Filed under:
http://public.kitware.com/Bug/view.php?id=9418
Many thanks Eric and Michael.
PS. Indeed, cmake-gui does NOT modify the cache in vein, which is what I
would expect.
Dominik
Eric Noulard wrote:
2009/8/14 Michael Wild <them...@gmail.com>:
I also noticed that ccmake always modifies the cache. But that in itself
should NOT cause a complete rebuild of your project. On the next `make' it
should only re-configure and regenerate the build system, and then print a
list of all targets as Make checks them all, but nothing should be compiled
or linked.
Agreed same here.
CMake 2.6.4 on Linux.
I should add that on my side ONLY ccmake and make edit_cache do
unconditionnally modify the cache.
cmake-gui does NOT do that, Dominik can you confirm that your cmake-gui
does modify the cache?
The modification seems to concern, this var:
//Advanced flag for variable: CMAKE_BUILD_TOOL
CMAKE_BUILD_TOOL-ADVANCED:INTERNAL=1
"ccmake" and "make edit_cache" do suppress this var unconditionnally
and rewrite the CMakeCache.txt
Is it possible that in your CMake code you unconditionally modify (e.g.
re-create) a central header file, such as config.h? If you do that, Make
will think everything else is out-of-date and recompile. But if you either
use configure_file or add_custom_command, things should be fine. file(WRITE
${CMAKE_BINARY_DIR}/config.h ...) would cause troubles!
That may be the reason but I think Dominik is right the unconditionnal
modification
of the CMakeCache.txt is not an expected behavior and deserve a bug report.
Dominik would you like to file the bug report?
http://public.kitware.com/Bug/main_page.php
In the meantime, I think cmake-gui seems to be more CMakeCache.txt friendly
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