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.
To my knowledge it's not possible to do this with static libs.
--
Jani Tiainen
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