I was getting compile time issues on ubuntu ( only as of todays git pull though... which is strange ) src/switch_core.c: In function ‘switch_system_fork’: src/switch_core.c:2405: error: ignoring return value of ‘system’, declared with attribute fixed it by making like 2405 of switch_core.c if ( system(cmd) ) {}; seems related to https://wiki.ubuntu.com/CompilerFlags error: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result The return value from system(), write(), and similar functions should be evaluated and handled appropriately. In cases where one absolutely must throw away the return value, it can be discarded with an empty test: if (system("...")) { } , though this is not recommended. maybe a better solution would be to change compiler flags... not sure... just letting someone smarter than me know about it :) -- Sincerely Jay