C-compiler features
- From
H.Merijn Brand <h.m.brand@xs4all.nl>
- Date
- Feb 11, 2008, 08:03 UTC
- Message-ID
- <20080211090326.2d0c64cd@pc09.procura.nl>
Having to answer questions about my C-compiler isn't always that easy. Sometimes you need to find include files, for which you don't know if and if how they are used. Sometimes you need to compile test programs to see the behaviour, and then there is threads, 32/64 bitness etc.
I was recently pointed to http://www.math.utah.edu/pub/features/ Which gives a nice summary of what your C/C++ compiler behaves like. Here's the output for HP C-ANSI-C on HP-UX 11.23/64 IPF and on 11.00
======================================================================== HP-UX 11.23/64 U rx1620/64 Itanium 2/1600(2) ia64 2037 Mb B9007AA.C-ANSI-C C.06.15 HP C/aC++ Compiler
Compiler = cc
Available standard predefined constant macros...
__DATE__ = "Feb 11 2008"
__FILE__ = "features.c"
__LINE__ = 180
__STDC__ = 1
__STDC_VERSION__ = 199012
__TIME__ = "08:50:58"Missing standard predefined constant macros...
__bool_true_false_are_defined
__cplusplus
__func__
__STDC_HOSTED__
__STDC_IEC_559__
__STDC_IEC_559_COMPLEX__
__STDC_ISO_10646__
__STDC_CONSTANT_MACROS
__STDC_FORMAT_MACROS
__STDC_LIMIT_MACROSAvailable nonstandard but traditional header files...
<sys/types.h>
<varargs.h>Missing nonstandard but traditional header files...
Available 1989 Standard C header files...
<assert.h>
<ctype.h>
<errno.h>
<float.h>
<limits.h>
<locale.h>
<math.h>
<setjmp.h>
<signal.h>
<stdarg.h>
<stddef.h>
<stdio.h>
<stdlib.h>
<string.h>
<time.h>Missing 1989 Standard C standard header files...
Available additional 1999 Standard C header files...
<complex.h>
<fenv.h>
<inttypes.h>
<iso646.h>
<stdbool.h>
<stdint.h>
<tgmath.h>
<wchar.h>
<wctype.h>Missing additional 1999 Standard C standard header files...
Available additional POSIX (IEEE Std 1003.1-2001) header files...
<aio.h>
<arpa/inet.h>
<cpio.h>
<dirent.h>
<dlfcn.h>
<fcntl.h>
<fmtmsg.h>
<fnmatch.h>
<ftw.h>
<glob.h>
<grp.h>
<iconv.h>
<langinfo.h>
<libgen.h>
<monetary.h>
<mqueue.h>
<ndbm.h>
<net/if.h>
<netdb.h>
<netinet/in.h>
<netinet/tcp.h>
<nl_types.h>
<poll.h>
<pthread.h>
<pwd.h>
<regex.h>
<sched.h>
<search.h>
<semaphore.h>
<strings.h>
<stropts.h>
<sys/ipc.h>
<sys/mman.h>
<sys/msg.h>
<sys/resource.h>
<sys/select.h>
<sys/sem.h>
<sys/shm.h>
<sys/socket.h>
<sys/stat.h>
<sys/statvfs.h>
<sys/time.h>
<sys/timeb.h>
<sys/times.h>
<sys/types.h>
<sys/uio.h>
<sys/un.h>
<sys/utsname.h>
<sys/wait.h>
<syslog.h>
<tar.h>
<termios.h>
<ucontext.h>
<ulimit.h>
<unistd.h>
<utime.h>
<utmpx.h>
<wordexp.h>Missing additional POSIX (IEEE Std 1003.1-2001) header files...
