10_MessageChannel built into a 2.9MB swf file

[trungnq97]

10_MessageChannel built into a 2.9MB swf file

[trungnq97]

When building with -O4 -flto-api=exports.txt, my swf file now is only 212K. The exports.txt is taken from example 9 pthreads. Still this exports.txt is mysterious to me. Can anybody explain where these symbols come from? (Or how to build this list of symbols?).

built in symbols that must always be preserved

_start1
malloc
free
memcpy
memmove
flascc_uiTickProc
_sync_synchronize

symbols for C++ exception handling

_Unwind_SjLj_Register
_Unwind_SjLj_Resume
_Unwind_SjLj_Unregister
_Unwind_SjLj_RaiseException

symbols specific to libVGL

vglttyioctl

I did two simple tests:

Remove
"

symbols specific to libVGL

vglttyioctl
"
.. no output from printf

Remove
"

symbols for C++ exception handling

_Unwind_SjLj_Register
_Unwind_SjLj_Resume
_Unwind_SjLj_Unregister
_Unwind_SjLj_RaiseException
"
.. the swf stops working.

[cbakgly]

These are native symbols in libc.
If you ever write a helloworld.cpp, don't you wonder how such a small app prints out "hello world"?
Never forget you have OS/Libs supporting you. Now you bring part of them along in your swf file to support you again.