Use tools/build/ makefiles to build rv, inheriting the benefits of
it. For example, having a proper way to handle dependencies.

Suggested-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Daniel Bristot de Oliveira <bris...@kernel.org>
---
 tools/verification/rv/.gitignore      |   2 +
 tools/verification/rv/Build           |   1 +
 tools/verification/rv/Makefile        | 166 +++++---------------------
 tools/verification/rv/Makefile.config |  44 +++++++
 tools/verification/rv/Makefile.rv     |  49 ++++++++
 tools/verification/rv/src/Build       |   4 +
 6 files changed, 133 insertions(+), 133 deletions(-)
 create mode 100644 tools/verification/rv/.gitignore
 create mode 100644 tools/verification/rv/Build
 create mode 100644 tools/verification/rv/Makefile.config
 create mode 100644 tools/verification/rv/Makefile.rv
 create mode 100644 tools/verification/rv/src/Build

diff --git a/tools/verification/rv/.gitignore b/tools/verification/rv/.gitignore
new file mode 100644
index 000000000000..a446aca35eb2
--- /dev/null
+++ b/tools/verification/rv/.gitignore
@@ -0,0 +1,2 @@
+rv
+FEATURE-DUMP
diff --git a/tools/verification/rv/Build b/tools/verification/rv/Build
new file mode 100644
index 000000000000..a44c22349d4b
--- /dev/null
+++ b/tools/verification/rv/Build
@@ -0,0 +1 @@
+rv-y += src/
diff --git a/tools/verification/rv/Makefile b/tools/verification/rv/Makefile
index 485f8aeddbe0..da16b7c4db0f 100644
--- a/tools/verification/rv/Makefile
+++ b/tools/verification/rv/Makefile
@@ -1,146 +1,46 @@
-NAME   :=      rv
-# Follow the kernel version
-VERSION :=     $(shell cat VERSION 2> /dev/null || make -sC ../../.. 
kernelversion | grep -v make)
+# SPDX-License-Identifier: GPL-2.0
+export srctree := $(abspath ../../..)
 
-# From libtracefs:
-# Makefiles suck: This macro sets a default value of $(2) for the
-# variable named by $(1), unless the variable has been set by
-# environment or command line. This is necessary for CC and AR
-# because make sets default values, so the simpler ?= approach
-# won't work as expected.
-define allow-override
-  $(if $(or $(findstring environment,$(origin $(1))),\
-            $(findstring command line,$(origin $(1)))),,\
-    $(eval $(1) = $(2)))
-endef
+VERSION                := $(shell sh -c "make -sC ../../.. kernelversion | 
grep -v make")
+DOCSRC         := ../../../Documentation/tools/rv/
 
-# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
-$(call allow-override,CC,$(CROSS_COMPILE)gcc)
-$(call allow-override,AR,$(CROSS_COMPILE)ar)
-$(call allow-override,STRIP,$(CROSS_COMPILE)strip)
-$(call allow-override,PKG_CONFIG,pkg-config)
-$(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
-$(call allow-override,LDCONFIG,ldconfig)
+FEATURE_TESTS  := libtraceevent
+FEATURE_TESTS  += libtracefs
+FEATURE_DISPLAY        := libtraceevent
+FEATURE_DISPLAY        += libtracefs
 
