Hey y'all, (I haven't seen any traffic on this list--I hope it's ok to ask help questions here.) I'm writing an interface to Berkeley DB, and, while I can link to my wrapper library fine from C, I can't seem to do it successfully from GHC. My first attempt was: D:\src\dm>ghc -fffi test.hs db.lib libdb43.lib compilation IS NOT required Warning: .drectve `/DEFAULTLIB:"libcp" /DEFAULTLIB:"LIBC" /DEFAULTLIB:"OLDNAMES" /EXPORT:_db_info_status_pos,DATA /EXPOR T:_db_info_struct_size,DATA /EXPORT:_db_open@4 /EXPORT:_db_close@4 /EXPORT:_db_read@4 /EXPORT:_db_write@4 /EXPORT:_db_re move@4 /EXPORT:_db_info_mode_pos,DATA /EXPORT:_db_info_out_data_pos,DATA /EXPORT:_db_info_in_data_length_pos,DATA /EXPOR T:_db_info_pathname_pos,DATA /EXPORT:_db_info_error_pos,DATA /EXPORT:_db_info_in_data_pos,DATA /EXPORT:_db_info_key_leng th_pos,DATA /EXPORT:_db_info_key_pos,DATA /EXPORT:_db_info_out_data_length_pos,DATA /EXPORT:_db_info_db_name_pos,DATA ' unrecognized db.lib(Release/berk_db.obj)(.text+0xd):berk_db.cpp: undefined reference to `??2@YAPAXI@Z' db.lib(Release/berk_db.obj)(.text+0xc):berk_db.cpp: undefined reference to `_except_list' db.lib(Release/berk_db.obj)(.text+0x14):berk_db.cpp: undefined reference to `_except_list' db.lib(Release/berk_db.obj)(.text+0x5d):berk_db.cpp: undefined reference to `??_V@YAXPAX@Z' db.lib(Release/berk_db.obj)(.text+0x7e):berk_db.cpp: undefined reference to `_except_list' db.lib(Release/berk_db.obj)(.text+0x6c):berk_db.cpp: undefined reference to `??_V@YAXPAX@Z' db.lib(Release/berk_db.obj)(.text+0x78):berk_db.cpp: undefined reference to `??_U@YAPAXI@Z' ... where db.lib is my wrapper library. Taking a hint from the compiler defaultlib directives, I then did the following: D:\src\dm>ghc -fffi test.hs db.lib libdb43.lib libc.lib libcp.lib oldnames.lib compilation IS NOT required libc.lib(build/intel/st_obj/crt0.obj)(.text+0x0): In function `mainCRTStartup': f:\vs70builds\9466: multiple definition of `mainCRTStartup' D:/GHC/GHC-6.2.2/gcc-lib/crt2.o(.text+0x240):crt1.c: first defined here Warning: .drectve `/DEFAULTLIB:"libcp" /DEFAULTLIB:"LIBC" /DEFAULTLIB:"OLDNAMES" /EXPORT:_db_info_status_pos,DATA /EXPOR T:_db_info_struct_size,DATA /EXPORT:_db_open@4 /EXPORT:_db_close@4 /EXPORT:_db_read@4 /EXPORT:_db_write@4 /EXPORT:_db_re move@4 /EXPORT:_db_info_mode_pos,DATA /EXPORT:_db_info_out_data_pos,DATA /EXPORT:_db_info_in_data_length_pos,DATA /EXPOR T:_db_info_pathname_pos,DATA /EXPORT:_db_info_error_pos,DATA /EXPORT:_db_info_in_data_pos,DATA /EXPORT:_db_info_key_leng th_pos,DATA /EXPORT:_db_info_key_pos,DATA /EXPORT:_db_info_out_data_length_pos,DATA /EXPORT:_db_info_db_name_pos,DATA ' unrecognized Warning: .drectve `/merge:.CRT=.data /defaultlib:kernel32.lib /disallowlib:libcd.lib /disallowlib:libcmt.lib /disallowli b:libcmtd.lib /disallowlib:msvcrt.lib /disallowlib:msvcrtd.lib ' unrecognized Warning: .drectve `/MERGE:.rtc=.rdata ' unrecognized I assume that the warnings are no problem, but I can't figure out how to get rid of the duplicate "mainCRTStartup" symbol. This's really vexing me, as there are a number of things such as gdb support that would go a long way towards making Haskell more useable for general purpose applications (instead of the "hard" calculations at which it excels), but I just can't seem to make it work. thanks in advance, James |-----------------------------------------------| | James Mitchell | http://www.jimdesu.us | |-----------------------------------------------| |When the shoe fits, the foot is forgotten; when| |the belt fits, the belly is forgotten; when the| |heart is right, "for" and "against" are | |forgotten. -- Chuang Tzu | |-----------------------------------------------| __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/