Error running make twice in makefile project

[matthew-macovsky-cypress]

Description

Running the following sequence of commands:

mbed import mbed-os-example-blinky cd mbed-os-example-blinky/mbed-os git checkout master cd .. mbed export -m CY8CPROTO_062_4343W -i eclipse_gcc_arm make make

results in the output:

g++ .././mbed-os/platform/cxxsupport/mstd_mutex.cpp -o .././mbed-os/platform/cxxsupport/mstd_mutex .././mbed-os/platform/cxxsupport/mstd_mutex.cpp:18:10: fatal error: mstd_mutex: No such file or directory

include

      ^~~~~~~~~~~~

compilation terminated. make[1]: [: .././mbed-os/platform/cxxsupport/mstd_mutex] Error 1 make: [Makefile:26: all] Error 2

I believe the issue is the result of the following:

1. On the first run of make, dependency (.d) files are created, listing mstd_mutex as a dependency of mstd_mutex.cpp
2. On the second run of make, the dependency files are included
3. Make is unable to match mstd_mutex to a rule, and so
4. Make uses a default rule to attempt to compile mstd_mutex as an object file

I believe that a possible solution is to add the line %: ; to the end of the Makefile template. This would provide a default do-nothing rule for files that do not match other rules (such as mstd_mutex) and should not affect other targets.

Issue request type

[ ] Question
[ ] Enhancement
[x] Bug

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOCUSTRIA-1717

[0xc0170]

@matthew-macovsky-cypress Can you create PR with a fix?

cc @ARMmbed/mbed-os-tools