1NAME	:=	rv
  2# Follow the kernel version
  3VERSION :=	$(shell cat VERSION 2> /dev/null || make -sC ../../.. kernelversion | grep -v make)
  4
  5# From libtracefs:
  6# Makefiles suck: This macro sets a default value of $(2) for the
  7# variable named by $(1), unless the variable has been set by
  8# environment or command line. This is necessary for CC and AR
  9# because make sets default values, so the simpler ?= approach
 10# won't work as expected.
 11define allow-override
 12  $(if $(or $(findstring environment,$(origin $(1))),\
 13            $(findstring command line,$(origin $(1)))),,\
 14    $(eval $(1) = $(2)))
 15endef
 16
 17# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
 18$(call allow-override,CC,$(CROSS_COMPILE)gcc)
 19$(call allow-override,AR,$(CROSS_COMPILE)ar)
 20$(call allow-override,STRIP,$(CROSS_COMPILE)strip)
 21$(call allow-override,PKG_CONFIG,pkg-config)
 22$(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
 23$(call allow-override,LDCONFIG,ldconfig)
 24
 25INSTALL	=	install
 26MKDIR	=	mkdir
 27FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
 28		-fasynchronous-unwind-tables -fstack-clash-protection
 29WOPTS	:= 	-Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -Wno-maybe-uninitialized
 30
 31ifeq ($(CC),clang)
 32  FOPTS := $(filter-out -ffat-lto-objects, $(FOPTS))
 33  WOPTS := $(filter-out -Wno-maybe-uninitialized, $(WOPTS))
 34endif
 35
 36TRACEFS_HEADERS	:= $$($(PKG_CONFIG) --cflags libtracefs)
 37
 38CFLAGS	:=	-O -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(TRACEFS_HEADERS) $(EXTRA_CFLAGS) -I include
 39LDFLAGS	:=	-flto=auto -ggdb $(EXTRA_LDFLAGS)
 40LIBS	:=	$$($(PKG_CONFIG) --libs libtracefs)
 41
 42SRC	:=	$(wildcard src/*.c)
 43HDR	:=	$(wildcard src/*.h)
 44OBJ	:=	$(SRC:.c=.o)
 45DIRS	:=	src
 46FILES	:=	Makefile README.txt
 47CEXT	:=	bz2
 48TARBALL	:=	$(NAME)-$(VERSION).tar.$(CEXT)
 49TAROPTS	:=	-cvjf $(TARBALL)
 50BINDIR	:=	/usr/bin
 51DATADIR	:=	/usr/share
 52DOCDIR	:=	$(DATADIR)/doc
 53MANDIR	:=	$(DATADIR)/man
 54LICDIR	:=	$(DATADIR)/licenses
 55SRCTREE	:=	$(or $(BUILD_SRC),$(CURDIR))
 56
 57# If running from the tarball, man pages are stored in the Documentation
 58# dir. If running from the kernel source, man pages are stored in
 59# Documentation/tools/rv/.
 60ifneq ($(wildcard Documentation/.*),)
 61DOCSRC	=	Documentation
 62else
 63DOCSRC	=	$(SRCTREE)/../../../Documentation/tools/rv/
 64endif
 65
 66LIBTRACEEVENT_MIN_VERSION = 1.5
 67LIBTRACEFS_MIN_VERSION = 1.3
 68
 69.PHONY:	all warnings show_warnings
 70all:	warnings rv
 71
 72TEST_LIBTRACEEVENT = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 || echo n")
 73ifeq ("$(TEST_LIBTRACEEVENT)", "n")
 74WARNINGS = show_warnings
 75MISSING_LIBS += echo "**   libtraceevent version $(LIBTRACEEVENT_MIN_VERSION) or higher";
 76MISSING_PACKAGES += "libtraceevent-devel"
 77MISSING_SOURCE += echo "**  https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ ";
 78endif
 79
 80TEST_LIBTRACEFS = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEFS_MIN_VERSION) libtracefs > /dev/null 2>&1 || echo n")
 81ifeq ("$(TEST_LIBTRACEFS)", "n")
 82WARNINGS = show_warnings
 83MISSING_LIBS += echo "**   libtracefs version $(LIBTRACEFS_MIN_VERSION) or higher";
 84MISSING_PACKAGES += "libtracefs-devel"
 85MISSING_SOURCE += echo "**  https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/ ";
 86endif
 87
 88define show_dependencies
 89	@echo "********************************************";				\
 90	echo "** NOTICE: Failed build dependencies";					\
 91	echo "**";									\
 92	echo "** Required Libraries:";							\
 93	$(MISSING_LIBS)									\
 94	echo "**";									\
 95	echo "** Consider installing the latest libtracefs from your";			\
 96	echo "** distribution, e.g., 'dnf install $(MISSING_PACKAGES)' on Fedora,";	\
 97	echo "** or from source:";							\
 98	echo "**";									\
 99	$(MISSING_SOURCE)								\
100	echo "**";									\
101	echo "********************************************"
102endef
103
104show_warnings:
105	$(call show_dependencies);
106
107ifneq ("$(WARNINGS)", "")
108ERROR_OUT = $(error Please add the necessary dependencies)
109
110warnings: $(WARNINGS)
111	$(ERROR_OUT)
112endif
113
114rv: $(OBJ)
115	$(CC) -o rv $(LDFLAGS) $(OBJ) $(LIBS)
116
117.PHONY: install
118install: doc_install
119	$(MKDIR) -p $(DESTDIR)$(BINDIR)
120	$(INSTALL) rv -m 755 $(DESTDIR)$(BINDIR)
121	$(STRIP) $(DESTDIR)$(BINDIR)/rv
122
123.PHONY: clean tarball
124clean: doc_clean
125	@test ! -f rv || rm rv
126	@test ! -f $(TARBALL) || rm -f $(TARBALL)
127	@rm -rf *~ $(OBJ) *.tar.$(CEXT)
128
129tarball: clean
130	rm -rf $(NAME)-$(VERSION) && mkdir $(NAME)-$(VERSION)
131	echo $(VERSION) > $(NAME)-$(VERSION)/VERSION
132	cp -r $(DIRS) $(FILES) $(NAME)-$(VERSION)
133	mkdir $(NAME)-$(VERSION)/Documentation/
134	cp -rp $(SRCTREE)/../../../Documentation/tools/rv/* $(NAME)-$(VERSION)/Documentation/
135	tar $(TAROPTS) --exclude='*~' $(NAME)-$(VERSION)
136	rm -rf $(NAME)-$(VERSION)
137
138.PHONY: doc doc_clean doc_install
139doc:
140	$(MAKE) -C $(DOCSRC)
141
142doc_clean:
143	$(MAKE) -C $(DOCSRC) clean
144
145doc_install:
146	$(MAKE) -C $(DOCSRC) install