This is Info file autoconf.info, produced by Makeinfo-1.55 from the
input file ./autoconf.texi.

START-INFO-DIR-ENTRY
* Autoconf: (autoconf).         Create source code configuration scripts.
END-INFO-DIR-ENTRY

   This file documents the GNU Autoconf package for creating scripts to
configure source code packages using templates and an `m4' macro
package.

   Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.

   Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

   Permission is granted to copy and distribute modified versions of
this manual under the conditions for verbatim copying, provided that
the entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

   Permission is granted to copy and distribute translations of this
manual into another language, under the above conditions for modified
versions, except that this permission notice may be stated in a
translation approved by the Foundation.


File: autoconf.info,  Node: Old Macro Names,  Next: Environment Variable Index,  Prev: History,  Up: Top

Old Macro Names
***************

   In version 2 of Autoconf, most of the macros were renamed to use a
more uniform and descriptive naming scheme.  Here are the old names of
the macros that were renamed, followed by the current names of those
macros.  Although the old names are still accepted by the `autoconf'
program for backward compatibility, the old names are considered
obsolete.  *Note Macro Names::, for a description of the new naming
scheme.

`AC_ALLOCA'
     `AC_FUNC_ALLOCA'

`AC_ARG_ARRAY'
     removed because of limited usefulness

`AC_CHAR_UNSIGNED'
     `AC_C_CHAR_UNSIGNED'

`AC_CONST'
     `AC_C_CONST'

`AC_CROSS_CHECK'
     `AC_C_CROSS'

`AC_ERROR'
     `AC_MSG_ERROR'

`AC_FIND_X'
     `AC_PATH_X'

`AC_FIND_XTRA'
     `AC_PATH_XTRA'

`AC_FUNC_CHECK'
     `AC_CHECK_FUNC'

`AC_GCC_TRADITIONAL'
     `AC_PROG_GCC_TRADITIONAL'

`AC_GETGROUPS_T'
     `AC_TYPE_GETGROUPS'

`AC_GETLOADAVG'
     `AC_FUNC_GETLOADAVG'

`AC_HAVE_FUNCS'
     `AC_CHECK_FUNCS'

`AC_HAVE_HEADERS'
     `AC_CHECK_HEADERS'

`AC_HAVE_POUNDBANG'
     `AC_SYS_INTERPRETER' (different calling convention)

`AC_HEADER_CHECK'
     `AC_CHECK_HEADER'

`AC_HEADER_EGREP'
     `AC_EGREP_HEADER'

`AC_INLINE'
     `AC_C_INLINE'

`AC_LN_S'
     `AC_PROG_LN_S'

`AC_LONG_DOUBLE'
     `AC_C_LONG_DOUBLE'

`AC_LONG_FILE_NAMES'
     `AC_SYS_LONG_FILE_NAMES'

`AC_MAJOR_HEADER'
     `AC_HEADER_MAJOR'

`AC_MINUS_C_MINUS_O'
     `AC_PROG_CC_C_O'

`AC_MMAP'
     `AC_FUNC_MMAP'

`AC_MODE_T'
     `AC_TYPE_MODE_T'

`AC_OFF_T'
     `AC_TYPE_OFF_T'

`AC_PID_T'
     `AC_TYPE_PID_T'

`AC_PREFIX'
     `AC_PREFIX_PROGRAM'

`AC_PROGRAMS_CHECK'
     `AC_CHECK_PROGS'

`AC_PROGRAMS_PATH'
     `AC_PATH_PROGS'

`AC_PROGRAM_CHECK'
     `AC_CHECK_PROG'

`AC_PROGRAM_EGREP'
     `AC_EGREP_CPP'

`AC_PROGRAM_PATH'
     `AC_PATH_PROG'

`AC_REMOTE_TAPE'
     removed because of limited usefulness

`AC_RESTARTABLE_SYSCALLS'
     `AC_SYS_RESTARTABLE_SYSCALLS'

`AC_RETSIGTYPE'
     `AC_TYPE_SIGNAL'

`AC_RSH'
     removed because of limited usefulness

`AC_SETVBUF_REVERSED'
     `AC_FUNC_SETVBUF_REVERSED'

