添加tslib到directfb

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前面配置Ddirectfb1.2.7支持tslib一直不行，然后试了，配置问题

编译tslib

./configure --host=arm-none-linux-gnueabi --prefix=/gzz/cross_compile/SDL --enable-shared=yes CFLAGS="-I/gzz/cross_compile/SDL/include" LDFLAGS="-L/gzz/cross_compile/SDL/lib"

make ;make install

编译directfb

export TSLIB_CFLAGS="-I/gzz/cross_compile/SDL/include"

export TSLIB_LIBS="-L/gzz/cross_compile/SDL/lib -lts"
这俩句很关键

./configure --host=arm-none-linux-gnueabi --prefix=/gzz/cross_compile/SDL --disable-x11 --disable-debug -disable-voodoo -disable-mmx --disable-see --disable-debug-support --disable-osx --disable-text --disable-network --enable-sdl --enable-jpeg --enable-zlib --enable-png --disable-gif --enable-freetype --disable-video4linux --disable-video4linux2 --with-gfxdrivers=none --with-inputdrivers=tslib CFLAGS="-I/gzz/cross_compile/SDL/include" LDFLAGS="-L/gzz/cross_compile/SDL/lib -lfreetype -ljpeg -lz -lts"
make ;make install;

成功

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