> Should it still be the compilation setting issue, when compiling my library 
> or compiling FFmpeg?

When you do the final link, are you using the C or C++ compiler?  You need to 
use the C++ one.

So:
1.  C++ etc to make the library
2. cc -c your_files.c
3. C++ -llibrary your_files.o

In these errors:
> .../binutils/2.25/centos6-native/da39a3e/bin/ld: 
> .../mylibrary/0.1/gcc-4.9-glibc-2.20/80414d5/lib/libmylibrary.a(mylibrary_file.cpp.o):
>  undefined reference to symbol '_ZdlPv@@GLIBCXX_3.4'
> .../libgcc/4.9.x/gcc-4.9-glibc-2.20/024dbc3/lib/libstdc++.so: error adding 
> symbols: DSO missing from command line

“glibcxx” suggests it’s missing the C++ support library, like if you’re linking 
with cc instead of c++ compiler.



And sorry about dropping the tar on the list earlier, I thought I was replying 
off list.  My bad.

Perette

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