I'm developing a commercial software for MCU which is built by GNU ARM Embedded Toolchain. I want to sell the device (product) and I don't want the source code to be released.
When I compile my code using a -Wl,--verbose I see my program uses these libraries:
libc, libm, libgcc
So my question is: can I use them for my purposes?
I understand, according to license.txt, that libc is a newlib or newlib-nano and I need to be careful, because each part is under different license, right?
What about other libraries used (libm, libgcc, libstdc++ , crtend, crtn, .. ) not covered in license.txt, can I use them for my purporses? Under which license are they released?