<spawn.h>
<trace.h>Pointer sizes...
sizeof(char*) = 8
sizeof(void*) = 8
sizeof(void(*)(void)) = 8Integer sizes...
sizeof(char) = 1
sizeof(short) = 2
sizeof(int) = 4
sizeof(long) = 8
sizeof(long long) = 8Integer-like sizes...
sizeof(clock_t) = 4
sizeof(div_t) = 8
sizeof(fpos_t) = 8
sizeof(intmax_t) = 8
sizeof(ldiv_t) = 16
sizeof(off_t) = 8
sizeof(ptrdiff_t) = 8
sizeof(sig_atomic_t) = 4
sizeof(size_t) = 8
sizeof(time_t) = 8
sizeof(uintmax_t) = 8
sizeof(wchar_t) = 4C++ 1998 integer-like sizes...
C99 integer-like sizes...
sizeof(double_t) = 8
sizeof(fenv_t) = 8
sizeof(fexcept_t) = 4
sizeof(float_t) = 4
sizeof(int8_t) = 1
sizeof(int_fast16_t) = 4
sizeof(int_fast32_t) = 4
sizeof(int_fast64_t) = 8
sizeof(int_fast8_t) = 4
sizeof(int_least16_t) = 2
sizeof(int_least32_t) = 4
sizeof(int_least64_t) = 8
sizeof(int_least8_t) = 1
sizeof(intptr_t) = 8
sizeof(ssize_t) = 8
sizeof(uint_fast16_t) = 4
sizeof(uint_fast32_t) = 4
sizeof(uint_fast64_t) = 8
sizeof(uint_fast8_t) = 4
sizeof(uint_least16_t) = 2
sizeof(uint_least32_t) = 4
sizeof(uint_least64_t) = 8
sizeof(uint_least8_t) = 1
sizeof(uintptr_t) = 8
sizeof(wchar_t) = 4
sizeof(wctype_t) = 4
sizeof(wint_t) = 4
sizeof(_Bool) = 1Floating-point sizes...
sizeof(float) = 4
sizeof(double) = 8
sizeof(long double) = 16Missing data types...
imaxdiv_t
lldiv_t
mbstate_t
nothrow_t
wctrans_t
_Complex
_Imaginaryfpathconf() and pathconf() tests...
pathconf("/", _PC_NAME_MAX) = 255
pathconf("/bin", _PC_NAME_MAX) = 255
pathconf("/etc", _PC_NAME_MAX) = 255
pathconf("/tmp", _PC_NAME_MAX) = 255
pathconf("/usr", _PC_NAME_MAX) = 255
pathconf("/var", _PC_NAME_MAX) = 255
pathconf("./", _PC_NAME_MAX) = 255
fpathconf(fileno(stdin), _PC_NAME_MAX) = -1
fpathconf(fileno(stdout), _PC_NAME_MAX) = -1
fpathconf(fileno(stderr), _PC_NAME_MAX) = -1 pathconf("/", _PC_PATH_MAX) = 1023
pathconf("/bin", _PC_PATH_MAX) = 1023
pathconf("/etc", _PC_PATH_MAX) = 1023
pathconf("/tmp", _PC_PATH_MAX) = 1023
pathconf("/usr", _PC_PATH_MAX) = 1023
pathconf("/var", _PC_PATH_MAX) = 1023
pathconf("./", _PC_PATH_MAX) = 1023
fpathconf(fileno(stdin), _PC_PATH_MAX) = -1
fpathconf(fileno(stdout), _PC_PATH_MAX) = -1
fpathconf(fileno(stderr), _PC_PATH_MAX) = -1float limits:
smallest floating-point number: 1.40129846e-45 == 2^(-149) [IEEE 754 smallest 32-bit subnormal]
machine epsilon: 1.19209290e-07 == 2^(-23) [IEEE 754 32-bit conformant]double limits:
smallest floating-point number: 4.94065646e-324 == 2^(-1074) [IEEE 754 smallest 64-bit subnormal]
machine epsilon: 2.22044605e-16 == 2^(-52) [IEEE 754 64-bit conformant]long double limits:
smallest floating-point number: 0.00000000e+00 == 2^(-16494) [IEEE 754 smallest 128-bit subnormal]
machine epsilon: 1.92592994e-34 == 2^(-112) [IEEE 754 128-bit conformant]
long double appears to be 128-bit value stored in 128-bit (16-byte) fieldFEATURES TESTS COMPLETED
======================================================================== HP-UX 11.00/64 U A500-7X/64 PA8700/750(2) pa-2.0 2048 Mb B3901BA.C-ANSI-C B.11.11.10 HP C/ANSI C Compiler
Compiler = cc
Available standard predefined constant macros...
