Re: compiling C library under mingw

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'
>>
>
>