[Flex-help] flex-2.5.37 says WARNING: netinet/in.h: present but cannot be compiled

[Dennis C. <dc...@bl...>]

So I have this older server I decided to build flex on .. and I saw this : 
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checking netinet/in.h usability... no
checking netinet/in.h presence... yes
configure: WARNING: netinet/in.h: present but cannot be compiled
configure: WARNING: netinet/in.h:     check for missing prerequisite headers?
configure: WARNING: netinet/in.h: see the Autoconf documentation
configure: WARNING: netinet/in.h:     section "Present But Cannot Be Compiled"
configure: WARNING: netinet/in.h: proceeding with the compiler's result
configure: WARNING:     ## ---------------------------------------------- ##
configure: WARNING:     ## Report this to fle...@li... ##
configure: WARNING:     ## ---------------------------------------------- ##
checking for netinet/in.h... no
checking regex.h usability... yes
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After running "make" anyways .. I eventually see : 

/opt/csw/gcc4/bin/gcc  -mno-app-regs -mcpu=v8 -mtune=supersparc -mno-vis -m32 -g -D_TS_ERRNO -Dsun=1 -Dunix=1 -D__sun=1 -D__unix=1 -D__SunOS_5_8 -D__SVR4=1 -DSOLARIS2=8 -D_POSIX_C_SOURCE=199506L -D_POSIX_PTHREAD_SEMANTICS -D_LARGEFILE64_SOURCE  -L/usr/local/lib -o flex ccl.o dfa.o ecs.o scanflags.o gen.o main.o misc.o nfa.o parse.o scan.o skel.o sym.o tblcmp.o yylex.o options.o scanopt.o buf.o tables.o tables_shared.o filter.o regex.o lib/libcompat.a /usr/local/lib/libintl.so /usr/local/lib/libiconv.so -lc -R/usr/local/lib -lm 
Undefined                       first referenced
 symbol                             in file
htonl                               tables.o
htons                               tables.o
ld: fatal: Symbol referencing errors. No output written to flex
collect2: ld returned 1 exit status
gmake[2]: *** [flex] Error 1
gmake[2]: Leaving directory `/usr/local/build/flex-2.5.37_SunOS5.8_sparc.001'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/local/build/flex-2.5.37_SunOS5.8_sparc.001'
gmake: *** [all] Error 2
$ 


Not too sure what to do with that.

Dennis