Try linking to the .a file at compile time: gcc -G -I/usr/informix/incl/tools -I/usr/j2sdk1.4.2_04/include -I/usr/j2sdk1.4.2_04/include/solaris -B/usr/fourgen/lib/NewSource/Lib/Dbase/h_encrypt.src aes_jni_encryption.c -lsomelib -o libpodenc.so Thanks, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Podadmin Sent: Monday, July 19, 2004 11:01 AM To: gcc-help@xxxxxxxxxxx Subject: Compiling in a .a file This seems like it shouldn't be too hard to do, but maybe it can't be done. I am trying to simply compile one .c file into a .so file. The problem is that the .c file uses a third party library and they only gave a .h and a .a file. Here is what I have so far: gcc -G -I/usr/informix/incl/tools -I/usr/j2sdk1.4.2_04/include -I/usr/j2sdk1.4.2 _04/include/solaris -B/usr/fourgen/lib/NewSource/Lib/Dbase/h_encrypt.src aes_jni _encryption.c -o libpodenc.so This compiles correctly but when I run my application it cannot find the function call in the .a file. Is there a way to compile a .a file into my .so file? Thanks for any help anybody can give.