On 10/30/2016 2:23 PM, 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.
/********************************************/
#include <sys/cdefs.h>
#include <stdio.h>
__hidden void hello (char * str) {
printf("%s %s\n", "Hello", str);
}
int main (int argc, char ** argv) {
hello("cruel world!");
}
/********************************************/
If you're trying to write portable code, why would you assume that
__hidden is defined? It's not defined in glibc, for example, and your
sample program doesn't compile on Linux:
$ gcc test.c
test.c:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before
‘void’
Do you have a real use case where this issue came up? The sample isn't
very convincing as it stands.
Ken
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