On Wednesday 07 Jul 2010 8:54:52 pm Kishore wrote: > On Friday 02 Jul 2010 12:36:17 am Kishore wrote: > > On Friday 02 Jul 2010 12:07:07 am Alexander Neundorf wrote: > > > On Thursday 01 July 2010, Kishore wrote: > > > > It seems that the PROJECT() command does a fair bit behind the scenes > > > > and is not documented enough. It seems to "reset" several variable > > > > created before it was first called. > > > > > > > > Since i use cmake from cross compilation, i have created Platform > > > > files for Generic-gcc.cmake and Generic-gcc-uc3b1256.cmake (for the > > > > processor that I use) > > > > > > > > 1) It seems that these files are invoked inside the PROJECT() command > > > > 2) The platform files set up some needed variables such as > > > > CMAKE_C_FLAGS 3) When the PROJECT() command finishes, the variable > > > > CMAKE_C_FLAGS is again empty. > > > > > > project() automatically enable the languages, if no languages are > > > given, it tries C and C++. While doing this, a whole bunch of > > > variables are set. > > > > Fair enough. But then it should take into account the values i have set > > for some of those variables in the platform modules. OTOH if it's wrong > > to be setting those variables in the platform files where else should > > they be set and what is the role of they platfrom modules? > > This does not seem to be well documented but the way to actually set the > right values for those variable is to use the <VAR>_INIT form. This works > as expected but is not a documented variable. > > Similarly, in my project, I want to configure in Release mode if the user > does not explicitly specify any at cmake time. Again, the solution for > this seems to be > > SET(CMAKE_BUILD_TYPE_INIT Release) > PROJECT(MyProject) > > i.e. set the variable CMAKE_BUILD_TYPE_INIT before the first call to > PROJECT(). Hope this helps someone. I wonder how many such *_INIT > variables are understood by cmake.
The price we pay for using undocumented features... And it turns out that CMAKE_C_LINK_FLAGS_INIT is not an understood variable in cmake. So far i know these work CMAKE_C_FLAGS_INIT CMAKE_BUILD_TYPE_INIT CMake devs, are these variables just missing documentation or are they really not meant to be used? -- Cheers! Kishore _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
