Hello Jonathan On 14.11.08, you wrote:
>If exceptions are enabled > __throw_logic_error will throw std::logic_error, otherwise it will > call abort(). On the amigaos compiler is sjlj enabled, i see in asm debugger after single stepping long it call std::logic_error.but this func do nothing print. so i simplyfy the testprogram and see std::logic_error("test\n"); does not output anything. I test this too on cygwin gcc 3.4 x86 compiler(on amigaos i use 4.3.2 compiler and the attached libstdc++).Its the same output(cout and assert work ok) but std::logic_error not. i look to find in sourcecode the place where logic_error do any action and print out text, but i dont find a print command. maybe you can tell me the place where logic_error do action to print, so i can set a breakpoint on that place and singlestep to see whats go wrong. -----------------------the testprog ------------------------------ #include <iostream> #include <stdexcept> int main(int argc, char *argv[]) { std::cout<<"Hallo World\n"; std::logic_error("test\n"); assert(0); } If so assert does not work when > 2008/11/12 Bernd Roesch: >> >> But in libstdc++v3/src/functexcept.cc >> >> void >> __throw_logic_error(const char*) >> { std::abort(); } >> >> this call abort and there is no string print out, because abort get no >> Parameter as far i see. >> >> How can this work ? > > It works by calling abort(), as intended. > > If you take another look in functexcept.cc you'll see that when > __EXCEPTIONS is defined the following definition is used: > > void > __throw_logic_error(const char* __s) > { throw logic_error(_(__s)); } > > This allows the library to call __throw_logic_error without caring > whether the target supports exceptions, or whether they have been > disabled with -fno-exceptions. If exceptions are enabled > __throw_logic_error will throw std::logic_error, otherwise it will > call abort(). > > It seems that the 68k amigaos port does not support exceptions, or > your GCC was configured without support for exceptions. > > Hope that helps, > > Jonathan Regards