[PATCH net-next 2/2] tools: bpftool: create "uninstall", "doc-uninstall" make targets

[Jakub Kicinski <jakub.kicinski@netronome.com>]

From: Quentin Monnet <quentin.monnet@netronome.com>

Create two targets to remove executable and documentation that would
have been previously installed with `make install` and `make
doc-install`.

Also create a "QUIET_UNINST" helper in tools/scripts/Makefile.include.

Do not attempt to remove directories /usr/local/sbin and
/usr/share/bash-completions/completions, even if they are empty, as
those specific directories probably already existed on the system before
we installed the program, and we do not wish to break other makefiles
that might assume their existence. Do remvoe /usr/local/share/man/man8
if empty however, as this directory does not seem to exist by default.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
---
For addition to tools/scripts/Makefile.include:

CC: Arnaldo Carvalho de Melo <acme@redhat.com>
CC: Masahiro Yamada <yamada.masahiro@socionext.com>

 tools/bpf/bpftool/Documentation/Makefile |  8 +++++++-
 tools/bpf/bpftool/Makefile               | 12 ++++++++++--
 tools/scripts/Makefile.include           |  1 +
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/tools/bpf/bpftool/Documentation/Makefile b/tools/bpf/bpftool/Documentation/Makefile
index 71c17fab4f2f..c462a928e03d 100644
--- a/tools/bpf/bpftool/Documentation/Makefile
+++ b/tools/bpf/bpftool/Documentation/Makefile
@@ -3,6 +3,7 @@ include ../../../scripts/utilities.mak
 
 INSTALL ?= install
 RM ?= rm -f
+RMDIR ?= rmdir --ignore-fail-on-non-empty
 
 ifeq ($(V),1)
   Q =
@@ -34,5 +35,10 @@ install: man
 	$(Q)$(INSTALL) -d -m 755 $(DESTDIR)$(man8dir)
 	$(Q)$(INSTALL) -m 644 $(DOC_MAN8) $(DESTDIR)$(man8dir)
 
-.PHONY: man man8 clean install
+uninstall:
+	$(call QUIET_UNINST, Documentation-man)
+	$(Q)$(RM) $(addprefix $(DESTDIR)$(man8dir)/,$(_DOC_MAN8))
+	$(Q)$(RMDIR) $(DESTDIR)$(man8dir)
+
+.PHONY: man man8 clean install uninstall
 .DEFAULT_GOAL := man
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index 203ae2e14fbc..3f17ad317512 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -70,6 +70,11 @@ install: $(OUTPUT)bpftool
 	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
 	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
 
+uninstall:
+	$(call QUIET_UNINST, bpftool)
+	$(Q)$(RM) $(DESTDIR)$(prefix)/sbin/bpftool
+	$(Q)$(RM) $(DESTDIR)$(bash_compdir)/bpftool
+
 doc:
 	$(call descend,Documentation)
 
@@ -79,8 +84,11 @@ install: $(OUTPUT)bpftool
 doc-install:
 	$(call descend,Documentation,install)
 
+doc-uninstall:
+	$(call descend,Documentation,uninstall)
+
 FORCE:
 
-.PHONY: all FORCE clean install
-.PHONY: doc doc-clean doc-install
+.PHONY: all FORCE clean install uninstall
+.PHONY: doc doc-clean doc-install doc-uninstall
 .DEFAULT_GOAL := all
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index 3fab179b1aba..fcb3ed0be5f8 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -99,5 +99,6 @@ ifneq ($(silent),1)
 
 	QUIET_CLEAN    = @printf '  CLEAN    %s\n' $1;
 	QUIET_INSTALL  = @printf '  INSTALL  %s\n' $1;
+	QUIET_UNINST   = @printf '  UNINST   %s\n' $1;
   endif
 endif
-- 
2.15.1