i'm trying to build a debug and release version of a library with a Makefile and copy those libraries to the relevant build directories, e.g.

.PHONY: all clean distclean

all: $(program_NAME_DEBUG)
    $(CP) $(program_NAME_DEBUG) $(BUILD_DIR)/debug/$(program_NAME_DEBUG)
    $(RM) $(program_NAME_DEBUG)
    $(RM) $(program_OBJS)
    $(program_NAME_RELEASE)
    $(CP) $(program_NAME_RELEASE) $(BUILD_DIR)/release/$(program_NAME_RELEASE)
    $(RM) $(program_NAME_RELEASE)
    $(RM) $(program_OBJS)

$(program_NAME_DEBUG): $(program_OBJS)
    $(LINK_DEBUG.c) -shared -Wl,-soname,$(program_NAME_DEBUG) $(program_OBJS) -o $(program_NAME_DEBUG)

$(program_NAME_RELEASE): $(program_OBJS)
    $(LINK_RELEASE.c) -shared -Wl,-soname,$(program_NAME_RELEASE) $(program_OBJS) -o $(program_NAME_RELEASE)

The 1st target in all (program_NAME_DEBUG) compiles OK but the 2nd, (program_NAME_RELEASE) produces the following error:

libGlamdring_rel.so
make: libGlamdring_rel.so: Command not found
make: *** [all] Error 127

libGlamdring_rel.so is the value of program_NAME_RELEASE

It doesn't seem to be recognising the 2nd target as it does the 1st?