For Delphi 5-7, C++Builder 6:
menu "Tools | Environment Options", tab "Library", "Library Path"
For Turbo, BDS 2006 and RAD Studio 2007-2010 and XE:
menu "Tools | Options",
page "Environment Options | Delphi Options | Library - Win32", "Library Path",
page "Environment Options | C++ Options | Path and Directories", "Include Path" and "Search Path".
Additionally, for RAD Studio C++Builder, path to OBJ files must be added in "Search Path"
(OBJ files are usually placed in "Debug" or "Release" subdirectory).
For RAD Studio XE2-XE4:
menu "Tools | Options",
page "Environment Options | Delphi Options | Library", "Library Path" (both for "32-bit Windows" and "64-bit Windows" platforms),
page "Environment Options | C++ Options | Path and Directories", "Include Path" and "Search Path".