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[Josephine Kakande <jnkakande@xxxxxxxxx>]

Hi Yasser,

Thanks a lot for the feedback and suggestions.


> Hello,
>
> I had a problem similar to this when trying to link statically with rohc
> libraries, and found that the order of libraries to link is important.
>
> Here is the commands i use to link with rohc libraries:
>
> Compiling my application (rohc_proc.c):
>
> gcc -I./../RoHC-1.1.0 -I./../RoHC-1.1.0/include -c rohc_proc.c -o
> rohc_proc.o
>
> Then, Linking my application with rohc libraries:
>
> gcc -static -L./../RoHC-1.1.0/lib -lrohc_decomp -lrohc_comp
> -lrohc_common -lm
>
> I noticed also you use absolute path in includes used in your
> application:
>
> #include "/home/josie/rohc-1.2.0/src/common/rohc.h"
> #include "/home/josie/rohc-1.2.0/src/comp/rohc_comp.h"
>
> i think it should be replaced by:
>
> #include "rohc.h"
> #include "rohc_comp.h"
>

Thanks for the suggestion, I made the changes to the includes.


>
> and -I./../RoHC-1.2.0/include in the compilation flags should take care
> of translating this includes to absolute path.
>
> Can you please provide the commands or makefile you use for building
> your application with rohc library, and if you try to build it
> statically?
>


I've recompiled with this command and this is the error output:


$ gcc packetforwardrohc.c -o packetforwardrohc -I/usr/include -L/usr/lib
-lpcap `libnet-config --defines --cflags --libs` -lrohc_comp -lrohc_common
-lm


In file included from headers.h:8,
                 from packetforwardrohc.c:24:
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: its scope is only
this definition or declaration, which is probably not what you want
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:205: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:210: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:279: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:280: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:290: warning: ‘struct ip_packet’
declared inside parameter list
In file included from packetforwardrohc.c:24:
headers.h:14:1: warning: "ETHER_ADDR_LEN" redefined
In file included from /usr/include/libnet.h:57,
                 from packetforwardrohc.c:23:
/usr/include/net/ethernet.h:52:1: warning: this is the location of the
previous definition
packetforwardrohc.c: In function ‘got_packet’:
packetforwardrohc.c:509: warning: passing argument 2 of ‘rohc_compress’
discards qualifiers from pointer target type
/usr/lib/gcc/i486-linux-gnu/4.2.4/../../../../lib/crt1.o: In function
`_start':
(.text+0x18): undefined reference to `main'
collect2: ld returned 1 exit status

*Statically*


$ gcc -I./../rohc-1.2.0 -I./../rohc-1.2.0/src -c packetforward.c -o
packetforward.o

In file included from packetforward.c:8:
/usr/include/libnet.h:87:2: error: #error "byte order has not been
specified, you'll" "need to #define either LIBNET_LIL_ENDIAN or
LIBNET_BIG_ENDIAN.  See the" "documentation regarding the libnet-config
script."
In file included from headers.h:8,
                 from packetforward.c:9:
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: its scope is only
this definition or declaration, which is probably not what you want
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:205: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:210: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:279: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:280: warning: ‘struct ip_packet’
declared inside parameter list
/home/josie/rohc-1.2.0/src/comp/rohc_comp.h:290: warning: ‘struct ip_packet’
declared inside parameter list
packetforward.c:648:2: warning: no newline at end of file


$ gcc -static -L./../rohc-1.2.0/ -lrohc_decomp -lrohc_comp -lrohc_common -lm

/usr/lib/gcc/i486-linux-gnu/4.2.4/../../../../lib/crt1.o: In function
`_start':
(.text+0x18): undefined reference to `main'
collect2: ld returned 1 exit status
josie@josie-laptop:~/packetforward$

Kindly advise.

