https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81234
Bug ID: 81234
Summary: [regression] flexible array member not at end of
‘struct
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Hi-Angel at yandex dot ru
Target Milestone: ---
This code used to work prior to gcc-7.1 (it worked on 4.x, and — I just tested
— 6.3 works too, with a warning though):
struct DataPacket {
/* … */
unsigned szdata;
char data[];
};
struct AckPacket {
DataPacket header;
int a,b,c;
};
int main() { return 0; }
However gcc-7.1 bails out with:
λ g++ test.cpp -o a
test.cpp:4:12: error: flexible array member ‘DataPacket::data’ not at
end of ‘struct AckPacket’
char data[];
^
test.cpp:9:6: note: next member ‘int AckPacket::a’ declared here
int a,b,c; /* no data below */
^
test.cpp:7:8: note: in the definition of ‘struct AckPacket’
struct AckPacket {
Imo the code is fine. Though I'm open to suggestions into a better design too.
