========================================================================
usage:

1. configure
    make config|f [PLAT=ios|android|linux|mac|mingw|cygwin] [ARCH=x86|x64|armv5te|armv6|armv7|armv7s|arm64] [DEBUG=y|n] [SMALL=y|n] [DEMO=y|n] [PROF=y|n] [PREFIX=..] [BIN=] [PRE=] [SDK=]

2. build
    make [all]
    make rebuild|r

3. update build
    make update|u

4. clean build
    make clean|c

5. install
    make install|i

6. make info
    make error|e
    make output|o
    make warning|w

7. make document
    make doc|d

8. help
    make help|h