test-amalgamation: use a single cat command

Use the list of prerequisites instead of listing those files manually,
this way they will never fall out of sync.

Also update the amalgamation example to use a single cat command.

Fixes: a7e8d394 ("[amalgamation] add test")
Fixes: b192c86b ("[amalgamation] lz4frame.c")

diff --git a/lib/README.md b/lib/README.md
index b753195..cf1505f 100644 (file)
--- a/lib/README.md
+++ b/lib/README.md
@@ -74,9 +74,7 @@ The following build macro can be selected at compilation time :
 lz4 source code can be amalgamated into a single file.
 One can combine all source code into `lz4_all.c` by using following command:
 ```
-cat lz4.c > lz4_all.c
-cat lz4hc.c >> lz4_all.c
-cat lz4frame.c >> lz4_all.c
+cat lz4.c lz4hc.c lz4frame.c > lz4_all.c
 ```
 (`cat` file order is important) then compile `lz4_all.c`.
 All `*.h` files present in `/lib` remain necessary to compile `lz4_all.c`.

diff --git a/tests/Makefile b/tests/Makefile
index bcaf603..f327535 100644 (file)
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -158,9 +158,7 @@ test32: test
 
 .PHONY: test-amalgamation
 test-amalgamation: $(LZ4DIR)/lz4.c $(LZ4DIR)/lz4hc.c $(LZ4DIR)/lz4frame.c
-       cat $(LZ4DIR)/lz4.c > lz4_all.c
-       cat $(LZ4DIR)/lz4hc.c >> lz4_all.c
-       cat $(LZ4DIR)/lz4frame.c >> lz4_all.c
+       cat $^ > lz4_all.c
        $(CC) -I$(LZ4DIR) -c lz4_all.c
        $(RM) lz4_all.c