`AC_SET_MAKE'
     `AC_PROG_MAKE_SET'

`AC_SIZEOF_TYPE'
     `AC_CHECK_SIZEOF'

`AC_SIZE_T'
     `AC_TYPE_SIZE_T'

`AC_STAT_MACROS_BROKEN'
     `AC_HEADER_STAT'

`AC_STDC_HEADERS'
     `AC_HEADER_STDC'

`AC_STRCOLL'
     `AC_FUNC_STRCOLL'

`AC_ST_BLKSIZE'
     `AC_STRUCT_ST_BLKSIZE'

`AC_ST_BLOCKS'
     `AC_STRUCT_ST_BLOCKS'

`AC_ST_RDEV'
     `AC_STRUCT_ST_RDEV'

`AC_SYS_SIGLIST_DECLARED'
     `AC_DECL_SYS_SIGLIST'

`AC_TEST_CPP'
     `AC_TRY_CPP'

`AC_TEST_PROGRAM'
     `AC_TRY_RUN'

`AC_TIMEZONE'
     `AC_STRUCT_TIMEZONE'

`AC_TIME_WITH_SYS_TIME'
     `AC_HEADER_TIME'

`AC_UID_T'
     `AC_TYPE_UID_T'

`AC_UTIME_NULL'
     `AC_FUNC_UTIME_NULL'

`AC_VFORK'
     `AC_FUNC_VFORK'

`AC_VPRINTF'
     `AC_FUNC_VPRINTF'

`AC_WAIT3'
     `AC_FUNC_WAIT3'

`AC_WARN'
     `AC_MSG_WARN'

`AC_WORDS_BIGENDIAN'
     `AC_C_BIGENDIAN'

`AC_YYTEXT_POINTER'
     `AC_DECL_YYTEXT'


File: autoconf.info,  Node: Environment Variable Index,  Next: Output Variable Index,  Prev: Old Macro Names,  Up: Top

Environment Variable Index
**************************

   This is an alphabetical list of the environment variables that
Autoconf checks.

* Menu:

* AC_MACRODIR:                          Invoking autoupdate.
* AC_MACRODIR:                          Invoking autoscan.
* AC_MACRODIR:                          Invoking autoreconf.
* AC_MACRODIR:                          Invoking ifnames.
* AC_MACRODIR:                          Invoking autoheader.
* AC_MACRODIR:                          Invoking autoconf.
* CONFIG_FILES:                         Invoking config.status.
* CONFIG_HEADERS:                       Invoking config.status.
* CONFIG_SHELL:                         Invoking config.status.
* CONFIG_SITE:                          Site Defaults.
* CONFIG_STATUS:                        Invoking config.status.
* SIMPLE_BACKUP_SUFFIX:                 Invoking autoupdate.


File: autoconf.info,  Node: Output Variable Index,  Next: Preprocessor Symbol Index,  Prev: Environment Variable Index,  Up: Top

Output Variable Index
*********************

   This is an alphabetical list of the variables that Autoconf can
substitute into files that it creates, typically one or more
`Makefile's.  *Note Setting Output Variables::, for more information on
how this is done.

* Menu:

