CELLULAR can't compile is DEVICE_SERIAL is not enabled

[jeromecoutant]

Description

How to reproduce: remove SERIAL from DEVICE_HAS in targets json file, and compile a target (with no cellular):

[Error] CellularDevice.h@197,0:  #20: identifier "UARTSerial" is undefined
[Error] CellularContext.h@269,0:  #20: identifier "UARTSerial" is undefined
[Error] AT_CellularContext.h@61,0:  #20: identifier "UARTSerial" is undefined
[Error] AT_CellularContext.cpp@92,0:  #20: identifier "UARTSerial" is undefined
[Error] AT_CellularContext.cpp@105,0:  #20: identifier "UARTSerial" is undefined

Issue request type

[ ] Question
[ ] Enhancement
[x] Bug

[jeromecoutant]

Even with .mbedignore fiel with:

*cellular*
*greentea*
*utest*
*unity*

We got link error:

[DEBUG] Errors: Error: L6218E: Undefined symbol CellularInterface::get_target_default_instance() (referred from BUILD/NUCLEO_L476RG/ARM/features/netsocket/NetworkInterfaceDefaults.o)

@SeppoTakalo

[SeppoTakalo]

@AriParkkila This needs to go into Cellular teams backlog.

Those files needs probably #if DEVICE_SERIAL to protect the build.

[jeromecoutant]

mbed-os/drivers/UARTSerial.h

Line 23 in b08ddaa

#if (DEVICE_SERIAL && DEVICE_INTERRUPTIN) || defined(DOXYGEN_ONLY)

Seems that we need to protect also with DEVICE_INTERRUPTIN

Thx

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOCUSTRIA-925

[jeromecoutant]

Hi

Note that this issue is raised during TFM scope. (#9221) (#9853)

cc @ARMmbed/mbed-os-hal @ARMmbed/mbed-os-maintainers @ARMmbed/mbed-os-psa

[0xc0170]

@ARMmbed/mbed-os-wan

[jeromecoutant]

Bump

Thx

[AriParkkila]

@jeromecoutant Can you refer to an Mbed target that does not support DEVICE_SERIAL so I could try with that?

It seems to me that Mbed OS actually requires DEVICE_SERIAL, for example Greentea:

Compile [ 15.7%]: greentea_serial.cpp
[ERROR] In file included from ./features/frameworks/greentea-client/source/greentea_serial.cpp:1:
./features/frameworks/greentea-client/greentea-client/greentea_serial.h:10:37: error: expected class name
class GreenteaSerial : public mbed::RawSerial {
                                    ^
./features/frameworks/greentea-client/source/greentea_serial.cpp:15:42: error: member initializer 'RawSerial' does not name a non-static data member or base class

[jeromecoutant]

Hi

Can you refer to an Mbed target that does not support DEVICE_SERIAL so I could try with that?

This question is related to TFM integration.
Idea is to create a new secure target which doesn't need SERIAL API.

It seems to me that Mbed OS actually requires DEVICE_SERIAL, for example Greentea

Yes, I raised #9850 :-)

[AriParkkila]

@jeromecoutant #10029 fixes cellular dependencies to DEVICE_SERIAL.

Could you create an issue for UARTSerial.h / DEVICE_INTERRUPTIN to be fixed separately.

[kjbracey]

I believe Jerome's point in the comment above was that your compile condition needs to match UARTSerial's availability condition - ie it has to be DEVICE_SERIAL && DEVICE_INTERRUPTIN.

Although that condition is itself rather strange - it's only the DCD line that it needs InterruptIn in for, so maybe it would be better if UARTSerial only made that DCD functionality conditional.