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

[JonY <10walls@xxxxxxxxx>]

Mariano Martinez Peck wrote:
> 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
>
>

Try renaming it to "libpq.a".

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