libpq 32 and 64
lazarus / 16-Databases

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fpcoder · 2015-01-01 22:08

Here's what I have on this computer, and it works fine: Postgres 64 -
Lazarus 64 trunk - Windows 7 64

Problem is, also Lazarus 32 is now installed and when a 32 bit app
starts, there is an error:

Code: [Select]Can not load PostgreSQL client library "libpq.dll".
Check your installation.
So a 32 bit libpq.dll is needed? But how? Postgres 64 is already
installed and in the path. Anyway I downloaded
"postgresql-9.3.5-1-windows-binaries.zip" and followed the
instructions:

"Normally you do not need to install any of the client files. You
should place the libpq.dll file in the same directory as your
applications .EXE-file."

Still the same error message. :-I

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howardpc · 2015-01-01 22:39

Do the 32-bit and 64-bit .dlls have the same name? Windows has
thunking magic to distinguish them, but perhaps Lazarus does no check
of the bitness for which they were compiled, relying just on the name?

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fpcoder · 2015-01-01 23:42

Yes, the DLL's have the same name both for 32 and 64 bit. I installed
the 32bit version of pgAdmin, which contains all needed DLL's, and put
the pgAdmin dir in the path. It worked! Even though the names of the
DLL's are the same, the right ones are used. Now I can switch freely
between Lazarus 64 and 32 without thinking of these files. Thanks for
the advice Howard!