Problems in HelloWorldImp.c compilation

Hi I'm newbie to this JNI.
i wrote a sample program "HelloWorld.java" as guided in sun's jni tutorial. but when i come to creating shared libraries step i'm getting error like
[root@B138 JNI]# cc -G -I/opt/j2sdk_nb/j2sdk1.4.2/include -I/opt/j2sdk_nb/j2sdk1.4.2/include/linux \HelloWorldImp.c -o libhello.so cc: unrecognized option `-G' /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crt1.o(.text+0x18): In function `_start': ../sysdeps/i386/elf/start.S:77: undefined reference to `main'
collect2: ld returned 1 exit status
actually i'm doing this under redhat linux 9. and using j2sdk1.4.2 i installed j2sdk-1_4_2-nb-3_5_1-bin-linux.bin (j2sdk + netbeans pack) and installed in /opt/j2sdk_nb directory. all my java programs are working normally. no probs with them.
actually i don't know what that -G and -I options will do. i tried "cc --help" but no option like -G so i just experiment with some more possibilities like .. and their outputs
[root@B138 JNI]# gcc -G -I/opt/j2sdk_nb/j2sdk1.4.2/include -I/opt/j2sdk_nb/j2sdk1.4.2/include/linux \HelloWorldImp.c -o libhello.so gcc: unrecognized option `-G' /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crt1.o(.text+0x18): In function `_start': ../sysdeps/i386/elf/start.S:77: undefined reference to `main'
collect2: ld returned 1 exit status
[root@B138 JNI]# gcc -g -I/opt/j2sdk_nb/j2sdk1.4.2/include -I/opt/j2sdk_nb/j2sdk1.4.2/include/linux \HelloWorldImp.c -o libhello.so /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crt1.o(.text+0x18): In function `_start': ../sysdeps/i386/elf/start.S:77: undefined reference to `main'
collect2: ld returned 1 exit status
every time i'm getting this error...i don't know how to solve this...should i include main function in that HelloWorlsImp.c file?.
I know this might be a silly thing.. but as a newbie i don't know what to do.
plz help me... Vali

Hallo,
I am no Linux expert so I cannot help you directly, but I do know that similar queries have been answered in the past in this forum. Try searching the forum.

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