If the "ext/pb_ds/exception.hpp" is included (directly or indirectly) in more
than one separate compilation units, all of its __throw_... functions are
redefinition.
Fox example:
=========== main.cc ===========
#include"someclass.h"
int main(int argc,char *argv[])
{
return(0);
}
=========== someclass.h ===========
#include<ext/pb_ds/exception.hpp> // in gcc 4.2
/*
#include<ext/pb_ds/assoc_container.hpp> // in gcc 4.3.0
#include<ext/pb_ds/trie_policy.hpp>
#include<ext/pb_ds/tag_and_trait.hpp>
*/
class someclass
{
// I want to use pat_trie here.
};
=========== someclass.cc ===========
#include"someclass.h"
====================================
$ g++ main.cc someclass.cc
someclass.cc:(.text+0x0): multiple definition of
`pb_ds::__throw_resize_error()'
/tmp/cc8LPB2N.o:main.cc:(.text+0x12): first defined here
/tmp/ccl19hyr.o: In function `pb_ds::__throw_join_error()':
someclass.cc:(.text+0x52): multiple definition of `pb_ds::__throw_join_error()'
/tmp/cc8LPB2N.o:main.cc:(.text+0x64): first defined here
/tmp/ccl19hyr.o: In function `pb_ds::__throw_insert_error()':
someclass.cc:(.text+0xa4): multiple definition of
`pb_ds::__throw_insert_error()'
/tmp/cc8LPB2N.o:main.cc:(.text+0xb6): first defined here
/tmp/ccl19hyr.o: In function `pb_ds::__throw_container_error()':
someclass.cc:(.text+0xf6): multiple definition of
`pb_ds::__throw_container_error()'
/tmp/cc8LPB2N.o:main.cc:(.text+0x108): first defined here
collect2: ld returned 1 exit status
===========
My solution is to change all of _throw__... functions into inline ones.
--
Summary: __throw_* functions in ext/pb_ds/exception.hpp cause
multiple definition errors
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: chalathip at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36612
