M1: Fix sed issue.

The MacOS sed doesn't accept semicolon termination for
commands involving defining labels or branching to labels.
This is not a new issue, but it is revealed on newer MacOS
because the sed now complains about unused labels.
In the sed command ':x; /whatever/ { ...; tx }', everything
after the initial : is interpreted as a label.

* Makefile (DEPGEN): Split the sed command's syntax up into
logical lines using multiple -e commands, applying some
formatting with indentation to try to keep it readable.
It looks like multiple -e options just glue together to
make a program, as if they were lines of code; one -e
can define a label referenced by another, and even the
closing brace can be treated as a separate command.

1 files changed, 5 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 37eb677d..521b894f 100644
--- a/Makefile
+++ b/Makefile
@@ -112,7 +112,11 @@ ABBREVN = $(if $(VERBOSE),\
 ABBREV3 = $(if $(VERBOSE),@:,@printf "%s %s -> %s\n" $(1) "$(3)" $(2))
 
 define DEPGEN
-$(V)sed ':x; /\\$$/ { N; s/\\\n//; tx }' < $(1) | \
+$(V)sed -e ':x'                                         \
+        -e '/\\$$/ {'                                   \
+        -e   'N; s/\\\n//'                              \
+        -e   'tx'                                       \
+        -e '}' < $(1) |                                 \
   sed -e '1s/^/DEP_/' -e '1s/: [^ ]\+/ :=/' > $(1:.d=.v)
 endef