cygwin gcc compiling issues


    May 24 2007 | 9:41 pm
    Finally trodding into the development terrain, so much to learn about C it makes me sick. Just downloaded and installed every package possible for cygwin for my xp machine. I'm going through the max/msp sdk docs, got the minimum external to compile no problems however whenever I try to compile any msp objects I get:
    $ gcc -shared -mno-cygwin -o lores~.mxe lores~.o lores~.def -L../../c74support/ max-includes -L../../c74support/msp-includes -lMaxAPI lores~.o:lores~.c:(.text+0x56): undefined reference to `_z_dsp_free'
    lores~.o:lores~.c:(.text+0xeb): undefined reference to `_z_add_signalmethod' lores~.o:lores~.c:(.text+0x1d3): undefined reference to `_dsp_add' lores~.o:lores~.c:(.text+0x234): undefined reference to `_dsp_add' lores~.o:lores~.c:(.text+0xf37): undefined reference to `_z_dsp_setup' lores~.o:lores~.c:(.text+0xf74): undefined reference to `_sys_getsr' collect2: ld returned 1 exit status
    Any suggestions or points to the right source of infos would greatly be appreciated. Thanks in advance.

    • May 24 2007 | 9:49 pm
      Yo Tyler! #include "z_dsp.h"?
      Ben
      On 5/24/07, Tyler Nitsch wrote: > > Finally trodding into the development terrain, so much to learn about C it makes me sick. Just downloaded and installed every package possible for cygwin for my xp machine. I'm going through the max/msp sdk docs, got the minimum external to compile no problems however whenever I try to compile any msp objects I get: > > > $ gcc -shared -mno-cygwin -o lores~.mxe lores~.o lores~.def -L../../c74support/ > max-includes -L../../c74support/msp-includes -lMaxAPI > lores~.o:lores~.c:(.text+0x56): undefined reference to `_z_dsp_free'
      > lores~.o:lores~.c:(.text+0xeb): undefined reference to `_z_add_signalmethod' > lores~.o:lores~.c:(.text+0x1d3): undefined reference to `_dsp_add' > lores~.o:lores~.c:(.text+0x234): undefined reference to `_dsp_add' > lores~.o:lores~.c:(.text+0xf37): undefined reference to `_z_dsp_setup' > lores~.o:lores~.c:(.text+0xf74): undefined reference to `_sys_getsr' > collect2: ld returned 1 exit status > > Any suggestions or points to the right source of infos would greatly be appreciated. Thanks in advance. >
    • May 24 2007 | 10:02 pm
      Hey Ben.
      Just to make sure from what I'm gathering the includey statements go in the top lines of your .c program. I'm using the lores~.c as given in the sdk.. which does include this #include "z_dsp.h" at the top. Is this what your talking about? I'm following the steps given in the Cygwin_gcc_Howto.rtf manual exactly except replacing minimimum wiht lores~ and adding the additional lines -I../../c74support/msp-includes in step 1 and -L../../c74support/msp-includes in step 2
      perhaps having the two -L in the gcc command is making things weird.
    • May 24 2007 | 10:11 pm
      Well, I don't know - I don't have any experience with gcc on cygwin. The gcc builds we do on Mac use the -I flag, not -L -- is it possible that's the problem?
      Ben
    • May 24 2007 | 10:16 pm
      -I is for headers -L is for libraries.
      _Mark
      On May 24, 2007, at 3:11 PM, Ben Nevile wrote:
      > Well, I don't know - I don't have any experience with gcc on cygwin. > The gcc builds we do on Mac use the -I flag, not -L -- is it possible > that's the problem? > > Ben
    • May 24 2007 | 10:17 pm
      No it still won't work. I'll have a fresh go at it tommorow... thanks for the help!!!
    • May 24 2007 | 10:26 pm
      Ahhhh yeah headers and libraries. Thanks Mark. It finally compiled by entering..
      gcc -shared -mno-cygwin -o minimum.mxe minimum.o minimum.def -L../../c74support/max-includes -L../../c74support/msp-includes -lMaxAPI -lMaxAudio
      seems I wasnt' linking to the MaxAudio.lib