C语言db2嵌入式SQL编程，编译问题 undefined reference to `sqlastrt'

gcc -o sql.out -I/opt/ibm/db2/V9.7/include  sql.c
/tmp/cc2VoAjZ.o: In function `main':
sql.c:(.text+0x21): undefined reference to `sqlastrt'
sql.c:(.text+0x45): undefined reference to `sqlaaloc'
sql.c:(.text+0x99): undefined reference to `sqlasetdata'
sql.c:(.text+0xc5): undefined reference to `sqlacall'
sql.c:(.text+0xd1): undefined reference to `sqlastop'
sql.c:(.text+0xf5): undefined reference to `sqlastrt'
sql.c:(.text+0x119): undefined reference to `sqlaaloc'
sql.c:(.text+0x16d): undefined reference to `sqlasetdata'
sql.c:(.text+0x199): undefined reference to `sqlacall'
sql.c:(.text+0x1a5): undefined reference to `sqlastop'