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[1/3] libtraceevent: Add a way to uninstall

Message ID 20201216043716.818873731@goodmis.org (mailing list archive)
State Accepted
Commit 642a66d420adbda521344f1757bd6df920c713a3
Headers show
Series libtraceevent: Add uninstall and fix build dependency of libtraceevent.pc | expand

Commit Message

Steven Rostedt Dec. 16, 2020, 4:36 a.m. UTC 
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Add an uninstall target. The way this works is to create a temp directory,
build and install into it. The examine the files in that directory, to know
what files need to be removed. The DESTDIR and prefix need to be the same as
how the install happened.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 Makefile                 | 26 ++++++++++++++++++++++++++
 scripts/Makefile.include |  1 +
 2 files changed, 27 insertions(+)
diff mbox series

Patch

diff --git a/Makefile b/Makefile
index 12ae490276f4..c85114beef96 100644
--- a/Makefile
+++ b/Makefile
@@ -292,6 +292,32 @@  clean: clean_plugins clean_src
 		$(RM) $(OUTPUT)*.o $(OUTPUT)*~ $(TARGETS) $(OUTPUT)*.a $(OUTPUT)*.so $(VERSION_FILES) $(OUTPUT).*.d $(OUTPUT).*.cmd; \
 		$(RM) TRACEEVENT-CFLAGS $(OUTPUT)tags $(OUTPUT)TAGS; \
 		$(RM) $(PKG_CONFIG_FILE)
+ifneq ($(OUTPUT),)
+else
+BUILD_OUTPUT := $(shell pwd)
+endif
+
+define build_uninstall_script
+	$(Q)mkdir $(BUILD_OUTPUT)/tmp_build
+	$(Q)$(MAKE) -C $(srctree) DESTDIR=$(BUILD_OUTPUT)/tmp_build/ O=$(BUILD_OUTPUT) $1 > /dev/null
+	$(Q)find $(BUILD_OUTPUT)/tmp_build ! -type d -printf "%P\n" > $(BUILD_OUTPUT)/build_$2
+	$(Q)$(RM) -rf $(BUILD_OUTPUT)/tmp_build
+endef
+
+build_uninstall:
+	$(call build_uninstall_script,install,uninstall)
+
+$(BUILD_OUTPUT)/build_uninstall: build_uninstall
+
+define uninstall_file
+	if [ -f $(DESTDIR)/$1 -o -h $(DESTDIR)/$1 ]; then \
+		$(call PRINT_UNINST,$(DESTDIR)$1)$(RM) $(DESTDIR)/$1; \
+	fi;
+endef
+
+uninstall: $(BUILD_OUTPUT)/build_uninstall
+	@$(foreach file,$(shell cat $(BUILD_OUTPUT)/build_uninstall),$(call uninstall_file,$(file)))
+	$(Q)$(RM) $<
 
 PHONY += doc
 doc:
diff --git a/scripts/Makefile.include b/scripts/Makefile.include
index 5257bd6637a9..d505b2f20b92 100644
--- a/scripts/Makefile.include
+++ b/scripts/Makefile.include
@@ -124,6 +124,7 @@  ifneq ($(silent),1)
 		$(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
 
 	PRINT_INSTALL  = printf '  INSTALL  %s\n' $1;
+	PRINT_UNINST   = printf '  UNINST   %s\n' $1;
 	QUIET_CLEAN    = @printf '  CLEAN    %s\n' $1;
 	QUIET_INSTALL  = @printf '  INSTALL  %s\n' $1;
 	QUIET_UNINST   = @printf '  UNINST   %s\n' $1;