double-- or a long double when applicable. Usual values are
2, 4 and 8. The default is eight, for safety.
-ansi2knr (ansi2knr.U):
- This variable is set if the user needs to run ansi2knr.
- Currently, this is not supported, so we just abort.
-
aphostname (d_gethname.U):
This variable contains the command which can be used to compute the
host name. The command is fully qualified by its absolute path, to make
This variable conditionally defines HAS__FWALK if _fwalk() is
available to apply a function to all the file handles.
+d_accept4 (d_accept4.U):
+ This variable conditionally defines HAS_ACCEPT4 if accept4() is
+ available to accept socket connections.
+
d_access (d_access.U):
This variable conditionally defines HAS_ACCESS if the access() system
call is available to check for access permissions using real IDs.
setpgrp needs two arguments whereas USG one needs none.
See also d_setpgid for a POSIX interface.
+d_builtin_add_overflow (d_builtin_overflow.U):
+ This variable conditionally defines HAS_BUILTIN_ADD_OVERFLOW, which
+ indicates that the compiler supports __builtin_add_overflow(x,y,&z)
+ for safely adding x and y into z while checking for overflow.
+
d_builtin_choose_expr (d_builtin.U):
This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
indicates that the compiler supports __builtin_choose_expr(x,y,z).
__builtin_expect to provide the compiler with branch prediction
information.
+d_builtin_mul_overflow (d_builtin_overflow.U):
+ This variable conditionally defines HAS_BUILTIN_MUL_OVERFLOW, which
+ indicates that the compiler supports __builtin_mul_overflow(x,y,&z)
+ for safely multiplying x and y into z while checking for overflow.
+
+d_builtin_sub_overflow (d_builtin_overflow.U):
+ This variable conditionally defines HAS_BUILTIN_SUB_OVERFLOW, which
+ indicates that the compiler supports __builtin_sub_overflow(x,y,&z)
+ for safely subtracting y from x into z while checking for overflow.
+
d_c99_variadic_macros (d_c99_variadic.U):
This variable conditionally defines the HAS_C99_VARIADIC_MACROS
symbol, which indicates to the C program that C99 variadic macros
indicates to the C program that the cbrt() (cube root) function
is available.
-d_charvspr (d_vprintf.U):
- This variable conditionally defines CHARVSPRINTF if this system
- has vsprintf returning type (char*). The trend seems to be to
- declare it as "int vsprintf()".
-
d_chown (d_chown.U):
This variable conditionally defines the HAS_CHOWN symbol, which
indicates to the C program that the chown() routine is available.
This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
which indicates that the struct cmsghdr is supported.
-d_const (d_const.U):
- This variable conditionally defines the HASCONST symbol, which
- indicates to the C program that this C compiler knows about the
- const type.
-
d_copysign (d_copysign.U):
This variable conditionally defines the HAS_COPYSIGN symbol, which
indicates to the C program that the copysign() routine is available.
indicates to the C program that the cuserid() routine is available
to get character login names.
-d_dbl_dig (d_dbl_dig.U):
- This variable conditionally defines d_dbl_dig if this system's
- header files provide DBL_DIG, which is the number of significant
- digits in a double precision number.
-
d_dbminitproto (d_dbminitproto.U):
This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
which indicates to the C program that the system provides
which indicates that the double type has an infinity.
d_double_has_nan (longdblfio.U):
- This variable conditionally defines the symbol DOUBLE_HAS_INF
+ This variable conditionally defines the symbol DOUBLE_HAS_NAN
which indicates that the double type has a not-a-number.
d_double_has_negative_zero (longdblfio.U):
This variable conditionally defines HAS_DUP2 if dup2() is
available to duplicate file descriptors.
+d_dup3 (d_dup3.U):
+ This variable conditionally defines HAS_DUP3 if dup3() is
+ available to duplicate file descriptors.
+
d_duplocale (d_newlocale.U):
This variable conditionally defines the HAS_DUPLOCALE symbol, which
indicates to the C program that the duplocale() routine is available
This variable conditionally defines PERL_INC_VERSION_LIST.
It is set to undef when PERL_INC_VERSION_LIST is empty.
-d_index (d_strchr.U):
- This variable conditionally defines HAS_INDEX if index() and
- rindex() are available for string searching.
-
d_inetaton (d_inetaton.U):
This variable conditionally defines the HAS_INET_ATON symbol, which
indicates to the C program that the inet_aton() function is available
indicates to the C program that the llroundl() routine is available
to return the long long value nearest to x away from zero.
+d_localeconv_l (d_localeconv_l.U):
+ This variable conditionally defines the HAS_LOCALECONV_L symbol, which
+ indicates to the C program that the localeconv_l() routine is available.
+
d_localtime64 (d_timefuncs64.U):
This variable conditionally defines the HAS_LOCALTIME64 symbol, which
indicates to the C program that the localtime64 () routine is available.
indicates to the C program that the mblen() routine is available
to find the number of bytes in a multibye character.
+d_mbrlen (d_mbrlen.U):
+ This variable conditionally defines the HAS_MBRLEN symbol if the
+ mbrlen() routine is available to be used to get the length of
+ multi-byte character strings.
+
+d_mbrtowc (d_mbrtowc.U):
+ This variable conditionally defines the HAS_MBRTOWC symbol if the
+ mbrtowc() routine is available to be used to convert a multi-byte
+ character into a wide character.
+
d_mbstowcs (d_mbstowcs.U):
This variable conditionally defines the HAS_MBSTOWCS symbol, which
indicates to the C program that the mbstowcs() routine is available
This variable conditionally defines the HAS_MKFIFO symbol, which
indicates to the C program that the mkfifo() routine is available.
+d_mkostemp (d_mkostemp.U):
+ This variable conditionally defines HAS_MKOSTEMP if mkostemp() is
+ available to exclusively create and open a uniquely named (with a
+ suffix) temporary file.
+
d_mkstemp (d_mkstemp.U):
This variable conditionally defines the HAS_MKSTEMP symbol, which
indicates to the C program that the mkstemp() routine is available
This variable conditionally defines HAS_NAN if nan() is
available to generate NaN.
+d_nanosleep (d_nanosleep.U):
+ This variable conditionally defines HAS_NANOSLEEP
+ if nanosleep() is available to sleep with 1E-9 sec accuracy.
+
d_ndbm (i_ndbm.U):
This variable conditionally defines the HAS_NDBM symbol, which
indicates that both the ndbm.h include file and an appropriate ndbm
indicates to the C program that the pipe() routine is available
to create an inter-process channel.
+d_pipe2 (d_pipe2.U):
+ This variable conditionally defines the HAS_PIPE2 symbol, which
+ indicates to the C program that the pipe2() routine is available
+ to create an inter-process channel.
+
d_poll (d_poll.U):
This variable conditionally defines the HAS_POLL symbol, which
indicates to the C program that the poll() routine is available
This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
indicates to the C program that the socks5_init() routine is available.
-d_sprintf_returns_strlen (d_sprintf_len.U):
- This variable defines whether sprintf returns the length of the string
- (as per the ANSI spec). Some C libraries retain compatibility with
- pre-ANSI C and return a pointer to the passed in buffer; for these
- this variable will be undef.
-
d_sqrtl (d_sqrtl.U):
This variable conditionally defines the HAS_SQRTL symbol, which
indicates to the C program that the sqrtl() routine is available.
has a FILE structure declaring usable _ptr and _cnt fields (or
equivalent) in stdio.h.
-d_strchr (d_strchr.U):
- This variable conditionally defines HAS_STRCHR if strchr() and
- strrchr() are available for string searching.
-
d_strcoll (d_strcoll.U):
This variable conditionally defines HAS_STRCOLL if strcoll() is
available to compare strings using collating information.
-d_strerrm (d_strerror.U):
- This variable holds what Strerror is defined as to translate an error
- code condition into an error message string. It could be 'strerror'
- or a more complex macro emulating strerror with sys_errlist[], or the
- "unknown" string when both strerror and sys_errlist are missing.
-
-d_strerror (d_strerror.U):
- This variable conditionally defines HAS_STRERROR if strerror() is
- available to translate error numbers to strings.
