Fixes for the RTLA tooling:

- Fix tracer name in comments and prints
 
 - Fix setting up symlinks
 
 - Allow extra flags to be set in build
 
 - Consolidate and show all necessary libraries not found in build error
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Merge tag 'trace-rtla-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull rtla tool fixes from Steven Rostedt:
 "Fixes for the Real-Time Linux Analysis tooling:

   - Fix tracer name in comments and prints

   - Fix setting up symlinks

   - Allow extra flags to be set in build

   - Consolidate and show all necessary libraries not found in build
     error"

* tag 'trace-rtla-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  rtla: Consolidate and show all necessary libraries that failed for building
  tools/rtla: Build with EXTRA_{C,LD}FLAGS
  tools/rtla: Fix command symlinks
  rtla: Fix tracer name

Documentation/tools/rtla/rtla-timerlat-hist.rst

@@ -33,7 +33,7 @@ EXAMPLE
 =======
 In the example below, **rtla timerlat hist** is set to run for *10* minutes,
 in the cpus *0-4*, *skipping zero* only lines. Moreover, **rtla timerlat
-hist** will change the priority of the *timelat* threads to run under
+hist** will change the priority of the *timerlat* threads to run under
 *SCHED_DEADLINE* priority, with a *10us* runtime every *1ms* period. The
 *1ms* period is also passed to the *timerlat* tracer::
 

tools/tracing/rtla/Makefile

@@ -30,8 +30,8 @@ WOPTS	:= 	-Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_A
 
 TRACEFS_HEADERS	:= $$($(PKG_CONFIG) --cflags libtracefs)
 
-CFLAGS	:=	-O -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(TRACEFS_HEADERS)
-LDFLAGS	:=	-ggdb
+CFLAGS	:=	-O -g -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(TRACEFS_HEADERS) $(EXTRA_CFLAGS)
+LDFLAGS	:=	-ggdb $(EXTRA_LDFLAGS)
 LIBS	:=	$$($(PKG_CONFIG) --libs libtracefs)
 
 SRC	:=	$(wildcard src/*.c)
@@ -61,40 +61,50 @@ endif
 LIBTRACEEVENT_MIN_VERSION = 1.5
 LIBTRACEFS_MIN_VERSION = 1.3
 
+.PHONY:	all warnings show_warnings
+all:	warnings rtla
+
 TEST_LIBTRACEEVENT = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 || echo n")
 ifeq ("$(TEST_LIBTRACEEVENT)", "n")
-.PHONY: warning_traceevent
-warning_traceevent:
-	@echo "********************************************"
-	@echo "** NOTICE: libtraceevent version $(LIBTRACEEVENT_MIN_VERSION) or higher not found"
-	@echo "**"
-	@echo "** Consider installing the latest libtraceevent from your"
-	@echo "** distribution, e.g., 'dnf install libtraceevent' on Fedora,"
-	@echo "** or from source:"
-	@echo "**"
-	@echo "**  https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ "
-	@echo "**"
-	@echo "********************************************"
+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")
-.PHONY: warning_tracefs
-warning_tracefs:
-	@echo "********************************************"
-	@echo "** NOTICE: libtracefs version $(LIBTRACEFS_MIN_VERSION) or higher not found"
-	@echo "**"
-	@echo "** Consider installing the latest libtracefs from your"
-	@echo "** distribution, e.g., 'dnf install libtracefs' on Fedora,"
-	@echo "** or from source:"
-	@echo "**"
-	@echo "**  https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/ "
-	@echo "**"
-	@echo "********************************************"
+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/ ";
 endif
 
-.PHONY:	all
-all:	rtla
+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
 
 rtla: $(OBJ)
 	$(CC) -o rtla $(LDFLAGS) $(OBJ) $(LIBS)
@@ -108,9 +118,9 @@ install: doc_install
 	$(INSTALL) rtla -m 755 $(DESTDIR)$(BINDIR)
 	$(STRIP) $(DESTDIR)$(BINDIR)/rtla
 	@test ! -f $(DESTDIR)$(BINDIR)/osnoise || rm $(DESTDIR)$(BINDIR)/osnoise
-	ln -s $(DESTDIR)$(BINDIR)/rtla $(DESTDIR)$(BINDIR)/osnoise
+	ln -s rtla $(DESTDIR)$(BINDIR)/osnoise
 	@test ! -f $(DESTDIR)$(BINDIR)/timerlat || rm $(DESTDIR)$(BINDIR)/timerlat
-	ln -s $(DESTDIR)$(BINDIR)/rtla $(DESTDIR)$(BINDIR)/timerlat
+	ln -s rtla $(DESTDIR)$(BINDIR)/timerlat
 
 .PHONY: clean tarball
 clean: doc_clean

tools/tracing/rtla/src/timerlat_hist.c

@@ -892,7 +892,7 @@ int timerlat_hist_main(int argc, char *argv[])
 	return_value = 0;
 
 	if (trace_is_off(&tool->trace, &record->trace)) {
-		printf("rtla timelat hit stop tracing\n");
+		printf("rtla timerlat hit stop tracing\n");
 		if (params->trace_output) {
 			printf("  Saving trace to %s\n", params->trace_output);
 			save_trace_to_file(record->trace.inst, params->trace_output);

tools/tracing/rtla/src/timerlat_top.c

@@ -687,7 +687,7 @@ int timerlat_top_main(int argc, char *argv[])
 	return_value = 0;
 
 	if (trace_is_off(&top->trace, &record->trace)) {
-		printf("rtla timelat hit stop tracing\n");
+		printf("rtla timerlat hit stop tracing\n");
 		if (params->trace_output) {
 			printf("  Saving trace to %s\n", params->trace_output);
 			save_trace_to_file(record->trace.inst, params->trace_output);