Thanks,
Josephine


>
> On Wed, 2009-10-07 at 22:49 +0200, Josephine Kakande wrote:
> > Hello,
> >
> > I'm wondering if anyone has been able to figure out a solution to my
> > problem.
> >
> > I'd really appreciate your feedback.
> >
> > Thanks and regards,
> > Josephine
> >
> > On Wed, Sep 23, 2009 at 11:27 AM, Josephine Kakande
> > <jnkakande@xxxxxxxxx> wrote:
> >
> >         Hello,
> >
> >         I'm trying to use the rohc-compressor in a program I'm using
> >         for packet injection.
> >
> >         However I get the following error when i attempt to compile :
> >
> >
> >         In file included from headers.h:8,
> >                          from packetforwardrohc.c:9:
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning:
> >         ‘struct ip_packet’ declared inside parameter list
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: its
> >         scope is only this definition or declaration, which is
> >         probably not what you want
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:205: warning:
> >         ‘struct ip_packet’ declared inside parameter list
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:210: warning:
> >         ‘struct ip_packet’ declared inside parameter list
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:279: warning:
> >         ‘struct ip_packet’ declared inside parameter list
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:280: warning:
> >         ‘struct ip_packet’ declared inside parameter list
> >         /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:290: warning:
> >         ‘struct ip_packet’ declared inside parameter list
> >         In file included from packetforwardrohc.c:9:
> >         headers.h:14:1: warning: "ETHER_ADDR_LEN" redefined
> >         In file included from /usr/include/libnet.h:57,
> >                          from packetforwardrohc.c:8:
> >         /usr/include/net/ethernet.h:52:1: warning: this is the
> >         location of the previous definition
> >         packetforwardrohc.c: In function ‘got_packet’:
> >         packetforwardrohc.c:494: warning: passing argument 2 of
> >         ‘rohc_compress’ discards qualifiers from pointer target type
> >         /usr/lib/gcc/i486-linux-gnu/4.2.4/../../../../lib/crt1.o: In
> >         function `_start':
> >         (.text+0x18): undefined reference to `main'
> >         /tmp/cc2r5eZ0.o: In function `got_packet':
> >         packetforwardrohc.c:(.text+0xd38): undefined reference to
> >         `rohc_compress'
> >         /tmp/cc2r5eZ0.o: In function `main.5994':
> >         packetforwardrohc.c:(.text+0xe08): undefined reference to
> >         `crc_get_polynom'
> >         packetforwardrohc.c:(.text+0xe16): undefined reference to
> >         `crc_table_3'
> >         packetforwardrohc.c:(.text+0xe1b): undefined reference to
> >         `crc_init_table'
> >         packetforwardrohc.c:(.text+0xe27): undefined reference to
> >         `crc_get_polynom'
> >         packetforwardrohc.c:(.text+0xe35): undefined reference to
> >         `crc_table_7'
> >         packetforwardrohc.c:(.text+0xe3a): undefined reference to
> >         `crc_init_table'
> >         packetforwardrohc.c:(.text+0xe46): undefined reference to
> >         `crc_get_polynom'
> >         packetforwardrohc.c:(.text+0xe54): undefined reference to
> >         `crc_table_8'
> >         packetforwardrohc.c:(.text+0xe59): undefined reference to
> >         `crc_init_table'
> >         packetforwardrohc.c:(.text+0xe7d): undefined reference to
> >         `rohc_alloc_compressor'
> >         packetforwardrohc.c:(.text+0xffa): undefined reference to
> >         `rohc_activate_profile'
> >         packetforwardrohc.c:(.text+0x1010): undefined reference to
> >         `rohc_activate_profile'
> >         packetforwardrohc.c:(.text+0x1026): undefined reference to
> >         `rohc_activate_profile'
> >         packetforwardrohc.c:(.text+0x103c): undefined reference to
> >         `rohc_activate_profile'
> >         packetforwardrohc.c:(.text+0x1052): undefined reference to
> >         `rohc_activate_profile'
> >         packetforwardrohc.c:(.text+0x121f): undefined reference to
> >         `rohc_alloc_compressor'
> >         packetforwardrohc.c:(.text+0x13a1): undefined reference to
> >         `rohc_free_compressor'
> >         collect2: ld returned 1 exit status
> >
> >
> >         Could you tell me what I might be doing wrong? Attached is the
> >         sample code.
> >
> >         Would really appreciate your feedback, thanks.
> >
> >         Regards,
> >         Josephine
> >
> >
> >
> >
> >
> >
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