From da9f07ce054c7af5061279c3d237fd64d63d9f9b Mon Sep 17 00:00:00 2001
From: Sam Clegg <sbc@chromium.org>
Date: Wed, 9 Mar 2022 07:40:04 +0000
Subject: Improve wasm2c example update process. NFC (#1857)

Followup to #1851.
---
 Makefile                       |  1 +
 wasm2c/examples/fac/Makefile   | 12 ++++++++++--
 wasm2c/examples/rot13/Makefile | 14 +++++++++++---
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 05194a88..7915598b 100644
--- a/Makefile
+++ b/Makefile
@@ -146,6 +146,7 @@ src/prebuilt/lexer-keywords.cc: src/lexer-keywords.txt
 
 .PHONY: update-wasm2c
 update-wasm2c: src/prebuilt/wasm2c.include.c src/prebuilt/wasm2c.include.h
+	make -C wasm2c/examples/fac
 
 src/prebuilt/wasm2c.include.c: src/wasm2c.c.tmpl
 	src/wasm2c_tmpl.py -o $@ $<
diff --git a/wasm2c/examples/fac/Makefile b/wasm2c/examples/fac/Makefile
index f5b2a338..caf32e24 100644
--- a/wasm2c/examples/fac/Makefile
+++ b/wasm2c/examples/fac/Makefile
@@ -1,9 +1,17 @@
 # Use implicit rules for compiling C files.
 CFLAGS=-I../..
+
+all: fac
+
+clean:
+	rm -rf fac fac.wasm fac.c *.o
+
 fac: main.o fac.o ../../wasm-rt-impl.o
 
-fac.wasm: fac.wat
+fac.wasm: fac.wat ../../../bin/wat2wasm
 	../../../bin/wat2wasm $< -o $@
 
-fac.c: fac.wasm
+fac.c: fac.wasm ../../../bin/wasm2c
 	../../../bin/wasm2c $< -o $@
+
+.PHONY: all clean
diff --git a/wasm2c/examples/rot13/Makefile b/wasm2c/examples/rot13/Makefile
index 35483310..b58db6be 100644
--- a/wasm2c/examples/rot13/Makefile
+++ b/wasm2c/examples/rot13/Makefile
@@ -1,9 +1,17 @@
 # Use implicit rules for compiling C files.
 CFLAGS=-I../..
-rot13: main.o rot13.o ../../wasm-rt-impl.o
 
-rot13.wasm: rot13.wat
+all: rot13
+
+clean:
+	rm -rf rot13 rot13.wasm rot13.c *.o
+
+rot13: main.o rot13.o ../../wasm-rt-impl.o ../../wasm-rt-os-unix.o -lm
+
+rot13.wasm: rot13.wat ../../../bin/wat2wasm
 	../../../bin/wat2wasm $< -o $@
 
-rot13.c: rot13.wasm
+rot13.c: rot13.wasm ../../../bin/wasm2c
 	../../../bin/wasm2c $< -o $@
+
+.PHONY: all clean
-- 
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