make: Nothing to be done for 'all'. in Omnet

Question

After Installng Omnetpp 5.5.1 in Ubuntu 18.04,For any folder in Omnetpp, make command is not making any sense. As it showing the following message:

make: Nothing to be done for 'all'.

Even suggested methods on Internet are not working in my case.Please help. My makefile is following for Aloha Folder.

#
# OMNeT++/OMNEST Makefile for aloha
#
# This file was generated with the command:
#  opp_makemake -f --deep
#

# Name of target to be created (-o option)
TARGET = aloha$(D)$(EXE_SUFFIX)
TARGET_DIR = .

# User interface (uncomment one) (-u option)
USERIF_LIBS = $(ALL_ENV_LIBS) # that is, $(TKENV_LIBS) $(QTENV_LIBS) $(CMDENV_LIBS)
#USERIF_LIBS = $(CMDENV_LIBS)
#USERIF_LIBS = $(TKENV_LIBS)
#USERIF_LIBS = $(QTENV_LIBS)

# C++ include paths (with -I)
INCLUDE_PATH =

# Additional object and library files to link with
EXTRA_OBJS =

# Additional libraries (-L, -l options)
LIBS =

# Output directory
PROJECT_OUTPUT_DIR = out
PROJECTRELATIVE_PATH =
O = $(PROJECT_OUTPUT_DIR)/$(CONFIGNAME)/$(PROJECTRELATIVE_PATH)

# Object files for local .cc, .msg and .sm files
OBJS = $O/Host.o $O/Server.o

# Message files
MSGFILES =

# SM files
SMFILES =

#------------------------------------------------------------------------------

# Pull in OMNeT++ configuration (Makefile.inc)

ifneq ("$(OMNETPP_CONFIGFILE)","")
CONFIGFILE = $(OMNETPP_CONFIGFILE)
else
ifneq ("$(OMNETPP_ROOT)","")
CONFIGFILE = $(OMNETPP_ROOT)/Makefile.inc
else
CONFIGFILE = $(shell opp_configfilepath)
endif
endif

ifeq ("$(wildcard $(CONFIGFILE))","")
$(error Config file '$(CONFIGFILE)' does not exist -- add the OMNeT++ bin directory to the path so that opp_configfilepath can be found, or set the OMNETPP_CONFIGFILE variable to point to Makefile.inc)
endif

include $(CONFIGFILE)

# Simulation kernel and user interface libraries
OMNETPP_LIBS = $(OPPMAIN_LIB) $(USERIF_LIBS) $(KERNEL_LIBS) $(SYS_LIBS)

COPTS = $(CFLAGS) $(IMPORT_DEFINES)  $(INCLUDE_PATH) -I$(OMNETPP_INCL_DIR)
MSGCOPTS = $(INCLUDE_PATH)
SMCOPTS =

# we want to recompile everything if COPTS changes,
# so we store COPTS into $COPTS_FILE and have object
# files depend on it (except when "make depend" was called)
COPTS_FILE = $O/.last-copts
ifneq ("$(COPTS)","$(shell cat $(COPTS_FILE) 2>/dev/null || echo '')")
$(shell $(MKPATH) "$O" && echo "$(COPTS)" >$(COPTS_FILE))
endif

#------------------------------------------------------------------------------
# User-supplied makefile fragment(s)
# >>>
# <<<
#------------------------------------------------------------------------------

# Main target
all: $(TARGET_DIR)/$(TARGET)

$(TARGET_DIR)/% :: $O/%
    @mkdir -p $(TARGET_DIR)
    $(Q)$(LN) $< $@
ifeq ($(TOOLCHAIN_NAME),clangc2)
    $(Q)-$(LN) $(<:%.dll=%.lib) $(@:%.dll=%.lib)
endif

$O/$(TARGET): $(OBJS)  $(wildcard $(EXTRA_OBJS)) Makefile $(CONFIGFILE)
    @$(MKPATH) $O
    @echo Creating executable: $@
    $(Q)$(CXX) $(LDFLAGS) -o $O/$(TARGET) $(OBJS) $(EXTRA_OBJS) $(AS_NEEDED_OFF) $(WHOLE_ARCHIVE_ON) $(LIBS) $(WHOLE_ARCHIVE_OFF) $(OMNETPP_LIBS)

.PHONY: all clean cleanall depend msgheaders smheaders

.SUFFIXES: .cc

$O/%.o: %.cc $(COPTS_FILE) | msgheaders smheaders
    @$(MKPATH) $(dir $@)
    $(qecho) "$<"
    $(Q)$(CXX) -c $(CXXFLAGS) $(COPTS) -o $@ $<

%_m.cc %_m.h: %.msg
    $(qecho) MSGC: $<
    $(Q)$(MSGC) -s _m.cc -MD -MP -MF $O/$(basename $<)_m.h.d $(MSGCOPTS) $?

%_sm.cc %_sm.h: %.sm
    $(qecho) SMC: $<
    $(Q)$(SMC) -c++ -suffix cc $(SMCOPTS) $?

msgheaders: $(MSGFILES:.msg=_m.h)

smheaders: $(SMFILES:.sm=_sm.h)

clean:
    $(qecho) Cleaning $(TARGET)
    $(Q)-rm -rf $O
    $(Q)-rm -f $(TARGET_DIR)/$(TARGET)
    $(Q)-rm -f $(TARGET_DIR)/$(TARGET:%.dll=%.lib)
    $(Q)-rm -f $(call opp_rwildcard, . , *_m.cc *_m.h *_sm.cc *_sm.h)

cleanall:
    $(Q)$(MAKE) -s clean MODE=release
    $(Q)$(MAKE) -s clean MODE=debug
    $(Q)-rm -rf $(PROJECT_OUTPUT_DIR)

# include all dependencies
-include $(OBJS:%=%.d) $(MSGFILES:%.msg=$O/%_m.h.d)

This aforementioned file is missing some information like c++ INCLUDE_PATH and EXTRA_OBJS and LIBS.Is this the reason for not being run?Please Help.

Answer 1

The makefile says that 'Nothing to be done' because the executable is present and up to date, so it is indeed nothing to be done. This is not an error.

As you have indicated, you can execute ./aloha and then that throws a runtime error. This is NOT related to the build process.