Erlang_odbc with nix on Mac OS fails the link check to unixODBC

Erlang & BEAM Forum (archived) Questions / Help (archived)
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I already filed an issue to the nix repository here: erlang_odbc not building correctly on OSX/darwin · Issue #94644 · NixOS/nixpkgs · GitHub

But, as you can see in my last comment there, I think that this issue might be caused by a setting in the configure phase of the build. Somehow the build script assumes that I want to build with the flag -liodbc instead of -lodbc - which is bogus.

That’s why I reach out here: can someone explain, why idobc is used even though I specifically pass the path to unixODBC to the build via --with-odbc=/nix/store/2z0cwqcwk21ai7mspflgx0ry4c7jr92k-unixODBC-2.3.7?

Specifically I don’t fully understand this line in the configure script: otp/lib/odbc/configure.in at OTP-22.3.1 · erlang/otp · GitHub

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It seems like I’ve found the solution: In AC_CHECK_LIB(iodbc, SQLAllocHandle,[ODBC_LIB="$ODBC_LIB -lodbc"; odbc_lib_link_success=yes]) the iodbc should be odbc. Then the build completes without the warning :man_shrugging: