Jan Woetzel wrote:
Brad King wrote:
IF(BUILD_EXAMPLES)
Thanks Brad,
that's almost the approach we currently use except
IF (BUILD_EXAMPLES OR BUILD_TESTING)
for ctest ADD_TEST executable targets.
However,
we are not satisfied with this approach because:
(1) If someone has built only the libs and he decides he wants the
examples,
he has to run cmake to set BUILD_EXAMPLES (which takes time) which
creates/configures a new config.h (from config.in).
This config.h is included alomost everywhere and thus everything is
unneccessarily rebuilt.
Why do you have a definition for BUILD_EXAMPLES in the top-level
config.h? Building the libs certainly shouldn't care whether examples
will be built. If a few of the sources do need to know for some reason
just create a different configured header for BUILD_EXAMPLES and include
it in only the sources that need it.
So we prefer the approach of target:
- "all" build libs+executables,
- "libs" compiles+links all libraries but skips compiling+linking
executables.
ADD_CUSTOM_TARGET(libs)
ADD_DEPENDENCIES(libs lib1 lib2)
-Brad
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