title: linux/bin/ld: cannot find -lrtdk Xenomai
body: <pre><code>/usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: cannot find -lrtdk
  </code></pre>
  
  <p>I can't find anything regarding this in the ld's manpage.<br>
  <a href="http://www.cs.ru.nl/lab/xenomai/exercises/ex01/Exercise-1.html" rel="nofollow">http://www.cs.ru.nl/lab/xenomai/exercises/ex01/Exercise-1.html</a><br>
  Following is the Makefile:</p>
  
  <pre><code>    ###### CONFIGURATION ######
  
  ### List of applications to be build
  APPLICATIONS = hello
  
  ### Note: to override the search path for the xeno-config script, use "make XENO=..."
  
  
  ### List of modules to be build
  MODULES =
  
  ### Note: to override the kernel source path, use "make KSRC=..."
  
  
  
  ###### USER SPACE BUILD (no change required normally) ######
  ifeq ($(KERNELRELEASE),)
  ifneq ($(APPLICATIONS),)
  
  ### Default Xenomai installation path
  XENO ?= /usr/xenomai
  
  XENOCONFIG=$(shell PATH=$(XENO):$(XENO)/bin:$(PATH) which xeno-config 2&gt;/dev/null)
  
  ### Sanity check
  ifeq ($(XENOCONFIG),)
  all::
      @echo "&gt;&gt;&gt; Invoke make like this: \"make XENO=/path/to/xeno-config\" &lt;&lt;&lt;"
      @echo
  endif
  
  
  CC=$(shell $(XENOCONFIG) --cc)
  
  CFLAGS=$(shell $(XENOCONFIG) --xeno-cflags) $(MY_CFLAGS)
  
  LDFLAGS=$(shell $(XENOCONFIG) --xeno-ldflags) $(MY_LDFLAGS) -lnative
  
  # This includes the library path of given Xenomai into the binary to make live
  # easier for beginners if Xenomai's libs are not in any default search path.
  LDFLAGS+=-Xlinker -rpath -Xlinker $(shell $(XENOCONFIG) --libdir)
  
  LDFLAGS+= -lrtdk
  
  all:: $(APPLICATIONS)
  
  clean::
      $(RM) $(APPLICATIONS) *.o
  
  endif
  endif
  
  
  
  ###### SPECIAL TARGET RULES ######
  rtprint: rtprint.c
      $(CC) $(CFLAGS) $? $(LDFLAGS) -lrtdk -o $@
  
  
  
  ###### KERNEL MODULE BUILD (no change required normally) ######
  ifneq ($(MODULES),)
  
  ### Default to sources of currently running kernel
  KSRC ?= /lib/modules/$(shell uname -r)/build
  
  OBJS     := ${patsubst %, %.o, $(MODULES)}
  CLEANMOD := ${patsubst %, .%*, $(MODULES)}
  PWD      := $(shell if [ "$$PWD" != "" ]; then echo $$PWD; else pwd; fi)
  
  ### Kernel 2.6
  ifeq ($(findstring 2.6,$(KSRC)),2.6)
  
  obj-m        := $(OBJS)
  EXTRA_CFLAGS := -I$(KSRC)/include/xenomai -I$(KSRC)/include/xenomai/posix $(ADD_CFLAGS)
  
  all::
      $(MAKE) -C $(KSRC) SUBDIRS=$(PWD) modules
  
  ### Kernel 2.4
  else
  
  ARCH    ?= $(shell uname -i)
  INCLUDE := -I$(KSRC)/include/xenomai -I$(KSRC)/include/xenomai/compat -I$(KSRC)/include/xenomai/posix
  CFLAGS  += $(shell $(MAKE) -s -C $(KSRC) CC=$(CC) ARCH=$(ARCH) SUBDIRS=$(PWD) modules) $(INCLUDE)
  
  all:: $(OBJS)
  
  endif
  
  ## Target for capturing 2.4 module CFLAGS
  modules:
      @echo "$(CFLAGS)"
  
  clean::
      $(RM) $(CLEANMOD) *.o *.ko *.mod.c Module*.symvers
      $(RM) -R .tmp*
  
  endif
  </code></pre>
  
  <p>Please help.</p>