win8.1環境下的install時的ERR，但運行test可以完成合併任務。

[xiaoyaojones]

canvas@1.1.3 install Z:\Source\test\grunt-css-sprite-master\node_modules\sprit
esmith\node_modules\canvassmith\node_modules\canvas
node-gyp rebuild

Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\can
vassmith\node_modules\canvas>node "C:\Program Files\nodejs\node_modules\npm\bin
node-gyp-bin....\node_modules\node-gyp\bin\node-gyp.js" rebuild
在此解决方案中一次生成一个项目。若要启用并行生成，请添加“/m”开关。
CanvasRenderingContext2d.cc
CanvasPattern.cc
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\CanvasRenderin
gContext2d.cc) [Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith
\node_modules\canvassmith\node_modules\canvas\build\canvas.vcxproj]
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\CanvasPattern.
cc) [Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modul
es\canvassmith\node_modules\canvas\build\canvas.vcxproj]
color.cc
PixelArray.cc
..\src\color.cc(353): warning C4305: 'initializing' : truncation from 'double'
to 'float' [Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\nod
e_modules\canvassmith\node_modules\canvas\build\canvas.vcxproj]
..\src\color.cc(356): warning C4305: '*=' : truncation from 'double' to 'float'
[Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules
canvassmith\node_modules\canvas\build\canvas.vcxproj]
ImageData.cc
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\PixelArray.cc)
[Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules
canvassmith\node_modules\canvas\build\canvas.vcxproj]
Canvas.cc
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\ImageData.cc)
[Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\c
anvassmith\node_modules\canvas\build\canvas.vcxproj]
init.cc
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\Canvas.cc) [Z:
\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\canv
assmith\node_modules\canvas\build\canvas.vcxproj]
Image.cc
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\init.cc) [Z:\S
ource\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\canvas
smith\node_modules\canvas\build\canvas.vcxproj]
CanvasGradient.cc
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\Image.cc) [Z:
Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\canva
ssmith\node_modules\canvas\build\canvas.vcxproj]
z:\source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modules\ca
nvassmith\node_modules\canvas\src\Canvas.h(19): fatal error C1083: Cannot open
include file: 'cairo/cairo.h': No such file or directory (..\src\CanvasGradient
.cc) [Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\node_modu
les\canvassmith\node_modules\canvas\build\canvas.vcxproj]
gyp ERR! build error
gyp ERR! stack Error: C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe failed with exit code: 1
gyp ERR! stack at ChildProcess.onExit (C:\Program Files\nodejs\node_modules
npm\node_modules\node-gyp\lib\build.js:267:23)
gyp ERR! stack at ChildProcess.EventEmitter.emit (events.js:98:17)
gyp ERR! stack at Process.ChildProcess._handle.onexit (child_process.js:797:
12)
gyp ERR! System Windows_NT 6.2.9200
gyp ERR! command "node" "C:\Program Files\nodejs\node_modules\npm\node_modu
les\node-gyp\bin\node-gyp.js" "rebuild"
gyp ERR! cwd Z:\Source\test\grunt-css-sprite-master\node_modules\spritesmith\nod
e_modules\canvassmith\node_modules\canvas
gyp ERR! node -v v0.10.26
gyp ERR! node-gyp -v v0.12.2
gyp ERR! not ok

按網上的提示安裝了vs 2012，但還是提示以上錯誤，求大神指點。。

[laoshu133]

此错误不影响正常使用的，报错是因为 spritesmith 依赖在初始化时检测可用工具不存在

[xiaoyaojones]

ok，感謝您的講解~！