-INSTALL        =       install
-MKDIR  =       mkdir
-FOPTS  :=      -flto=auto -ffat-lto-objects -fexceptions 
-fstack-protector-strong \
-               -fasynchronous-unwind-tables -fstack-clash-protection
-WOPTS  :=      -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 
-Wp,-D_GLIBCXX_ASSERTIONS -Wno-maybe-uninitialized
-
-ifeq ($(CC),clang)
-  FOPTS := $(filter-out -ffat-lto-objects, $(FOPTS))
-  WOPTS := $(filter-out -Wno-maybe-uninitialized, $(WOPTS))
-endif
-
-TRACEFS_HEADERS        := $$($(PKG_CONFIG) --cflags libtracefs)
-
-CFLAGS :=      -O -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) 
$(TRACEFS_HEADERS) $(EXTRA_CFLAGS) -I include
-LDFLAGS        :=      -flto=auto -ggdb $(EXTRA_LDFLAGS)
-LIBS   :=      $$($(PKG_CONFIG) --libs libtracefs)
-
-SRC    :=      $(wildcard src/*.c)
-HDR    :=      $(wildcard src/*.h)
-OBJ    :=      $(SRC:.c=.o)
-DIRS   :=      src
-FILES  :=      Makefile README.txt
-CEXT   :=      bz2
-TARBALL        :=      $(NAME)-$(VERSION).tar.$(CEXT)
-TAROPTS        :=      -cvjf $(TARBALL)
-BINDIR :=      /usr/bin
-DATADIR        :=      /usr/share
-DOCDIR :=      $(DATADIR)/doc
-MANDIR :=      $(DATADIR)/man
-LICDIR :=      $(DATADIR)/licenses
-SRCTREE        :=      $(or $(BUILD_SRC),$(CURDIR))
-
-# If running from the tarball, man pages are stored in the Documentation
-# dir. If running from the kernel source, man pages are stored in
-# Documentation/tools/rv/.
-ifneq ($(wildcard Documentation/.*),)
-DOCSRC =       Documentation/
+ifeq ($(V),1)
+  Q =
 else
-DOCSRC =       $(SRCTREE)/../../../Documentation/tools/rv/
-endif
-
-LIBTRACEEVENT_MIN_VERSION = 1.5
-LIBTRACEFS_MIN_VERSION = 1.3
-
-.PHONY:        all warnings show_warnings
-all:   warnings rv
-
-TEST_LIBTRACEEVENT = $(shell sh -c "$(PKG_CONFIG) --atleast-version 
$(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 || echo n")
-ifeq ("$(TEST_LIBTRACEEVENT)", "n")
-WARNINGS = show_warnings
-MISSING_LIBS += echo "**   libtraceevent version $(LIBTRACEEVENT_MIN_VERSION) 
or higher";
-MISSING_PACKAGES += "libtraceevent-devel"
-MISSING_SOURCE += echo "**  
https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ ";
-endif
-
-TEST_LIBTRACEFS = $(shell sh -c "$(PKG_CONFIG) --atleast-version 
$(LIBTRACEFS_MIN_VERSION) libtracefs > /dev/null 2>&1 || echo n")
-ifeq ("$(TEST_LIBTRACEFS)", "n")
-WARNINGS = show_warnings
-MISSING_LIBS += echo "**   libtracefs version $(LIBTRACEFS_MIN_VERSION) or 
higher";
-MISSING_PACKAGES += "libtracefs-devel"
-MISSING_SOURCE += echo "**  
https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/ ";
+  Q = @
 endif
 
-define show_dependencies
-       @echo "********************************************";                   
        \
-       echo "** NOTICE: Failed build dependencies";                            
        \
-       echo "**";                                                              
        \
-       echo "** Required Libraries:";                                          
        \
-       $(MISSING_LIBS)                                                         
        \
-       echo "**";                                                              
        \
-       echo "** Consider installing the latest libtracefs from your";          
        \
-       echo "** distribution, e.g., 'dnf install $(MISSING_PACKAGES)' on 
Fedora,";     \
-       echo "** or from source:";                                              
        \
-       echo "**";                                                              
        \
-       $(MISSING_SOURCE)                                                       
        \
-       echo "**";                                                              
        \
-       echo "********************************************"
-endef
-
-show_warnings:
-       $(call show_dependencies);
-
-ifneq ("$(WARNINGS)", "")
-ERROR_OUT = $(error Please add the necessary dependencies)
-
-warnings: $(WARNINGS)
-       $(ERROR_OUT)
-endif
+rv:
 