__bool_true_false_are_defined = 1
__DATE__ = "Feb 11 2008"
__FILE__ = "features.c"
__LINE__ = 180
__STDC__ = 1
__TIME__ = "09:01:55"Missing standard predefined constant macros...
__cplusplus
__func__
__STDC_HOSTED__
__STDC_IEC_559__
__STDC_IEC_559_COMPLEX__
__STDC_ISO_10646__
__STDC_CONSTANT_MACROS
__STDC_FORMAT_MACROS
__STDC_LIMIT_MACROS
__STDC_VERSION__Available nonstandard but traditional header files...
<sys/types.h>
<varargs.h>Missing nonstandard but traditional header files...
Available 1989 Standard C header files...
<assert.h>
<ctype.h>
<errno.h>
<float.h>
<limits.h>
<locale.h>
<math.h>
<setjmp.h>
<signal.h>
<stdarg.h>
<stddef.h>
<stdio.h>
<stdlib.h>
<string.h>
<time.h>Missing 1989 Standard C standard header files...
Available additional 1999 Standard C header files...
<fenv.h>
<inttypes.h>
<stdbool.h>
<wchar.h>Missing additional 1999 Standard C standard header files...
<complex.h>
<iso646.h>
<stdint.h>
<tgmath.h>
<wctype.h>Available additional POSIX (IEEE Std 1003.1-2001) header files...
<aio.h>
<arpa/inet.h>
<cpio.h>
<dirent.h>
<dlfcn.h>
<fcntl.h>
<fmtmsg.h>
<fnmatch.h>
<ftw.h>
<glob.h>
<grp.h>
<iconv.h>
<langinfo.h>
<libgen.h>
<monetary.h>
<mqueue.h>
<ndbm.h>
<net/if.h>
<netdb.h>
<netinet/in.h>
<netinet/tcp.h>
<nl_types.h>
<poll.h>
<pthread.h>
<pwd.h>
<regex.h>
<sched.h>
<search.h>
<semaphore.h>
<strings.h>
<stropts.h>
<sys/ipc.h>
<sys/mman.h>
<sys/msg.h>
<sys/resource.h>
<sys/sem.h>
<sys/shm.h>
<sys/socket.h>
<sys/stat.h>
<sys/statvfs.h>
<sys/time.h>
<sys/timeb.h>
<sys/times.h>
<sys/types.h>
<sys/uio.h>
<sys/un.h>
<sys/utsname.h>
<sys/wait.h>
<syslog.h>
<tar.h>
<termios.h>
<ucontext.h>
<ulimit.h>
<unistd.h>
<utime.h>
<utmpx.h>
<wordexp.h>Missing additional POSIX (IEEE Std 1003.1-2001) header files...
<spawn.h>
<sys/select.h>
<trace.h>Pointer sizes...
sizeof(char*) = 4
sizeof(void*) = 4
sizeof(void(*)(void)) = 4Integer sizes...
sizeof(char) = 1
sizeof(short) = 2
sizeof(int) = 4
sizeof(long) = 4
sizeof(long long) = 8Integer-like sizes...
sizeof(clock_t) = 4
sizeof(div_t) = 8
sizeof(fpos_t) = 4
sizeof(intmax_t) = 8
sizeof(ldiv_t) = 8
sizeof(off_t) = 4
sizeof(ptrdiff_t) = 4
sizeof(sig_atomic_t) = 4
sizeof(size_t) = 4
sizeof(time_t) = 4
sizeof(uintmax_t) = 8
sizeof(wchar_t) = 4C++ 1998 integer-like sizes...
