When you linking g++ .o forget about ld. Use just g++! ---- Lev Assinovsky Aelita Software Corporation (now is a part of Quest Software) O&S InTrust Framework Division, Team Leader ICQ# 165072909 > -----Original Message----- > From: komiyama [mailto:komiyama@xxxxxxxxxxxxxxxx] > Sent: Tuesday, April 20, 2004 10:39 AM > To: gcc-help@xxxxxxxxxxx > Subject: Question about shared library for Solaris > > > Hi GCC experts, > > I have a question about Shared library that compiled with Gcc > for Solaris. > > With above example code, > > ---------- test1.h ----------------------------------------------- > class class1 { > > public: > ~class1 (); > > void func1 (); > > }; > ---------- test1.cc ---------------------------------------------- > #include <stdexcept> > #include "test1.h" > > using namespace std; > > void class1::func1 () { > > throw runtime_error ("This is erro "); > > } > > > class1::~class1 () { > > cout << "Class1 destructor is called " << endl; > > } > --------- main.cc ------------------------------------------------- > #include "test1.h" > #include <stdexcept> > > using namespace std; > > class except_1 {}; > > class class2 { > > public: > ~class2 () { > cout << "Class2 destructor is called "<< endl; > } > > void func1() { throw except_1 (); } > > > void func2 () { throw runtime_error ("Error from class2"); } > > }; > > int main () { > > class2 test2; > > try { > test2.func1(); > } > catch ( except_1& e ) { > cout << "Catch except1 " << endl; > } > > > try { > test2.func2(); > } > catch ( runtime_error& e ) { > cout << "Catch except2 " << e.what() << endl; > } > > try { // This try block ignored (1) > class1 test; > test.func1(); > } > catch ( runtime_error& e ) { > cout << "Catch except2 "<< e.what () << endl; > } > } > ------------------------------------------------------------------- > > When I create executable with Makefile1, the generated executable > is crashed with, > > > Catch except1 > Catch except2 Error from class2 > Abort <---- > > It seems that try catch block (1) seems to ignored. > > ---------- Makefile1 ---------------------------------------------- > > SHARE_OBJ = test1.o > > > .cc.o : > g++ -g -fPIC -c -o $@ -save-temps $< > > > libshared.so: ${SHARE_OBJ} > /usr/ccs/bin/ld -G -o $@ ${SHARE_OBJ} > > test: main.o libshared.so > g++ -v -o $@ $< -L. -L/usr/local/gcc/2.95.3/lib > -lshared -lstdc++ > > clean: > -/bin/rm *.o *.so > > -------------------------------------------------------------- > --------- > > But when I compiled with Makefile2, generated executable run without > any problems. > > The only difference is when created shared library, in the > failed case, > it directory called /usr/ccs/bin/ld ,but passed case it > called /usr/ccs/bin/ld > through g++ compiler driver. > > ( It seems that g++ called collect2 and collect2 called > /usr/ccs/bin/ld) > > So my questions are, > 1: What does collect2 do when it passed data to /usr/ccs/bin/ld ? > 2: Is it possible to work with only /usr/ccs/bin/ld ? > ( Does not use g++ compiler driver when create shared object ) > > Environemnt is > O.S : Solaris8 (Sparc) > Gcc : 2.95.3 > > > -------------------- Makefile2 > ---------------------------------------- > SHARE_OBJ = test1.o > > > .cc.o : > g++ -g -fPIC -c -o $@ -save-temps $< > > > libshared.so: ${SHARE_OBJ} > g++ -v -G -o $@ ${SHARE_OBJ} -lc > > test: main.o libshared.so > g++ -v -o $@ $< -L. -L/usr/local/gcc/2.95.3/lib > -lshared -lstdc++ > > clean: > -/bin/rm *.o *.so > > ---------------------------------------------------------------------- > > > Takeo Komiyama > > -------------------------------------------------------------- > --------- > Takeo Komiyama > Voice : +81-22-377-9767 Fax : +81-22-377-9709 > ESLD design , CSG > Semiconductor Products Division , Nippon Motorola Ltd. > 2-9-1 , Akedori, Izumiku, Sendai-shi, Miyagi-ken 981-32 > Email : komiyama@xxxxxxxxxxxxxxxx > -------------------------------------------------------------- > --------- > >
