--- /dev/null
+# build and runtime dependencies
+
+* systemd libraries
+ * Mandatory on Linux systems that use systemd (version 254 or newer).
+ Needed for the multi-user programs ('who', 'users', 'pinky', and
+ - if built - 'uptime'), so that they can access the database of
+ user logins from systemd-logind.
+ Related 'configure' option: --enable-systemd.
+ * Homepage:
+ https://systemd.io/
+ + Download:
+ https://github.com/systemd/systemd
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libsystemd-dev,
+ - On Red Hat distributions: systemd-devel.
+ - Other: https://repology.org/project/systemd/versions
+
+* libselinux
+ + Mandatory on Linux systems that support SELinux.
+ Needed so that the file utilities respect the security contexts,
+ and for the 'runcon' and 'chcon' programs.
+ + Homepage:
+ https://github.com/SELinuxProject
+ + Download:
+ https://github.com/SELinuxProject/selinux
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libselinux1-dev,
+ - On Red Hat distributions: libselinux-devel.
+ - Other: https://repology.org/project/libselinux/versions
+
+* libacl
+ + Recommended on Linux systems.
+ Needed so that the file utilities respect the access control lists (ACLs)
+ set on the original files.
+ + Homepage:
+ https://savannah.nongnu.org/projects/acl/
+ + Download:
+ https://download.savannah.nongnu.org/releases/acl/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libacl1-dev,
+ - On Red Hat distributions: libacl-devel.
+ - Other: https://repology.org/project/acl/versions
+
+* libattr
+ + Recommended on Linux systems.
+ Needed so that the file utilities respect the access control lists (ACLs)
+ set on the original files, with fewer system calls.
+ + Homepage:
+ https://savannah.nongnu.org/projects/attr/
+ + Download:
+ https://download.savannah.nongnu.org/releases/attr/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libattr1-dev,
+ - On Red Hat distributions: libattr-devel.
+ - Other: https://repology.org/project/attr/versions
+
+* libcap
+ + Recommended on Linux systems.
+ Needed so that 'ls' can display capabilities.
+ + Homepage:
+ https://sites.google.com/site/fullycapable/
+ + Download:
+ https://git.kernel.org/pub/scm/libs/libcap/libcap.git/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libcap-dev,
+ - On Red Hat distributions: libcap-devel.
+ - Other: https://repology.org/project/libcap/versions
+
+* GNU libiconv
+ + Not needed on systems with glibc and on NetBSD.
+ But highly recommended on all other systems.
+ Needed for character set conversion from/to Unicode.
+ + Homepage:
+ https://www.gnu.org/software/libiconv/
+ + Download:
+ https://ftp.gnu.org/gnu/libiconv/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: --,
+ - On Red Hat distributions: --.
+ - Other: https://repology.org/project/libiconv/versions
+ + If it is installed in a nonstandard directory, pass the option
+ --with-libiconv-prefix=DIR to 'configure'.
+ + On mingw, a slim alternative is the 'win-iconv' package version 0.0.8
+ from https://github.com/win-iconv/win-iconv .
+
+* libintl, part of GNU gettext
+ + Not needed on systems with glibc.
+ But highly recommended on all other systems.
+ Needed for localization (translation) of messages to the user's
+ native language.
+ + Homepage:
+ https://www.gnu.org/software/gettext/
+ + Download:
+ https://ftp.gnu.org/gnu/gettext/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: --,
+ - On Red Hat distributions: --.
+ - Other: https://repology.org/project/gettext/versions
+ + If it is installed in a nonstandard directory, pass the option
+ --with-libintl-prefix=DIR to 'configure'.
+
+* OpenSSL.
+ + Optional.
+ Needed for optimized crypto hash sums.
+ Related 'configure' option: --with-openssl.
+ + Homepage:
+ https://www.openssl.org/
+ + Download:
+ https://www.openssl.org/source/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libssl-dev,
+ - On Red Hat distributions: openssl-devel.
+ - Other: https://repology.org/project/openssl/versions
+
+* GNU gmp.
+ + Optional.
+ Needed for optimized multiprecision computations in the programs
+ 'expr', 'basenc', 'factor'.
+ + Homepage:
+ https://www.gnu.org/software/gmp/
+ + Download:
+ https://ftp.gnu.org/gnu/gmp/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: libgmp-dev,
+ - On Red Hat distributions: gmp-devel.
+ - Other: https://repology.org/project/gmp/versions
+ + If it is installed in a nonstandard directory, pass the option
+ --with-libgmp-prefix to 'configure'.
+
+* libsmack
+ + Optional on Linux systems.
+ Needed for supporting the "Simplified Mandatory Access Control Kernel"
+ Linux security module.
+ + Homepage:
+ https://schaufler-ca.com/
+ + Download:
+ https://github.com/smack-team/smack
+ + Pre-built package name:
+ - On Debian and Debian-based systems: --,
+ - On Red Hat distributions: --.
+ - Other: https://repology.org/project/smack-utils/versions
+
+
+# runtime only dependencies
+
+None.
+
+
+# build only dependencies
+
+* A C runtime, compiler, linker, etc.
+ + Mandatory.
+ Either the platform's native 'cc', or GCC 4.4 or newer.
+ + GCC Homepage:
+ https://gcc.gnu.org/
+ + Download:
+ https://ftp.gnu.org/gnu/gcc/
+ + Pre-built package name:
+ - On Debian and Debian-based systems: gcc,
+ - On Red Hat distributions: gcc,
+ - On Alpine Linux: gcc, linux-headers.
+ - Other: https://repology.org/project/gcc/versions
+
+* A 'make' utility.
+ + Mandatory.
+ Either the platform's native 'make' (on *BSD systems, and for in-tree
+ builds only), or GNU Make 4.0 or newer.
+ + GNU Make Homepage:
+ https://www.gnu.org/software/make/
+ + Download:
+ https://ftp.gnu.org/gnu/make/
+
+* A shell
+ + Mandatory.
+ Either the platform's native 'sh', or Bash.
+ + Homepage:
+ https://www.gnu.org/software/bash/
+ + Download:
+ https://ftp.gnu.org/gnu/bash/
+
+* Core POSIX utilities, including:
+ [ basename cat chgrp chmod chown cp dd echo expand expr
+ false hostname install kill ln ls md5sum mkdir mkfifo
+ mknod mv printenv pwd rm rmdir sleep sort tee test touch
+ true uname
+ + Mandatory.
+ Either the platform's native utilities, or GNU coreutils.
+ + Homepage:
+ https://www.gnu.org/software/coreutils/
+ + Download:
+ https://ftp.gnu.org/gnu/coreutils/
+
+* The comparison utilities 'cmp' and 'diff'.
+ + Mandatory.
+ Either the platform's native utilities, or GNU diffutils.
+ + Homepage:
+ https://www.gnu.org/software/diffutils/
+ + Download:
+ https://ftp.gnu.org/gnu/diffutils/
+
+* Grep.
+ + Mandatory.
+ Either the platform's native grep, or GNU grep.
+ + Homepage:
+ https://www.gnu.org/software/grep/
+ + Download:
+ https://ftp.gnu.org/gnu/grep/
+
+* Awk.
+ + Mandatory.
+ Either the platform's native awk, mawk, or nawk, or GNU awk.
+ + Homepage:
+ https://www.gnu.org/software/gawk/
+ + Download:
+ https://ftp.gnu.org/gnu/gawk/