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general.m4
# This file is part of Autoconf. -*- Autoconf -*- # Parameterized macros. m4_define([_AC_COPYRIGHT_YEARS], [ Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc. ]) # This file is part of Autoconf. This program is free # software; you can redistribute it and/or modify it under the # terms of the GNU General Public License as published by the # Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # Under Section 7 of GPL version 3, you are granted additional # permissions described in the Autoconf Configure Script Exception, # version 3.0, as published by the Free Software Foundation. # # You should have received a copy of the GNU General Public License # and a copy of the Autoconf Configure Script Exception along with # this program; see the files COPYINGv3 and COPYING.EXCEPTION # respectively. If not, see <http://www.gnu.org/licenses/>. # Written by David MacKenzie, with help from # Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, # Roland McGrath, Noah Friedman, david d zuhn, and many others. ## ---------------- ## ## The diversions. ## ## ---------------- ## # We heavily use m4's diversions both for the initializations and for # required macros (see AC_REQUIRE), because in both cases we have to # issue high in `configure' something which is discovered late. # # KILL is only used to suppress output. # # The layers of `configure'. We let m4 undivert them by itself, when # it reaches the end of `configure.ac'. # # - BINSH # #! /bin/sh # - HEADER-REVISION # Sent by AC_REVISION # - HEADER-COMMENT # Purpose of the script. # - HEADER-COPYRIGHT # Copyright notice(s) # - M4SH-INIT # Initialization of bottom layers. # # - DEFAULTS # early initializations (defaults) # - PARSE_ARGS # initialization code, option handling loop. # # - HELP_BEGIN # Handling `configure --help'. # - HELP_CANON # Help msg for AC_CANONICAL_* # - HELP_ENABLE # Help msg from AC_ARG_ENABLE. # - HELP_WITH # Help msg from AC_ARG_WITH. # - HELP_VAR # Help msg from AC_ARG_VAR. # - HELP_VAR_END # A small paragraph on the use of the variables. # - HELP_END # Tail of the handling of --help. # # - VERSION_BEGIN # Head of the handling of --version. # - VERSION_FSF # FSF copyright notice for --version. # - VERSION_USER # User copyright notice for --version. # - VERSION_END # Tail of the handling of --version. # # - SHELL_FN # Shell functions. # # - INIT_PREPARE # Tail of initialization code. # # - BODY # the tests and output code # # _m4_divert(DIVERSION-NAME) # -------------------------- # Convert a diversion name into its number. 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BODY m4_define([_m4_divert(DEFAULTS)], 10) m4_define([_m4_divert(PARSE_ARGS)], 20) m4_define([_m4_divert(HELP_BEGIN)], 100) m4_define([_m4_divert(HELP_CANON)], 101) m4_define([_m4_divert(HELP_ENABLE)], 102) m4_define([_m4_divert(HELP_WITH)], 103) m4_define([_m4_divert(HELP_VAR)], 104) m4_define([_m4_divert(HELP_VAR_END)], 105) m4_define([_m4_divert(HELP_END)], 106) m4_define([_m4_divert(VERSION_BEGIN)], 200) m4_define([_m4_divert(VERSION_FSF)], 201) m4_define([_m4_divert(VERSION_USER)], 202) m4_define([_m4_divert(VERSION_END)], 203) m4_define([_m4_divert(SHELL_FN)], 250) m4_define([_m4_divert(INIT_PREPARE)], 300) # AC_DIVERT_PUSH(DIVERSION-NAME) # AC_DIVERT_POP # ------------------------------ m4_copy([m4_divert_push],[AC_DIVERT_PUSH]) m4_copy([m4_divert_pop], [AC_DIVERT_POP]) ## ------------------------------------ ## ## Defining/requiring Autoconf macros. ## ## ------------------------------------ ## # AC_DEFUN(NAME, EXPANSION) # AC_DEFUN_ONCE(NAME, EXPANSION) # AC_BEFORE(THIS-MACRO-NAME, CALLED-MACRO-NAME) # AC_REQUIRE(STRING) # AC_PROVIDE(MACRO-NAME) # AC_PROVIDE_IFELSE(MACRO-NAME, IF-PROVIDED, IF-NOT-PROVIDED) # ----------------------------------------------------------- m4_copy([m4_defun], [AC_DEFUN]) m4_copy([m4_defun_once], [AC_DEFUN_ONCE]) m4_copy([m4_before], [AC_BEFORE]) m4_copy([m4_require], [AC_REQUIRE]) m4_copy([m4_provide], [AC_PROVIDE]) m4_copy([m4_provide_if], [AC_PROVIDE_IFELSE]) # AC_OBSOLETE(THIS-MACRO-NAME, [SUGGESTION]) # ------------------------------------------ m4_define([AC_OBSOLETE], [AC_DIAGNOSE([obsolete], [$1 is obsolete$2])]) ## ----------------------------- ## ## Implementing shell functions. ## ## ----------------------------- ## # AC_REQUIRE_SHELL_FN(NAME-TO-CHECK, COMMENT, BODY, [DIVERSION = SHELL_FN] # ------------------------------------------------------------------------ # Same as AS_REQUIRE_SHELL_FN except that the default diversion comes # later in the script (speeding up configure --help and --version). 