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Date: Mon, 12 Aug 2019 11:16:39 -0700
From: Khem Raj <raj.khem@...il.com>
To: musl@...ts.openwall.com
Subject: Re: Re: size of executable
On Mon, Aug 12, 2019 at 10:19 AM Rich Felker <dalias@...c.org> wrote:
>
> On Mon, Aug 12, 2019 at 05:55:28PM +0100, Jorge Almeida wrote:
> > On Mon, Aug 12, 2019 at 5:48 PM Jorge Almeida <jjalmeida@...il.com> wrote:
> > >
> >
> > > with gcc-8.3.0 on x86_64. Could someone check the following hello.c
> > > and see what size you get?
> > > I get 16768 bytes (not stripped) and 12324 (stripped).
> > > Note that I'm not even using printf.
> > >
> > > Thanks
> > >
> > > #include <unistd.h>
> > > int main(int argc, char* argv[]){
> > > write(1, "Hello, bloated world...\n", 24);
> > > }
> >
> > Sorry, I forgot to add the compile options. In attachement, due to
> > Gmail interface being what it is.
>
> > gcc -static -Os -march=native -fomit-frame-pointer -pipe -Wall -Werror=pedantic -Werror=implicit-function-declaration -pedantic -pedantic-errors -mpreferred-stack-boundary=4 -falign-functions=1 -falign-jumps=1 -falign-loops=1 -fno-unwind-tables -fdata-sections -ffunction-sections -Wl,--gc-sections -fno-asynchronous-unwind-tables -fstrict-aliasing -Wstrict-aliasing=2 -Wno-unused-function -std=c11 hello.c
> >
> > Stripping:
> >
> > strip -s a.out
> > strip -S --strip-unneeded --remove-section=.note.gnu.gold-version --remove-section=.comment --remove-section=.note --remove-section=.note.gnu.build-id --remove-section=.note.ABI-tag --remove-section=.eh_frame --remove-section=.eh_frame_ptr -R .note -R .comment -R .note.GNU-stack a.out
> > sstrip a.out
>
> This is a binutils regression from a dubious anti-ROP feature, -z
> separate-code. Add -Wl,-z,noseparate-code and it will go away.
>
is this still so with latest release as well.
> FYI musl-cross-make has been updated to change the default back in
> toolchains it builds.
>
> Rich
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