-lresolv is not present on SCO Unix, RT#460.

Configure

@@ -433,8 +433,8 @@ my %table=(
 "OpenUNIX-8-gcc","gcc:-O -DFILIO_H -fomit-frame-pointer::-pthread::-lsocket -lnsl:BN_LLONG MD2_CHAR RC4_INDEX ${x86_gcc_des}:${x86_elf_asm}:dlfcn:svr5-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "sco3-gcc",  "gcc:-O3 -fomit-frame-pointer -Dssize_t=int -DNO_SYS_UN_H::(unknown)::-lsocket:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:::", # the SCO assembler doesn't seem to like our assembler files ...
 # SCO 5 - Ben Laurie <ben@algroup.co.uk> says the -O breaks the SCO cc.
-"sco5-cc",  "cc:-belf::(unknown)::-lsocket -lresolv -lnsl:${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-Kpic",
-"sco5-gcc",  "gcc:-O3 -fomit-frame-pointer::(unknown)::-lsocket -lresolv -lnsl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-fPIC",
+"sco5-cc",  "cc:-belf::(unknown)::-lsocket -lnsl:${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-Kpic",
+"sco5-gcc",  "gcc:-O3 -fomit-frame-pointer::(unknown)::-lsocket -lnsl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-fPIC",
 
 
 # IBM's AIX.