glibc uses the following "technique" to generate link warnings...
#define link_warning(symbol, msg) \
__make_section_unallocated (".gnu.warning." #symbol) \
static const char __evoke_link_warning_##symbol[] \
__attribute__ ((used, section (".gnu.warning." #symbol __sec_comment))) \
= msg;
For a particular link warning generated by this, is there any command-line switch that can be passed to ld or gcc in order to suppress it?
(For compile-time warnings you can suppress with `#pragma diagnostic foo ignore")
is there any command-line switch that can be passed to ld or gcc in order to suppress it
No.