Go to:
# Project Properties -> C/C++ Build -> Settings -> MCU G++ Linker -> Libraries
For all third party libraries that are explicitly linked.
In my case it was only ":libtouchgfx-float-abi-hard.a"
It also links against the standard library for C and/or C++.
Go to
# Project Properties -> C/C++ Build -> Settings -> MCU G++ Linker -> General
And check "Verbose". The clean and build.
It should list all O-files that are linked by the linker.
attempt to open PATH_TO_o_FILE.o succeeded
...
attempt to open PATH_TO_a_FILE.a succeeded
...
Of course there could be C/C++ code or macros inside header files that are compiled inside all your source files. Those don't show up in the linker.
Using regex I was able to extract this list of linked external libraries from my project:
crt0.o
crtbegin.o
crtend.o
crti.o
crtn.o
libc.a
libc_nano.a
libgcc.a
libm.a
libnosys.a
libstdc++_nano.a
libsupc++_nano.a
You can also check your .map file in your build folder. In it you can see which function from which library gets put at which address.
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