Makefile: FHS conformant manpage installation pathes
FHS mandates manpages should go to /usr/share/man (or /usr/local/share/man, for site local installations) -- /usr/man was an fallout of some ancient Unices that haven't been fully FHS conformant and usually just a symlink to /usr/share/man, if existing at all. Distros sometimes need to override this (eg. MVCC installs), therefore go the 30+ years common practise way and introduce MANDIR environment variable. Since it's a subdir under the prefix for general constant and machine architecture independ data -- which in turn also sometimes wants to be overridden by distros, it shall be derived from DATADIR variable. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
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							@@ -24,6 +24,8 @@ ROOTDIR=$(dir $(abspath $(lastword $(MAKEFILE_LIST))))
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# The files will be installed under `$(DESTDIR)/$(PREFIX)`.
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					# The files will be installed under `$(DESTDIR)/$(PREFIX)`.
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# The convention of `DESTDIR` was changed in containerd v1.6.
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					# The convention of `DESTDIR` was changed in containerd v1.6.
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PREFIX        ?= /usr/local
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					PREFIX        ?= /usr/local
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					DATADIR       ?= $(PREFIX)/share
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					MANDIR        ?= $(DATADIR)/man
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TEST_IMAGE_LIST ?=
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					TEST_IMAGE_LIST ?=
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@@ -253,8 +255,8 @@ man/%: docs/man/%.md FORCE
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	go-md2man -in "$<" -out "$@"
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						go-md2man -in "$<" -out "$@"
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define installmanpage
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					define installmanpage
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$(INSTALL) -d $(DESTDIR)/$(PREFIX)/man/man$(2);
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					$(INSTALL) -d $(DESTDIR)/$(MANDIR)/man$(2);
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gzip -c $(1) >$(DESTDIR)/$(PREFIX)/man/man$(2)/$(3).gz;
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					gzip -c $(1) >$(DESTDIR)/$(MANDIR)/man$(2)/$(3).gz;
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endef
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					endef
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install-man: man
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					install-man: man
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