如何在 x64 机器上从 nmake 访问 ProgramFiles 环境变量？
我尝试获取 ProgramFiles 环境变量的路径，该变量应该扩展到 x64 上的 C:\Program Files (x86)机和 x86 机器上的 C:\Program Files。
问题是，在 nmake 文件中，如果我这样做：
all:
echo $(PROGRAMFILES)
这每次都会扩展到 C:\Program Files ，这是错误的。
x64 机器的环境详细信息：
ProgramFiles(x86)=C:\Program Files (x86)
ProgramW6432=C:\Program Files
:: this one is special, if will return different results based on current process x86/x64
ProgramFiles=C:\Program Files (x86) or C:\Program Files
PROCESSOR_ARCHITECTURE=x86 or x64
现在更新的问题是如何获取 nmake 中 x86 程序文件的位置，以某种方式在 x86 和 x64 机器上都工作？
I try to get the path to the ProgramFiles environmental variable, that is supposed to expand to C:\Program Files (x86) on a x64 machine and to C:\Program Files on a x86 machine.
The problems is that in the nmake file if I do:
all:
echo $(PROGRAMFILES)
This will expand to C:\Program Files everytime and this is wrong.
Environment details from a x64 machine:
ProgramFiles(x86)=C:\Program Files (x86)
ProgramW6432=C:\Program Files
:: this one is special, if will return different results based on current process x86/x64
ProgramFiles=C:\Program Files (x86) or C:\Program Files
PROCESSOR_ARCHITECTURE=x86 or x64
Now the updated question is how to get the location of x86 program files inside nmake, in a way this will work on both x86 and x64 machines?
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该表达式似乎适用于 64 位 Windows 7，
nmake在 32 位和 64 位中运行：例如
This expression seems to work on 64-bit Windows 7, with
nmakerunning in both 32-bit and 64-bit:e.g.
如果您使用的是 x64 计算机，则
%ProgramFiles%指向C:\Program Files是完全合法的 - 在 64 位程序环境中。用于获取 x86 对应项的变量是
%ProgramFiles(x86)%。可以通过评估在
PROCESSOR_ARCHITECTURE环境变量中设置的当前操作系统架构（例如设置为AMD64）来确定使用哪一种。或者只是尝试获取%ProgramFiles(x86)%，如果它为空，则获取%ProgramFiles%的内容。另一种方法是启动 32 位
cmd.exe并在那里运行您的 make。它位于C:\Windows\SysWOW64。If you're on an x64 machine it is totally legal that
%ProgramFiles%points toC:\Program Files- from within a 64-bit program's environment.The variable you have to use to get the x86 counterpart is
%ProgramFiles(x86)%.Which one to use can be determined by evaluating the current OS's architecture that is set in the
PROCESSOR_ARCHITECTUREenvironment variable (which is e.g. set toAMD64). Or simply try to get%ProgramFiles(x86)%and if it is empty get the content of%ProgramFiles%.Another approach would be to start a 32-bit
cmd.exeand run your make there. It is located inC:\Windows\SysWOW64.