Remove micro_copts() by replacing every cc_* target that used
them with a tflm_cc_* equivalent, and setting those common copts
in one place, inside the tflm_cc_* macro.
This is the first of several commits introducing tflm_cc_* macros
in place of cc_binary, cc_library, and cc_test. Motivated by the
upcoming need to support conditional compilation, the objective
is to centralize build configuration rather than requiring (and
remembering that) each cc_* target in the project add the same
common attributes such as compiler options and select()ed
Alternatives such as setting global options on the command line
or in .bazelrc, even if simplified with a --config option, fail
to preserve flags and hooks for configuration in the case TFLM is
used as an external repository by an application project. Nor is
it easy in that case for individual targets to override an
otherwise global setting.
BUG=#2636
Hoist the universally-useful tflite::Span out of
codegen/runtime/micro_codegen_context.h and into an independent header
usable from elsewhere in the project.
BUG=#2636
The TFLM code_generator takes a TFLite model and generates C/C++ source code that can then be compiled into a binary. This change adds a Bazel macro for invoking the code generator and creating a cc_library with the resulting sources. It also updates the checked-in hello_world example with an appropriate BUILD file and updates the script to use Bazel instead of make.
BUG=b/294230402
The TFLM kernels use the MicroContext and MicroGraph interfaces to fetch
eval tensors and access other parts of the graph. Since codegen does not
have the MicroInterpreter and related objects to serve those, this PR
introduces a new MicroCodegenContext class that serves as both the
MicroContext and MicroGraph.
The MicroCodegenContext is configured with a span of Subgraphs, each of
which includes the inputs, outputs, nodes, tensors and an invocation
function. The code generator will create the data and functions needed
for each Subgraph and initialize the MicroCodegenContext with it. By
having the re-usable MicroCodegenContext, the code generator won't have
to generate nearly as much code.
BUG=b/295174086
