需要帮助在 mac os x 上安装 python 包 autopy - libpng 和 png.h 的困难

Posted 2023-02-14

【中文标题】需要帮助在 mac os x 上安装 python 包 autopy - libpng 和 png.h 的困难

【英文标题】：Need help installing python package autopy on mac os x - difficulty with libpng and png.h

【发布时间】：2012-01-13 17:10:09

【问题描述】：

我想知道是否有人可以帮助我解决这个问题。当我尝试 python setup.py build（或 pip install 或 easy_install）时，会发生这种情况

要点是

src/png_io.c:3:17: error: png.h: No such file or directory
src/png_io.c: In function ‘newMMBitmapFromPNG’:
src/png_io.c:34: error: ‘png_struct’ undeclared (first use in this function)
src/png_io.c:34: error: (Each undeclared identifier is reported only once

...一堆错误...

src/png_io.c:332: error: ‘PNG_TRANSFORM_IDENTITY’ undeclared (first use in this function)
lipo: can't figure out the architecture type of:  /var/folders/kt/d8t29zkx7kd_7c_mr17ntv6m0000gn/T//ccubs4CM.out

error: command 'gcc-4.2' failed with exit status 1

libpng 在 Library/Frameworks 中，它在 的搜索路径中包含（我用 cpp -v 检查过），但它作为 libpng.framework 在那里，然后标题位于名为 headers 的子目录中。 libpng.framework 文件中还有几个版本的 libpng。我也在运行 64 位 python。任何想法如何进行？

谢谢， 帕特

【参考方案1】：

如你所料，错误是因为编译器找不到头文件png.h

你能告诉我这个框架是如何被包含进来的吗？你在使用 -I 和 -L 吗？

在 GCC 中包含框架的正确语法是

gcc -F*dir*

或

gcc -iframework*dir*

希望对你有帮助

来自http://gcc.gnu.org/onlinedocs/gcc/Darwin-Options.html

-Fdir 将框架目录 dir 添加到要搜索头文件的目录列表的头部。这些目录与 -I 选项指定的目录交错，并按从左到右的顺序扫描。

A framework directory is a directory with frameworks in it. A framework is a directory with a Headers and/or PrivateHeaders directory contained directly in it that ends in .framework. The name of a framework is the name of this directory excluding the .framework. Headers associated with the framework are found in one of those two directories, with Headers being searched first. A subframework is a framework directory that is in a framework's Frameworks directory. Includes of subframework headers can only appear in a header of a framework that contains the subframework, or in a sibling subframework header. Two subframeworks are siblings if they occur in the same framework. A subframework should not have the same name as a framework, a warning will be issued if this is violated. Currently a subframework cannot have subframeworks, in the future, the mechanism may be extended to support this. The standard frameworks can be found in /System/Library/Frameworks and /Library/Frameworks. An example include looks like #include <Framework/header.h>, where Framework denotes the name of the framework and header.h is found in the PrivateHeaders or Headers directory.

【参考方案2】：

在这种特殊情况下，这是因为您缺少 libpng。 （带有png.h的框架）

您可以从 http://ethan.tira-thompson.com/Mac_OS_X_Ports.html 安装它，然后重新运行 autopy 安装，您应该一切顺利！