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Possible error due to C complier requirement for 'tensorflow/lite/experimental/microfrontend/lib' instead of C++ compiler
After pulling in most recent changes as of today (tfmicro@6d4a771 with tensorflow@33689c4 on macOS.10.15.5) and running:
$ cargo clean --verbose && cargo test --verbose
I get one of the (all similar) errors shown below:
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:164:22: error: assigning to 'int16_t *' (aka 'short *') from incompatible type 'void *'
warning: state->unweights = calloc(weight_index_start, sizeof(*state->unweights));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This occurs for both CC=clang and CC=gcc which gives similar messages, indicating that the reason might be down to needing to compile the code from tensorflow/tensorflow/lite/experimental/microfrontend/lib with a C compiler instead of C++.
Refs:
- https://stackoverflow.com/a/34286385/4521950
- https://stackoverflow.com/a/34375805/4521950
The full output from using clang is shown here, and a trimmed gcc version of the message is below that. I tried myself to modify build.rs, but it got to a point where I had to admit to myself I am too much of a newbie to be able to know really what to fix.
CC=clang:
Running `/Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-4b1014e20b828738/build-script-build`
The following warnings were emitted during compilation:
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:69:7: error: assigning to 'int16_t *' (aka 'short *') from incompatible type 'void *'
warning: malloc(num_channels_plus_1 * sizeof(*state->channel_frequency_starts));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:71:7: error: assigning to 'int16_t *' (aka 'short *') from incompatible type 'void *'
warning: malloc(num_channels_plus_1 * sizeof(*state->channel_weight_starts));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:73:7: error: assigning to 'int16_t *' (aka 'short *') from incompatible type 'void *'
warning: malloc(num_channels_plus_1 * sizeof(*state->channel_widths));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:74:17: error: assigning to 'uint64_t *' (aka 'unsigned long long *') from incompatible type 'void *'
warning: state->work = malloc(num_channels_plus_1 * sizeof(*state->work));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:76:10: error: cannot initialize a variable of type 'float *' with an rvalue of type 'void *'
warning: float* center_mel_freqs =
warning: ^
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:78:12: error: cannot initialize a variable of type 'int16_t *' (aka 'short *') with an rvalue of type 'void *'
warning: int16_t* actual_channel_starts =
warning: ^
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:80:12: error: cannot initialize a variable of type 'int16_t *' (aka 'short *') with an rvalue of type 'void *'
warning: int16_t* actual_channel_widths =
warning: ^
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:163:20: error: assigning to 'int16_t *' (aka 'short *') from incompatible type 'void *'
warning: state->weights = calloc(weight_index_start, sizeof(*state->weights));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tensorflow/tensorflow/lite/experimental/microfrontend/lib/filterbank_util.c:164:22: error: assigning to 'int16_t *' (aka 'short *') from incompatible type 'void *'
warning: state->unweights = calloc(weight_index_start, sizeof(*state->unweights));
warning: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: 9 errors generated.
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
warning: clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
error: failed to run custom build command for `tfmicro v0.1.0 (/Users/tallamjr/github/EDGE22/forks/tfmicro)`
CC=gcc:
error[E0658]: unions with non-`Copy` fields are unstable
--> /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tflite_types.rs:386:9
|
386 | / pub union basic_string___short__bindgen_ty_1<_CharT> {
387 | | pub __size_: cty::c_uchar,
388 | | pub __lx: root::std::basic_string_value_type<_CharT>,
389 | | _bindgen_union_align: u8,
390 | | pub _phantom_0:
391 | | ::core::marker::PhantomData<::core::cell::UnsafeCell<_CharT>>,
392 | | }
| |_________^
|
= note: see issue #55149 <https://github.com/rust-lang/rust/issues/55149> for more information
error[E0658]: unions with non-`Copy` fields are unstable
--> /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tflite_types.rs:386:9
|
386 | / pub union basic_string___short__bindgen_ty_1<_CharT> {
387 | | pub __size_: cty::c_uchar,
388 | | pub __lx: root::std::basic_string_value_type<_CharT>,
389 | | _bindgen_union_align: u8,
390 | | pub _phantom_0:
391 | | ::core::marker::PhantomData<::core::cell::UnsafeCell<_CharT>>,
392 | | }
| |_________^
|
= note: see issue #55149 <https://github.com/rust-lang/rust/issues/55149> for more information
error[E0740]: unions may not contain fields that need dropping
--> /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tflite_types.rs:388:13
|
388 | pub __lx: root::std::basic_string_value_type<_CharT>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: `std::mem::ManuallyDrop` can be used to wrap the type
--> /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tflite_types.rs:388:13
|
388 | pub __lx: root::std::basic_string_value_type<_CharT>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0740]: unions may not contain fields that need dropping
--> /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tflite_types.rs:388:13
|
388 | pub __lx: root::std::basic_string_value_type<_CharT>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: `std::mem::ManuallyDrop` can be used to wrap the type
--> /Users/tallamjr/github/EDGE22/forks/tfmicro/target/debug/build/tfmicro-950f68498590f496/out/tflite_types.rs:388:13
|
388 | pub __lx: root::std::basic_string_value_type<_CharT>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0658, E0740.
For more information about an error, try `rustc --explain E0658`.
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0658, E0740.
For more information about an error, try `rustc --explain E0658`.
Please do let me know if there is more information that would be useful.
