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tools: bpf: build and install man page for eBPF helpers from bpftool/ 

Provide a new Makefile.helpers in tools/bpf, in order to build and
install the man page for eBPF helpers. This Makefile is also included in
the one used to build bpftool documentation, so that it can be called
either on its own (cd tools/bpf && make -f Makefile.helpers) or from
bpftool directory (cd tools/bpf/bpftool && make doc, or
cd tools/bpf/bpftool/Documentation && make helpers).

Makefile.helpers is not added directly to bpftool to avoid changing its
Makefile too much (helpers are not 100% directly related with bpftool).
But the possibility to build the page from bpftool directory makes us
able to package the helpers man page with bpftool, and to install it
along with bpftool documentation, so that the doc for helpers becomes
easily available to developers through the "man" program.

Cc: linux-man@vger.kernel.org
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Quentin Monnet 2018-07-12 12:52:24 +01:00 committed by Daniel Borkmann
parent 9b8ca37951
commit 86f7d85cec
2 changed files with 67 additions and 5 deletions
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59
tools/bpf/Makefile.helpers Normal file
View File

@ -0,0 +1,59 @@
ifndef allow-override
include ../scripts/Makefile.include
include ../scripts/utilities.mak
else
# Assume Makefile.helpers is being run from bpftool/Documentation
# subdirectory. Go up two more directories to fetch bpf.h header and
# associated script.
UP2DIR := ../../
endif
INSTALL ?= install
RM ?= rm -f
RMDIR ?= rmdir --ignore-fail-on-non-empty
ifeq ($(V),1)
Q =
else
Q = @
endif
prefix ?= /usr/local
mandir ?= $(prefix)/man
man7dir = $(mandir)/man7
HELPERS_RST = bpf-helpers.rst
MAN7_RST = $(HELPERS_RST)
_DOC_MAN7 = $(patsubst %.rst,%.7,$(MAN7_RST))
DOC_MAN7 = $(addprefix $(OUTPUT),$(_DOC_MAN7))
helpers: man7
man7: $(DOC_MAN7)
RST2MAN_DEP := $(shell command -v rst2man 2>/dev/null)
$(OUTPUT)$(HELPERS_RST): $(UP2DIR)../../include/uapi/linux/bpf.h
$(QUIET_GEN)$(UP2DIR)../../scripts/bpf_helpers_doc.py --filename $< > $@
$(OUTPUT)%.7: $(OUTPUT)%.rst
ifndef RST2MAN_DEP
$(error "rst2man not found, but required to generate man pages")
endif
$(QUIET_GEN)rst2man $< > $@
helpers-clean:
$(call QUIET_CLEAN, eBPF_helpers-manpage)
$(Q)$(RM) $(DOC_MAN7) $(OUTPUT)$(HELPERS_RST)
helpers-install: helpers
$(call QUIET_INSTALL, eBPF_helpers-manpage)
$(Q)$(INSTALL) -d -m 755 $(DESTDIR)$(man7dir)
$(Q)$(INSTALL) -m 644 $(DOC_MAN7) $(DESTDIR)$(man7dir)
helpers-uninstall:
$(call QUIET_UNINST, eBPF_helpers-manpage)
$(Q)$(RM) $(addprefix $(DESTDIR)$(man7dir)/,$(_DOC_MAN7))
$(Q)$(RMDIR) $(DESTDIR)$(man7dir)
.PHONY: helpers helpers-clean helpers-install helpers-uninstall

13
tools/bpf/bpftool/Documentation/Makefile
View File

@ -15,12 +15,15 @@ prefix ?= /usr/local
mandir ?= $(prefix)/man
man8dir = $(mandir)/man8
MAN8_RST = $(wildcard *.rst)
# Load targets for building eBPF helpers man page.
include ../../Makefile.helpers
MAN8_RST = $(filter-out $(HELPERS_RST),$(wildcard *.rst))
_DOC_MAN8 = $(patsubst %.rst,%.8,$(MAN8_RST))
DOC_MAN8 = $(addprefix $(OUTPUT),$(_DOC_MAN8))
man: man8
man: man8 helpers
man8: $(DOC_MAN8)
RST2MAN_DEP := $(shell command -v rst2man 2>/dev/null)
@ -31,16 +34,16 @@ ifndef RST2MAN_DEP
endif
$(QUIET_GEN)rst2man $< > $@
clean:
clean: helpers-clean
$(call QUIET_CLEAN, Documentation)
$(Q)$(RM) $(DOC_MAN8)
install: man
install: man helpers-install
$(call QUIET_INSTALL, Documentation-man)
$(Q)$(INSTALL) -d -m 755 $(DESTDIR)$(man8dir)
$(Q)$(INSTALL) -m 644 $(DOC_MAN8) $(DESTDIR)$(man8dir)
uninstall:
uninstall: helpers-uninstall
$(call QUIET_UNINST, Documentation-man)
$(Q)$(RM) $(addprefix $(DESTDIR)$(man8dir)/,$(_DOC_MAN8))
$(Q)$(RMDIR) $(DESTDIR)$(man8dir)