Re: compiling C library under mingw

It is an exe don't I need a dll?
Can you get more specific on "either directly or by manually creating an
import library"? What I understand by directly is that I should rename
postgres.exe to postgres.dll.
Thank you for responding so quickly.

On Sat, Oct 9, 2010 at 12:44 PM, Magnus Hagander <magnus(at)hagander(dot)net>wrote:

> You need to link to postgres.exe - either directly or by manually
> creating an import library.
>
> //Magnus
>
> On Sat, Oct 9, 2010 at 11:40, Marios Vodas <mvodas(at)gmail(dot)com> wrote:
> > I did a little search and I found that probably there is a library (dll
> or
> > lib ???) that contains all these references. I could specify it by using
> > -L/C/path/to/libraries -libraryname as an option to the second gcc
> command,
> > but I have no idea what the library is and where to find it (I used
> > -L/C/PostgreSQL/9.0/lib -lpostgres -lpq, but it didn't work).
> > All those references are declared as extern in postgres source code.
> > Does anyone know what the library is?
> >
> > On Fri, Oct 8, 2010 at 12:27 PM, Marios Vodas <mvodas(at)gmail(dot)com> wrote:
> >>
> >> I have a library that compiles fine under linux.
> >> But when I try to compile it under mingw on windows 7 I get the
> following
> >> errors.
> >>
> >>> gcc.exe -c -O2 -I/C/PostgreSQL/9.0/include/server
> >>> -I/C/PostgreSQL/9.0/include/server/utils
> >>> -I/C/PostgreSQL/9.0/include/server/access
> >>> -I/C/PostgreSQL/9.0/include/server/port/win32
> -I/C/PostgreSQL/9.0/include
> >>> -MMD -MP -MF build/Release/MinGW-Windows/mylib.o.d -o
> >>> build/Release/MinGW-Windows/mylib.o mylib.c
> >>
> >> The previous command is successful and produces .o files (only some
> >> warnings here like: warning: 'pg_finfo_mytype_in' redeclared without
> >> dllimport attribute: previous dllimport ignored).
> >> The following though gives errors.
> >>
> >>> gcc.exe -shared -o dist/Release/MinGW-Windows/libMyLib.dll
> >>> build/Release/MinGW-Windows/mylib.o
> >>
> >> Here is the log:
> >>
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x128): undefined
> >>> reference to `errstart'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x13d): undefined
> >>> reference to `_imp__CurrentMemoryContext'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x147): undefined
> >>> reference to `MemoryContextAlloc'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x17b): undefined
> >>> reference to `timestamp_in'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x180): undefined
> >>> reference to `DirectFunctionCall3'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x1be): undefined
> >>> reference to `timestamp_in'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x1c3): undefined
> >>> reference to `DirectFunctionCall3'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x1f4): undefined
> >>> reference to `errmsg'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x202): undefined
> >>> reference to `errcode'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x20e): undefined
> >>> reference to `errfinish'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x230): undefined
> >>> reference to `_imp__CurrentMemoryContext'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x23a): undefined
> >>> reference to `MemoryContextAlloc'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x251): undefined
> >>> reference to `Int64GetDatum'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x25c): undefined
> >>> reference to `timestamp_out'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x261): undefined
> >>> reference to `DirectFunctionCall1'
> >>> build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x284): undefined
> >>> reference to `Int64GetDatum'
> >>
> >
> >
>
>
>
> --
> Magnus Hagander
> Me: http://www.hagander.net/
> Work: http://www.redpill-linpro.com/
>