Framework-mbed @ 3.137.0 failing to compile

I’m just receiving the following errors when trying to compile a project using mbed on stm32l4:

Compiling .pioenvs/disco_l476vg/FrameworkMbed-drivers-50e4e/Serial.o
In file included from /home/cjalmeida/.platformio/packages/framework-mbed/platform/platform.h:28:0,
from /home/cjalmeida/.platformio/packages/framework-mbed/drivers/SPISlave.h:19,
from /home/cjalmeida/.platformio/packages/framework-mbed/drivers/SPISlave.cpp:16:
/home/cjalmeida/.platformio/packages/framework-mbed/platform/toolchain.h:23:2: warning: #warning toolchain.h has been replaced by mbed_toolchain.h, please update to mbed_toolchain.h [since mbed-os-5.3] [-Wcpp]
#warning toolchain.h has been replaced by mbed_toolchain.h, please update to mbed_toolchain.h [since mbed-os-5.3]
^
/home/cjalmeida/.platformio/packages/framework-mbed/drivers/RawSerial.cpp: In member function 'int mbed::RawSerial::printf(const char*, ...)':
/home/cjalmeida/.platformio/packages/framework-mbed/drivers/RawSerial.cpp:63:66: error: 'vsnprintf' was not declared in this scope
int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
^
*** [.pioenvs/disco_l476vg/FrameworkMbed-drivers-50e4e/RawSerial.o] Error 1
In file included from /home/cjalmeida/.platformio/packages/framework-mbed/platform/platform.h:28:0,
from /home/cjalmeida/.platformio/packages/framework-mbed/drivers/Serial.h:19,
from /home/cjalmeida/.platformio/packages/framework-mbed/drivers/Serial.cpp:16:
/home/cjalmeida/.platformio/packages/framework-mbed/platform/toolchain.h:23:2: warning: #warning toolchain.h has been replaced by mbed_toolchain.h, please update to mbed_toolchain.h [since mbed-os-5.3] [-Wcpp]
#warning toolchain.h has been replaced by mbed_toolchain.h, please update to mbed_toolchain.h [since mbed-os-5.3]

Just found the error, I had --std=c++11 somewhere in my build path.

Hi,I have the same problem with you.
so,Did you have solved it?

@valeros could you help here?

Use --std=gnu++11 instead of --std=c++11 if using the GCC compiler. Seems there are some dependencies on GNU specific functions.