-rv: $(OBJ)
-       $(CC) -o rv $(LDFLAGS) $(OBJ) $(LIBS)
+include $(srctree)/tools/build/Makefile.include
+include $(srctree)/tools/build/Makefile.feature
+include $(srctree)/tools/scripts/Makefile.include
+include Makefile.rv
+include Makefile.config
 
-.PHONY: install
-install: doc_install
-       $(MKDIR) -p $(DESTDIR)$(BINDIR)
-       $(INSTALL) rv -m 755 $(DESTDIR)$(BINDIR)
-       $(STRIP) $(DESTDIR)$(BINDIR)/rv
+CFLAGS         += $(INCLUDES) $(LIB_INCLUDES)
+export CFLAGS  := $(CFLAGS)
 
-.PHONY: clean tarball
-clean: doc_clean
-       @test ! -f rv || rm rv
-       @test ! -f $(TARBALL) || rm -f $(TARBALL)
-       @rm -rf *~ $(OBJ) *.tar.$(CEXT)
+rv: rv-in.o
+       $(QUIET_LINK)$(CC) $(LDFLAGS) -o $@ $^ $(EXTLIBS)
 
-tarball: clean
-       rm -rf $(NAME)-$(VERSION) && mkdir $(NAME)-$(VERSION)
-       echo $(VERSION) > $(NAME)-$(VERSION)/VERSION
-       cp -r $(DIRS) $(FILES) $(NAME)-$(VERSION)
-       mkdir $(NAME)-$(VERSION)/Documentation/
-       cp -rp $(SRCTREE)/../../../Documentation/tools/rv/* 
$(NAME)-$(VERSION)/Documentation/
-       tar $(TAROPTS) --exclude='*~' $(NAME)-$(VERSION)
-       rm -rf $(NAME)-$(VERSION)
+static: rv-in.o
+       $(eval LDFLAGS += -static)
+       $(QUIET_LINK)$(CC) $(LDFLAGS) -o rv-static $^ $(EXTLIBS)
 
-.PHONY: doc doc_clean doc_install
-doc:
-       $(MAKE) -C $(DOCSRC)
+rv.%: fixdep FORCE
+       make -f $(srctree)/tools/build/Makefile.build dir=. $@
 
-doc_clean:
-       $(MAKE) -C $(DOCSRC) clean
+rv-in.o: fixdep FORCE
+       make $(build)=rv
 
