Matching the Makefile is a good approach if you don't find the place in Makefile.PL where the libraries and command line switches are added.

From your description it seems as if you only added -DSYS_LP64 but omitted -llibsybtcl64. Most likely, you will also need to remove -lsybctl .

My guess is that you will need to change all mentions of -lsyb* to -lsyb*64 so the build process picks up the 64-bit versions of the libraries.

In reply to Re^3: DBD::Sybase make fails because of incompatible shared object(.so) by Corion
in thread DBD::Sybase - 'make' fails because of incompatible shared object(.so) by fire_blade

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