For the record the specific autoconf macro:
AC_SEARCH_LIBS([__atomic_load_8],[atomic], ...)
Produces this test code:
"
| #ifdef __cplusplus
| extern "C"
| #endif
| char __atomic_load_8 ();
| int
| main ()
| {
| return __atomic_load_8 ();
| ;
| return 0;
| }
"
Which produces this (on all buildd's including the working ones):
"
conftest.cpp:56:6: error: new declaration 'char __atomic_load_8()'
ambiguates built-in declaration 'long long unsigned int
__atomic_load_8(const volatile void*, int)' [-fpermissive]
char __atomic_load_8 ();
^~~~~~~~~~~~~~~
conftest.cpp: In function 'int main()':
conftest.cpp:60:25: error: too few arguments to function 'long long
unsigned int __atomic_load_8(const volatile void*, int)'
return __atomic_load_8 ();
^
"
"checking for library containing __atomic_load_8... no"
Amos
