***BOGO*** [Mingw-users] Trying to port a C Linux library to windows

["Mariano Martinez Peck" <marianopeck@xxxxxxxxx>]

Hi everybody! 
 
I am really newbie and this is the first time I use MinGW. I need help.
I am trying to compile OpenDBX version 1.3.10 with MinGW and I have
some problems. OpenDBX is an API written in C that enables you to talk
to several relational database engines. His author, Norbert, tell me
that with this release (1.3.10) OpenDBX could be compiled for Windows
using Cygwin or MinGW. 
 
The thing is that I am doing a plugin for Squeak Smalltalk and because
of this I need the native dll compiled. I mean, I need to have the
openDBX dlls as any other windows dll. Because of this, I undersand I
cannot use cygwin but MinGW. 
 
If I compile OpenDBX with cygwin I don't have problem at all. I compile and works perfectly. The problem I have is with MinGW. 
 
I have installed MinGW (c:/MinGW), MSYS (c:/msys) and msysDTK. In PATH
variable I have: ....c:\msys\1.0\bin\;c:\cygwin\bin\ (yes, I have also
cygwin installed). The openDBX directory is in:
c:\mariano\opendbx-1.3.10\  
They all seem to work well.  
 
I have already installed MySQL (c:/MySQL/) and PostgreSQL (c:/PostgreSQl) 
 
When I compile openDBX in linux I do: 
 
CPPFLAGS="-I/usr/include/postgresql" LDFLAGS="-L/usr/lib/postgresql" ./configure --with-backends="pgsql" 
 
The --with-backends="pgsql" is just to tell openDBX which engines to
compile. And then, with LDFLAGS and CPPFLAGS I have to tell it where
the libs and the include are.  
 
Then I do a make and finally a make install. 
 
With MSYS I try to do: 
 
CPPFLAGS=-I"c:/PostgreSQL/8.3/include/" LDFLAGS=-L"c:/PostgreSQL/8.3/lib/" ./configure --with-backends="pgsql" 
 
CPPFLAGS="-Ic:/PostgreSQL/8.3/include/" LDFLAGS="-Lc:/PostgreSQL/8.3/lib/" ./configure --with-backends="pgsql" 
 
CPPFLAGS="-I/c/PostgreSQL/8.3/include/" LDFLAGS="-L/c/PostgreSQL/8.3/lib/" ./configure --with-backends="pgsql" 
 
CPPFLAGS=-I"/c/PostgreSQL/8.3/include/" LDFLAGS=-L"/c/PostgreSQL/8.3/lib/" ./configure --with-backends="pgsql" 
 
CPPFLAGS=-I"\c\PostgreSQL\8.3\include\" LDFLAGS=-L"\c\PostgreSQL\8.3\lib\" ./configure --with-backends="pgsql" 
 
export CPPFLAGS=-I"/c/PostgreSQL/8.3/include/" 
export LDFLAGS=-L"/c/PostgreSQL/8.3/lib/" 
./configure --with-backends="pgsql" 
 
 
But, in all cases, in the console I see this error: 
 
checking libpq-fe.h usability... yes 
checking libpq-fe.h presence... yes 
checking for libpq-fe.h... yes 
checking limits.h usability... yes 
checking limits.h presence... yes 
checking for limits.h... yes 
checking for PQconnectdb in -lpq... no 
configure: error: postgresql library (libpq) not found 
 
And in config.log I can see: 
 
 
configure:28655: checking for PQconnectdb in -lpq 
configure:28690: gcc -std=gnu99 -o 
conftest.exe -g -O2 -I/c/PostgreSQL/8.3/include -L/c/PostgreSQL/8.3/lib 
conftest.c -lpq   >&5 
c:\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: cannot 
find -lpq 
collect2: ld returned 1 exit status 
 
I don't know exactly how the PostgreSQL library must be named, but "ld" 
doesn't find what it's looking for. 
 
The strange thing is that if I look in c:\PostgreSQL\8.3\lib\ I do have libpq.lib 
Moreover it do find .h files 
In addition, I could compile openDBX with postgres with cygwin without a problem. 
 
At first I thought that perhaps there was a problem with Postgres and I
tried with MySQL, but I have the same problem (It doesn't find mysql
libs). 
 
So, can anyone help me? I really need to fix this problem. 
 
Very thanks in advance, 
 
Mariano 
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