Re: lib-symbol-versions on msvc9

[Bruno Haible]

Hi Simon,

Simon Josefsson wrote in
<https://lists.gnu.org/archive/html/help-libidn/2012-01/msg00003.html>:
> > * mingw with MSVC 9 as compiler
> >
> > Link failure:
> >
> >   CCLD   libidn.la
> > cl : command line warning D9002 : ignoring unknown option "--version-
> > script=./libidn.map"
> > cl : Befehlszeile warning D9002 : ignoring unknown option "-dll"
> > LINK : fatal error LNK1181: cannot open input file "ink.lib"
> > make[2]: *** [libidn.la] Error 2
> 
> I don't have that environment, but can you test whether applying this
> patch to gnulib and running
> 
> rm -rf m && ./gnulib-tool --create-testdir --dir m lib-symbol-versions && cd 
> m && autoreconf && ./configure
> 
> helps?  It is a bit weird approach, but simple.
> 
> /Simon
> 
> diff --git a/m4/ld-version-script.m4 b/m4/ld-version-script.m4
> index fd8c043..5ed93ef 100644
> --- a/m4/ld-version-script.m4
> +++ b/m4/ld-version-script.m4
> @@ -1,4 +1,4 @@
> -# ld-version-script.m4 serial 2
> +# ld-version-script.m4 serial 3
>  dnl Copyright (C) 2008-2012 Free Software Foundation, Inc.
>  dnl This file is free software; the Free Software Foundation
>  dnl gives unlimited permission to copy and/or distribute it,
> @@ -26,6 +26,12 @@ AC_DEFUN([gl_LD_VERSION_SCRIPT],
>      save_LDFLAGS="$LDFLAGS"
>      LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
>      cat > conftest.map <<EOF
> +foo
> +EOF
> +    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
> +                   [accepts_syntax_errors=yes], [accepts_syntax_errors=no])
> +    if test "$accepts_syntax_errors" = no; then
> +      cat > conftest.map <<EOF
>  VERS_1 {
>          global: sym;
>  };
> @@ -34,8 +40,11 @@ VERS_2 {
>          global: sym;
>  } VERS_1;
>  EOF
> -    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
> -                   [have_ld_version_script=yes], [have_ld_version_script=no])
> +      AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
> +                     [have_ld_version_script=yes], 
> [have_ld_version_script=no])
> +    else
> +      have_ld_version_script=no
> +    fi
>      rm -f conftest.map
>      LDFLAGS="$save_LDFLAGS"
>      AC_MSG_RESULT($have_ld_version_script)

Yes, perfectly fine. Before the patch,
"checking if LD -Wl,--version-script works..."
answered 'yes' on
  glibc, FreeBSD, NetBSD, OpenBSD, IRIX, Cygwin, mingw, msvc9
and 'no' on
  MacOS X, AIX, HP-UX, Solaris.

With the patch, the answer turns to 'no' on msvc9. Exactly as it should.

Bruno