Config: cellular example broke with >4.0.0 due to target_overrides misconfiguration

[0xc0170]

Description

We used in CI version 4.0.0. I used the same until yesterday. We installed 6.1.1 version and I installed today 7.0.0. I can confirm the latest versions (post 4.0) broke config for cellular example. The rest of examples are OK. Just this one target with one example.

This is now affecting the code freeze.

Example: mbed-os-example-cellular (development -> upstream)
mbedtools compile -m WIO_3G -t GCC_ARM

Error:

FAILED: CMakeFiles/mbed-os-example-cellular.dir/mbed-os/connectivity/lwipstack/lwip/src/api/lwip_err.c.obj
C:\gcc-arm92020-q2-update\bin\arm-none-eabi-gcc.exe @CMakeFiles\mbed-os-example-cellular.dir\mbed-os\connectivity\lwipstack\lwip\src\api\lwip_err.c.obj.rsp -MD -MT CMakeFiles/mbed-os-example-cellular.dir/mbed-os/connectivity/lwipstack/lwip/src/api/lwip_err.c.obj -MF CMakeFiles\mbed-os-example-cellular.dir\mbed-os\connectivity\lwipstack\lwip\src\api\lwip_err.c.obj.d -o CMakeFiles/mbed-os-example-cellular.dir/mbed-os/connectivity/lwipstack/lwip/src/api/lwip_err.c.obj -c ../../../../mbed-os/connectivity/lwipstack/lwip/src/api/lwip_err.c
In file included from ../../../../mbed-os/connectivity/lwipstack/./lwip/src/include/lwip/opt.h:51,
                 from ../../../../mbed-os/connectivity/lwipstack/./lwip/src/include/lwip/err.h:39,
                 from ../../../../mbed-os/connectivity/lwipstack/lwip/src/api/lwip_err.c:39:
../../../../mbed-os/connectivity/lwipstack/./include/lwipstack/lwipopts.h:304:2: error: #error LWIP: IPv6 PPP enabled but not IPv6
  304 | #error LWIP: IPv6 PPP enabled but not IPv6

This comes from this check:

#if MBED_CONF_PPP_IPV6_ENABLED || MBED_CONF_LWIP_IPV6_ENABLED
#define LWIP 0x11991199
#if (MBED_CONF_NSAPI_DEFAULT_STACK == LWIP) && !MBED_CONF_LWIP_IPV6_ENABLED
#error LWIP: IPv6 PPP enabled but not IPv6
#endif

How the tools + config differ:

4.0.0: -DMBED_CONF_LWIP_IPV6_ENABLED=1
6.1.1/7.0.0: -DMBED_CONF_LWIP_IPV6_ENABLED=0

Cellular mbed_app.json:

    "target_overrides": {
        "*": {
            "target.network-default-interface-type": "CELLULAR",
            "mbed-trace.enable": false,
            "lwip.ipv4-enabled": true,
            "ppp.ipv4-enabled": true,
            "lwip.ipv6-enabled": true,
            "ppp.ipv6-enabled": true,

"lwip.ipv6-enabled": true, DMBED_CONF_LWIP_IPV6_ENABLED should be 1.

Issue request type

• Enhancement
• Bug

[0xc0170]

Left : 4.0 tools used
Right: 7.0 tools used

I marked the config value that causes the problem.

Our CI was green prior updating, cellular example has not change (only change there was tools update to change the location of the config).