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From: "Christian Biesinger via gdb" <gdb@sourceware.org>
Reply-To: Christian Biesinger <cbiesinger@google.com>
Date: Sun, 29 Sep 2019 05:09:00 -0000
Message-ID: <CAPTJ0XFYtm-ngCHsc40_VqH61G80d2JWqVao_p5CYr0JAHR3QA@mail.gmail.com>
Subject: Re: GDB does not recognize cxx extension?
To: noloader@gmail.com
Cc: gdb@sourceware.org
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On Sun, Sep 29, 2019 at 12:01 AM Jeffrey Walton <noloader@gmail.com> wrote:
> I've got a C++ program built from a source called pem_test.cxx. I'm
> having trouble getting GDB to accept it. Autocomplete does not work:
>
>     (gdb) b pem_<TAB>
>     pem_common.cpp  pem_common.h    pem_read.cpp    pem_write.cpp

GDB gets the list of files from the debug data in the binary, not from
the current directory. Are you sure you compiled pem_test.cxx into the
binary?

Christian

> And breakpoints don't work:
>
>     (gdb) b pem_test.cxx : 85
>     No source file named pem_test.cxx.
>     Make breakpoint pending on future shared library load? (y or [n])
>
> The file is in PWD:
>
>     (gdb) shell ls *.cxx
>     pem_test.cxx  test.cxx
>
> I'm working on Ubuntu 18.04, using "GCC (Ubuntu
> 7.4.0-1ubuntu1~18.04.1)", "GDB (Ubuntu 8.1-0ubuntu3.1)", and
> CXXFLAGS="-DDEBUG -g3 -O0 -Wall".
>
> Searching the mailing list returns spurious hits:
> https://sourceware.org/cgi-bin/search.cgi?wm=wrd&form=extended&m=all&s=D&ul=%2Fml%2Fgdb%2F%25&q=cxx%20extension
>
> How do I have have GDB recognize the cxx extension as a C++ source file?
>
> Thanks in advance.