* ALLOCA:                               Particular Functions.
* AWK:                                  Particular Programs.
* build:                                System Type Variables.
* build_alias:                          System Type Variables.
* build_cpu:                            System Type Variables.
* build_os:                             System Type Variables.
* build_vendor:                         System Type Variables.
* CC:                                   Particular Programs.
* CC:                                   UNIX Variants.
* CC:                                   Particular Programs.
* CFLAGS:                               Preset Output Variables.
* CFLAGS:                               Particular Programs.
* configure_input:                      Preset Output Variables.
* CPP:                                  Particular Programs.
* CPPFLAGS:                             Preset Output Variables.
* CXX:                                  Particular Programs.
* CXXCPP:                               Particular Programs.
* CXXFLAGS:                             Preset Output Variables.
* CXXFLAGS:                             Particular Programs.
* DEFS:                                 Preset Output Variables.
* exec_prefix:                          Preset Output Variables.
* host:                                 System Type Variables.
* host_alias:                           System Type Variables.
* host_cpu:                             System Type Variables.
* host_os:                              System Type Variables.
* host_vendor:                          System Type Variables.
* INSTALL:                              Particular Programs.
* INSTALL_DATA:                         Particular Programs.
* INSTALL_PROGRAM:                      Particular Programs.
* KMEM_GROUP:                           Particular Functions.
* LDFLAGS:                              Preset Output Variables.
* LEX:                                  Particular Programs.
* LEXLIB:                               Particular Programs.
* LEX_OUTPUT_ROOT:                      Particular Programs.
* LIBOBJS:                              Particular Functions.
* LIBOBJS:                              Particular Functions.
* LIBOBJS:                              Generic Functions.
* LIBOBJS:                              Structures.
* LIBS:                                 UNIX Variants.
* LIBS:                                 UNIX Variants.
* LIBS:                                 Preset Output Variables.
* LN_S:                                 Particular Programs.
* NEED_SETGID:                          Particular Functions.
* prefix:                               Preset Output Variables.
* program_transform_name:               Transforming Names.
* RANLIB:                               Particular Programs.
* SET_MAKE:                             Output.
* srcdir:                               Preset Output Variables.
* subdirs:                              Subdirectories.
* target:                               System Type Variables.
* target_alias:                         System Type Variables.
* target_cpu:                           System Type Variables.
* target_os:                            System Type Variables.
* target_vendor:                        System Type Variables.
* top_srcdir:                           Preset Output Variables.
* X_CFLAGS:                             System Services.
* X_EXTRA_LIBS:                         System Services.
* X_LIBS:                               System Services.
* X_PRE_LIBS:                           System Services.
* YACC:                                 Particular Programs.


File: autoconf.info,  Node: Preprocessor Symbol Index,  Next: Macro Index,  Prev: Output Variable Index,  Up: Top

Preprocessor Symbol Index
*************************

   This is an alphabetical list of the C preprocessor symbols that the
Autoconf macros define.  To work with Autoconf, C source code needs to
use these names in `#if' directives.

* Menu:

