At 01:31 AM 8/27/2004, you wrote: >Yu-Cheng Chou wrote: > >>Hi, Larry: >>I have two c-callable static libs which are created by vc, but the source codes are >>not available. >>I need these libs to create a shared library using gcc under cygwin. >>Command line: >>gcc -shared -o libmpi.dl mpi_chdl.o ../../src/lib/libmpi.a ../../src/lib/liblam.a >>../../src/lib/chsd >>k.lib ../../src/lib/ch.lib >>Error message: >>Warning: .drectve '/DEFAULTLIB:"MSVCRT" /DEFAULTLIB:"OLDNAMES" /EXPORT:___b >>uiltin_Ch_VaArg ' unrecognized >>Cannot export .idata$4: symbol not found >>Cannot export .idata$5: symbol not found >>Cannot export .idata$6: symbol not found >>Cannot export .text: symbol not found >>Cannot export ⌂ch_NULL_THUNK_DATA: symbol not found >>collect2: ld returned 1 exit status >>make: *** [libmpi.dl] Error 1 >>Have any idea to fix this problem? > >AFAIK, you can't do that in that way. > >First, you have to build shared library (DLL in terms of Windoze), with VC. Then you >can export API calls to .def and create .a from there on. Well of course you can >generate .def from VC compilation and then generate .a lib. But this applies only to >shared libs.
You can do this too with gcc if you extract the objects from the lib. Since Yu-Cheng mentioned that the source for these libs isn't available, there's not an obvious advantage to converting the static lib to a DLL with VC, unless it's available and one is more comfortable with it than gcc. YMMV. ;-) -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 838 Washington Street (508) 893-9889 - FAX Holliston, MA 01746 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
