[CMake] Differentiating between FreeBSD and Linuxs

[Hendrik Sattler]

Am Mittwoch 16 Mai 2007 18:52 schrieb Ajay Divekar:
> I was trying to differentiate between FreeBSD and Linux's and found that by
> using CMAKE_SYSTEM_NAME variable I will be able to do that. I had
>
> if (CMAKE_SYSTEM_NAME MATCHES Linux)
>   SET(...)
> ELSE(CMAKE_SYSTEM_NAME MATCHES Linux)
>   SET(...)
> ENDIF(CMAKE_SYSTEM_NAME MATCHES Linux)

Sadly, this variable is also use by CPack to name the resulting file. This has 
several disadvantages:
- very uncommon naming (not all lowercase)
- not descriptive enough because the architecture is missing
- it describes the build system and not what the binary was built for

Can CPack be changed to default to "gcc -dumpmachine" on Unix systems when 
using gcc (with replacing the first part of the triplet when -march is used)?

The same is for Windows: it matters if a C++ library was build with mingw32 or 
with the microsoft compiler and the automatic package naming should take 
notice of this (e.g. "mingw32"/"mingw64" for g++, "win32"/"win64" for vc++).

Sure, it can be done manually in the CMakeLists.txt but it is a pain to do for 
every project :-/

HS