flex 2.5.31 does not compile on AIX 5.2

[Madeleine Yeh]

I tried to compile flex 2.5.31 on AIX 5.2 using the IBM cc compiler.
It stopped with the following error message.
  If there is any information I can send you, just ask
    Thanks
       Madeleine Yeh


cc -DHAVE_CONFIG_H -I. -I. -I.
-DLOCALEDIR=\"/fsapps/test/fssys/share/locale\"
-I/fsapps/test/fssys/include -I./intl   -g -c `test -f 'gen.c' || echo
'./'`gen.c
"flexdef.h", line 205.9: 1506-236 (W) Macro name INFINITY has been
redefined.
"flexdef.h", line 205.9: 1506-358 (I) "INFINITY" is defined on line 73 of
/usr/include/math.h.
source='main.c' object='main.o' libtool=no \
depfile='.deps/main.Po' tmpdepfile='.deps/main.TPo' \
depmode=aix /bin/sh ./depcomp \
cc -DHAVE_CONFIG_H -I. -I. -I.
-DLOCALEDIR=\"/fsapps/test/fssys/share/locale\"
-I/fsapps/test/fssys/include -I./intl   -g -c `test -f 'main.c' || echo
'./'`main.c
"flexdef.h", line 205.9: 1506-236 (W) Macro name INFINITY has been
redefined.
"flexdef.h", line 205.9: 1506-358 (I) "INFINITY" is defined on line 73 of
/usr/include/math.h.
"main.c", line 1145.25: 1506-046 (S) Syntax error.
"main.c", line 1260.25: 1506-046 (S) Syntax error.
"main.c", line 1317.25: 1506-046 (S) Syntax error.
"main.c", line 1321.25: 1506-046 (S) Syntax error.
"main.c", line 1325.25: 1506-046 (S) Syntax error.
"main.c", line 1329.25: 1506-046 (S) Syntax error.
"main.c", line 1333.25: 1506-046 (S) Syntax error.
"main.c", line 1337.25: 1506-046 (S) Syntax error.
"main.c", line 1341.25: 1506-046 (S) Syntax error.
"main.c", line 1345.25: 1506-046 (S) Syntax error.
"main.c", line 1349.25: 1506-046 (S) Syntax error.
"main.c", line 1353.25: 1506-046 (S) Syntax error.
"main.c", line 1357.25: 1506-046 (S) Syntax error.
"main.c", line 1361.25: 1506-046 (S) Syntax error.
"main.c", line 1365.25: 1506-046 (S) Syntax error.
"main.c", line 1369.25: 1506-046 (S) Syntax error.
"main.c", line 1373.25: 1506-046 (S) Syntax error.
"main.c", line 1377.25: 1506-046 (S) Syntax error.
"main.c", line 1381.25: 1506-046 (S) Syntax error.
"main.c", line 1385.25: 1506-046 (S) Syntax error.
make[2]: *** [main.o] Error 1
make[2]: Leaving directory `/fsapps/test/build/flex/2.5.31/flex-2.5.31'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/fsapps/test/build/flex/2.5.31/flex-2.5.31'
make: *** [all] Error 2