Hello I am running this command : bash-3.2# ./configure checking build system type... powerpc-ibm-aix5.3.0.0 checking host system type... powerpc-ibm-aix5.3.0.0 checking target system type... powerpc-ibm-aix5.3.0.0 checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for g++... no checking for c++... no checking for gpp... no checking for aCC... no checking for CC... no checking for cxx... no checking for cc++... no checking for cl.exe... no checking for FCC... no checking for KCC... no checking for RCC... no checking for xlC_r... no checking for xlC... no checking whether we are using the GNU C++ compiler... no checking whether g++ accepts -g... no checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking whether gcc needs -traditional... no checking whether the linker is GNU ld... no checking whether gcc -E accepts -o... yes checking for ranlib... ranlib checking for ar... ar checking for as... as checking for objdump... no checking for gobjdump... no checking for objcopy... no checking for gobjcopy... no checking for nm... nm checking whether ln -s works... yes checking whether make sets $(MAKE)... yes checking for a BSD-compatible install... checking for a thread-safe mkdir -p... -d use 'mkdir -p' as MKDIR_P checking for dot... no checking for doxygen... no checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking minix/config.h usability... no checking minix/config.h presence... no checking for minix/config.h... no checking whether it is safe to define __EXTENSIONS__... yes checking for cd using phisical directory... cd -P checking whether -Wno-unused-parameter is accepted... yes checking whether -Wno-parentheses is accepted... yes checking whether -Wpointer-arith is accepted... yes checking whether -Wwrite-strings is accepted... yes checking whether -Wno-missing-field-initializers is accepted... yes checking whether -Wshorten-64-to-32 is accepted... no checking whether -Wno-long-long is accepted... yes checking whether -Wextra is accepted... yes checking whether -Wl,-unexported_symbol,_Init_* is accepted... no checking for special C compiler options needed for large files... no checking for _FILE_OFFSET_BITS value needed for large files... unknown checking for _LARGE_FILES value needed for large files... 1 checking for long long... yes checking for off_t... yes checking char bit... 8 checking size of int... 4 checking size of short... 2 checking size of long... 4 checking size of long long... 8 checking size of __int64... 0 checking size of off_t... 8 checking size of void*... 4 checking size of float... 4 checking size of double... 8 checking size of time_t... 4 checking for pid_t... yes checking for convertible type of pid_t... INT checking for uid_t... yes checking for convertible type of uid_t... UINT checking for gid_t... yes checking for convertible type of gid_t... UINT checking for time_t... yes checking for convertible type of time_t... INT checking for dev_t... yes checking for convertible type of dev_t... UINT checking for prototypes... yes checking token paste string... ansi checking stringization... #expr checking string literal concatenation... yes checking for variable length prototypes and stdarg.h... yes checking for variable length macro... yes checking for noreturn function attribute... __attribute__ ((noreturn)) x checking for deprecated function attribute... __attribute__ ((deprecated)) x checking for noinline function attribute... __attribute__ ((noinline)) x checking for stdcall function attribute... x checking for cdecl function attribute... x checking for fastcall function attribute... x checking for function alias... alias checking for RUBY_EXTERN... no checking whether sys_nerr is declared... yes checking for crypt in -lcrypt... no checking for dlopen in -ldl... no checking for shl_load in -ldld... no checking for socketpair in -lsocket... no checking for clock_gettime in -lrt... no checking for dirent.h that defines DIR... yes checking for library containing opendir... no checking for stdbool.h that conforms to C99... yes checking for _Bool... yes checking for sys/wait.h that is POSIX.1 compatible... yes checking limits.h usability... yes checking limits.h presence... yes checking for limits.h... yes checking sys/file.h usability... yes checking sys/file.h presence... yes checking for sys/file.h... yes checking sys/ioctl.h usability... yes checking sys/ioctl.h presence... yes checking for sys/ioctl.h... yes checking sys/syscall.h usability... no checking sys/syscall.h presence... no checking for sys/syscall.h... no checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking sys/fcntl.h usability... no checking sys/fcntl.h presence... no checking for sys/fcntl.h... no checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking sys/times.h usability... yes checking sys/times.h presence... yes checking for sys/times.h... yes checking sys/param.h usability... yes checking sys/param.h presence... yes checking for sys/param.h... yes checking syscall.h usability... no checking syscall.h presence... no checking for syscall.h... no checking pwd.h usability... yes checking pwd.h presence... yes checking for pwd.h... yes checking grp.h usability... yes checking grp.h presence... yes checking for grp.h... yes checking a.out.h usability... yes checking a.out.h presence... yes checking for a.out.h... yes checking utime.h usability... yes checking utime.h presence... yes checking for utime.h... yes checking direct.h usability... no checking direct.h presence... no checking for direct.h... no checking sys/resource.h usability... yes checking sys/resource.h presence... yes checking for sys/resource.h... yes checking sys/mkdev.h usability... no checking sys/mkdev.h presence... no checking for sys/mkdev.h... no checking sys/utime.h usability... no checking sys/utime.h presence... no checking for sys/utime.h... no checking xti.h usability... yes checking xti.h presence... yes checking for xti.h... yes checking netinet/in_systm.h usability... yes checking netinet/in_systm.h presence... yes checking for netinet/in_systm.h... yes checking float.h usability... yes checking float.h presence... yes checking for float.h... yes checking ieeefp.h usability... no checking ieeefp.h presence... no checking for ieeefp.h... no checking ucontext.h usability... yes checking ucontext.h presence... yes checking for ucontext.h... yes checking intrinsics.h usability... no checking intrinsics.h presence... no checking for intrinsics.h... no checking langinfo.h usability... yes checking langinfo.h presence... yes checking for langinfo.h... yes checking locale.h usability... yes checking locale.h presence... yes checking for locale.h... yes checking sys/sendfile.h usability... no checking sys/sendfile.h presence... no checking for sys/sendfile.h... no checking time.h usability... yes checking time.h presence... yes checking for time.h... yes checking for net/socket.h... (cached) no checking for sys/socket.h... (cached) yes checking size of rlim_t... 0 checking for size_t... yes checking size of size_t... configure: error: in `/test/ruby-1.9.2-p180': I am not sure ..what went wrong. Can you please guide me ..what I have missed ? Thank you. -- Posted via http://www.ruby-forum.com/.