title: Please help me with the make file error in gcc compiler
body: <p>First of all : I am a newbee in linux.</p>
  
  <p>2nd -- I have seen <a href="https://stackoverflow.com/questions/18407917/what-is-missing-in-my-makefile">What is missing in my makefile?</a>
  but did not still get what is wrong with my make file. Though I am getting the same errors he was getting.
  Error that I am getting after running the makefile:</p>
  
  <pre><code>    user@ubuntu:~/Documents/Myfiles/Adaptive Doppler$ make adaptiveav
      gcc -o adaptiveav simpsimaav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o -g
      simpsimaav.o: In function `main':
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:179: undefined reference to `cos'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:180: undefined reference to `sin'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:299: undefined reference to `sin'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:299: undefined reference to `sin'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:299: undefined reference to `sin'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:325: undefined reference to `sqrt'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:325: undefined reference to `sqrt'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:326: undefined reference to `cos'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:327: undefined reference to `sin'
      simpsimaav.o: In function `rayleigh':
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:418: undefined reference to `log'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:418: undefined reference to `sqrt'
      /home/user/Documents/Myfiles/Adaptive Doppler/simpsimaav.c:421: undefined reference to `sqrt'
      four1.o: In function `four1':
      /home/user/Documents/Myfiles/Adaptive Doppler/four1.c:47: undefined reference to `sin'
      /home/user/Documents/Myfiles/Adaptive Doppler/four1.c:49: undefined reference to `sin'
      collect2: error: ld returned 1 exit status
      make: *** [adaptiveav] Error 1
  
  -------------------------------------------------------------
  </code></pre>
  
  <p>My make file :</p>
  
  <pre><code>    OBJS= main.o do_fft.o find_m.o read_sig.o write_out.o allocin.o\
      getopts.o read_form.o read_bin.o optlist.o usage.o normalize.o \
      enquire.o init_fft.o subdc.o skip.o shortfile.o open_out.o \
      han_win.o getyn.o record.o do_mom.o frq_arry.o four1.o look_nfo.o\
      do_peak.o coefs_out.o do_smooth.o do_maxf.o accum.o pspect.o except.o\
      get_info.o open_in.o test_read.o getstr.o getint.o open_nfo.o line_flush.o \
      simpsim1.o
  
  
      # Note: these routines are found in Lib/lib.ar
      LIBOBJS= debug.c div_by.c getint.c getstr.c \
      init_ap.c look_nfo.c open_in.c open_nfo.c test_read.c
  
      # LIBS= -lm /usr/local/src/Cspect/Lib/lib.ar -lfpe
      LIBS = -lm
  
      CFLAGS= -g
      rtest: rtest.o realft.o four1.o
          gcc -o rtest rtest.o realft.o four1.o -lm $(CFLAGS)
      itest: itest.o realft.o four1.o
          gcc -o itest itest.o realft.o four1.o -lm $(CFLAGS)
      test: test.o four1.o
          gcc -o test test.o four1.o -lm $(CFLAGS)
      invtest: invtest.o four1.o
          gcc -o invtest invtest.o four1.o -lm $(CFLAGS)
      tabtest: test.o ffttab.o
          gcc -o test test.o ffttab.o -lm $(CFLAGS)
  
      cspect: ${OBJS}
          gcc -o cspect.exe ${OBJS} ${LIBS} ${CFLAGS}
  
      rdtest: rdtest.o read_form.o
          gcc -o rdtest rdtest.o read_form.o -g
  
      fttest: sine.o do_fft.o four1.o subdc.o do_peak.o
          gcc -o fttest sine.o do_fft.o four1.o subdc.o do_peak.o 
  
      adaptive: simpsima.o findvel.o do_fft.o four1.o subdc.o do_peak.o
          gcc -o adaptive simpsima.o findvel.o do_fft.o four1.o subdc.o do_peak.o -g
  
      notadaptive: simpsimna.o findvel.o do_fft.o four1.o subdc.o do_peak.o
          gcc -o notadaptive simpsimna.o findvel.o do_fft.o four1.o subdc.o do_peak.o -g
  
      adaptivevold:  simpsimavold.o findvel.o do_fft.o four1.o subdc.o do_peak.o
          gcc -o adaptivevold simpsimavold.o findvel.o do_fft.o four1.o subdc.o do_peak.o
  
      adaptivev:  simpsimav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o
          gcc -o adaptivev simpsimav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o -g
  
  
      notadaptivev: simpsimnav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o
          gcc -o notadaptivev simpsimnav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o -g
  
  
      adaptiveav:  simpsimaav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o
          gcc -o adaptiveav simpsimaav.o findvel.o do_fft.o four1.o subdc.o do_peak_n.o -g
  
  
      .c.o:
          gcc -c ${CFLAGS} $*.c
  
      #simpsim.o: simpsim.c
      #   gcc -c simpsim1.c
  
      : spect
      strip spect
      chmod 755 spect
      chgrp user spect
      mv spect /usr/local/bin
  </code></pre>
  
  <hr>
  
  <p>This is not the directory where my lib.ar is : Is it probably for this?</p>
  
  <pre><code># LIBS= -lm /usr/local/src/Cspect/Lib/lib.ar -lfpe
  LIBS = -lm" 
  </code></pre>
  
  <p>and I dont want you to do my  works... just suggest me anything... or any useful website where they talk about these things...</p>
  
  <p>I hope not to get rude comments just because I am new. </p>
  
  <p>Thanks.</p>