* CLOSEDIR_VOID:                        Particular Functions.
* const:                                Compiler Characteristics.
* C_ALLOCA:                             Particular Functions.
* DGUX:                                 Particular Functions.
* DIRENT:                               Particular Headers.
* GETGROUPS_T:                          Particular Typedefs.
* GETLODAVG_PRIVILEGED:                 Particular Functions.
* gid_t:                                Particular Typedefs.
* HAVE_FUNCTION:                        Generic Functions.
* HAVE_HEADER:                          Generic Headers.
* HAVE_ALLOCA_H:                        Particular Functions.
* HAVE_CONFIG_H:                        Configuration Headers.
* HAVE_DIRENT_H:                        Particular Headers.
* HAVE_DOPRNT:                          Particular Functions.
* HAVE_GETMNTENT:                       Particular Functions.
* HAVE_LONG_DOUBLE:                     Compiler Characteristics.
* HAVE_LONG_FILE_NAMES:                 System Services.
* HAVE_MMAP:                            Particular Functions.
* HAVE_NDIR_H:                          Particular Headers.
* HAVE_RESTARTABLE_SYSCALLS:            System Services.
* HAVE_STRCOLL:                         Particular Functions.
* HAVE_STRFTIME:                        Particular Functions.
* HAVE_ST_BLKSIZE:                      Structures.
* HAVE_ST_BLOCKS:                       Structures.
* HAVE_ST_RDEV:                         Structures.
* HAVE_SYS_DIR_H:                       Particular Headers.
* HAVE_SYS_NDIR_H:                      Particular Headers.
* HAVE_SYS_WAIT_H:                      Particular Headers.
* HAVE_TM_ZONE:                         Structures.
* HAVE_TZNAME:                          Structures.
* HAVE_UNISTD_H:                        Particular Headers.
* HAVE_UTIME_NULL:                      Particular Functions.
* HAVE_VFORK_H:                         Particular Functions.
* HAVE_VPRINTF:                         Particular Functions.
* HAVE_WAIT3:                           Particular Functions.
* inline:                               Compiler Characteristics.
* INT_16_BITS:                          Compiler Characteristics.
* LONG_64_BITS:                         Compiler Characteristics.
* MAJOR_IN_MKDEV:                       Particular Headers.
* MAJOR_IN_SYSMACROS:                   Particular Headers.
* mode_t:                               Particular Typedefs.
* NDIR:                                 Particular Headers.
* NEED_MEMORY_H:                        Particular Headers.
* NEED_SETGID:                          Particular Functions.
* NLIST_NAME_UNION:                     Particular Functions.
* NLIST_STRUCT:                         Particular Functions.
* NO_MINUS_C_MINUS_O:                   Particular Programs.
* off_t:                                Particular Typedefs.
* pid_t:                                Particular Typedefs.
* RETSIGTYPE:                           Particular Typedefs.
* SETVBUF_REVERSED:                     Particular Functions.
* size_t:                               Particular Typedefs.
* STDC_HEADERS:                         Particular Headers.
* SVR4:                                 Particular Functions.
* SYSDIR:                               Particular Headers.
* SYSNDIR:                              Particular Headers.
* SYS_SIGLIST_DECLARED:                 Particular Headers.
* TIME_WITH_SYS_TIME:                   Structures.
* TM_IN_SYS_TIME:                       Structures.
* uid_t:                                Particular Typedefs.
* UMAX:                                 Particular Functions.
* UMAX4_3:                              Particular Functions.
* USG:                                  Particular Headers.
* vfork:                                Particular Functions.
* VOID_CLOSEDIR:                        Particular Headers.
* WORDS_BIGENDIAN:                      Compiler Characteristics.
* YYTEXT_POINTER:                       Particular Programs.
* _ALL_SOURCE:                          UNIX Variants.
* _MINIX:                               UNIX Variants.
* _POSIX_1_SOURCE:                      UNIX Variants.
* _POSIX_SOURCE:                        UNIX Variants.
* _POSIX_SOURCE:                        UNIX Variants.
* _POSIX_VERSION:                       Particular Headers.
* __CHAR_UNSIGNED__:                    Compiler Characteristics.


File: autoconf.info,  Node: Macro Index,  Prev: Preprocessor Symbol Index,  Up: Top

Macro Index
***********

   This is an alphabetical list of the Autoconf macros.  To make the
list easier to use, the macros are listed without their preceding `AC_'.

* Menu:

