stmcubemx convert c to c++

[johannes_hellbeck]

Posted on May 05, 2017 at 20:10

Hello,

When I compile STM32CubeMX generated C file with my IDE ( OpenSTM32 last version)

to

C is ever think ok.

In the Project Explorer I convert to c++.

But when I change main.c

to main.cpp I get an error message “make: ***

http://www.openstm32.org/Drivers/Hans.o

Error 258�?.

Is there a solution available?

Thanks Johannes

• OS windows 10

  Version: Mars.2 Release (4.5.2) STM32L432KU STM32Cube V1.0 Version 4.20.#

[Imen.D]

Posted on May 08, 2017 at 16:17

Hi,

Please share your .ioc file and 

I will report this issue internally for checking.

 

Thanks

Imen

[AvaTar]

Posted on May 09, 2017 at 08:38

It would be new to me that Cube supports C++.

In the Project Explorer I convert to c++.

But when I change main.c to main.cpp

I get an error message “make: ***

/external-link.jspa?url=http%3A%2F%2Fwww.openstmorg%2FDrivers%2FHans.o

Error 258�?

Because it is not that easy.

C++ requires a different startup file, a different linker, and has it's own strategy of naming functions ('name mangling').

Thus your linker trouble.

[johannes_hellbeck]

Posted on May 09, 2017 at 14:12

Sorry for my poor description,

I use the openstm32 workbench (IDE).

For my MCU (STM32 L432KU) configuration I use the STMcube (very powerful tool!)

I know that stm32 cube only generate C files, but I use the import function of the IDE.

Convert the file to C++ and rename the main.c to main.cc.

Then the error occurs:

“make: ***

/external-link.jspa?url=http%3A%2F%2Fwww.openstmorg%2FDrivers%2FHans.o

Error 258�?.

Is that a problem from stcube or openstm32 workbench, or is it my

fault?

Thanks Johannes

[AvaTar]

Posted on May 09, 2017 at 15:45

Then the error occurs:

“make: ***

/external-link.jspa?url=http%3A%2F%2Fwww.openstmorg%2FDrivers%2FHans.o

Error 258�?.

Can you describe/post the actual error message here ?

At least for me, the link does not help. I see no additional information.

AFAIK, openstm32 is Eclipse-based, and thus should give you a full build log.

[johannes_hellbeck]

Posted on May 09, 2017 at 19:30

Attached the request files. When I rename under openstm32 the main.cpp back to main.c

the error disappears.

________________ Attachments : global-build.log.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HyJP&d=%2Fa%2F0X0000000bAo%2FTC15oP_7FbN13ns0amdPV0z5Wfj.9b2S_.PqaEdd8dI&asPdf=falsetest_st_02.ioc.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HyZR&d=%2Fa%2F0X0000000bAp%2F9xErxr6.Ktf91hmXYiZR4F2sO7lsivBafjfTkzd.kS4&asPdf=false

[AvaTar]

Posted on May 09, 2017 at 19:41

I bet on

https://en.wikipedia.org/wiki/Name_mangling

.

C:\Users\Papa\Desktop\workbench_test2\test_st_02\Debug/../startup/startup_stm32l432xx.s:116: undefined reference to `main'

Reading build logs & finding and identifying errors is an essential skill ...

[valentin]

Posted on May 10, 2017 at 06:50

Try Atollic. Conversion works a treat there. You'd only have to manually copy all includes and symbols etc over from the C compiler settings. That's easy though as it directly support ctrl+c/v.

[AvaTar]

Posted on May 10, 2017 at 09:31

Adding '

extern 'C'

' to declarations of functions specifically referenced externally would help as well.

One should know what he does before assigning the extension of another programming language to a source file.

[johannes_hellbeck]

Posted on May 10, 2017 at 12:24

Thanks, I'll try it out.

But I’m surprised, that`s not work a little bit “easier� . To make the base configuration for timer , I2c, etc. with stmcube and work further with Atollic or another IDE in c++ must be the �normal� way….

I think , that will be a good thing  ST, Atollic/AC6 work here together and look for a solution…