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Date: Sun, 21 Aug 2011 11:32:33 +0800
From: JonY <jon_y AT users DOT sourceforge DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: x86_64-w64-ming32-g++ file not recognized by objdump
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On 8/21/2011 10:09, Sisyphus wrote:
>=20
> ----- Original Message ----- From: "Thomas D. Dean"
>=20
>> #include <vector>
>> #include <string>
>> using namespace std;
>> int main() {
>>  vector<string> vs;
>>  vs.push_back("asdf");
>> }
>>
>> If I compile with g++, I get an executable that works, i.e. runs without
>> error.  This file is recognized by objdump and cygcheck.
>>
>> If I compile with x86_64-w64-ming32-g++ -m64 t.cc -o t
>=20
> I presume the 'ming32' is a typo.
> Is the '-m64' necessary ?
> What happens if you remove it from the command ?
>=20
> I can't reproduce the error you get (either with or without '-m64'),
> though I'm just running mingw in the cmd.exe shell - not under Cygwin.
>=20
>> the resulting executable produces an error message
>>> ./t.exe
>> t.exe: error while loading shared libraries: ?: cannot open shared
>> object file: no such file or directory.
>>> objdump -p ./t.exe
>> objdump: ./t.exe: File format not recognized
>=20
> I think that's to be expected - objdump expects to look at a 32-bit
> executable.
> I get the same error when I run objdump on a 64-bit executable.
> Try:
> x86_64-w64-mingw32-objdump -p ./t.exe
>=20

Hi Thomas,

you are probably missing the runtime DLLs from path. They should be
found in "/usr/x86_64-w64-mingw32/sys-root/mingw/bin".



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