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Try to catch common mistakes. m4_defun([AC_CACHE_VAL], [AS_LITERAL_WORD_IF([$1], [m4_if(m4_index(m4_quote($1), [_cv_]), [-1], [AC_DIAGNOSE([syntax], [$0($1, ...): suspicious cache-id, must contain _cv_ to be cached])])])dnl m4_if(m4_index([$2], [AC_DEFINE]), [-1], [], [AC_DIAGNOSE([syntax], [$0($1, ...): suspicious presence of an AC_DEFINE in the second argument, ]dnl [where no actions should be taken])])dnl m4_if(m4_index([$2], [AC_SUBST]), [-1], [], [AC_DIAGNOSE([syntax], [$0($1, ...): suspicious presence of an AC_SUBST in the second argument, ]dnl [where no actions should be taken])])dnl AS_VAR_SET_IF([$1], [_AS_ECHO_N([(cached) ])], [$2]) ]) # AC_CACHE_CHECK(MESSAGE, CACHE-ID, COMMANDS) # ------------------------------------------- # Do not call this macro with a dnl right behind. m4_defun([AC_CACHE_CHECK], [AC_MSG_CHECKING([$1]) AC_CACHE_VAL([$2], [$3])dnl AS_LITERAL_WORD_IF([$2], [AC_MSG_RESULT([$$2])], [AS_VAR_COPY([ac_res], [$2]) AC_MSG_RESULT([$ac_res])])dnl ]) # _AC_CACHE_CHECK_INT(MESSAGE, CACHE-ID, EXPRESSION, # [PROLOGUE = DEFAULT-INCLUDES], [IF-FAILS]) # -------------------------------------------------------------- AC_DEFUN([_AC_CACHE_CHECK_INT], [AC_CACHE_CHECK([$1], [$2], [AC_COMPUTE_INT([$2], [$3], [$4], [$5])]) ])# _AC_CACHE_CHECK_INT ## ---------------------- ## ## Defining CPP symbols. ## ## ---------------------- ## # AC_DEFINE_TRACE_LITERAL(LITERAL-CPP-SYMBOL) # ------------------------------------------- # Used by --trace to collect the list of AC_DEFINEd macros. m4_define([AC_DEFINE_TRACE_LITERAL], [m4_pattern_allow([^$1$])dnl AS_IDENTIFIER_IF([$1], [], [m4_warn([syntax], [AC_DEFINE: not an identifier: $1])])dnl ])# AC_DEFINE_TRACE_LITERAL # AC_DEFINE_TRACE(CPP-SYMBOL) # --------------------------- # This macro is a wrapper around AC_DEFINE_TRACE_LITERAL which filters # out non literal symbols. CPP-SYMBOL must not include any parameters. m4_define([AC_DEFINE_TRACE], [AS_LITERAL_WORD_IF([$1], [AC_DEFINE_TRACE_LITERAL(_m4_expand([$1]))])]) # AC_DEFINE(VARIABLE, [VALUE], [DESCRIPTION]) # ------------------------------------------- # Set VARIABLE to VALUE, verbatim, or 1. Remember the value # and if VARIABLE is affected the same VALUE, do nothing, else # die. The third argument is used by autoheader. m4_define([AC_DEFINE], [_AC_DEFINE_Q([_$0], $@)]) # _AC_DEFINE(STRING) # ------------------ # Append the pre-expanded STRING and a newline to confdefs.h, as if by # a quoted here-doc. m4_define([_AC_DEFINE], [AS_ECHO(["AS_ESCAPE([[$1]])"]) >>confdefs.h]) # AC_DEFINE_UNQUOTED(VARIABLE, [VALUE], [DESCRIPTION]) # ---------------------------------------------------- # Similar, but perform shell substitutions $ ` \ once on VALUE, as # in an unquoted here-doc. m4_define([AC_DEFINE_UNQUOTED], [_AC_DEFINE_Q([_$0], $@)]) # _AC_DEFINE_UNQUOTED(STRING) # --------------------------- # Append the pre-expanded STRING and a newline to confdefs.h, as if # with an unquoted here-doc, but avoiding a fork in the common case of # no backslash, no command substitution, no complex variable # substitution, and no quadrigraphs. m4_define([_AC_DEFINE_UNQUOTED], [m4_if(m4_bregexp([$1], [\\\|`\|\$(\|\${\|@]), [-1], [AS_ECHO(["AS_ESCAPE([$1], [""])"]) >>confdefs.h], [cat >>confdefs.h <<_ACEOF [$1] _ACEOF])]) # _AC_DEFINE_Q(MACRO, VARIABLE, [VALUE], [DESCRIPTION]) # ----------------------------------------------------- # Internal function that performs common elements of AC_DEFINE{,_UNQUOTED}. # MACRO must take one argument, which is the fully expanded string to # append to confdefs.h as if by a possibly-quoted here-doc. # # m4_index is roughly 5 to 8 times faster than m4_bpatsubst, so we use # m4_format rather than regex to grab prefix up to first (). AC_name # is defined with over-quotation, so that we can avoid m4_defn; this # is only safe because the name should not contain $. # # Guarantee a match in m4_index, so as to avoid a bug with precision # -1 in m4_format in older m4. m4_define([_AC_DEFINE_Q], [m4_pushdef([AC_name], m4_format([[[%.*s]]], m4_index([$2(], [(]), [$2]))]dnl [AC_DEFINE_TRACE(AC_name)]dnl [m4_cond([m4_index([$3], [ ])], [-1], [], [m4_bregexp([[$3]], [[^\\] ], [-])], [], [], [m4_warn([syntax], [AC_DEFINE]m4_if([$1], [_AC_DEFINE], [], [[_UNQUOTED]])[: `$3' is not a valid preprocessor define value])])]dnl [m4_ifval([$4], [AH_TEMPLATE(AC_name, [$4]) ])_m4_popdef([AC_name])]dnl [$1(m4_expand([[@%:@define] $2 ]m4_if([$#], 2, 1, [$3], [], [/**/], [[$3]]))) ]) ## -------------------------- ## ## Setting output variables. ## ## -------------------------- ## # AC_SUBST_TRACE(VARIABLE) # ------------------------ # This macro is used with --trace to collect the list of substituted variables. m4_define([AC_SUBST_TRACE]) # AC_SUBST(VARIABLE, [VALUE]) # --------------------------- # Create an output variable from a shell VARIABLE. If VALUE is given # assign it to VARIABLE. Use `""' if you want to set VARIABLE to an # empty value, not an empty second argument. # m4_define([AC_SUBST], [AS_IDENTIFIER_IF([$1], [], [m4_fatal([$0: `$1' is not a valid shell variable name])])]dnl [AC_SUBST_TRACE([$1])]dnl [m4_pattern_allow([^$1$])]dnl [m4_ifvaln([$2], [$1=$2])[]]dnl [m4_set_add([_AC_SUBST_VARS], [$1])])# AC_SUBST # AC_SUBST_FILE(VARIABLE) # ----------------------- # Read the comments of the preceding macro. m4_define([AC_SUBST_FILE], [m4_pattern_allow([^$1$])dnl m4_append_uniq([_AC_SUBST_FILES], [$1], [ ])]) ## --------------------------------------- ## ## Printing messages at autoconf runtime. ## ## --------------------------------------- ## # In fact, I think we should promote the use of m4_warn and m4_fatal # directly. This will also avoid to some people to get it wrong # between AC_FATAL and AC_MSG_ERROR. # AC_DIAGNOSE(CATEGORY, MESSAGE) # AC_FATAL(MESSAGE, [EXIT-STATUS]) # -------------------------------- m4_define([AC_DIAGNOSE], [m4_warn($@)]) m4_define([AC_FATAL], [m4_fatal($@)]) # AC_WARNING(MESSAGE) # ------------------- # Report a MESSAGE to the user of autoconf if `-W' or `-W all' was # specified. m4_define([AC_WARNING], [AC_DIAGNOSE([syntax], [$1])]) ## ---------------------------------------- ## ## Printing messages at configure runtime. ## ## ---------------------------------------- ## # AC_MSG_CHECKING(FEATURE) # ------------------------ m4_define([AC_MSG_CHECKING], [{ _AS_ECHO_LOG([checking $1]) _AS_ECHO_N([checking $1... ]); }dnl ]) # AC_MSG_RESULT(RESULT) # --------------------- m4_define([AC_MSG_RESULT], [{ _AS_ECHO_LOG([result: $1]) _AS_ECHO([$1]); }dnl ]) # AC_MSG_WARN(PROBLEM) # AC_MSG_NOTICE(STRING) # AC_MSG_ERROR(ERROR, [EXIT-STATUS = 1]) # AC_MSG_FAILURE(ERROR, [EXIT-STATUS = 1]) # ---------------------------------------- m4_copy([AS_WARN], [AC_MSG_WARN]) m4_copy([AS_MESSAGE], [AC_MSG_NOTICE]) m4_copy([AS_ERROR], [AC_MSG_ERROR]) m4_define([AC_MSG_FAILURE], [{ AS_MESSAGE([error: in `$ac_pwd':], 2) AC_MSG_ERROR([$1 See `config.log' for more details], [$2]); }]) # _AC_MSG_LOG_CONFTEST # -------------------- m4_define([_AC_MSG_LOG_CONFTEST], [AS_ECHO(["$as_me: failed program was:"]) >&AS_MESSAGE_LOG_FD sed 's/^/| /' conftest.$ac_ext >&AS_MESSAGE_LOG_FD ]) # AU::AC_CHECKING(FEATURE) # ------------------------ AU_DEFUN([AC_CHECKING], [AS_MESSAGE([checking $1...])]) # AU::AC_MSG_RESULT_UNQUOTED(RESULT) # ---------------------------------- # No escaping, so it performed also backtick substitution. AU_DEFUN([AC_MSG_RESULT_UNQUOTED], [_AS_ECHO_UNQUOTED([$as_me:${as_lineno-$LINENO}: result: $1], AS_MESSAGE_LOG_FD) _AS_ECHO_UNQUOTED([$1])[]dnl ]) # AU::AC_VERBOSE(STRING) # ---------------------- AU_ALIAS([AC_VERBOSE], [AC_MSG_RESULT]) ## ---------------------------- ## ## Compiler-running mechanics. ## ## ---------------------------- ## # _AC_RUN_LOG(COMMAND, LOG-COMMANDS) # ---------------------------------- # Eval COMMAND, save the exit status in ac_status, and log it. The return # code is 0 if COMMAND succeeded, so that it can be used directly in AS_IF # constructs. AC_DEFUN([_AC_RUN_LOG], [{ { $2; } >&AS_MESSAGE_LOG_FD ($1) 2>&AS_MESSAGE_LOG_FD ac_status=$? _AS_ECHO_LOG([\$? = $ac_status]) test $ac_status = 0; }]) # _AC_RUN_LOG_STDERR(COMMAND, LOG-COMMANDS) # ----------------------------------------- # Run COMMAND, save its stderr into conftest.err, save the exit status # in ac_status, and log it. Don't forget to clean up conftest.err after # use. # Note that when tracing, most shells will leave the traces in stderr # starting with "+": that's what this macro tries to address. # The return code is 0 if COMMAND succeeded, so that it can be used directly # in AS_IF constructs. AC_DEFUN([_AC_RUN_LOG_STDERR], [{ { $2; } >&AS_MESSAGE_LOG_FD ($1) 2>conftest.err ac_status=$? if test -s conftest.err; then grep -v '^ *+' conftest.err >conftest.er1 cat conftest.er1 >&AS_MESSAGE_LOG_FD mv -f conftest.er1 conftest.err fi _AS_ECHO_LOG([\$? = $ac_status]) test $ac_status = 0; }]) # _AC_RUN_LOG_LIMIT(COMMAND, LOG-COMMANDS, [LINES]) # ------------------------------------------------- # Like _AC_RUN_LOG, but only log LINES lines from stderr, # defaulting to 10 lines. AC_DEFUN([_AC_RUN_LOG_LIMIT], [{ { $2; } >&AS_MESSAGE_LOG_FD ($1) 2>conftest.err ac_status=$? if test -s conftest.err; then sed 'm4_default([$3], [10])a\ ... rest of stderr output deleted ... m4_default([$3], [10])q' conftest.err >conftest.er1 cat conftest.er1 >&AS_MESSAGE_LOG_FD fi rm -f conftest.er1 conftest.err _AS_ECHO_LOG([\$? = $ac_status]) test $ac_status = 0; }]) # _AC_DO_ECHO(COMMAND) # -------------------- # Echo COMMAND. This is designed to be used just before evaluating COMMAND. AC_DEFUN([_AC_DO_ECHO], [m4_if([$1], [$ac_try], [], [ac_try="$1" ])]dnl dnl If the string contains '\"', '`', or '\\', then just echo it rather dnl than expanding it. This is a hack, but it is safer, while also dnl typically expanding simple substrings like '$CC', which is what we want. dnl dnl Much of this macro body is quoted, to work around misuses like dnl `AC_CHECK_FUNC(sigblock, , AC_CHECK_LIB(bsd, sigblock))', dnl which underquotes the 3rd arg and would misbehave if we didn't quote here. dnl The "(($ac_try" instead of $ac_try avoids problems with even-worse dnl underquoting misuses, such as dnl `AC_CHECK_FUNC(foo, , AC_CHECK_LIB(a, foo, , AC_CHECK_LIB(b, foo)))'. dnl We normally wouldn't bother with this kind of workaround for invalid code dnl but this change was put in just before Autoconf 2.60 and we wanted to dnl minimize the integration hassle. [[case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""] AS_ECHO(["$ac_try_echo"])]) # _AC_DO(COMMAND) # --------------- # Eval COMMAND, save the exit status in ac_status, and log it. # For internal use only. AC_DEFUN([_AC_DO], [_AC_RUN_LOG([eval "$1"], [_AC_DO_ECHO([$1])])]) # _AC_DO_STDERR(COMMAND) # ---------------------- # Like _AC_RUN_LOG_STDERR, but eval (instead of running) COMMAND. AC_DEFUN([_AC_DO_STDERR], [_AC_RUN_LOG_STDERR([eval "$1"], [_AC_DO_ECHO([$1])])]) # _AC_DO_VAR(VARIABLE) # -------------------- # Evaluate "$VARIABLE", which should be a valid shell command. # The purpose of this macro is to write "configure:123: command line" # into config.log for every test run. AC_DEFUN([_AC_DO_VAR], [_AC_DO([$$1])]) # _AC_DO_TOKENS(COMMAND) # ---------------------- # Like _AC_DO_VAR, but execute COMMAND instead, where COMMAND is a series of # tokens of the shell command language. AC_DEFUN([_AC_DO_TOKENS], [{ ac_try='$1' _AC_DO([$ac_try]); }]) # _AC_DO_LIMIT(COMMAND, [LINES]) # ------------------------------ # Like _AC_DO, but limit the amount of stderr lines logged to LINES. # For internal use only. AC_DEFUN([_AC_DO_LIMIT], [_AC_RUN_LOG_LIMIT([eval "$1"], [_AC_DO_ECHO([$1])], [$2])]) # _AC_EVAL(COMMAND) # ----------------- # Eval COMMAND, save the exit status in ac_status, and log it. # Unlike _AC_DO, this macro mishandles quoted arguments in some cases. # It is present only for backward compatibility with previous Autoconf versions. AC_DEFUN([_AC_EVAL], [_AC_RUN_LOG([eval $1], [eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$1\""])]) # _AC_EVAL_STDERR(COMMAND) # ------------------------ # Like _AC_RUN_LOG_STDERR, but eval (instead of running) COMMAND. # Unlike _AC_DO_STDERR, this macro mishandles quoted arguments in some cases. # It is present only for backward compatibility with previous Autoconf versions. AC_DEFUN([_AC_EVAL_STDERR], [_AC_RUN_LOG_STDERR([eval $1], [eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$1\""])]) # AC_TRY_EVAL(VARIABLE) # --------------------- # Evaluate $VARIABLE, which should be a valid shell command. # The purpose of this macro is to write "configure:123: command line" # into config.log for every test run. # # The AC_TRY_EVAL and AC_TRY_COMMAND macros are dangerous and # undocumented, and should not be used. # They may be removed or their API changed in a future release. # Autoconf itself no longer uses these two macros; they are present # only for backward compatibility with previous versions of Autoconf. # Not every shell command will work due to problems with eval # and quoting, and the rules for exactly what does work are tricky. # Worse, due to double-expansion during evaluation, arbitrary unintended # shell commands could be executed in some situations. AC_DEFUN([AC_TRY_EVAL], [_AC_EVAL([$$1])]) # AC_TRY_COMMAND(COMMAND) # ----------------------- # Like AC_TRY_EVAL, but execute COMMAND instead, where COMMAND is a series of # tokens of the shell command language. # This macro should not be used; see the comments under AC_TRY_EVAL for why. AC_DEFUN([AC_TRY_COMMAND], [{ ac_try='$1' _AC_EVAL([$ac_try]); }]) # AC_RUN_LOG(COMMAND) # ------------------- AC_DEFUN([AC_RUN_LOG], [_AC_RUN_LOG([$1], [AS_ECHO(["$as_me:${as_lineno-$LINENO}: AS_ESCAPE([$1])"])])]) ## ------------------------ ## ## Examining declarations. ## ## ------------------------ ## # _AC_PREPROC_IFELSE_BODY # ----------------------- # Shell function body for _AC_PREPROC_IFELSE. m4_define([_AC_PREPROC_IFELSE_BODY], [ AS_LINENO_PUSH([$[]1]) AS_IF([_AC_DO_STDERR([$ac_cpp conftest.$ac_ext]) > conftest.i && { test -z "$ac_[]_AC_LANG_ABBREV[]_preproc_warn_flag$ac_[]_AC_LANG_ABBREV[]_werror_flag" || test ! -s conftest.err }], [ac_retval=0], [_AC_MSG_LOG_CONFTEST ac_retval=1]) AS_LINENO_POP AS_SET_STATUS([$ac_retval]) ])# _AC_PREPROC_IFELSE_BODY # _AC_PREPROC_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # ---------------------------------------------------------------- # Try to preprocess PROGRAM. # # This macro can be used during the selection of a preprocessor. # eval is necessary to expand ac_cpp. AC_DEFUN([_AC_PREPROC_IFELSE], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_try_cpp], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_try_cpp], [LINENO], [Try to preprocess conftest.$ac_ext, and return whether this succeeded.])], [$0_BODY])]dnl [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])]dnl [AS_IF([ac_fn_[]_AC_LANG_ABBREV[]_try_cpp "$LINENO"], [$2], [$3]) rm -f conftest.err conftest.i[]m4_ifval([$1], [ conftest.$ac_ext])[]dnl ])# _AC_PREPROC_IFELSE # AC_PREPROC_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # --------------------------------------------------------------- # Try to preprocess PROGRAM. Requires that the preprocessor for the # current language was checked for, hence do not use this macro in macros # looking for a preprocessor. AC_DEFUN([AC_PREPROC_IFELSE], [AC_LANG_PREPROC_REQUIRE()dnl _AC_PREPROC_IFELSE($@)]) # AC_TRY_CPP(INCLUDES, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # --------------------------------------------------------- # AC_TRY_CPP is used to check whether particular header files exist. # (But it actually tests whether INCLUDES produces no CPP errors.) # # INCLUDES are not defaulted and are double quoted. AU_DEFUN([AC_TRY_CPP], [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[$1]])], [$2], [$3])]) # AC_EGREP_CPP(PATTERN, PROGRAM, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) # ------------------------------------------------------ # Because this macro is used by AC_PROG_GCC_TRADITIONAL, which must # come early, it is not included in AC_BEFORE checks. AC_DEFUN([AC_EGREP_CPP], [AC_LANG_PREPROC_REQUIRE()dnl AC_REQUIRE([AC_PROG_EGREP])dnl AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])]) AS_IF([dnl eval is necessary to expand ac_cpp. dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell. (eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | dnl Quote $1 to prevent m4 from eating character classes $EGREP "[$1]" >/dev/null 2>&1], [$3], [$4]) rm -f conftest* ])# AC_EGREP_CPP # AC_EGREP_HEADER(PATTERN, HEADER-FILE, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) # --------------------------------------------------------- AC_DEFUN([AC_EGREP_HEADER], [AC_EGREP_CPP([$1], [#include <$2> ], [$3], [$4])]) ## ------------------ ## ## Examining syntax. ## ## ------------------ ## # _AC_COMPILE_IFELSE_BODY # ----------------------- # Shell function body for _AC_COMPILE_IFELSE. m4_define([_AC_COMPILE_IFELSE_BODY], [ AS_LINENO_PUSH([$[]1]) rm -f conftest.$ac_objext AS_IF([_AC_DO_STDERR($ac_compile) && { test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" || test ! -s conftest.err } && test -s conftest.$ac_objext], [ac_retval=0], [_AC_MSG_LOG_CONFTEST ac_retval=1]) AS_LINENO_POP AS_SET_STATUS([$ac_retval]) ])# _AC_COMPILE_IFELSE_BODY # _AC_COMPILE_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # ---------------------------------------------------------------- # Try to compile PROGRAM. # This macro can be used during the selection of a compiler. AC_DEFUN([_AC_COMPILE_IFELSE], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_try_compile], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_try_compile], [LINENO], [Try to compile conftest.$ac_ext, and return whether this succeeded.])], [$0_BODY])]dnl [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])]dnl [AS_IF([ac_fn_[]_AC_LANG_ABBREV[]_try_compile "$LINENO"], [$2], [$3]) rm -f core conftest.err conftest.$ac_objext[]m4_ifval([$1], [ conftest.$ac_ext])[]dnl ])# _AC_COMPILE_IFELSE # AC_COMPILE_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # --------------------------------------------------------------- # Try to compile PROGRAM. Requires that the compiler for the current # language was checked for, hence do not use this macro in macros looking # for a compiler. AC_DEFUN([AC_COMPILE_IFELSE], [AC_LANG_COMPILER_REQUIRE()dnl _AC_COMPILE_IFELSE($@)]) # AC_TRY_COMPILE(INCLUDES, FUNCTION-BODY, # [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # --------------------------------------------------- AU_DEFUN([AC_TRY_COMPILE], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$1]], [[$2]])], [$3], [$4])]) ## --------------------- ## ## Examining libraries. ## ## --------------------- ## # _AC_LINK_IFELSE_BODY # -------------------- # Shell function body for _AC_LINK_IFELSE. m4_define([_AC_LINK_IFELSE_BODY], [ AS_LINENO_PUSH([$[]1]) rm -f conftest.$ac_objext conftest$ac_exeext AS_IF([_AC_DO_STDERR($ac_link) && { test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" || test ! -s conftest.err } && test -s conftest$ac_exeext && { test "$cross_compiling" = yes || AS_TEST_X([conftest$ac_exeext]) }], [ac_retval=0], [_AC_MSG_LOG_CONFTEST ac_retval=1]) # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would # interfere with the next link command; also delete a directory that is # left behind by Apple's compiler. We do this before executing the actions. rm -rf conftest.dSYM conftest_ipa8_conftest.oo AS_LINENO_POP AS_SET_STATUS([$ac_retval]) ])# _AC_LINK_IFELSE_BODY # _AC_LINK_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # ------------------------------------------------------------- # Try to link PROGRAM. # This macro can be used during the selection of a compiler. # # Test that resulting file is executable; see the problem reported by mwoehlke # in <http://lists.gnu.org/archive/html/bug-coreutils/2006-10/msg00048.html>. # But skip the test when cross-compiling, to prevent problems like the one # reported by Chris Johns in # <http://lists.gnu.org/archive/html/autoconf/2007-03/msg00085.html>. # AC_DEFUN([_AC_LINK_IFELSE], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_try_link], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_try_link], [LINENO], [Try to link conftest.$ac_ext, and return whether this succeeded.])], [$0_BODY])]dnl [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])]dnl [AS_IF([ac_fn_[]_AC_LANG_ABBREV[]_try_link "$LINENO"], [$2], [$3]) rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext[]m4_ifval([$1], [ conftest.$ac_ext])[]dnl ])# _AC_LINK_IFELSE # AC_LINK_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # ------------------------------------------------------------ # Try to link PROGRAM. Requires that the compiler for the current # language was checked for, hence do not use this macro in macros looking # for a compiler. AC_DEFUN([AC_LINK_IFELSE], [AC_LANG_COMPILER_REQUIRE()dnl _AC_LINK_IFELSE($@)]) # AC_TRY_LINK(INCLUDES, FUNCTION-BODY, # [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # ------------------------------------------------ # Contrarily to AC_LINK_IFELSE, this macro double quote its first two args. AU_DEFUN([AC_TRY_LINK], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[$1]], [[$2]])], [$3], [$4])]) # AC_COMPILE_CHECK(ECHO-TEXT, INCLUDES, FUNCTION-BODY, # ACTION-IF-TRUE, [ACTION-IF-FALSE]) # --------------------------------------------------- AU_DEFUN([AC_COMPILE_CHECK], [m4_ifvaln([$1], [AC_MSG_CHECKING([for $1])])dnl AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2]], [[$3]])], [$4], [$5])]) ## ------------------------------- ## ## Checking for runtime features. ## ## ------------------------------- ## # _AC_RUN_IFELSE_BODY # ------------------- # Shell function body for _AC_RUN_IFELSE. m4_define([_AC_RUN_IFELSE_BODY], [ AS_LINENO_PUSH([$[]1]) AS_IF([_AC_DO_VAR(ac_link) && _AC_DO_TOKENS(./conftest$ac_exeext)], [ac_retval=0], [AS_ECHO(["$as_me: program exited with status $ac_status"]) >&AS_MESSAGE_LOG_FD _AC_MSG_LOG_CONFTEST ac_retval=$ac_status]) rm -rf conftest.dSYM conftest_ipa8_conftest.oo AS_LINENO_POP AS_SET_STATUS([$ac_retval]) ])# _AC_RUN_IFELSE_BODY # _AC_RUN_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # ------------------------------------------------------------ # Compile, link, and run. # This macro can be used during the selection of a compiler. # We also remove conftest.o as if the compilation fails, some compilers # don't remove it. We remove gmon.out and bb.out, which may be # created during the run if the program is built with profiling support. AC_DEFUN([_AC_RUN_IFELSE], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_try_run], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_try_run], [LINENO], [Try to link conftest.$ac_ext, and return whether this succeeded. Assumes that executables *can* be run.])], [$0_BODY])]dnl [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])]dnl [AS_IF([ac_fn_[]_AC_LANG_ABBREV[]_try_run "$LINENO"], [$2], [$3]) rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ conftest.$ac_objext conftest.beam[]m4_ifval([$1], [ conftest.$ac_ext])[]dnl ])# _AC_RUN_IFELSE # AC_RUN_IFELSE(PROGRAM, # [ACTION-IF-TRUE], [ACTION-IF-FALSE], # [ACTION-IF-CROSS-COMPILING = RUNTIME-ERROR]) # ---------------------------------------------------------- # Compile, link, and run. Requires that the compiler for the current # language was checked for, hence do not use this macro in macros looking # for a compiler. AC_DEFUN([AC_RUN_IFELSE], [AC_LANG_COMPILER_REQUIRE()dnl m4_ifval([$4], [], [AC_DIAGNOSE([cross], [$0 called without default to allow cross compiling])])dnl AS_IF([test "$cross_compiling" = yes], [m4_default([$4], [AC_MSG_FAILURE([cannot run test program while cross compiling])])], [_AC_RUN_IFELSE($@)]) ]) # AC_TRY_RUN(PROGRAM, # [ACTION-IF-TRUE], [ACTION-IF-FALSE], # [ACTION-IF-CROSS-COMPILING = RUNTIME-ERROR]) # ------------------------------------------------------- AU_DEFUN([AC_TRY_RUN], [AC_RUN_IFELSE([AC_LANG_SOURCE([[$1]])], [$2], [$3], [$4])]) ## ------------------------------------- ## ## Checking for the existence of files. ## ## ------------------------------------- ## # AC_CHECK_FILE(FILE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) # ------------------------------------------------------------- # # Check for the existence of FILE. AC_DEFUN([AC_CHECK_FILE], [AC_DIAGNOSE([cross], [cannot check for file existence when cross compiling])dnl AS_VAR_PUSHDEF([ac_File], [ac_cv_file_$1])dnl AC_CACHE_CHECK([for $1], [ac_File], [test "$cross_compiling" = yes && AC_MSG_ERROR([cannot check for file existence when cross compiling]) if test -r "$1"; then AS_VAR_SET([ac_File], [yes]) else AS_VAR_SET([ac_File], [no]) fi]) AS_VAR_IF([ac_File], [yes], [$2], [$3]) AS_VAR_POPDEF([ac_File])dnl ])# AC_CHECK_FILE # _AC_CHECK_FILES(FILE) # --------------------- # Helper to AC_CHECK_FILES, which generates two of the three arguments # to AC_CHECK_FILE based on FILE. m4_define([_AC_CHECK_FILES], [[$1], [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$1]), [1], [Define to 1 if you have the file `$1'.])]]) # AC_CHECK_FILES(FILE..., [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) # ----------------------------------------------------------------- # For each word in the whitespace-separated FILE list, perform either # ACTION-IF-FOUND or ACTION-IF-NOT-FOUND. For files that exist, also # provide the preprocessor variable HAVE_FILE. AC_DEFUN([AC_CHECK_FILES], [m4_map_args_w([$1], [AC_CHECK_FILE(_$0(], [)[$2], [$3])])]) ## ------------------------------- ## ## Checking for declared symbols. ## ## ------------------------------- ## # _AC_CHECK_DECL_BODY # ------------------- # Shell function body for AC_CHECK_DECL. m4_define([_AC_CHECK_DECL_BODY], [ AS_LINENO_PUSH([$[]1]) [as_decl_name=`echo $][2|sed 's/ *(.*//'`] [as_decl_use=`echo $][2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`] AC_CACHE_CHECK([whether $as_decl_name is declared], [$[]3], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$[]4], [@%:@ifndef $[]as_decl_name @%:@ifdef __cplusplus (void) $[]as_decl_use; @%:@else (void) $[]as_decl_name; @%:@endif @%:@endif ])], [AS_VAR_SET([$[]3], [yes])], [AS_VAR_SET([$[]3], [no])])]) AS_LINENO_POP ])# _AC_CHECK_DECL_BODY # AC_CHECK_DECL(SYMBOL, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], # [INCLUDES = DEFAULT-INCLUDES]) # ------------------------------------------------------- # Check whether SYMBOL (a function, variable, or constant) is declared. AC_DEFUN([AC_CHECK_DECL], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_check_decl], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_check_decl], [LINENO SYMBOL VAR INCLUDES], [Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR accordingly.])], [_$0_BODY])]dnl [AS_VAR_PUSHDEF([ac_Symbol], [ac_cv_have_decl_$1])]dnl [ac_fn_[]_AC_LANG_ABBREV[]_check_decl ]dnl ["$LINENO" "$1" "ac_Symbol" "AS_ESCAPE([AC_INCLUDES_DEFAULT([$4])], [""])" AS_VAR_IF([ac_Symbol], [yes], [$2], [$3]) AS_VAR_POPDEF([ac_Symbol])dnl ])# AC_CHECK_DECL # _AC_CHECK_DECLS(SYMBOL, ACTION-IF_FOUND, ACTION-IF-NOT-FOUND, # INCLUDES) # ------------------------------------------------------------- # Helper to AC_CHECK_DECLS, which generates the check for a single # SYMBOL with INCLUDES, performs the AC_DEFINE, then expands # ACTION-IF-FOUND or ACTION-IF-NOT-FOUND. m4_define([_AC_CHECK_DECLS], [AC_CHECK_DECL([$1], [ac_have_decl=1], [ac_have_decl=0], [$4])]dnl [AC_DEFINE_UNQUOTED(AS_TR_CPP(m4_bpatsubst(HAVE_DECL_[$1],[ *(.*])), [$ac_have_decl], [Define to 1 if you have the declaration of `$1', and to 0 if you don't.])]dnl [m4_ifvaln([$2$3], [AS_IF([test $ac_have_decl = 1], [$2], [$3])])]) # AC_CHECK_DECLS(SYMBOLS, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], # [INCLUDES = DEFAULT-INCLUDES]) # -------------------------------------------------------- # Defines HAVE_DECL_SYMBOL to 1 if declared, 0 otherwise. See the # documentation for a detailed explanation of this difference with # other AC_CHECK_*S macros. SYMBOLS is an m4 list. AC_DEFUN([AC_CHECK_DECLS], [m4_map_args_sep([_$0(], [, [$2], [$3], [$4])], [], $1)]) # _AC_CHECK_DECL_ONCE(SYMBOL) # --------------------------- # Check for a single SYMBOL once. m4_define([_AC_CHECK_DECL_ONCE], [AC_DEFUN([_AC_Check_Decl_$1], [_AC_CHECK_DECLS([$1])])]dnl [AC_REQUIRE([_AC_Check_Decl_$1])]) # AC_CHECK_DECLS_ONCE(SYMBOLS) # ---------------------------- # Like AC_CHECK_DECLS(SYMBOLS), but do it at most once. AC_DEFUN([AC_CHECK_DECLS_ONCE], [m4_map_args_sep([_AC_CHECK_DECL_ONCE(], [)], [], $1)]) ## ---------------------------------- ## ## Replacement of library functions. ## ## ---------------------------------- ## # AC_CONFIG_LIBOBJ_DIR(DIRNAME) # ----------------------------- # Announce LIBOBJ replacement files are in $top_srcdir/DIRNAME. AC_DEFUN_ONCE([AC_CONFIG_LIBOBJ_DIR], [m4_divert_text([DEFAULTS], [ac_config_libobj_dir=$1])]) # AC_LIBSOURCE(FILE-NAME) # ----------------------- # Announce we might need the file `FILE-NAME'. m4_define([AC_LIBSOURCE], []) # AC_LIBSOURCES([FILE-NAME1, ...]) # -------------------------------- # Announce we might need these files. AC_DEFUN([AC_LIBSOURCES], [m4_map_args([AC_LIBSOURCE], $1)]) # _AC_LIBOBJ(FILE-NAME-NOEXT, ACTION-IF-INDIR) # -------------------------------------------- # We need `FILE-NAME-NOEXT.o', save this into `LIBOBJS'. m4_define([_AC_LIBOBJ], [case " $LIB@&t@OBJS " in *" $1.$ac_objext "* ) ;; *) AC_SUBST([LIB@&t@OBJS], ["$LIB@&t@OBJS $1.$ac_objext"]) ;; esac ]) # AC_LIBOBJ(FILE-NAME-NOEXT) # -------------------------- # We need `FILE-NAME-NOEXT.o', save this into `LIBOBJS'. AC_DEFUN([AC_LIBOBJ], [_AC_LIBOBJ([$1])]dnl [AS_LITERAL_WORD_IF([$1], [AC_LIBSOURCE([$1.c])], [AC_DIAGNOSE([syntax], [$0($1): you should use literals])])]) # _AC_LIBOBJS_NORMALIZE # --------------------- # Clean up LIBOBJS and LTLIBOBJS so that they work with 1. ac_objext, # 2. Automake's ANSI2KNR, 3. Libtool, 4. combination of the three. # Used with AC_CONFIG_COMMANDS_PRE. AC_DEFUN([_AC_LIBOBJS_NORMALIZE], [ac_libobjs= ac_ltlibobjs= m4_ifndef([AM_C_PROTOTYPES], [U= ])dnl for ac_i in : $LIB@&t@OBJS; do test "x$ac_i" = x: && continue # 1. Remove the extension, and $U if already installed. ac_script='s/\$U\././;s/\.o$//;s/\.obj$//' ac_i=`AS_ECHO(["$ac_i"]) | sed "$ac_script"` # 2. Prepend LIBOBJDIR. When used with automake>=1.10 LIBOBJDIR # will be set to the directory where LIBOBJS objects are built. AS_VAR_APPEND([ac_libobjs], [" \${LIBOBJDIR}$ac_i\$U.$ac_objext"]) AS_VAR_APPEND([ac_ltlibobjs], [" \${LIBOBJDIR}$ac_i"'$U.lo']) done AC_SUBST([LIB@&t@OBJS], [$ac_libobjs]) AC_SUBST([LTLIBOBJS], [$ac_ltlibobjs]) ]) ## ----------------------------------- ## ## Checking compiler characteristics. ## ## ----------------------------------- ## # _AC_COMPUTE_INT_COMPILE(EXPRESSION, VARIABLE, PROLOGUE, [IF-SUCCESS], # [IF-FAILURE]) # --------------------------------------------------------------------- # Compute the integer EXPRESSION and store the result in the VARIABLE. # Works OK if cross compiling, but assumes twos-complement arithmetic. m4_define([_AC_COMPUTE_INT_COMPILE], [# Depending upon the size, compute the lo and hi bounds. _AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$3], [($1) >= 0])], [ac_lo=0 ac_mid=0 while :; do _AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$3], [($1) <= $ac_mid])], [ac_hi=$ac_mid; break], [AS_VAR_ARITH([ac_lo], [$ac_mid + 1]) if test $ac_lo -le $ac_mid; then ac_lo= ac_hi= break fi AS_VAR_ARITH([ac_mid], [2 '*' $ac_mid + 1])]) done], [AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$3], [($1) < 0])], [ac_hi=-1 ac_mid=-1 while :; do _AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$3], [($1) >= $ac_mid])], [ac_lo=$ac_mid; break], [AS_VAR_ARITH([ac_hi], ['(' $ac_mid ')' - 1]) if test $ac_mid -le $ac_hi; then ac_lo= ac_hi= break fi AS_VAR_ARITH([ac_mid], [2 '*' $ac_mid])]) done], [ac_lo= ac_hi=])]) # Binary search between lo and hi bounds. while test "x$ac_lo" != "x$ac_hi"; do AS_VAR_ARITH([ac_mid], ['(' $ac_hi - $ac_lo ')' / 2 + $ac_lo]) _AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$3], [($1) <= $ac_mid])], [ac_hi=$ac_mid], [AS_VAR_ARITH([ac_lo], ['(' $ac_mid ')' + 1])]) done case $ac_lo in @%:@(( ?*) AS_VAR_SET([$2], [$ac_lo]); $4 ;; '') $5 ;; esac[]dnl ])# _AC_COMPUTE_INT_COMPILE # _AC_COMPUTE_INT_RUN(EXPRESSION, VARIABLE, PROLOGUE, [IF-SUCCESS], # [IF-FAILURE]) # ----------------------------------------------------------------- # Store the evaluation of the integer EXPRESSION in VARIABLE. # # AC_LANG_INT_SAVE intentionally does not end the file in a newline, so # we must add one to make it a text file before passing it to read. m4_define([_AC_COMPUTE_INT_RUN], [_AC_RUN_IFELSE([AC_LANG_INT_SAVE([$3], [$1])], [echo >>conftest.val; read $2 <conftest.val; $4], [$5]) rm -f conftest.val ])# _AC_COMPUTE_INT_RUN # _AC_COMPUTE_INT_BODY # -------------------- # Shell function body for AC_COMPUTE_INT. m4_define([_AC_COMPUTE_INT_BODY], [ AS_LINENO_PUSH([$[]1]) if test "$cross_compiling" = yes; then _AC_COMPUTE_INT_COMPILE([$[]2], [$[]3], [$[]4], [ac_retval=0], [ac_retval=1]) else _AC_COMPUTE_INT_RUN([$[]2], [$[]3], [$[]4], [ac_retval=0], [ac_retval=1]) fi AS_LINENO_POP AS_SET_STATUS([$ac_retval]) ])# _AC_COMPUTE_INT_BODY # AC_COMPUTE_INT(VARIABLE, EXPRESSION, PROLOGUE, [IF-FAILS]) # ---------------------------------------------------------- # Store into the shell variable VARIABLE the value of the integer C expression # EXPRESSION. The value should fit in an initializer in a C variable of type # `signed long'. If no PROLOGUE are specified, the default includes are used. # IF-FAILS is evaluated if the value cannot be found (which includes the # case of cross-compilation, if EXPRESSION is not computable at compile-time. AC_DEFUN([AC_COMPUTE_INT], [AC_LANG_COMPILER_REQUIRE()]dnl [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_compute_int], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_compute_int], [LINENO EXPR VAR INCLUDES], [Tries to find the compile-time value of EXPR in a program that includes INCLUDES, setting VAR accordingly. Returns whether the value could be computed])], [_$0_BODY])]dnl [AS_IF([ac_fn_[]_AC_LANG_ABBREV[]_compute_int "$LINENO" "$2" "$1" ]dnl ["AS_ESCAPE([$3], [""])"], [], [$4]) ])# AC_COMPUTE_INT # _AC_COMPUTE_INT(EXPRESSION, VARIABLE, PROLOGUE, [IF-FAILS]) # ----------------------------------------------------------- # FIXME: this private interface was used by several packages. # Give them time to transition to AC_COMPUTE_INT and then delete this one. AC_DEFUN([_AC_COMPUTE_INT], [AC_COMPUTE_INT([$2], [$1], [$3], [$4]) AC_DIAGNOSE([obsolete], [The macro `_AC_COMPUTE_INT' is obsolete and will be deleted in a future version or Autoconf. Hence, it is suggested that you use instead the public AC_COMPUTE_INT macro. Note that the arguments are slightly different between the two.])dnl ])# _AC_COMPUTE_INT
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