gcc 包括路径和符号链接
我正在尝试在 Snow Leopard 上编译 Macports，特别是文件 src/macports1.0/get_systemconfiguration_proxies.c。这个#include是CoreFoundation/CoreFoundation.h，其中#include是CoreFoundation/CFBase.h，其中... 尝试#include CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h。现在， CoreServices 是一个符号链接：
$ ls -l CoreServices
lrwxr-xr-x 1 root wheel 62 Mar 25 17:15 CoreServices -> ../../System/Library/Frameworks/CoreServices.framework/Headers
所以我怀疑目标是到达 ../../System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers /MacTypes.h，这是一件非常好的事情：
$ ls -l ../../System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/MacTypes.h
-rw-r--r-- 1 root wheel 30291 Jun 24 2010 ../../System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/MacTypes.h
但是，gcc不喜欢它：
In file included from $INCLUDE/CoreFoundation/CFBase.h:48,
from $INCLUDE/CoreFoundation/CoreFoundation.h:38,
from get_systemconfiguration_proxies.c:42:
$INCLUDE/CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h:20:42: error: CarbonCore/ConditionalMacros.h: No such file or directory
这让我怀疑
（编辑：但是Tom Zych 指出我怀疑错误，因为我没有读完错误消息。）
gcc 可能无法解析符号链接，而是过度智能地崩溃 CoreServices/../Frameworks/CarbonCore。 Framework/Headers/MacTypes.h 到 Frameworks/CarbonCore.framework/Headers/MacTypes.h，果然，它不存在：
$ ls -l Frameworks/CarbonCore.framework/Headers/MacTypes.h
ls: Frameworks/CarbonCore.framework/Headers/MacTypes.h: No such file or directory
我是否有可能解释了该错误正确吗？如果是这样，有什么方法可以让 gcc 在 cd'ing 到 .. 之前跟随符号链接吗？
I am trying to compile Macports on Snow Leopard—specifically, the file src/macports1.0/get_systemconfiguration_proxies.c. This #includes CoreFoundation/CoreFoundation.h, which #includes CoreFoundation/CFBase.h, which … tries to #include CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h. Now, CoreServices is a symlink:
$ ls -l CoreServices
lrwxr-xr-x 1 root wheel 62 Mar 25 17:15 CoreServices -> ../../System/Library/Frameworks/CoreServices.framework/Headers
so I suspect that the goal is to get to ../../System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/MacTypes.h, which is a perfectly fine thing to do:
$ ls -l ../../System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/MacTypes.h
-rw-r--r-- 1 root wheel 30291 Jun 24 2010 ../../System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/MacTypes.h
However, gcc doesn't like it:
In file included from $INCLUDE/CoreFoundation/CFBase.h:48,
from $INCLUDE/CoreFoundation/CoreFoundation.h:38,
from get_systemconfiguration_proxies.c:42:
$INCLUDE/CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h:20:42: error: CarbonCore/ConditionalMacros.h: No such file or directory
which leads me to suspect
(EDIT: But Tom Zych points out that I suspect wrongly, because I didn't finish reading the error message. Sigh.)
that gcc may not be resolving the symlink, and instead over-smartly collapsing CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h to Frameworks/CarbonCore.framework/Headers/MacTypes.h, which, sure enough, doesn't exist:
$ ls -l Frameworks/CarbonCore.framework/Headers/MacTypes.h
ls: Frameworks/CarbonCore.framework/Headers/MacTypes.h: No such file or directory
Is it possible that I have interpreted the error correctly? If so, is there any way to talk gcc into following the symlink before cd'ing to ..?
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错误消息以以下内容结尾：
看来它能够读取并开始处理
MacTypes.h，因为它引用了其中的行号。它找不到的文件是CarbonCore/ConditionalMacros.h。我猜
CarbonCore应该是CarbonCore.framework。我不知道为什么这个问题很久没有出现并得到解决。也许这是最近的变化。The error message ends with:
It appears that it was able to read and start processing
MacTypes.h, since it's referring to line numbers therein. The file it can't find isCarbonCore/ConditionalMacros.h.I would guess
CarbonCoreshould beCarbonCore.framework. Why this hasn't long since come up and been fixed, I don't know. Perhaps it's a recent change.