Robert Schwarzelt <rschwarz...@gmail.com> writes: > Hi all, > I need to implement a code export function, that will only export code used > in a specific project configuration. > For this purpose I want to use unifdef (http://dotat.at/prog/unifdef/), > which is capable of removing unused #ifdef blocks. > > The project uses static libraries like in following example: > > add_library( > foo STATIC > foo.c > ) > > add_library( > bar STATIC > bar.c > ) > > target_compile_definitions(bar INTERFACE HAVE_BAR) > target_link_libraries(foo LINK_PUBLIC bar) > > > Now foo.c will be compiled with -DHAVE_BAR at build time. > To create a custom target using unifdef i need this information at cmake > configure time. I expected to find this in the property COMPILE_DEFINITIONS > of either the source file foo.c or target foo, but both are empty. > > Does anyone know, how to get a list of definitions (that will be used at > build time) for targets or files?
Not to discourage you, but *every time* I've asked a question along the lines of "how can I get a list of foo for a source file / target at cmake configuration time" the answer has been "oh, that's not easy", or even "oh, that's not possible". In every case I've resorted to trying to find a way to push what I want to do until build time. If you *can* find a way to do it post-configuration time I believe you will have access to everything you need if you set "CMAKE_EXPORT_COMPILE_COMMANDS" and then look at the resulting `compile_commands.json`. /M -- Magnus Therning OpenPGP: 0x927912051716CE39 email: mag...@therning.org jabber: mag...@therning.org twitter: magthe http://therning.org/magnus Finagle's Second Law: Always keep a record of data — it indicates you've been working.
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