* AIX:                                  UNIX Variants.
* ALLOCA:                               Old Macro Names.
* ARG_ARRAY:                            Old Macro Names.
* ARG_ENABLE:                           Package Options.
* ARG_PROGRAM:                          Transforming Names.
* ARG_WITH:                             External Software.
* BEFORE:                               Suggested Ordering.
* CACHE_VAL:                            Caching Results.
* CANONICAL_HOST:                       Canonicalizing.
* CANONICAL_SYSTEM:                     Canonicalizing.
* CHAR_UNSIGNED:                        Old Macro Names.
* CHECKING:                             Printing Messages.
* CHECK_FUNC:                           Generic Functions.
* CHECK_FUNCS:                          Generic Functions.
* CHECK_HEADER:                         Generic Headers.
* CHECK_HEADERS:                        Generic Headers.
* CHECK_LIB:                            Libraries.
* CHECK_PROG:                           Generic Programs.
* CHECK_PROGS:                          Generic Programs.
* CHECK_SIZEOF:                         Compiler Characteristics.
* CHECK_TYPE:                           Generic Typedefs.
* COMPILE_CHECK:                        Examining Libraries.
* CONFIG_AUX_DIR:                       Input.
* CONFIG_HEADER:                        Configuration Headers.
* CONFIG_SUBDIRS:                       Subdirectories.
* CONST:                                Old Macro Names.
* CROSS_CHECK:                          Old Macro Names.
* C_BIGENDIAN:                          Compiler Characteristics.
* C_CHAR_UNSIGNED:                      Compiler Characteristics.
* C_CONST:                              Compiler Characteristics.
* C_CROSS:                              Test Programs.
* C_INLINE:                             Compiler Characteristics.
* C_LONG_DOUBLE:                        Compiler Characteristics.
* DECL_SYS_SIGLIST:                     Particular Headers.
* DECL_YYTEXT:                          Particular Programs.
* DEFINE:                               Defining Symbols.
* DEFINE_UNQUOTED:                      Defining Symbols.
* DEFUN:                                Macro Definitions.
* DIR_HEADER:                           Particular Headers.
* DYNIX_SEQ:                            UNIX Variants.
* EGREP_CPP:                            Examining Declarations.
* EGREP_HEADER:                         Examining Declarations.
* ENABLE:                               Package Options.
* ERROR:                                Old Macro Names.
* FIND_X:                               Old Macro Names.
* FIND_XTRA:                            Old Macro Names.
* FUNC_ALLOCA:                          Particular Functions.
* FUNC_CHECK:                           Old Macro Names.
* FUNC_CLOSEDIR_VOID:                   Particular Functions.
* FUNC_GETLOADAVG:                      Particular Functions.
* FUNC_GETMNTENT:                       Particular Functions.
* FUNC_MEMCMP:                          Particular Functions.
* FUNC_MMAP:                            Particular Functions.
* FUNC_SETVBUF_REVERSED:                Particular Functions.
* FUNC_STRCOLL:                         Particular Functions.
* FUNC_STRFTIME:                        Particular Functions.
* FUNC_UTIME_NULL:                      Particular Functions.
* FUNC_VFORK:                           Particular Functions.
* FUNC_VPRINTF:                         Particular Functions.
* FUNC_WAIT3:                           Particular Functions.
* GCC_TRADITIONAL:                      Old Macro Names.
* GETGROUPS_T:                          Old Macro Names.
* GETLOADAVG:                           Old Macro Names.
* HAVE_FUNCS:                           Old Macro Names.
* HAVE_HEADERS:                         Old Macro Names.
* HAVE_LIBRARY:                         Libraries.
* HAVE_POUNDBANG:                       Old Macro Names.
* HEADER_CHECK:                         Old Macro Names.
* HEADER_DIRENT:                        Particular Headers.
* HEADER_EGREP:                         Old Macro Names.
* HEADER_MAJOR:                         Particular Headers.
* HEADER_STAT:                          Structures.
* HEADER_STDC:                          Particular Headers.
* HEADER_SYS_WAIT:                      Particular Headers.
* HEADER_TIME:                          Structures.
* INIT:                                 Input.
* INLINE:                               Old Macro Names.
* INT_16_BITS:                          Compiler Characteristics.
* IRIX_SUN:                             UNIX Variants.
* ISC_POSIX:                            UNIX Variants.
* LANG_C:                               Language Choice.
* LANG_CPLUSPLUS:                       Language Choice.
* LANG_RESTORE:                         Language Choice.
* LANG_SAVE:                            Language Choice.
* LINK_FILES:                           Using System Type.
* LN_S:                                 Old Macro Names.
* LONG_64_BITS:                         Compiler Characteristics.
* LONG_DOUBLE:                          Old Macro Names.
* LONG_FILE_NAMES:                      Old Macro Names.
* MAJOR_HEADER:                         Old Macro Names.
* MEMORY_H:                             Particular Headers.
* MINIX:                                UNIX Variants.
* MINUS_C_MINUS_O:                      Old Macro Names.
