Re: [PATCH 00/11] C++/MinGW patches

Qian Hong
2015-11-03T10:47:23Z

Hi Pedro,

On Tue, Nov 3, 2015 at 4:46 AM, Pedro Alves <palves@redhat.com> wrote:
> Thanks! Note you'll need to configure gdb with --enable-build-with-cxx
> in order to make it build with a C++ compiler.

I think I have some interesting testing result for you ;-)

I compiled latest gdb in your branch on MSYS2 on Windows [1], with my
additional modification to enable build-with-cxx.

It compiles fine. However, when debugging a simple hello world
program, I got error below:
"This application has requested the Runtime to terminate it in an
unusual way. Please contact the application's support team for more
information." when debugging a simple hello world program. "

Steps to reproduce:
1. $ cat hello.c
# include <stdio.h>
int main(void)
{
int a = 10;
printf("haha a is %d\n", 10);
return 0;
}

2. compile with MSYS2 mingw gcc
$ gcc hello.c -g -O0 -o hello.exe

3. debugging hello.exe with gdb (build with cxx)
$ gdb hello.exe

3.1. set a breakpoint on main()
3.2. type `c`

expect result:
gdb should report that the program is not start yet.

actual result:
gdb exit with error message: "This application has requested the
Runtime to terminate it in an unusual way. Please contact the
application's support team for more information." when debugging a
simple hello world program. "

Then I tried build gdb again without build-with-cxx, and this error
disappear, gdb works as expect, at least for simple hello world.

Cross-reference: feature request for gdb-git package in MSYS2 [2]

[1] https://github.com/Alexpux/MINGW-packages/tree/master/mingw-w64-gdb-git
[2] https://github.com/Alexpux/MINGW-packages/issues/862

--
Regards,
Qian Hong

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