added Travis CI integration

.travis.yml

@@ -0,0 +1,11 @@
+language: cpp
+compiler:
+  - clang
+  - gcc
+env:
+  - TARGET=build
+  - TARGET=test
+  - TARGET=preprocess
+  - TARGET=cut
+  - TARGET=assembly
+script: make -j -C ./_gnu-make $TARGET

README.md

@@ -1,5 +1,5 @@
 # PackedArray: random access array of tightly packed unsigned integers
-
+[![Build Status](https://travis-ci.org/gpakosz/PackedArray.png?branch=master)](https://travis-ci.org/gpakosz/PackedArray)
 ## TLDR
 
 *PackedArray comes to the rescue when you're in a desperate need for an uint9_t

_gnu-make/Makefile

@@ -68,7 +68,7 @@ test-$(1): build-$(1)
 preprocess: preprocess-$(1)
 preprocess-$(1): $(srcdir)/$(1).c
 	@echo Preprocessing $(1).c to $(1).pp.c
-	$$(eval tmp := $$(shell mktemp -t $(1)))
+	$$(eval tmp := $$(shell mktemp -t $(1)XXX))
 	@sed -E\
 		-e 's/#include (<|").+(>|")/pp(&)/'\
 		$(srcdir)/$(1).c > $$(tmp)