to each of the source file names
 $(FILES): $(MAKE_DIR)/files