-
d_strerror_l (d_strerror_l.U):
This variable conditionally defines the HAS_STRERROR_L symbol, which
indicates to the C program that the strerror_l() routine is available
This variable conditionally defines the HAS_STRLCPY symbol, which
indicates to the C program that the strlcpy () routine is available.
+d_strnlen (d_strnlen.U):
+ This variable conditionally defines the HAS_STRNLEN symbol, which
+ indicates to the C program that the strnlen () routine is available.
+
d_strtod (d_strtod.U):
This variable conditionally defines the HAS_STRTOD symbol, which
indicates to the C program that the strtod() routine is available
This variable conditionally defines the HAS_STRTOLD symbol, which
indicates to the C program that the strtold() routine is available.
+d_strtold_l (d_strtold_l.U):
+ This variable conditionally defines the HAS_STRTOLD_L symbol, which
+ indicates to the C program that the strtold_l() routine is available.
+
d_strtoll (d_strtoll.U):
This variable conditionally defines the HAS_STRTOLL symbol, which
indicates to the C program that the strtoll() routine is available.
indicates to the C program that the tgamma() routine is available
for the gamma function. See also d_lgamma.
+d_thread_safe_nl_langinfo_l (d_nl_langinfo_l.U):
+ This variable contains the eventual value of the
+ HAS_THREAD_SAFE_NL_LANGINFO_L symbol, which indicates if the
+ nl_langinfo_l() function exists and is thread-safe.
+
d_time (d_time.U):
This variable conditionally defines the HAS_TIME symbol, which indicates
that the time() routine exists. The time() routine is normally
Otherwise (on USG probably), it is enough to close the standard file
descriptors and do a setpgrp().
-d_vprintf (d_vprintf.U):
- This variable conditionally defines the HAS_VPRINTF symbol, which
- indicates to the C program that the vprintf() routine is available
- to printf with a pointer to an argument list.
-
d_vsnprintf (d_snprintf.U):
This variable conditionally defines the HAS_VSNPRINTF symbol, which
indicates to the C program that the vsnprintf () library function
This variable conditionally defines the I_ARPA_INET symbol,
and indicates whether a C program should include <arpa/inet.h>.
-i_assert (i_assert.U):
- This variable conditionally defines the I_ASSERT symbol, which
- indicates to the C program that <assert.h> exists and could be
- included.
-
i_bfd (i_bfd.U):
This variable conditionally defines the I_BFD symbol, and
indicates whether a C program can include <bfd.h>.
indicates to the C program that <fenv.h> exists and should
be included.
-i_float (i_float.U):
- This variable conditionally defines the I_FLOAT symbol, and indicates
- whether a C program may include <float.h> to get symbols like DBL_MAX
- or DBL_MIN, i.e. machine dependent floating point values.
-
i_fp (i_fp.U):
This variable conditionally defines the I_FP symbol, and indicates
whether a C program should include <fp.h>.
This variable conditionally defines the I_LIBUTIL symbol, and indicates
whether a C program should include <libutil.h>.
-i_limits (i_limits.U):
- This variable conditionally defines the I_LIMITS symbol, and indicates
- whether a C program may include <limits.h> to get symbols like WORD_BIT
- and friends.
-
i_locale (i_locale.U):
This variable conditionally defines the I_LOCALE symbol,
and indicates whether a C program should include <locale.h>.
This variable conditionally defines the I_MALLOCMALLOC symbol,
and indicates whether a C program should include <malloc/malloc.h>.
-i_math (i_math.U):
- This variable conditionally defines the I_MATH symbol, and indicates
- whether a C program may include <math.h>.
-
-i_memory (i_memory.U):
- This variable conditionally defines the I_MEMORY symbol, and indicates
- whether a C program should include <memory.h>.
-
i_mntent (i_mntent.U):
This variable conditionally defines the I_MNTENT symbol, and indicates
whether a C program should include <mntent.h>.
This variable conditionally defines the I_SOCKS symbol, and indicates
whether a C program should include <socks.h>.
