On 10/30/2016 5:09 PM, Brian Inglis wrote: > On 2016-10-30 12:23, cyg Simple wrote: >> The below sample code will give a warning that visibility isn't >> supported in this configuration. Either the GCC build is incorrect or >> the sys/cdefs.h needs to be modified to define __hidden to empty. > > https://cygwin.com/ml/cygwin/2005-08/msg01057.html >
I figured that out but that means sys/cdefs.h as delivered needs to ... > gcc wiki demonstrates what needs to be done instead: > > https://gcc.gnu.org/wiki/Visibility#line-76 > > at a minimum add `&& !define(__CYGWIN__)`; other posts also exclude consider this and define __hidden and other visibility helper macros as empty. > MinGW and ARM-PE (W10 Surface, IoT) targets using PE format not ELF; > gcc notes not all ELF targets support this: > If others deliver a sys/cdefs.h then it should at least declare these helper macros as empty but that isn't for this list. > https://gcc.gnu.org/onlinedocs/gcc-3.3.5/gcc/Function-Attributes.html#index-_0040code_007bvisibility_007d-attribute-1624 > > > Which raises the interesting question - anyone tried porting Cygwin > to non-x86 arch? > Maybe but I don't know. -- cyg Simple -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple