Several macros are obsoleted in Autoconf, for various reasons (typically they failed to quote properly, couldn't be extended for more recent issues etc.). They are still supported, but deprecated: their use should be avoided.
During the jump from Autoconf version 1 to version 2, most of the macros were renamed to use a more uniform and descriptive naming scheme, but their signature did not change. *Note Macro Names::, for a description of the new naming scheme. Below, if there is just the mapping from old names to new names for these macros, the reader is invited to refer to the definition of the new macro for the signature and the description.
- Macro: AC_ALLOCA `AC_FUNC_ALLOCA'
- Macro: AC_ARG_ARRAY removed because of limited usefulness
- Macro: AC_C_CROSS This macro is obsolete; it does nothing.
- Macro: AC_CANONICAL_SYSTEM Determine the system type and set output variables to the names of the canonical system types. *Note Canonicalizing::, for details about the variables this macro sets.
The user is encouraged to use either `AC_CANONICAL_BUILD', or `AC_CANONICAL_HOST', or `AC_CANONICAL_TARGET', depending on the needs. Using `AC_CANONICAL_TARGET' is enough to run the two other macros.
- Macro: AC_CHAR_UNSIGNED `AC_C_CHAR_UNSIGNED'
- Macro: AC_CHECK_TYPE (TYPE, DEFAULT) Autoconf, up to 2.13, used to provide this version of `AC_CHECK_TYPE', deprecated because of its flaws. Firstly, although it is a member of the `CHECK' clan, singular sub-family, it does more than just checking. Secondly, missing types are not `typedef''d, they are `#define''d, which can lead to incompatible code in the case of pointer types.
This use of `AC_CHECK_TYPE' is obsolete and discouraged; see *Note Generic Types::, for the description of the current macro.
If the type TYPE is not defined, define it to be the C (or C++) builtin type DEFAULT, e.g., `short' or `unsigned'.
This macro is equivalent to:
[Define to `DEFAULT' if
<sys/types.h> does not define.])])
In order to keep backward compatibility, the two versions of `AC_CHECK_TYPE' are implemented, selected by a simple heuristics:
1. If there are three or four arguments, the modern version is used.
2. If the second argument appears to be a C or C++ type, then the obsolete version is used. This happens if the argument is a C or C++ _builtin_ type or a C identifier ending in `_t', optionally followed by one of `[(* ' and then by a string of zero or more characters taken from the set `()* _a-zA-Z0-9'.
3. If the second argument is spelled with the alphabet of valid C and C++ types, the user is warned and the modern version is used.
4. Otherwise, the modern version is used.
You are encouraged either to use a valid builtin type, or to use the equivalent modern code (see above), or better yet, to use `AC_CHECK_TYPES' together with
#if !HAVE_LOFF_T typedef loff_t off_t; #endif
- Macro: AC_CHECKING (FEATURE-DESCRIPTION) Same as `AC_MSG_NOTICE([checking FEATURE-DESCRIPTION...]'.
- Macro: AC_COMPILE_CHECK (ECHO-TEXT, INCLUDES, FUNCTION-BODY, ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND]) This is an obsolete version of `AC_TRY_COMPILE' itself replaced by `AC_COMPILE_IFELSE' (*note Running the Compiler::), with the addition that it prints `checking for ECHO-TEXT' to the standard output first, if ECHO-TEXT is non-empty. Use `AC_MSG_CHECKING' and `AC_MSG_RESULT' instead to print messages (*note Printing Messages::).
- Macro: AC_CONST `AC_C_CONST'
- Macro: AC_CROSS_CHECK Same as `AC_C_CROSS', which is obsolete too, and does nothing `:-)'.
- Macro: AC_CYGWIN Check for the Cygwin environment in which case the shell variable `CYGWIN' is set to `yes'. Don't use this macro, the dignified means to check the nature of the host is using `AC_CANONICAL_HOST'. As a matter of fact this macro is defined as:
AC_REQUIRE([AC_CANONICAL_HOST])dnl case $host_os in *cygwin* ) CYGWIN=yes;; * ) CYGWIN=no;; esac
Beware that the variable `CYGWIN' has a very special meaning when running CygWin32, and should not be changed. That's yet another reason not to use this macro.
- Macro: AC_DECL_SYS_SIGLIST Same as:
AC_CHECK_DECLS([sys_siglist],,, [#include <signal.h> /* NetBSD declares sys_siglist in unistd.h. */ #if HAVE_UNISTD_H # include <unistd.h> #endif ])
- Macro: AC_DECL_YYTEXT Does nothing, now integrated in `AC_PROG_LEX'.
- Macro: AC_DIR_HEADER Like calling `AC_FUNC_CLOSEDIR_VOID' and`AC_HEADER_DIRENT', but defines a different set of C preprocessor macros to indicate which header file is found:
Header Old Symbol New Symbol `dirent.h' `DIRENT' `HAVE_DIRENT_H' `sys/ndir.h' `SYSNDIR' `HAVE_SYS_NDIR_H' `sys/dir.h' `SYSDIR' `HAVE_SYS_DIR_H' `ndir.h' `NDIR' `HAVE_NDIR_H'
- Macro: AC_DYNIX_SEQ If on DYNIX/ptx, add `-lseq' to output variable `LIBS'. This macro used to be defined as
AC_CHECK_LIB(seq, getmntent, LIBS="-lseq $LIBS")
now it is just `AC_FUNC_GETMNTENT'.
- Macro: AC_EXEEXT Defined the output variable `EXEEXT' based on the output of the compiler, which is now done automatically. Typically set to empty string if Unix and `.exe' if Win32 or OS/2.
- Macro: AC_EMXOS2 Similar to `AC_CYGWIN' but checks for the EMX environment on OS/2 and sets `EMXOS2'.
- Macro: AC_ERROR `AC_MSG_ERROR'
- Macro: AC_FIND_X `AC_PATH_X'
- Macro: AC_FIND_XTRA `AC_PATH_XTRA'
- Macro: AC_FUNC_CHECK `AC_CHECK_FUNC'
- Macro: AC_FUNC_WAIT3 If `wait3' is found and fills in the contents of its third argument (a `struct rusage *'), which HP-UX does not do, define `HAVE_WAIT3'.
These days portable programs should use `waitpid', not `wait3', as `wait3' is being removed from the Open Group standards, and will not appear in the next revision of POSIX.
- Macro: AC_GCC_TRADITIONAL `AC_PROG_GCC_TRADITIONAL'
- Macro: AC_GETGROUPS_T `AC_TYPE_GETGROUPS'
- Macro: AC_GETLOADAVG `AC_FUNC_GETLOADAVG'
- Macro: AC_HAVE_FUNCS `AC_CHECK_FUNCS'
- Macro: AC_HAVE_HEADERS `AC_CHECK_HEADERS'
- Macro: AC_HAVE_LIBRARY (LIBRARY, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [OTHER-LIBRARIES]) This macro is equivalent to calling `AC_CHECK_LIB' with a FUNCTION argument of `main'. In addition, LIBRARY can be written as any of `foo', `-lfoo', or `libfoo.a'. In all of those cases, the compiler is passed `-lfoo'. However, LIBRARY cannot be a shell variable; it must be a literal name.
- Macro: AC_HAVE_POUNDBANG `AC_SYS_INTERPRETER' (different calling convention)
- Macro: AC_HEADER_CHECK `AC_CHECK_HEADER'
- Macro: AC_HEADER_EGREP `AC_EGREP_HEADER'
- Macro: AC_HELP_STRING `AS_HELP_STRING'
- Macro: AC_INIT (UNIQUE-FILE-IN-SOURCE-DIR) Formerly `AC_INIT' used to have a single argument, and was equivalent to:
- Macro: AC_INLINE `AC_C_INLINE'
- Macro: AC_INT_16_BITS If the C type `int' is 16 bits wide, define `INT_16_BITS'. Use `AC_CHECK_SIZEOF(int)' instead.
- Macro: AC_IRIX_SUN If on IRIX (Silicon Graphics UNIX), add `-lsun' to output `LIBS'. If you were using it to get `getmntent', use `AC_FUNC_GETMNTENT' instead. If you used it for the NIS versions of the password and group functions, use `AC_CHECK_LIB(sun, getpwnam)'. Up to Autoconf 2.13, it used to be
AC_CHECK_LIB(sun, getmntent, LIBS="-lsun $LIBS")
now it is defined as
AC_FUNC_GETMNTENT AC_CHECK_LIB(sun, getpwnam)
- Macro: AC_LANG_C Same as `AC_LANG(C)'.
- Macro: AC_LANG_CPLUSPLUS Same as `AC_LANG(C++)'.
- Macro: AC_LANG_FORTRAN77 Same as `AC_LANG(Fortran 77)'.
- Macro: AC_LANG_RESTORE Select the LANGUAGE that is saved on the top of the stack, as set by `AC_LANG_SAVE', remove it from the stack, and call `AC_LANG(LANGUAGE)'.
- Macro: AC_LANG_SAVE Remember the current language (as set by `AC_LANG') on a stack. The current language does not change. `AC_LANG_PUSH' is preferred.
- Macro: AC_LINK_FILES (SOURCE..., DEST...) This is an obsolete version of `AC_CONFIG_LINKS'. An updated version of:
AC_LINK_FILES(config/$machine.h config/$obj_format.h, host.h object.h)
- Macro: AC_LN_S `AC_PROG_LN_S'
- Macro: AC_LONG_64_BITS Define `LONG_64_BITS' if the C type `long int' is 64 bits wide. Use the generic macro `AC_CHECK_SIZEOF([long int])' instead.
- Macro: AC_LONG_DOUBLE `AC_C_LONG_DOUBLE'
- Macro: AC_LONG_FILE_NAMES `AC_SYS_LONG_FILE_NAMES'
- Macro: AC_MAJOR_HEADER `AC_HEADER_MAJOR'
- Macro: AC_MEMORY_H Used to define `NEED_MEMORY_H' if the `mem' functions were defined in `memory.h'. Today it is equivalent to `AC_CHECK_HEADERS(memory.h)'. Adjust your code to depend upon `HAVE_MEMORY_H', not `NEED_MEMORY_H'; see *Note Standard Symbols::.
- Macro: AC_MINGW32 Similar to `AC_CYGWIN' but checks for the MingW32 compiler environment and sets `MINGW32'.
- Macro: AC_MINUS_C_MINUS_O `AC_PROG_CC_C_O'
- Macro: AC_MMAP `AC_FUNC_MMAP'
- Macro: AC_MODE_T `AC_TYPE_MODE_T'
- Macro: AC_OBJEXT Defined the output variable `OBJEXT' based on the output of the compiler, after .c files have been excluded. Typically set to `o' if Unix, `obj' if Win32. Now the compiler checking macros handle this automatically.
- Macro: AC_OBSOLETE (THIS-MACRO-NAME, [SUGGESTION]) Make M4 print a message to the standard error output warning that THIS-MACRO-NAME is obsolete, and giving the file and line number where it was called. THIS-MACRO-NAME should be the name of the macro that is calling `AC_OBSOLETE'. If SUGGESTION is given, it is printed at the end of the warning message; for example, it can be a suggestion for what to use instead of THIS-MACRO-NAME.
AC_OBSOLETE([$0], [; use AC_CHECK_HEADERS(unistd.h) instead])dnl
You are encouraged to use `AU_DEFUN' instead, since it gives better services to the user.
- Macro: AC_OFF_T `AC_TYPE_OFF_T'
- Macro: AC_OUTPUT ([FILE]..., [EXTRA-CMDS], [INIT-CMDS]) The use of `AC_OUTPUT' with argument is deprecated. This obsoleted interface is equivalent to:
AC_CONFIG_FILES(FILE...) AC_CONFIG_COMMANDS([default], EXTRA-CMDS, INIT-CMDS) AC_OUTPUT
- Macro: AC_OUTPUT_COMMANDS (EXTRA-CMDS, [INIT-CMDS]) Specify additional shell commands to run at the end of `config.status', and shell commands to initialize any variables from `configure'. This macro may be called multiple times. It is obsolete, replaced by `AC_CONFIG_COMMANDS'.
Here is an unrealistic example:
fubar=27 AC_OUTPUT_COMMANDS([echo this is extra $fubar, and so on.], [fubar=$fubar]) AC_OUTPUT_COMMANDS([echo this is another, extra, bit], [echo init bit])
Aside from the fact that `AC_CONFIG_COMMANDS' requires an additional key, an important difference is that `AC_OUTPUT_COMMANDS' is quoting its arguments twice, unlike `AC_CONFIG_COMMANDS'. This means that `AC_CONFIG_COMMANDS' can safely be given macro calls as arguments:
Conversely, where one level of quoting was enough for literal strings with `AC_OUTPUT_COMMANDS', you need two with `AC_CONFIG_COMMANDS'. The following lines are equivalent:
AC_OUTPUT_COMMANDS([echo "Square brackets: "]) AC_CONFIG_COMMANDS([default], [[echo "Square brackets: "]])
- Macro: AC_PID_T `AC_TYPE_PID_T'
- Macro: AC_PREFIX `AC_PREFIX_PROGRAM'
- Macro: AC_PROG_CC_STDC This macro has been integrated into `AC_PROG_CC'.
- Macro: AC_PROGRAMS_CHECK `AC_CHECK_PROGS'
- Macro: AC_PROGRAMS_PATH `AC_PATH_PROGS'
- Macro: AC_PROGRAM_CHECK `AC_CHECK_PROG'
- Macro: AC_PROGRAM_EGREP `AC_EGREP_CPP'
- Macro: AC_PROGRAM_PATH `AC_PATH_PROG'
- Macro: AC_REMOTE_TAPE removed because of limited usefulness
- Macro: AC_RESTARTABLE_SYSCALLS `AC_SYS_RESTARTABLE_SYSCALLS'
- Macro: AC_RETSIGTYPE `AC_TYPE_SIGNAL'
- Macro: AC_RSH removed because of limited usefulness
- Macro: AC_SCO_INTL If on SCO UNIX, add `-lintl' to output variable `LIBS'. This macro used to
AC_CHECK_LIB(intl, strftime, LIBS="-lintl $LIBS")
Now it just calls `AC_FUNC_STRFTIME' instead.
- Macro: AC_SETVBUF_REVERSED `AC_FUNC_SETVBUF_REVERSED'
- Macro: AC_SET_MAKE `AC_PROG_MAKE_SET'
- Macro: AC_SIZEOF_TYPE `AC_CHECK_SIZEOF'
- Macro: AC_SIZE_T `AC_TYPE_SIZE_T'
- Macro: AC_STAT_MACROS_BROKEN `AC_HEADER_STAT'
- Macro: AC_STDC_HEADERS `AC_HEADER_STDC'
- Macro: AC_STRCOLL `AC_FUNC_STRCOLL'
- Macro: AC_ST_BLKSIZE `AC_CHECK_MEMBERS'
- Macro: AC_ST_BLOCKS `AC_STRUCT_ST_BLOCKS'
- Macro: AC_ST_RDEV `AC_CHECK_MEMBERS'
- Macro: AC_SYS_RESTARTABLE_SYSCALLS If the system automatically restarts a system call that is interrupted by a signal, define `HAVE_RESTARTABLE_SYSCALLS'. This macro does not check if system calls are restarted in general-it tests whether a signal handler installed with `signal' (but not `sigaction') causes system calls to be restarted. It does not test if system calls can be restarted when interrupted by signals that have no handler.
These days portable programs should use `sigaction' with `SA_RESTART' if they want restartable system calls. They should not rely on `HAVE_RESTARTABLE_SYSCALLS', since nowadays whether a system call is restartable is a dynamic issue, not a configuration-time issue.
- Macro: AC_SYS_SIGLIST_DECLARED `AC_DECL_SYS_SIGLIST'
- Macro: AC_TEST_CPP `AC_TRY_CPP', replaced by `AC_PREPROC_IFELSE'.
- Macro: AC_TEST_PROGRAM `AC_TRY_RUN', replaced by `AC_RUN_IFELSE'.
- Macro: AC_TIMEZONE `AC_STRUCT_TIMEZONE'
- Macro: AC_TIME_WITH_SYS_TIME `AC_HEADER_TIME'
- Macro: AC_TRY_COMPILE (INCLUDES, FUNCTION-BODY, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) Same as `AC_COMPILE_IFELSE([AC_LANG_SOURCE([[INCLUDES]], [[FUNCTION-BODY]])], [ACTION-IF-TRUE], [ACTION-IF-FALSE])' (*note Running the Compiler::).
This macro double quotes both INCLUDES and FUNCTION-BODY.
For C and C++, INCLUDES is any `#include' statements needed by the code in FUNCTION-BODY (INCLUDES will be ignored if the currently selected language is Fortran or Fortran 77). The compiler and compilation flags are determined by the current language (*note Language Choice::).
- Macro: AC_TRY_CPP (INPUT, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) Same as `AC_PREPROC_IFELSE([AC_LANG_SOURCE([[INPUT]])], [ACTION-IF-TRUE], [ACTION-IF-FALSE])' (*note Running the Preprocessor::).
This macro double quotes the INPUT.
- Macro: AC_TRY_LINK (INCLUDES, FUNCTION-BODY, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) Same as `AC_LINK_IFELSE([AC_LANG_SOURCE([[INCLUDES]], [[FUNCTION-BODY]])], [ACTION-IF-TRUE], [ACTION-IF-FALSE])' (*note Running the Compiler::).
This macro double quotes both INCLUDES and FUNCTION-BODY.
Depending on the current language (*note Language Choice::), create a test program to see whether a function whose body consists of FUNCTION-BODY can be compiled and linked. If the file compiles and links successfully, run shell commands ACTION-IF-FOUND, otherwise run ACTION-IF-NOT-FOUND.
This macro double quotes both INCLUDES and FUNCTION-BODY.
For C and C++, INCLUDES is any `#include' statements needed by the code in FUNCTION-BODY (INCLUDES will be ignored if the currently selected language is Fortran or Fortran 77). The compiler and compilation flags are determined by the current language (*note Language Choice::), and in addition `LDFLAGS' and `LIBS' are used for linking.
- Macro: AC_TRY_LINK_FUNC (FUNCTION, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) This macro is equivalent to `AC_LINK_IFELSE([AC_LANG_CALL([[INCLUDES]], [[FUNCTION-BODY]])], [ACTION-IF-TRUE], [ACTION-IF-FALSE])'.
- Macro: AC_TRY_RUN (PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE], [ACTION-IF-CROSS-COMPILING]) Same as `AC_RUN_IFELSE([AC_LANG_SOURCE([[PROGRAM]], [ACTION-IF-TRUE], [ACTION-IF-FALSE], [ACTION-IF-CROSS-COMPILING])' (*note Run Time::).
- Macro: AC_UID_T `AC_TYPE_UID_T'
- Macro: AC_UNISTD_H Same as `AC_CHECK_HEADERS(unistd.h)'.
- Macro: AC_USG Define `USG' if the BSD string functions are defined in `strings.h'. You should no longer depend upon `USG', but on `HAVE_STRING_H'; see *Note Standard Symbols::.
- Macro: AC_UTIME_NULL `AC_FUNC_UTIME_NULL'
- Macro: AC_VALIDATE_CACHED_SYSTEM_TUPLE ([CMD]) If the cache file is inconsistent with the current host, target and build system types, it used to execute CMD or print a default error message. This is now handled by default.
- Macro: AC_VERBOSE (RESULT-DESCRIPTION) `AC_MSG_RESULT'.
- Macro: AC_VFORK `AC_FUNC_VFORK'
- Macro: AC_VPRINTF `AC_FUNC_VPRINTF'
- Macro: AC_WAIT3 `AC_FUNC_WAIT3'
- Macro: AC_WARN `AC_MSG_WARN'
- Macro: AC_WORDS_BIGENDIAN `AC_C_BIGENDIAN'
- Macro: AC_XENIX_DIR This macro used to add `-lx' to output variable `LIBS' if on Xenix. Also, if `dirent.h' is being checked for, added `-ldir' to `LIBS'. Now it is merely an alias of `AC_HEADER_DIRENT' instead, plus some code to detect whether running XENIX on which you should not depend:
AC_MSG_CHECKING([for Xenix]) AC_EGREP_CPP(yes, [#if defined M_XENIX && !defined M_UNIX yes #endif], [AC_MSG_RESULT([yes]); XENIX=yes], [AC_MSG_RESULT([no]); XENIX=])
- Macro: AC_YYTEXT_POINTER `AC_DECL_YYTEXT'Created Mon Nov 8 17:42:00 2004 on tillpc with info_to_html version 0.9.6.