http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53611
Bug #: 53611
Summary: class with hidden visibility cause function returns
pointer to class also be hidden
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: kirbyz...@sogou-inc.com
[root@djt-17-109-v06 tmp]# cat tvisi.cpp
extern "C" typedef struct __cook cook_t;
extern "C" cook_t* myopen();
struct __attribute__ ((visibility ("hidden"))) __cook {
virtual ~__cook() = 0;
};
//__attribute__ ((visibility ("default")))
cook_t* myopen()
{
return 0;
}
[root@djt-17-109-v06 tmp]# g++ tvisi.cpp -o libxx.so -shared -fPIC && nm -D
libxx.so | fgrep myopen
00000000000005cc T myopen
The function myopen is exported by g++ 4.4.6
[root@djt-17-109-v06 tmp]# g++47 tvisi.cpp -o libxx.so -shared -fPIC && nm -D
libxx.so | fgrep myopen
[root@djt-17-109-v06 tmp]#
The function myopen is not exported by g++ 4.7.0
Workaround: define '__cook' after the definition of 'myopen'
