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Date: Wed, 21 Sep 2022 15:53:15 +0200
Message-Id: <CN24O9AIQA5Y.1N9K8QRIAUFE3@sumire>
Subject: Re: iconv detection issues
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From: "alice" <alice@ayaya.dev>
To: "Riccardo Mottola" <riccardo.mottola@libero.it>, "alpine-user"
 <alpine-user@lists.alpinelinux.org>
References: <34652592-dd13-dca0-40a1-18eb43101bd9@libero.it>
In-Reply-To: <34652592-dd13-dca0-40a1-18eb43101bd9@libero.it>
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On Tue Sep 20, 2022 at 10:12 PM CEST, Riccardo Mottola wrote:
> Hi,
>
> I am trying to build GNUstep Base on alpine linux, right now on 3.16. I
> don't remember if I had issues on previous versions of Alpine Linux, I
> don't think so, but also GNUstep might have changed since the last time
> I tried.
>
> configure:11518: checking iconv support
> configure:11538: gcc -o conftest -g -O2=C2=A0 -I/Local/Library/Headers
> -I/Local/Library/Headers -I/System/Library/Headers=C2=A0=C2=A0 -shared-li=
bgcc
> -L/Local/Library/Libraries -L/Local/Library/Libraries
> -L/System/Library/Libraries conftest.c -lffi=C2=A0 -lz -lrt -ldl=C2=A0 -l=
pthread
> -lz >&5
> conftest.c: In function 'main':
> conftest.c:235:48: warning: comparison between pointer and integer
> =C2=A0 235 | { return iconv_open("UTF-8//TRANSLIT","ASCII") =3D=3D -1 ? 1=
 : 0; }
the TRANSLIT extension is not supported by musl iconv.
see: https://wiki.musl-libc.org/functional-differences-from-glibc.html#icon=
v

so, the configure test fails. if the program hard-requires this
support, then you can try use gnu-libiconv(-dev), and see how to link
that (i don't know if it's actually the same api/kind of thing..) by
modifying the configure files, passing flags, etc.
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 ^~
> configure:11538: $? =3D 0
> configure:11538: ./conftest
> configure:11538: $? =3D 1
>
> Why does it fail?
>
> On a "standard" linux machine I see:
>
> configure:11518: checking iconv support
> configure:11538: gcc -o conftest -g -O2=C2=A0 -I/Local/Library/Headers
> -I/Local/Library/Headers -I/System/Library/Headers
> -I/Local/Library/Headers -I/usr/lib64/libffi/include=C2=A0=C2=A0 -shared-=
libgcc
> -L/Local/Library/Libraries -L/Local/Library/Libraries
> -L/System/Library/Libraries -L/Local/Library/Libraries conftest.c -lffi=
=C2=A0
> -lbfd -lz -liberty -lrt -ldl=C2=A0 -lpthread -lz >&5
> conftest.c: In function 'main':
> conftest.c:246:48: warning: comparison between pointer and integer
> =C2=A0 246 | { return iconv_open("UTF-8//TRANSLIT","ASCII") =3D=3D -1 ? 1=
 : 0; }
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 ^~
> configure:11538: $? =3D 0
> configure:11538: ./conftest
> configure:11538: $? =3D 0
> configure:11543: result: yes, in libc
>
>
> So I get the same warning...=C2=A0 but different execution.
> what could be specific to alpine linux here?
>
>
> Riccardo