Capture custom step output ExternalProject_Add

Usage
1

Hello everyone,

What would be a sane way to capture custom step output ExternalProject_Add in some cmake variable ?

For example:

...
ExternalProject_Add(some_autotools_dep
	GIT_REPOSITORY some_dep_url
	GIT_TAG	some_tag
	GIT_SHALLOW ON
	GIT_PROGRESS ON

	CONFIGURE_COMMAND ./configure ...
	BUILD_COMMAND cd <SOURCE_DIR> && make
	INSTALL_COMMAND cd <SOURCE_DIR> && make install
	UPDATE_COMMAND ""
	BUILD_ALWAYS OFF
)

ExternalProject_Add_Step(some_autotools_dep check_upstream_file_sha
  COMMAND	${CMAKE_COMMAND} -E sha512sum some_upstream_file
  DEPENDERS	configure
  WORKING_DIRECTORY <SOURCE_DIR>
  COMMENT           "Checking sha..."
  ALWAYS            TRUE
)

// At this point I can see my custom step being executed at build stage
// and there is an stdout output of type: 
// <some_hash_string> <some_upstream_file>
...

So the idea is to capture <some_hash_string> to a variable or maybe have some other way to check hash against somehow predetermined value ?

Thanks.

2

Not sure if it is exactly what you need, but check the logging related options (LOG_CONFIGURE, LOG_BUILD, etc.), maybe also the LOG_DIR option if you need to control where the log files are generated.