-i_stdarg (i_varhdr.U):
- This variable conditionally defines the I_STDARG symbol, which
- indicates to the C program that <stdarg.h> exists and should
- be included.
-
i_stdbool (i_stdbool.U):
This variable conditionally defines the I_STDBOOL symbol, which
indicates to the C program that <stdbool.h> exists and should
be included.
-i_stddef (i_stddef.U):
- This variable conditionally defines the I_STDDEF symbol, which
- indicates to the C program that <stddef.h> exists and should
- be included.
-
i_stdint (i_stdint.U):
This variable conditionally defines the I_STDINT symbol, which
indicates to the C program that <stdint.h> exists and should
be included.
i_stdlib (i_stdlib.U):
- This variable conditionally defines the I_STDLIB symbol, which
- indicates to the C program that <stdlib.h> exists and should
- be included.
-
-i_string (i_string.U):
- This variable conditionally defines the I_STRING symbol, which
- indicates that <string.h> should be included rather than <strings.h>.
+ This variable unconditionally defines the I_STDLIB symbol.
i_sunmath (i_sunmath.U):
This variable conditionally defines the I_SUNMATH symbol, and indicates
and indicates whether a C program should include <syslog.h>.
i_sysmman (i_sysmman.U):
- This variable conditionally defines the I_SYS_MMAN symbol, and
- indicates whether a C program should include <sys/mman.h>.
+ This variable conditionally defines the I_SYS_MMAN symbol,
+ and indicates whether a C program should include <sys/mman.h>.
i_sysmode (i_sysmode.U):
This variable conditionally defines the I_SYSMODE symbol,
to be included.
i_time (i_time.U):
- This variable conditionally defines I_TIME, which indicates
+ This variable unconditionally defines I_TIME, which indicates
to the C program that it should include <time.h>.
i_unistd (i_unistd.U):
This variable conditionally defines the I_UTIME symbol, and indicates
whether a C program should include <utime.h>.
-i_values (i_values.U):
- This variable conditionally defines the I_VALUES symbol, and indicates
- whether a C program may include <values.h> to get symbols like MAXLONG
- and friends.
-
-i_varargs (i_varhdr.U):
- This variable conditionally defines I_VARARGS, which indicates
- to the C program that it should include <varargs.h>.
-
-i_varhdr (i_varhdr.U):
- Contains the name of the header to be included to get va_dcl definition.
- Typically one of varargs.h or stdarg.h.
-
i_vfork (i_vfork.U):
This variable conditionally defines the I_VFORK symbol, and indicates
whether a C program should include vfork.h.
+i_wchar (i_wchar.U):
+ This variable conditionally defines the I_WCHAR symbol,
+ that indicates whether a C program may include <wchar.h>.
+
i_xlocale (d_newlocale.U):
This symbol, if defined, indicates to the C program that it should
include <xlocale.h> to get uselocale() and its friends
of the symbolic link pointing to the absolute pathname of
the executing program.
-prototype (prototype.U):
- This variable holds the eventual value of CAN_PROTOTYPE, which
- indicates the C compiler can handle function prototypes.
-
ptrsize (ptrsize.U):
This variable contains the value of the PTRSIZE symbol, which
indicates to the C program how many bytes there are in a pointer.
or
shrpenv=''
See the main perl Makefile.SH for actual working usage.
+
Alternatively, we might be able to use a command line option such
as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
$archlibexp/CORE (Linux).
REENTRANT_PROTO_T_ABC macros of reentr.h if d_strerror_r
is defined.
-strings (i_string.U):
- This variable holds the full path of the string header that will be
- used. Typically /usr/include/string.h or /usr/include/strings.h.
-
submit (Loc.U):
This variable is defined but not used by Configure.
The value is the empty string and is not useful.
This variable contains the format string used for printing
a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
-vaproto (vaproto.U):
- This variable conditionally defines CAN_VAPROTO on systems supporting
- prototype declaration of functions with a variable number of
- arguments. See also prototype.
-
vendorarch (vendorarch.U):
This variable contains the value of the PERL_VENDORARCH symbol.
It may have a ~ on the front.
https://perl5.git.perl.org / perl5.git / blobdiff