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RE: Question about shared library for Solaris
- From: "Lev Assinovsky" <LAssinovsky at algorithm dot aelita dot com>
- To: "komiyama" <komiyama at sddc dot sps dot mot dot com>,<gcc-help at gcc dot gnu dot org>
- Date: Tue, 20 Apr 2004 13:05:08 +0400
- Subject: RE: Question about shared library for Solaris
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@sddc.sps.mot.com]
> Sent: Tuesday, April 20, 2004 10:39 AM
> To: gcc-help@gcc.gnu.org
> 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@sddc.sps.mot.com
> --------------------------------------------------------------
> ---------
>
>