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Subject: Re: [ANNOUNCEMENT] [Updated] mingw64-{i686,x86_64}-gcc-7.3.0-1 (Test)
To: cygwin AT cygwin DOT com
References: <announce DOT 788f6953-7b20-67c1-1dca-b65a200e0211 AT gmail DOT com> <5b7b846f DOT 1c69fb81 DOT fdb19 DOT 08eb AT mx DOT google DOT com>
From: JonY <10walls AT gmail DOT com>
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Date: Fri, 24 Aug 2018 10:11:42 +0000
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From: JonY <10walls AT gmail DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <c80de729-677c-5125-e703-efb784e8febe AT gmail DOT com>
Subject: Re: [ANNOUNCEMENT] [Updated] mingw64-{i686,x86_64}-gcc-7.3.0-1 (Test)
References: <announce DOT 788f6953-7b20-67c1-1dca-b65a200e0211 AT gmail DOT com>
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On 08/21/2018 03:18 AM, Steven Penny wrote:
> On Wed, 18 Jul 2018 10:38:22, JonY wrote:
>> The mingw-w64 cross compilers have been updated:
>>
>> * mingw64-i686-gcc-7.3.0-1
>> * mingw64-x86_64-gcc-7.3.0-1
>>
>> It is available under the test version.
>=20
> http://cygwin.com/ml/cygwin/2018-07/msg00168.html
>=20
> Using this file:
>=20
> =C2=A0=C2=A0 $ cat stoi.cpp
> =C2=A0=C2=A0 #include <iostream>
> =C2=A0=C2=A0 #include <string>
> =C2=A0=C2=A0 main() {
> =C2=A0=C2=A0=C2=A0=C2=A0 std::string q =3D "23456";
> =C2=A0=C2=A0=C2=A0=C2=A0 std::cout << std::stoi(q) << std::endl;
> =C2=A0=C2=A0 }
>=20
> I have noticed an issue with the Cygwin "x86_64-w64-mingw32-g++"
> compiler. If I
> strip the executable, all is well:
>=20
> =C2=A0=C2=A0 $ time x86_64-w64-mingw32-g++ -s -static-libstdc++ stoi.cpp;=
 wc -c a.exe
> =C2=A0=C2=A0 real=C2=A0=C2=A0=C2=A0 0m0.889s
> =C2=A0=C2=A0 845824 a.exe
>=20
> Same with Msys2:
>=20
> =C2=A0=C2=A0 # time x86_64-w64-mingw32-g++ -s -static-libstdc++ stoi.cpp;=
 wc -c a.exe
> =C2=A0=C2=A0 real=C2=A0=C2=A0=C2=A0 0m0.718s
> =C2=A0=C2=A0 835584 a.exe
>=20
> However if I do not strip the executable, the compile time nearly
> triples and
> the size increases 10 fold:
>=20
> =C2=A0=C2=A0 $ time x86_64-w64-mingw32-g++ -static-libstdc++ stoi.cpp; wc=
 -c a.exe
> =C2=A0=C2=A0 real=C2=A0=C2=A0=C2=A0 0m2.340s
> =C2=A0=C2=A0 11695660 a.exe
>=20
> Compare with Msys2, where the time only increases 17%, and the size only
> increases 3 fold:
>=20
> =C2=A0=C2=A0 # time x86_64-w64-mingw32-g++ -static-libstdc++ stoi.cpp; wc=
 -c a.exe
> =C2=A0=C2=A0 real=C2=A0=C2=A0=C2=A0 0m0.842s
> =C2=A0=C2=A0 3001138 a.exe


Can you try breaking it down by phases?
1. Preprocessor phase with -E -o file.ii
2. Compile phase (compile output from phase 1) with -c
3. Link phase, point gcc to the output from phase 2.



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