[cfe-dev] libcxx install location?

[Larry Evans]

On 02/05/11 09:09, Jean-Daniel Dupas wrote:
[snip]
> After theses changes, I was able to compile a simple hello world program.
> 
> --------- hello.cpp
> #include <iostream>
> 
> int main (int argc, char * const argv[]) {
>     // insert code here...
>     std::cout << "Hello, World!\n";
>     return 0;
> }
> ------------------------
> 
> Unfortunalty, this simple code does not run properly. It prints "Hello
> World", and then a lot of garbage (and sometimes segfault too).
> 
> But this may be a good base to start hacking on libc++.
> 

The attached code, with:

  #define EMTPY_STDOUT_STR

runs OK; however, with:

  //#define EMTPY_STDOUT_STR

it prints the "?" followed by a bunch of garbage just like you
describe.

I did try gdb and after a *lot* of stepping through many statement,
finished with:

(gdb) s
std::__1::__stdoutbuf<char>::sync (this=<value optimized out>) at
../include/__std_stream:202
(gdb) s
(gdb) s
Line number 287 out of range; ../src/iostream.cpp has 53 lines.
(gdb) s
std::__1::codecvt<char, char, __mbstate_t>::unshift (this=<value
optimized out>) at ../include/__locale:745
(gdb) s
Die: DW_TAG_restrict_type (abbrev 191, offset 0xf53ba)
  parent at offset: 0x79b11
  has children: FALSE
  attributes:
    DW_AT_type (DW_FORM_ref4) constant ref: 0x94ec8 (adjusted)
Die: DW_TAG_restrict_type (abbrev 191, offset 0xf53ba)
  parent at offset: 0x79b11
  has children: FALSE
  attributes:
    DW_AT_type (DW_FORM_ref4) constant ref: 0x94ec8 (adjusted)
Dwarf Error: Cannot find type of die [in module /usr/lib/libc++.so.1]
(gdb)

After that, tried further stepping; however, nothing changed so I
finally had to kill it.

I don't know what to conclude from that, but maybe others can
glean some useful information and hopefully provide some
suggestions about how to find the problem.

-Larry


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