Can't build PROS project on MacOS

Programming Support PROS Support
#1

Hello, I’m currently trying to build a PROS project but when I run ‘prosv5 make’, I get the error:

-e \x1b[31;01m[ERRORS]\x1b[0m
/usr/local/Cellar/arm-gcc-bin/8-2019-q3-update/bin/../lib/gcc/arm-none-eabi/8.3.1/../../../../arm-none-eabi/bin/ld: /usr/local/Cellar/arm-gcc-bin/8-2019-q3-update/bin/../lib/gcc/arm-none-eabi/8.3.1/../../../../arm-none-eabi/lib/libstdc++.a(cxx11-ios_failure.o): in function `(anonymous namespace)::__io_category_instance()':
cxx11-ios_failure.cc:(.text._ZN12_GLOBAL__N_122__io_category_instanceEv+0xc): undefined reference to `__sync_synchronize'
/usr/local/Cellar/arm-gcc-bin/8-2019-q3-update/bin/../lib/gcc/arm-none-eabi/8.3.1/../../../../arm-none-eabi/bin/ld: /usr/local/Cellar/arm-gcc-bin/8-2019-q3-update/bin/../lib/gcc/arm-none-eabi/8.3.1/../../../../arm-none-eabi/lib/libstdc++.a(locale.o): in function `std::locale::_Impl::_M_install_cache(std::locale::facet const*, unsigned int)':
locale.cc:(.text._ZNSt6locale5_Impl16_M_install_cacheEPKNS_5facetEj+0x18): undefined reference to `__sync_synchronize'
/usr/local/Cellar/arm-gcc-bin/8-2019-q3-update/bin/../lib/gcc/arm-none-eabi/8.3.1/../../../../arm-none-eabi/bin/ld: /usr/local/Cellar/arm-gcc-bin/8-2019-q3-update/bin/../lib/gcc/arm-none-eabi/8.3.1/../../../../arm-none-eabi/lib/libstdc++.a(locale_init.o): in function `(anonymous namespace)::get_locale_mutex()':
make: *** [bin/monolith.elf] Error 1
locale_init.cc:(.text._ZN12_GLOBAL__N_116get_locale_mutexEv+0xc): undefined reference to `__sync_synchronize'
collect2: error: ld returned 1 exit status
Error: Failed to build

How should I got about fixing this? If you need more information just let me know, thank you in-advance.

#2

Add a file to the src folder named whatever you like and put

void __sync_synchronize(void) {
__sync_synchronize();
}

In that file.

You don’t need to include it anywhere, just run make again

#3

I was able to get it working, thank you for your help!

#4

PROS 3.2.0 fixes this issue so you won’t need to deal with it yourself: