AM2432: Building

Mari Tsunoda

Expert 5726 points

Part Number: AM2432

Hi Team,

My customer has a few questions regarding software build.

I assume you can build assembler code, but do you have any sample code that shows the format in which the assembler code is written? If so, please provide a reference URL.
There is code that describes exceptions such as throw, try, etc. The following error occurs when building this code. "error: cannot use 'throw' with exceptions disabled" It seems to be possible to use the compile option --fexceptions, but when I give it, I get the error "tiarmclang: error: C++ exceptions not supported. The problem occurs. Please let us know when you plan to support this compile option. If you are undecided, please let us know that you are undecided.
Is there an option to replace tiarmclang with the following compile options for the ARM compiler?
--apcs=interwork
--split_sections

Best regards,

Mari Tsunoda

over 3 years ago

0 Ming Wei over 3 years ago

TI__Guru 54895 points

Hi Mari,

1. There a few assembly files in the MCU+ SDK: C:\ti\mcu_plus_sdk_am243x_08_02_00_31\source\kernel\nortos\dpl\r5\boot_armv7r_asm.S and C:\ti\mcu_plus_sdk_am243x_08_02_00_31\source\kernel\freertos\portable\TI_ARM_CLANG\ARM_CR5F\portASM.S

2. For R5F cores, the current MCU+ SDK only supports TI CLANG CGT.

3. I am not aware of such option available.

Best regards,

Ming

0 Mari Tsunoda over 3 years ago in reply to Ming Wei

TI__Expert 5726 points

Hi Ming,

Thanks for answering these questions. With regards to q1, is there any way to output an assembly file during compilation(ie. using a compiler option/flag)?

Best regards,

Mari Tsunoda

0 Ming Wei over 3 years ago in reply to Mari Tsunoda

TI__Guru 54895 points

Hi Mari,

Yes, if you select Build --> Arm Compiler --> Advanced Options --> Control Options --> "Keep all temporary files generated during compilation" (-save-temps) in any CCS project file, then the *.s file will stay in Debug or Release folder.

Best regards,

Ming

0 Mari Tsunoda over 3 years ago in reply to Ming Wei

TI__Expert 5726 points

Hi Ming,

Following up on Q2. I see in this link: https://software-dl.ti.com/codegen/docs/tiarmclang/compiler_tools_user_guide/migration_guide/migrating_c_and_cpp_source/pre_defined_macro_symbols.html?highlight=fexceptions

under 3.3.5. Additional Pre-Defined Macro Symbols Supported in tiarmclang,

__EXCEPTIONS

The tiarmclang compiler defines the __EXCEPTIONS macro symbol if -fexceptions is specified when compiling a C++ source file. Exceptions are disabled by default when compiling with the tiarmclang compiler.

Shouldn't the exceptions be supported?

Best regards,
Mari Tsunoda

0 Ming Wei over 3 years ago in reply to Mari Tsunoda

TI__Guru 54895 points

Hi Mari,

I never tried it before personally. If it says that in the TI CLANG document, I would trust it and give it a try.

The other thing I noticed there is an Language Options in CCS project properties where you can select the C++ language standard (-std), such as "C++ 98", "C++ 03" etc. You may want give it a try too.

Best regards,

Ming

0 Chester Gillon over 3 years ago

Guru 92251 points

Mari Tsunoda said:
The following error occurs when building this code. "error: cannot use 'throw' with exceptions disabled" It seems to be possible to use the compile option --fexceptions, but when I give it, I get the error "tiarmclang: error: C++ exceptions not supported. The problem occurs. Please let us know when you plan to support this compile option. If you are undecided, please let us know that you are undecided.

ti-cgt-armllvm_1.3.0.LTS tiarmclang reports "error: C++ exceptions not supported" from 11 months ago says:

While the tiarmclang compiler will support C++ exceptions in the long term, in the short term they are not supported.

I haven't found when C++ exception support is planned.

+1 George Mock over 3 years ago

TI__Guru**** 249260 points

Mari Tsunoda said:
It seems to be possible to use the compile option --fexceptions, but when I give it, I get the error "tiarmclang: error: C++ exceptions not supported. The problem occurs. Please let us know when you plan to support this compile option.

While adding support for C++ exceptions is on the roadmap, we have nothing to announce at this time.

Mari Tsunoda said:
Is there an option to replace tiarmclang with the following compile options for the ARM compiler?
--apcs=interwork
--split_sections

Those are not options which are supported by the proprietary TI ARM compiler armcl. They are supported by yet other ARM compilers. We have detailed documentation and support for migrating from armcl to tiarmclang, but not from other ARM compilers.

Thanks and regards,

-George

0 Mari Tsunoda over 3 years ago in reply to George Mock

TI__Expert 5726 points

Hi All,

Thanks for all of your responses. I've let them know that C++ exceptions have plans to be supported, but nothing concrete at the moment.

Best regards,

Mari

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AM2432: Building