Hello. I used to compile my code including a third-party library, "libfoo.so". Now, the vendor ships a statically linked library, "libfoo.a", instead. With this library, I run into the following error:

CC  -mt -xarch=v9 -DCOMPILE_SOL_SPARC -ftrap=%none -xlibmil  -xchip=ultra2 -xbuiltin -xO4 \
-D_REENTRANT -DNDEBUG -instances=static -I. -I/home/test/release64/include -I/home/test/release64/include \
-I/home/test/src/foo/common  -I/home/test/src/foo/foo -I/infrastructure/core/release64/include \
-I/infrastructure/core/third-party/boost_1_36_0    -xildoff -norunpath  -o /home/test/release64/bin/xyz \
/home/test/release64/obj/xyz/app.o \
\
        /home/test/release64/obj/xyz/compiledate.o -L/home/test/release64/lib \
-L/home/test/src/foo/lib/SOL_SPARC -L/infrastructure/core/release64/lib -lfoo -ldl \
-lsocket -ldemangle -lm -lnsl -lz -lsched -R /usr/lib/lwp/64 \
 
Undefined                       first referenced
 symbol                             in file
 
std::basic_string<char,std::char_traits<char>,
  std::allocator<char> >&std::basic_string<char,std::char_traits<char>,
  std::allocator<char> >::operator+=(const char*)
 
                                /home/test/src/foo/lib/SOL_SPARC/libfoo.a(app.o) 
 
[...]
 
(symbol belongs to implicit dependency /usr/lib/sparcv9/libCstd.so.1)
 
ld: fatal: Symbol referencing errors. No output written to /home/test/release64/bin/foo
*** Error code 1