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libltdl + dlopen/LoadLibrary [Was: Re: gcc 3.3.1-3, loading .la filesfrom gcj-compiled apps]
- From: Charles Wilson <cygwin at cwilson dot fastmail dot fm>
- To: cygwin at cygwin dot com
- Date: Sun, 02 Nov 2003 15:13:56 -0500
- Subject: libltdl + dlopen/LoadLibrary [Was: Re: gcc 3.3.1-3, loading .la filesfrom gcj-compiled apps]
- References: <3FA5590F.6060308@santafe.edu> <20031102194409.GB15320@redhat.com>
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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