[CMake] Help re-generating CMakeCache

[Ashwin Chandra]

I am using a Linux makefile to pass an environment variable into cmake.
For example, I call

 

"MYVAR=test make -f Linux.mak debug-build"

 

Then inside my Linux.mak I issue a "cmake ... -DMYCMAKEVAR=$(MYVAR)". 

 

This defintion works fine the first time I do a build and cmake
generates all the cmakecache and makefiles. 

 

But after I build once, let's say I decide to change MYVAR to:

 

"MYVAR=test1234 make -f Linux.mak debug-build"

 

Then CMake doesn't seem to update the CMakeCache with this new value of
MYCMAKEVAR. 

Something about building a second time when the cache has already been
created is causing this to fail.

 

Any Ideas??

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