Improve error message when exporting for make without a linker script

[theotherjimmy]

Description

The error message is a bit better.

Status

READY

Todos

• Manual test that not having a linker script causes this error

Sample output

Before

Scan: basic
Scan: env
Scan: hal
Traceback (most recent call last):
  File "project.py", line 244, in <module>
    main()
  File "project.py", line 240, in main
    zip_proj=zip_proj, build_profile=profile)
  File "project.py", line 93, in export
    build_profile=build_profile, silent=silent)
  File "D:\mbed-os-mbed-os-5.2\tools\project_api.py", line 229, in export_project
    macros=macros)
  File "D:\mbed-os-mbed-os-5.2\tools\project_api.py", line 90, in generate_project_files
    exporter.generate()
  File "D:\mbed-os-mbed-os-5.2\tools\export\cdt\__init__.py", line 14, in generate
    super(Eclipse, self).generate()
  File "D:\mbed-os-mbed-os-5.2\tools\export\makefile\__init__.py", line 82, in generate
    ctx[key] = ctx['vpath'][0] + "/" + ctx[key]
TypeError: cannot concatenate 'str' and 'NoneType' objects

After

Scan: basic
Scan: env
Scan: hal
Traceback (most recent call last):
  File "tools/project.py", line 248, in <module>
    main()
  File "tools/project.py", line 244, in main
    zip_proj=zip_proj, build_profile=profile)
  File "tools/project.py", line 94, in export
    build_profile=build_profile, silent=silent)
  File "/home/jimbri01/src/mbedmicro/mbed/tools/project_api.py", line 228, in export_project
    macros=macros)
  File "/home/jimbri01/src/mbedmicro/mbed/tools/project_api.py", line 89, in generate_project_files
    exporter.generate()
  File "/home/jimbri01/src/mbedmicro/mbed/tools/export/makefile/__init__.py", line 44, in generate
    raise NotSupportedException("No linker script found.")
tools.utils.NotSupportedException: No linker script found.

[bridadan]

Thanks for the before and after logs, LGTM

[bridadan]

/morph export-build

[mbed-bot]

Result: SUCCESS

Your command has finished executing! Here's what you wrote!

/morph export-build

Output

mbed Build Number: 67

All exports and builds passed!

[0xc0170]

/morph test

[mbed-bot]

Result: SUCCESS

Your command has finished executing! Here's what you wrote!

/morph test

Output

mbed Build Number: 1334

All builds and test passed!

[rtsysir]

why this error raise?
i build project and now can not export to gcc-arm
my gcc is 4.9

[theotherjimmy]

@rtsysir You should open a new issue for your problem and track it's progress there. Further, I would need more context to help you examine what is going wrong with your export. For example, I would need to know what your project is structured like, what version of mbed-os and mbed-cli you are using, etc. The issue template should help guide you to providing the details needed for us to help.