bt2: Makefile: track dependencies of native_bt.c
Building native_bt.c involves including many .h files from include/.
Those dependencies are not tracked by the Makefile, which means that if
you build, modify a .h (which can be simply checking out a different
commit) and build again, native_bt.c won't be re-built (even though it
should).
SWIG has the same kind of features to make dependency tracking easy as
gcc. The -MD switch generates a bt2/native_bt.d file containing a make
target with all files involved in generating bt2/native_bt.c. All we
have to do is to include that file in our Makefile. `-include` is used
so that it's not an error if the file does not exist (which happens the
first time you build).
Change-Id: Iedb187657d42770fa2caeadfa07079351af8a485
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/2023
Reviewed-by: Francis Deslauriers <francis.deslauriers@efficios.com>
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