* C-compiler features
@ 2008-02-11 8:03 H.Merijn Brand
2008-02-11 16:24 ` Daniel Barkalow
0 siblings, 1 reply; 2+ messages in thread
From: H.Merijn Brand @ 2008-02-11 8:03 UTC (permalink / raw)
To: Git Mailing List
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_MACROS
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...
<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)) = 8
Integer sizes...
sizeof(char) = 1
sizeof(short) = 2
sizeof(int) = 4
sizeof(long) = 8
sizeof(long long) = 8
Integer-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) = 4
C++ 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) = 1
Floating-point sizes...
sizeof(float) = 4
sizeof(double) = 8
sizeof(long double) = 16
Missing data types...
imaxdiv_t
lldiv_t
mbstate_t
nothrow_t
wctrans_t
_Complex
_Imaginary
fpathconf() 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) = -1
float 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) field
FEATURES 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)) = 4
Integer sizes...
sizeof(char) = 1
sizeof(short) = 2
sizeof(int) = 4
sizeof(long) = 4
sizeof(long long) = 8
Integer-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) = 4
C++ 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) = 1
Floating-point sizes...
sizeof(float) = 4
sizeof(double) = 8
sizeof(long double) = 16
Missing data types...
imaxdiv_t
lldiv_t
mbstate_t
nothrow_t
wctrans_t
_Complex
_Imaginary
fpathconf() 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) = -1
float 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) field
FEATURES 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/
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: C-compiler features
2008-02-11 8:03 C-compiler features H.Merijn Brand
@ 2008-02-11 16:24 ` Daniel Barkalow
0 siblings, 0 replies; 2+ messages in thread
From: Daniel Barkalow @ 2008-02-11 16:24 UTC (permalink / raw)
To: H.Merijn Brand; +Cc: Git Mailing List
On Mon, 11 Feb 2008, H.Merijn Brand wrote:
> 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
Hmm. I'm actually more curious about what language features a compiler
supports (Is "inline" a keyword? Does it accept C99 comments? C99 struct
initializers? Flex arrays?). Sometimes the errors you get when these
aren't what the code expects are hard to identify, because the compiler
comes up with some odd interpretation of the structure as what you meant
but messed up, and you get a slew of inappropriate error messages,
sometimes hiding the actual wrong thing. Missing header
files/types/macros/declarations generally give a clear first error
message.
-Daniel
*This .sig left intentionally blank*
^ permalink raw reply [flat|nested] 2+ messages in thread
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