* MMAP:                                 Old Macro Names.
* MODE_T:                               Old Macro Names.
* MSG_CHECKING:                         Printing Messages.
* MSG_ERROR:                            Printing Messages.
* MSG_RESULT:                           Printing Messages.
* MSG_WARN:                             Printing Messages.
* OBSOLETE:                             Obsolete Macros.
* OFF_T:                                Old Macro Names.
* OUTPUT:                               Output.
* PATH_PROG:                            Generic Programs.
* PATH_PROGS:                           Generic Programs.
* PATH_X:                               System Services.
* PATH_XTRA:                            System Services.
* PID_T:                                Old Macro Names.
* PREFIX:                               Old Macro Names.
* PREFIX_PROGRAM:                       Default Prefix.
* PREREQ:                               Versions.
* PROGRAMS_CHECK:                       Old Macro Names.
* PROGRAMS_PATH:                        Old Macro Names.
* PROGRAM_CHECK:                        Old Macro Names.
* PROGRAM_EGREP:                        Old Macro Names.
* PROGRAM_PATH:                         Old Macro Names.
* PROG_AWK:                             Particular Programs.
* PROG_CC:                              Particular Programs.
* PROG_CC_C_O:                          Particular Programs.
* PROG_CPP:                             Particular Programs.
* PROG_CXX:                             Particular Programs.
* PROG_CXXCPP:                          Particular Programs.
* PROG_GCC_TRADITIONAL:                 Particular Programs.
* PROG_INSTALL:                         Particular Programs.
* PROG_LEX:                             Particular Programs.
* PROG_LN_S:                            Particular Programs.
* PROG_MAKE_SET:                        Output.
* PROG_RANLIB:                          Particular Programs.
* PROG_YACC:                            Particular Programs.
* PROVIDE:                              Prerequisite Macros.
* REMOTE_TAPE:                          Old Macro Names.
* REPLACE_FUNCS:                        Generic Functions.
* REQUIRE:                              Prerequisite Macros.
* REQUIRE_CPP:                          Language Choice.
* RESTARTABLE_SYSCALLS:                 Old Macro Names.
* RETSIGTYPE:                           Old Macro Names.
* REVISION:                             Versions.
* RSH:                                  Old Macro Names.
* SCO_INTL:                             UNIX Variants.
* SETVBUF_REVERSED:                     Old Macro Names.
* SET_MAKE:                             Old Macro Names.
* SIZEOF_TYPE:                          Old Macro Names.
* SIZE_T:                               Old Macro Names.
* STAT_MACROS_BROKEN:                   Structures.
* STAT_MACROS_BROKEN:                   Old Macro Names.
* STDC_HEADERS:                         Old Macro Names.
* STRCOLL:                              Old Macro Names.
* STRUCT_ST_BLKSIZE:                    Structures.
* STRUCT_ST_BLOCKS:                     Structures.
* STRUCT_ST_RDEV:                       Structures.
* STRUCT_TIMEZONE:                      Structures.
* STRUCT_TM:                            Structures.
* ST_BLKSIZE:                           Old Macro Names.
* ST_BLOCKS:                            Old Macro Names.
* ST_RDEV:                              Old Macro Names.
* SUBST:                                Setting Output Variables.
* SUBST_FILE:                           Setting Output Variables.
* SYS_INTERPRETER:                      System Services.
* SYS_LONG_FILE_NAMES:                  System Services.
* SYS_RESTARTABLE_SYSCALLS:             System Services.
* SYS_SIGLIST_DECLARED:                 Old Macro Names.
* TEST_CPP:                             Old Macro Names.
* TEST_PROGRAM:                         Old Macro Names.
* TIMEZONE:                             Old Macro Names.
* TIME_WITH_SYS_TIME:                   Old Macro Names.
* TRY_COMPILE:                          Examining Syntax.
* TRY_CPP:                              Examining Declarations.
* TRY_LINK:                             Examining Libraries.
* TRY_RUN:                              Test Programs.
* TYPE_GETGROUPS:                       Particular Typedefs.
* TYPE_MODE_T:                          Particular Typedefs.
* TYPE_OFF_T:                           Particular Typedefs.
* TYPE_PID_T:                           Particular Typedefs.
* TYPE_SIGNAL:                          Particular Typedefs.
* TYPE_SIZE_T:                          Particular Typedefs.
* TYPE_UID_T:                           Particular Typedefs.
* UID_T:                                Old Macro Names.
* UNISTD_H:                             Particular Headers.
* USG:                                  Particular Headers.
* UTIME_NULL:                           Old Macro Names.
* VERBOSE:                              Printing Messages.
* VFORK:                                Old Macro Names.
* VPRINTF:                              Old Macro Names.
* WAIT3:                                Old Macro Names.
* WARN:                                 Old Macro Names.
* WITH:                                 External Software.
* WORDS_BIGENDIAN:                      Old Macro Names.
* XENIX_DIR:                            UNIX Variants.
* YYTEXT_POINTER:                       Old Macro Names.