本地头文件在项目中可用,但make不提供此类文件或目录错误

从一整天开始,我都在尝试安装OverSim[ http://www.oversim.org/wiki/OverSimInstall]

all: checkmakefiles
    cd src && $(MAKE)

clean: checkmakefiles
    cd src && $(MAKE) clean

cleanall: checkmakefiles
    cd src && $(MAKE) MODE=release clean
    cd src && $(MAKE) MODE=debug clean
    rm -f src/Makefile

makefiles:
    cd src && opp_makemake -f --deep --make-so -o inet -O out $$NSC_VERSION_DEF

checkmakefiles:
    @if [ ! -f src/Makefile ]; then \
    echo; \
    echo '======================================================================='; \
    echo 'src/Makefile does not exist. Please use "make makefiles" to generate it!'; \
    echo '======================================================================='; \
    echo; \
    exit 1; \
    fi

doxy:
    doxygen doxy.cfg

tcptut:
    cd doc/src/tcp && $(MAKE)

我使用的是Omnet5.1.1,因为Ubuntu16.04不支持omnet4.2.2,我的gcc版本是5.4.1。

每次我尝试构建这个make all时,都会出现头文件未找到错误,实际上头文件位于项目目录中。

In file included from applications/ethernet/EtherAppCli.cc:21:0:
applications/ethernet/EtherAppCli.h:21:22: fatal error: INETDefs.h: No such file or directory

#include "INETDefs.h" //available at src/linklayer/contract/
#include "MACAddress.h" //available at src/base/

项目结构: