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Re: func_win32_import_lib_p when file is missing


From: Gary V. Vaughan
Subject: Re: func_win32_import_lib_p when file is missing
Date: Sun, 7 Oct 2012 11:04:02 +0700

Hi Peter,

On 7 Oct 2012, at 06:53, Peter Rosin <address@hidden> wrote:
> How is the below function supposed to work
> when $file_magic_cmd is '$OBJDUMP -f' and not 'func_win32_libid'?

I have no idea :(

> objdump doesn't output "import" for me, at least not for any
> import lib I have given it. Chunk?
> 
> # func_win32_import_lib_p ARG
> # True if ARG is an import lib, as indicated by $file_magic_cmd
> func_win32_import_lib_p ()
> {
>    $debug_cmd
> 
>    case `eval $file_magic_cmd \"\$1\" 2>/dev/null | $SED -e 10q` in
>    *import*) : ;;
>    *) false ;;
>    esac
> }

Does '$OBJDUMP -f' output anything that can be used to distinguish an
import library?

If so, add that to the *import* leg of the case statement above.  If not,
then file_magic_cmd should not be set to '$OBJDUMP -f' for at least that
particular combination of MSVC/objdump/mingw that you are using:

> mingw* | pw32*)
>  # Base MSYS/MinGW do not provide the 'file' command needed by
>  # func_win32_libid shell function, so use a weaker test based on 'objdump',
>  # unless we find 'file', for example because we are cross-compiling.
>  # func_win32_libid assumes BSD nm, so disallow it if using MS dumpbin.
>  if ( test "$lt_cv_nm_interface" = "BSD nm" && file / ) >/dev/null 2>&1; then
>    lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
>    lt_cv_file_magic_cmd='func_win32_libid'
>  else
>    # Keep this pattern in sync with the one in func_win32_libid.
>    lt_cv_deplibs_check_method='file_magic file format 
> (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)'
>    lt_cv_file_magic_cmd='$OBJDUMP -f'

     lt_cv_file_magic_cmd='func_win32_libid'

??

>  fi
>  ;;

HTH,
-- 
Gary V. Vaughan (gary AT gnu DOT org)


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