找不到Pixman - Cmake错误

Question

我正在用cmake Gui构建Cairo。 当我打 '配置'，CMake的是显示以下错误：

Could NOT find PIXMAN, try to set the path to PIXMAN root folder in the system variable PIXMAN (missing: PIXMAN_LIBRARIES PIXMAN_INCLUDE_DIRS)
Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
CMake Error at C:/cmake-3.7.0-rc1-win32-x86/share/cmake-3.7/Modules/FindPackageHandleStandardArgs.cmake:138 (message):
Could NOT find PNG (missing: PNG_LIBRARY PNG_PNG_INCLUDE_DIR)
Call Stack (most recent call first):
C:/cmake-3.7.0-rc1-win32-x86/share/cmake-3.7/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
C:/cmake-3.7.0-rc1-win32-x86/share/cmake-3.7/Modules/FindPNG.cmake:146 (find_package_handle_standard_args)
CMakeLists.txt:7 (find_package)

我已经下载的zlib，libpng的，Pixman源文件。 在哪里放置这些文件？ 我觉得FindPixaman.cmake文件需要修改：

# PIXMAN_ROOT_DIR - Set this variable to the root installation of PIXMAN 

如何设置的PIXMAN_ROOT_DIR路径安装根？

Answer 1

I think FindPixaman.cmake file needs to be modified

您不应该修改包文件。你应该做的是设置在您的CMake项目的可变PIXMAN_ROOT_DIR调用find_package之前，所以包装就知道到哪里去寻找：

set(PIXMAN_ROOT_DIR /path/to/pixman) 

哪里/path/to/pixman是安装pixman的目录。查看package file，它应该包含子目录include和lib分别包含pixman.h和编译的库。

：

另外，您可以使用按钮Add entry在GUI设置PIXMAN_ROOT_DIR