130 lines
4.3 KiB
Plaintext
130 lines
4.3 KiB
Plaintext
# Copyright (c) 2000-2002 Sendmail, Inc. and its suppliers.
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# All rights reserved.
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#
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# By using this file, you agree to the terms and conditions set
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# forth in the LICENSE file which can be found at the top level of
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# the sendmail distribution.
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#
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# $Id: README,v 1.21 2002/01/23 17:30:48 gshapiro Exp $
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#
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Libsm is a library of generally useful C abstractions.
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For documentation, see index.html.
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Libsm stands alone; it depends on no other sendmail libraries,
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and the only sendmail header files it depends on are its own,
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which reside in ../include/sm.
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The t-*.c files are regression tests.
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These tests are incomplete: we do not yet test all of the APIs,
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and we have not yet converted all tests to use the test harness.
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If a test fails read the explanation it generates. Sometimes it
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is sufficient to change a compile time flag, which are also listed
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below. If that does not help, check the sendmail/README files for
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problems on your OS.
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The b-*.c files are benchmarks that compare system routines with
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those provided by libsm. By default sendmail uses the routines
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provided by the OS. In several cases, the routines provided by
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libsm are faster than those of the OS. If your OS provides the
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routines, you can compare the performance of them with the libsm
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versions by running the programs with the option -d (by default
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the programs just issue an explanation when/how to use them).
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The programs are:
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b-strcmp.c tests strcasecmp().
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+----------------------+
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| CONFIGURATION MACROS |
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+----------------------+
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Libsm uses a set of C preprocessor macros to specify platform specific
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features of the C compiler and standard C libraries.
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If you are porting sendmail to a new platform, you may need to tweak
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the values of some of these macros.
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The following macros are given default values in <sm/config.h>.
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If the default value is wrong for a given platform, then a platform
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specific value is specified in one of two ways:
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- A -D option is added to the confENVDEF macro; this change can be made
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to the platform M4 file in devtools/OS, or to the site.config.m4
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file in devtools/Site.
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- The confSM_OS_HEADER macro in the platform M4 file defines sm_os_foo,
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which forces "sm/os/sm_os_foo.h" to be included by "sm/config.h" via a
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link that is made from "sm_os.h" to "sm/os/sm_os_foo.h". Platform
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specific configuration macro settings are added to <sm/os/sm_os_foo.h>.
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SM_CONF_STDBOOL_H
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Set to 1 if the header file <stdbool.h> exists,
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and defines true, false and bool.
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SM_CONF_SYS_CDEFS_H
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Set to 1 if the header file <sys/cdefs.h> exists,
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and defines __P. You may need to do this to eliminate
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warnings about __P being multiply defined.
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SM_CONF_STDDEF_H
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Set to 0 if the header file <stddef.h> does not exist.
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SM_CONF_SETITIMER
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Set to 0 if the setitimer function is not available.
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SM_CONF_SYSEXITS_H
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Set to 1 if <sysexits.h> exists, and sets the EX_* macros
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to values different from the default BSD values in <sm/sysexits.h>.
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SM_CONF_UID_GID
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Set to 0 if <sys/types.h> does not define uid_t and gid_t.
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SM_CONF_SSIZE_T
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Set to 0 if <sys/types.h> does not define ssize_t.
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SM_CONF_BROKEN_SIZE_T
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Set to 1 if size_t is not unsigned.
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SM_CONF_LONGLONG
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Set to 1 if your C compiler supports the 'long long' type.
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This will be set automatically if you use gcc or a C compiler
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that conforms to the 1999 ISO C standard.
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SM_CONF_QUAD_T
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Set to 1 if your C compiler does not support 'long long',
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but <sys/types.h> defines quad_t as an integral type.
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SM_CONF_SHM
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Set to 1 if System V shared memory APIs are available.
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SM_CONF_MSG
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Set to 1 if System V message queues are available.
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SM_CONF_SEM
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Set to 1 if semaphores are available.
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SM_CONF_BROKEN_STRTOD
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Set to 1 if your strtod() does not work properly.
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SM_CONF_GETOPT
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Set to 1 if your operating system does not include getopt(3).
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SM_CONF_LDAP_MEMFREE
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Set to 1 if your LDAP client libraries include ldap_memfree(3).
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SM_IO_MAX_BUF_FILE
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Set this to a useful buffer size for regular files if stat(2)
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does not return a value for st_blksize that is the
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"optimal blocksize for I/O".
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SM_IO_MAX_BUF
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Set this to a useful maximum buffer size for other than
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regular files if stat(2) does not return a value for
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st_blksize that is the "optimal blocksize for I/O".
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SM_IO_MIN_BUF
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Set this to a useful minimum buffer size for other than
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regular files if stat(2) does not return a value for
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st_blksize that is the "optimal blocksize for I/O".
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