libltdl + dlopen/LoadLibrary [Was: Re: gcc 3.3.1-3, loading .la files from gcj-compiled apps]
Charles Wilson
cygwin@cwilson.fastmail.fm
Sun Nov 2 20:16:00 GMT 2003
Christopher Faylor wrote:
> On Sun, Nov 02, 2003 at 12:20:47PM -0700, Marcus G. Daniels wrote:
>
>>Would it be possible to add a -D_WIN32 to the libjava/libltdl Makefile
>>for Cygwin? Then the LoadLibrary support will get compiled-in, and
>>dynamic libraries can be loaded into GCJ apps.
>
>
> No. If there is dynamic linking to be done it should work through
> dlopen and pals. Defining _WIN32 is not the way to accomplish this.
>
Hmmm... I've been having problems compiling cvs-m4 which HEAVILY uses
the libltdl library-loading functionality. I wonder if it could be
related to this:
From ltdl.c:
#if __CYGWIN__
{
char wpath[MAX_PATH];
cygwin_conv_to_full_win32_path(searchname, wpath);
module = LoadLibrary(wpath);
}
#else
module = LoadLibrary (searchname);
#endif
LT_DLFREE (searchname);
It appears that current libtool does in fact use LoadLibrary and not
dlopen. This worked fine in the past (perhaps pre-1.5.0?) but appears
to not work as well anymore.
Should the module-loading functionality in libtoool for cygwin be
reworked to use dlopen instead?
--
Chuck
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