-doc_install:
-       $(MAKE) -C $(DOCSRC) install
+clean: doc_clean fixdep-clean
+       $(call QUIET_CLEAN, rv)
+       $(Q)find . -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name 
'\.*.d' -delete
+       $(Q)rm -f rv rv-static FEATURE-DUMP rv-*
+.PHONY: FORCE clean
diff --git a/tools/verification/rv/Makefile.config 
b/tools/verification/rv/Makefile.config
new file mode 100644
index 000000000000..5ab13af94bde
--- /dev/null
+++ b/tools/verification/rv/Makefile.config
@@ -0,0 +1,44 @@
+STOP_ERROR :=
+LIBTRACEEVENT_MIN_VERSION = 1.5
+LIBTRACEFS_MIN_VERSION = 1.3
+
+define lib_setup
+  $(eval LIB_INCLUDES += $(shell sh -c "$(PKG_CONFIG) --cflags lib$(1)"))
+  $(eval EXTLIBS += -l$(1))
+endef
+
+$(call feature_check,libtraceevent)
+ifeq ($(feature-libtraceevent), 1)
+  $(call detected,CONFIG_LIBTRACEEVENT)
+
+  TEST = $(shell sh -c "$(PKG_CONFIG) --atleast-version 
$(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 && echo y || echo 
n")
+  ifeq ($(TEST),n)
+    $(info libtraceevent version is too low, it must be at least 
$(LIBTRACEEVENT_MIN_VERSION))
+    STOP_ERROR := 1
+  endif
+
+  $(call lib_setup,traceevent)
+else
+  STOP_ERROR := 1
+  $(info libtraceevent is missing. Please install 
libtraceevent-dev/libtraceevent-devel)
+endif
+
+$(call feature_check,libtracefs)
+ifeq ($(feature-libtracefs), 1)
+  $(call detected,CONFIG_LIBTRACEFS)
+
+  TEST = $(shell sh -c "$(PKG_CONFIG) --atleast-version 
$(LIBTRACEFS_MIN_VERSION) libtracefs > /dev/null 2>&1 && echo y || echo n")
+  ifeq ($(TEST),n)
+    $(info libtracefs version is too low, it must be at least 
$(LIBTRACEFS_MIN_VERSION))
+    STOP_ERROR := 1
+  endif
+
+  $(call lib_setup,tracefs)
+else
+  STOP_ERROR := 1
+  $(info libtracefs is missing. Please install libtracefs-dev/libtracefs-devel)
+endif
+
+ifeq ($(STOP_ERROR),1)
+  $(error Please, check the errors above.)
+endif
diff --git a/tools/verification/rv/Makefile.rv 
b/tools/verification/rv/Makefile.rv
new file mode 100644
index 000000000000..805e4e8f5772
--- /dev/null
+++ b/tools/verification/rv/Makefile.rv
@@ -0,0 +1,49 @@
+define allow-override
+  $(if $(or $(findstring environment,$(origin $(1))),\
+            $(findstring command line,$(origin $(1)))),,\
+    $(eval $(1) = $(2)))
+endef
+
+# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+$(call allow-override,STRIP,$(CROSS_COMPILE)strip)
+$(call allow-override,PKG_CONFIG,pkg-config)
+$(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
+$(call allow-override,LDCONFIG,ldconfig)
+export CC AR STRIP PKG_CONFIG LD_SO_CONF_PATH LDCONFIG
+
+FOPTS  :=      -flto=auto -ffat-lto-objects -fexceptions 
-fstack-protector-strong      \
+               -fasynchronous-unwind-tables -fstack-clash-protection
+WOPTS  :=      -O -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2        
        \
+               -Wp,-D_GLIBCXX_ASSERTIONS -Wno-maybe-uninitialized
+
+ifeq ($(CC),clang)
+  FOPTS        :=      $(filter-out -flto=auto -ffat-lto-objects, $(FOPTS))
+  WOPTS        :=      $(filter-out -Wno-maybe-uninitialized, $(WOPTS))
+endif
+
+INCLUDE        :=      -Iinclude/
+CFLAGS :=      -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(WOPTS) $(EXTRA_CFLAGS) 
$(INCLUDE)
+LDFLAGS        :=      -ggdb $(EXTRA_LDFLAGS)
+
+INSTALL        =       install
+MKDIR  =       mkdir
+STRIP  =       strip
+BINDIR :=      /usr/bin
+
+.PHONY: install
+install: doc_install
+       @$(MKDIR) -p $(DESTDIR)$(BINDIR)
+       $(call QUIET_INSTALL,rv)$(INSTALL) rv -m 755 $(DESTDIR)$(BINDIR)
+       @$(STRIP) $(DESTDIR)$(BINDIR)/rv
+
+.PHONY: doc doc_clean doc_install
+doc:
+       $(MAKE) -C $(DOCSRC)
+
+doc_clean:
+       $(MAKE) -C $(DOCSRC) clean
+
+doc_install:
+       $(MAKE) -C $(DOCSRC) install
diff --git a/tools/verification/rv/src/Build b/tools/verification/rv/src/Build
new file mode 100644
index 000000000000..d781983c1a79
--- /dev/null
+++ b/tools/verification/rv/src/Build
@@ -0,0 +1,4 @@
+rv-y += trace.o
+rv-y += utils.o
+rv-y += in_kernel.o
+rv-y += rv.o
-- 
2.44.0


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