The online compiler fails to build the Xadow-M0 target with MBED2 rev. 142 and later.

[ruevs]

Description

• The online compiler fails to build the target Xadow-M0 with MBED 2 rev. 142 or later (checked up to 172 https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400). This is the same as Mbed 2 builds are broken (was: ff_lpc546xx: Library name 'platform' is not unique) #5887 but for the Xadow-M0 platform.

• The error message is:

Error: Library name 'platform' is not unique (defined in '/tmp/chroots/ch-61c13650-bafb-40ee-bc8b-5842d8ff86d8/extras/mbed/TARGET_LPC11U35_501/TOOLCHAIN_ARM_MICRO/mbed_lib.json' and '/tmp/chroots/ch-61c13650-bafb-40ee-bc8b-5842d8ff86d8/extras/mbed/TARGET_XADOW_M0/TOOLCHAIN_ARM_MICRO/mbed_lib.json')

• To reproduce try to compile this
  https://os.mbed.com/users/ruevs/code/xadow_m0_blinky/
  in the online compiler

• This problem was introduced in:

Rev: 142:4eea097 10 May 2017

Release 142 of the mbed library

Ports for Upcoming Targets

Fixes and Changes

4059: [Silicon Labs] Rename targets #4059
4187: [NCS36510] Reduce default heap size allocated by IAR to 1/4 of RAM #4187
4225: fixed missing device_name for xDot and removed progen #4225
4251: Fix C++11 build error w/ u-blox EVK-ODIN-W2 #4251
4236: STM32 Fixed warning related to __packed redefinition #4236
4190: LPC4088: Enable LWIP feature #4190
4260: Inherit Xadow M0 target from LPC11U35_501 #4260
4249: Add consistent button names across targets #4249

• Originally reported here:
  https://os.mbed.com/questions/79756/Xadow-M0-does-not-compile-with-mbed-abov/
  and here:
  Mbed 2 builds are broken (was: ff_lpc546xx: Library name 'platform' is not unique) #5887 (comment)

Issue request type

[ ] Question
[ ] Enhancement
[X] Bug

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOCUSTRIA-1888

[0xc0170]

cc @ARMmbed/team-seeed

[0xc0170]

The inheritance does not look good. There is target LPC11U35_501 and Xadow inherits from this one. It should be private but because there is already a target out there, must be public. This can lead to the error above.

I can fix it on master, just creating MCU_ target out of LPC11U35_501 and both targets (LPC11U35_501 and XADOW) would inherit from it.

[0xc0170]

You can test the proposed fix #11828

[ruevs]

Sorry for not reacting earlier.
I can not import mbed-dev as a library in the online compiler (in order to try replacing the 'targets/targets.json') - it "hangs" halfway on the progress bar on the "Importing Library" dialog and eventually "An error occurred while cloning the remote repository".

[0xc0170]

Please test offline if you are having an issue. mbed-dev might be too big so it timeouts, known issue.