Fix: Don't override user variables within the build system

[lttng-ust.git] / doc / examples / demo / Makefile

diff --git a/doc/examples/demo/Makefile b/doc/examples/demo/Makefile
index 7e9746fa181c3a9d9585f8cae38b8f077b9b59f9..6272a2ba1081e1e1644c82c9a120952bfc199e29 100644 (file)
--- a/doc/examples/demo/Makefile
+++ b/doc/examples/demo/Makefile
@@ -8,54 +8,45 @@
 # Permission to modify the code and to distribute modified code is
 # granted, provided the above notices are retained, and a notice that
 # the code was modified is included with the above copyright notice.
-
+#
 # This Makefile is not using automake so that users may see how to build
 # a program with tracepoint provider probes as stand-alone shared objects.
+#
+# This makefile is purposefully kept simple to support GNU and BSD make.
 
-CC = gcc
 LIBS = -ldl    # On Linux
 #LIBS = -lc    # On BSD
-CFLAGS += -I.
-
-# Only necessary when building from the source tree and lttng-ust is not
-# installed
-ifdef BUILD_EXAMPLES_FROM_TREE
-CFLAGS += -I../../../include/
-LIBLTTNG_UST_PATH = ../../../liblttng-ust/.libs/
-LDFLAGS += -L$(LIBLTTNG_UST_PATH) -Wl,-rpath='$$ORIGIN/$(LIBLTTNG_UST_PATH)'
-
-# Third-party Makefiles have to define these targets to integrate with an
-# automake project
-EMPTY_AUTOMAKE_TARGETS = distdir install install-data install-exec uninstall \
-       install-dvi install-html install-info install-ps install-pdf \
-       installdirs check installcheck mostlyclean distclean maintainer-clean \
-       dvi html pdf ps info tags ctags
-.PHONY: $(EMPTY_AUTOMAKE_TARGETS)
-$(EMPTY_AUTOMAKE_TARGETS):
-endif
+LOCAL_CPPFLAGS += -I.
 
 all: demo lttng-ust-provider-ust-tests-demo.so lttng-ust-provider-ust-tests-demo3.so
 
 tp.o: tp.c ust_tests_demo.h
-       $(CC) $(CFLAGS) -fpic -c -o $@ $<
+       $(CC) $(CPPFLAGS) $(LOCAL_CPPFLAGS) $(AM_CFLAGS) $(AM_CPPFLAGS) \
+               $(CFLAGS) -fpic -c -o $@ $<
 
 tp2.o: tp2.c ust_tests_demo2.h
-       $(CC) $(CFLAGS) -fpic -c -o $@ $<
+       $(CC) $(CPPFLAGS) $(LOCAL_CPPFLAGS) $(AM_CFLAGS) $(AM_CPPFLAGS) \
+               $(CFLAGS) -fpic -c -o $@ $<
 
 lttng-ust-provider-ust-tests-demo.so: tp.o tp2.o
-       $(CC) -shared -o $@ $(LDFLAGS) -llttng-ust $+
+       $(CC) -shared -Wl,--no-as-needed -o $@ $(LDFLAGS) $(AM_CFLAGS) \
+               $(AM_LDFLAGS) $(CFLAGS) -llttng-ust tp.o tp2.o
 
 tp3.o: tp3.c ust_tests_demo3.h
-       $(CC) $(CFLAGS) -fpic -c -o $@ $<
+       $(CC) $(CPPFLAGS) $(LOCAL_CPPFLAGS) $(AM_CFLAGS) $(AM_CPPFLAGS) \
+               $(CFLAGS) -fpic -c -o $@ $<
 
 lttng-ust-provider-ust-tests-demo3.so: tp3.o
-       $(CC) -shared -o $@ $(LDFLAGS) -llttng-ust $+
+       $(CC) -shared -Wl,--no-as-needed -o $@ $(LDFLAGS) $(AM_CFLAGS) \
+               $(AM_LDFLAGS) $(CFLAGS) -llttng-ust tp3.o
 
 demo.o: demo.c
-       $(CC) $(CFLAGS) -c -o $@ $<
+       $(CC) $(CPPFLAGS) $(LOCAL_CPPFLAGS) $(AM_CFLAGS) $(AM_CPPFLAGS) \
+               $(CFLAGS) -c -o $@ $<
 
 demo: demo.o
-       $(CC) -o $@ $(LIBS) $+
+       $(CC) $(LDFLAGS) $(AM_CFLAGS) $(AM_LDFLAGS) $(CFLAGS) \
+               -o $@ demo.o $(LIBS)
 
 .PHONY: clean
 clean: