[libdeflate] added smiple support for libdeflate | This work was sponsored by SkySight (@plantain)

.travis.yml

@@ -91,6 +91,7 @@ matrix:
 before_install:
   - DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
   - export PATH=${DEPS_DIR}/bin:${PATH} && mkdir -p ${DEPS_DIR}
+  - make -j12 libdeflate
   - |
     if [[ ${CLANG_VERSION:-false} != false ]]; then
       export CCOMPILER='clang'

Makefile

@@ -340,3 +340,8 @@ tests/%.json: Makefile tippecanoe tippecanoe-decode
 	./tippecanoe-decode -x generator $@.check.mbtiles > $@
 	cmp $(patsubst %.check,%,$@) $@
 	rm $@.check.mbtiles
+
+libdeflate:
+	git clone https://github.com/ebiggers/libdeflate libdeflate
+	cd libdeflate/
+	make -j12 install