title: makefile ifeq analog
body: <p>I have really big sources with alot of different makefiles.<br>
  And now i need add one little condition there, where i can check if line contain what i want then i should use some symbols.<br>
  I know that <code>ifeq</code> must be placed at 0 column. 
  But I  cant chage whole sources only for this condition.<br>
   How i can check what conatains in variable without <code>ifeq</code>?
  I have something like this in define function:</p>
  
  <pre><code>$(gen_cpp_objects): $(intermediates)/%.o: \
      $(intermediates)/%$(LOCAL_CPP_EXTENSION) $(yacc_cpps) \
      $(proto_generated_headers)  $(my_compiler_dependencies) \
      $(LOCAL_ADDITIONAL_DEPENDENCIES)
          $(transform-$(PRIVATE_HOST)cpp-to-o)
  </code></pre>
  
  <p>And i need insert condition into <code>$(transform-$(PRIVATE_HOST)cpp-to-o)</code></p>
  
  <p>i want something like this:</p>
  
  <pre><code>file:=somefile.someextension
  define transform-cpp-to-o
  @mkdir -p $(dir $@)
  @echo "target $(PRIVATE_ARM_MODE) C++: $(PRIVATE_MODULE) &lt;= $&lt;"
  ifeq ($(strip $&lt;),$(file))
  #Do something here
  endif
  $(hide) $(PRIVATE_CXX) \
          $(addprefix -I , $(PRIVATE_C_INCLUDES)) \
  </code></pre>