Package licenses: All packages contain a license field that specifies the license(s) source that apply to the package using the commonly used licenses in /usr/share/licenses/common. It means, if a source is under a license which is available in /usr/share/licenses/common (eg.
GPL-2), simply it should be referenced in the package license field (eg. license=('
GPL-2')). If it is not the case, then it should be included in the package itself and set license=('custom:LicenseName'). The license file should be placed in /usr/share/licenses/$pkgname when building the package. If multiple licenses are applicable, the conditions are: