[CMake] Building with CMake on MinGW/MSYS

[Hendrik Sattler]

Zitat von Florent Teichteil <florent.teichteil at gmail.com>:

> Le 19/02/2010 12:09, Hendrik Sattler a écrit :
>> Zitat von Florent Teichteil <florent.teichteil at gmail.com>:
>>> I am trying to build the OpenJPEG library, that uses CMake to generate
>>> Makefiles, on MSYS with MinGW's gcc compiler.
>>>
>>> Some files of the library include system-dependent headers depending on
>>> the host system:
>>>
>>> #ifdef WIN32
>>> #include <windows.h>
>>> #else
>>> #include <sys/time.h>
>>> #include <sys/resource.h>
>>> #include <sys/times.h>
>>> #endif /* WIN32 */
>>>
>>> However, the compilation of these files fails because the variable
>>> "WIN32" is (very strangely) not defined, so that gcc goes inside the
>>> "#else" statement and does not find the headers under the "sys"
>>> directory (which do not exist on windows). As I am compiling on a
>>> windows platform on MSYS, shouldn't I expect the variable "WIN32" to be
>>> defined? I tried the "MSYS" and "Unix" makefile generators, but none of
>>> them works.
>>
>> The pre-processor symbol is called _WIN32, not WIN32 (not the leading
>> underscore):
>> http://predef.sourceforge.net/preos.html#sec24
>>
>> HS
>>
>>
>
> Is _WIN32 a standard macro or only defined by cmake? I'd like to know in
> order to inform openjpeg's authors about it so that they can modify
> their code at best in their mind.

The link had a purpose.

HS