Something

gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"unixODBC\" -DVERSION=\"2.2.11\" -DYYTEXT_POINTER=1 -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_SYS_SEM_H=1 -DHAVE_DLFCN_H=1 -DLTDL_SHLIB_EXT=\".so\" -DHAVE_ICONV=1 -DICONV_CONST= -DHAVE_LIBCRYPT=1 -DTIME_WITH_SYS_TIME=1 -DHAVE_SYS_TIME_H=1 -DSIZEOF_LONG=4 -DHAVE_LONG_LONG=1 -DHAVE_STRCASECMP=1 -DHAVE_STRNCASECMP=1 -DHAVE_VSNPRINTF=1 -DHAVE_STRTOL=1 -DHAVE_ATOLL=1 -DHAVE_STRTOLL=1 -DHAVE_ENDPWENT=1 -DHAVE_LIBPTHREAD=1 -D_REENTRANT=1 -DHAVE_LOCALTIME_R=1 -DHAVE_FTOK=1 -DHAVE_SEMGET=1 -DHAVE_SHMGET=1 -DHAVE_SEMOP=1 -DHAVE_SNPRINTF=1 -DNEED_SEMUNDO_UNION=1 -DCOLLECT_STATS=1 -DSTDC_HEADERS=1 -DHAVE_MALLOC_H=1 -DHAVE_UNISTD_H=1 -DHAVE_PWD_H=1 -DHAVE_CRYPT_H=1 -DHAVE_LIMITS_H=1 -DHAVE_STRINGS_H=1 -DHAVE_STRING_H=1 -DHAVE_LOCALE_H=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_SEM_H=1 -DHAVE_DIRENT_H=1 -DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 -DHAVE_VPRINTF=1 -DHAVE_PUTENV=1 -DHAVE_SOCKET=1 -DHAVE_STRDUP=1 -DHAVE_STRSTR=1 -DHAVE_SETENV=1 -DHAVE_SETLOCALE=1 -DHAVE_STRCHR=1 -DUNIXODBC_SOURCE=1 -I. -I. -I../include -g -O2 -pthread -c lex.c -MT lex.lo -MD -MP -MF .deps/lex.TPlo  -fPIC -DPIC -o lex.lo
lex.l: In function `yyerror':
lex.l:241: error: `YY_FLUSH_BUFFER' undeclared (first use in this function)
lex.l:241: error: (Each undeclared identifier is reported only once
lex.l:241: error: for each function it appears in.)
make[1]: *** [lex.lo] Error 1
make[1]: Leaving directory `/DEVEL/unixODBC-2.2.11/sqp'
make: *** [all-recursive] Error 1