C99 integer-like sizes...
sizeof(double_t) = 8
sizeof(fenv_t) = 4
sizeof(fexcept_t) = 4
sizeof(float_t) = 4
sizeof(int8_t) = 1
sizeof(int_fast16_t) = 4
sizeof(int_fast32_t) = 4
sizeof(int_fast64_t) = 8
sizeof(int_fast8_t) = 4
sizeof(int_least16_t) = 2
sizeof(int_least32_t) = 4
sizeof(int_least64_t) = 8
sizeof(int_least8_t) = 1
sizeof(intptr_t) = 4
sizeof(ssize_t) = 4
sizeof(uint_fast16_t) = 4
sizeof(uint_fast32_t) = 4
sizeof(uint_fast64_t) = 8
sizeof(uint_fast8_t) = 4
sizeof(uint_least16_t) = 2
sizeof(uint_least32_t) = 4
sizeof(uint_least64_t) = 8
sizeof(uint_least8_t) = 1
sizeof(uintptr_t) = 4
sizeof(wchar_t) = 4
sizeof(wctype_t) = 4
sizeof(wint_t) = 4
sizeof(_Bool) = 1Floating-point sizes...
sizeof(float) = 4
sizeof(double) = 8
sizeof(long double) = 16Missing data types...
imaxdiv_t
lldiv_t
mbstate_t
nothrow_t
wctrans_t
_Complex
_Imaginaryfpathconf() and pathconf() tests...
pathconf("/", _PC_NAME_MAX) = 255
pathconf("/bin", _PC_NAME_MAX) = 255
pathconf("/etc", _PC_NAME_MAX) = 255
pathconf("/tmp", _PC_NAME_MAX) = 255
pathconf("/usr", _PC_NAME_MAX) = 255
pathconf("/var", _PC_NAME_MAX) = 255
pathconf("./", _PC_NAME_MAX) = 255
fpathconf(fileno(stdin), _PC_NAME_MAX) = -1
fpathconf(fileno(stdout), _PC_NAME_MAX) = -1
fpathconf(fileno(stderr), _PC_NAME_MAX) = -1 pathconf("/", _PC_PATH_MAX) = 1023
pathconf("/bin", _PC_PATH_MAX) = 1023
pathconf("/etc", _PC_PATH_MAX) = 1023
pathconf("/tmp", _PC_PATH_MAX) = 1023
pathconf("/usr", _PC_PATH_MAX) = 1023
pathconf("/var", _PC_PATH_MAX) = 1023
pathconf("./", _PC_PATH_MAX) = 1023
fpathconf(fileno(stdin), _PC_PATH_MAX) = -1
fpathconf(fileno(stdout), _PC_PATH_MAX) = -1
fpathconf(fileno(stderr), _PC_PATH_MAX) = -1float limits:
smallest floating-point number: 1.40129846e-45 == 2^(-149) [IEEE 754 smallest 32-bit subnormal]
machine epsilon: 1.19209290e-07 == 2^(-23) [IEEE 754 32-bit conformant]double limits:
smallest floating-point number: 4.94065646e-324 == 2^(-1074) [IEEE 754 smallest 64-bit subnormal]
machine epsilon: 2.22044605e-16 == 2^(-52) [IEEE 754 64-bit conformant]long double limits:
smallest floating-point number: 0.00000000e+00 == 2^(-16494) [IEEE 754 smallest 128-bit subnormal]
machine epsilon: 1.92592994e-34 == 2^(-112) [IEEE 754 128-bit conformant]
long double appears to be 128-bit value stored in 128-bit (16-byte) fieldFEATURES TESTS COMPLETED
--
H.Merijn Brand Amsterdam Perl Mongers (http://amsterdam.pm.org/)
using & porting perl 5.6.2, 5.8.x, 5.10.x on HP-UX 10.20, 11.00, 11.11,
& 11.23, SuSE 10.1 & 10.2, AIX 5.2, and Cygwin. http://qa.perl.org
http://mirrors.develooper.com/hpux/ http://www.test-smoke.org
http://www.goldmark.org/jeff/stupid-disclaimers/