diff --git a/.gitignore b/.gitignore index e69a9a7..6ab1000 100644 --- a/.gitignore +++ b/.gitignore @@ -3,3 +3,15 @@ release .svn .cvsignore *~ +/Makefile +/Makefile.in +/aclocal.m4 +/autom4te.cache/ +/build-aux/install-sh +/build-aux/missing +/config.log +/config.status +/configure +/ddclient +/ddclient-*.tar.gz +/ddclient.conf diff --git a/ChangeLog.md b/ChangeLog.md index 58f7927..8002ac4 100644 --- a/ChangeLog.md +++ b/ChangeLog.md @@ -9,6 +9,10 @@ repository history](https://github.com/ddclient/ddclient/commits/master). * Added support for OVH DynHost. * Added support for ClouDNS. + * Added a build system to make it easier for distributions to package + ddclient: + + ./autogen && ./configure && make && make install ### Bug fixes diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..91524aa --- /dev/null +++ b/Makefile.am @@ -0,0 +1,58 @@ +ACLOCAL_AMFLAGS = -I m4 +EXTRA_DIST = \ + CONTRIBUTING.md \ + COPYING \ + COPYRIGHT \ + ChangeLog.md \ + README.cisco \ + README.md \ + README.ssl \ + TODO \ + UPGRADE \ + autogen \ + sample-ddclient-wrapper.sh \ + sample-etc_cron.d_ddclient \ + sample-etc_dhclient-exit-hooks \ + sample-etc_dhcpc_dhcpcd-eth0.exe \ + sample-etc_ppp_ip-up.local \ + sample-etc_rc.d_init.d_ddclient \ + sample-etc_rc.d_init.d_ddclient.alpine \ + sample-etc_rc.d_init.d_ddclient.lsb \ + sample-etc_rc.d_init.d_ddclient.redhat \ + sample-etc_rc.d_init.d_ddclient.ubuntu \ + sample-etc_systemd.service \ + sample-get-ip-from-fritzbox +CLEANFILES = + +# Command that replaces substitution variables with their values. +subst = sed \ + -e 's|@PACKAGE_VERSION[@]|$(PACKAGE_VERSION)|g' \ + -e 's|@PERL[@]|$(PERL)|g' \ + -e 's|@localstatedir[@]|$(localstatedir)|g' \ + -e 's|@runstatedir[@]|$(runstatedir)|g' \ + -e 's|@sysconfdir[@]|$(sysconfdir)|g' + +# Files that will be generated by passing their *.template file +# through $(subst). +subst_files = ddclient ddclient.conf + +EXTRA_DIST += $(subst_files:=.template) +CLEANFILES += $(subst_files) + +$(subst_files): Makefile + rm -f '$@' '$@'.tmp + in='$@'.template; \ + test -f "$${in}" || in='$(srcdir)/'$${in}; \ + $(subst) "$${in}" >'$@'.tmp && \ + { ! test -x "$${in}" || chmod +x '$@'.tmp; } + mv '$@'.tmp '$@' + +ddclient: $(srcdir)/ddclient.template +ddclient.conf: $(srcdir)/ddclient.conf.template + +bin_SCRIPTS = ddclient + +sysconf_DATA = ddclient.conf + +install-data-local: + $(MKDIR_P) '$(DESTDIR)$(localstatedir)'/cache/ddclient diff --git a/README.md b/README.md index 46ce76c..0d23a15 100644 --- a/README.md +++ b/README.md @@ -44,25 +44,47 @@ through github.com. Please check out http://ddclient.net ## REQUIREMENTS -- one or more accounts from one of the dynamic DNS services + * An account from a supported dynamic DNS service provider + * Perl v5.10.1 or later + * `IO::Socket::SSL` perl library for ssl-support + * `JSON::PP` perl library for JSON support + * `IO::Socket:INET6` perl library for ipv6-support + * Linux, macOS, or any other Unix-ish system + * An implementation of `make` (such as [GNU + Make](https://www.gnu.org/software/make/)) + * If you are installing from a clone of the Git repository, you will + also need [GNU Autoconf](https://www.gnu.org/software/autoconf/) + and [GNU Automake](https://www.gnu.org/software/automake/). -- Perl v5.10.1 or later - - `IO::Socket::SSL` perl library for ssl-support - - `JSON::PP` perl library for JSON support - - `IO::Socket:INET6` perl library for ipv6-support +## DOWNLOAD -- Linux or probably any common Unix system - -------------------------------------------------------------------------------- +See https://github.com/ddclient/ddclient/releases ## INSTALLATION - cp ddclient /usr/sbin/ - mkdir /etc/ddclient /var/cache/ddclient - cp sample-etc_ddclient.conf /etc/ddclient/ddclient.conf - vi /etc/ddclient/ddclient.conf + 1. Extract the distribution tarball (`.tar.gz` file) and `cd` into + the directory: -and change hostnames, logins, and passwords appropriately + ```shell + tar xvfa ddclient-3.9.1.tar.gz + cd ddclient-3.9.1 + ``` + + (If you are installing from a clone of the Git repository, you + must run `./autogen` before continuing to the next step.) + + 2. Run the following commands to build and install: + + ```shell + ./configure \ + --prefix=/usr \ + --sysconfdir=/etc/ddclient \ + --localstatedir=/var + make + sudo make install + ``` + + 3. Edit `/etc/ddclient/ddclient.conf`. ### systemd diff --git a/autogen b/autogen new file mode 100755 index 0000000..6b79b9f --- /dev/null +++ b/autogen @@ -0,0 +1,5 @@ +#!/bin/sh + +cd "${0%/*}" || exit 1 +mkdir -p m4 build-aux || exit 1 +exec autoreconf -fviW all diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..ceb5d38 --- /dev/null +++ b/configure.ac @@ -0,0 +1,23 @@ +AC_PREREQ([2.63]) +AC_INIT([ddclient], [3.9.1]) +AC_CONFIG_SRCDIR([ddclient.template]) +AC_CONFIG_AUX_DIR([build-aux]) +AC_CONFIG_MACRO_DIR([m4]) +AM_INIT_AUTOMAKE([1.11 -Wall -Werror foreign subdir-objects]) +AM_SILENT_RULES + +AC_PROG_MKDIR_P + +AX_WITH_PROG([PERL], perl) +AX_PROG_PERL_VERSION([5.10.1], [], + [AC_MSG_ERROR([Perl 5.10.1 or newer not found])]) +AC_SUBST([PERL]) + +m4_foreach_w([_m], [ + ], [AX_PROG_PERL_MODULES([_m], [], + [AC_MSG_ERROR([missing required Perl module _m])])]) + +AC_CONFIG_FILES([ + Makefile + ]) +AC_OUTPUT diff --git a/sample-etc_ddclient.conf b/ddclient.conf.template similarity index 99% rename from sample-etc_ddclient.conf rename to ddclient.conf.template index eea33f4..d0ede76 100644 --- a/sample-etc_ddclient.conf +++ b/ddclient.conf.template @@ -20,7 +20,7 @@ daemon=300 # check every 300 seconds syslog=yes # log update msgs to syslog mail=root # mail all msgs to root mail-failure=root # mail failed update msgs to root -pid=/var/run/ddclient.pid # record PID in file. +pid=@runstatedir@/ddclient.pid # record PID in file. ssl=yes # use ssl-support. Works with # ssl-library # postscript=script # run script after updating. The diff --git a/ddclient b/ddclient.template similarity index 99% rename from ddclient rename to ddclient.template index b2ee18d..1d63508 100755 --- a/ddclient +++ b/ddclient.template @@ -1,4 +1,4 @@ -#!/usr/bin/perl +#!@PERL@ ###################################################################### # # DDCLIENT - a Perl client for updating DynDNS information @@ -30,11 +30,27 @@ my $programd = $0; $programd =~ s%^.*/%%; my $program = $programd; $program =~ s/d$//; -my $now = time; -my $hostname = hostname(); -my $etc = ($program =~ /test/i) ? './' : '/etc/ddclient/'; -my $cachedir = ($program =~ /test/i) ? './' : '/var/cache/ddclient/'; -my $savedir = ($program =~ /test/i) ? 'URL/' : '/tmp/'; +my $now = time; +my $hostname = hostname(); + +# subst_var(subst, default) returns subst unless it looks like @foo@ in which case it returns +# default. The @foo@ strings are expected to be replaced by make; this function makes it possible +# to run this file as a Perl script before those substitutions are made. +sub subst_var { + my ($subst, $default) = @_; + return $default if $subst =~ /^@\w+@$/a; + return $subst; +} + +my $etc = subst_var('@sysconfdir@', '/etc/ddclient'); +my $cachedir = subst_var('@localstatedir@', '/var') . '/cache/ddclient'; +my $savedir = '/tmp'; +if ($program =~ /test/i) { + $etc = '.'; + $cachedir = '.'; + $savedir = 'URL'; +} + my $msgs = ''; my $last_msgs = ''; @@ -321,8 +337,8 @@ my %variables = ( 'global-defaults' => { 'daemon' => setv(T_DELAY, 0, 0, $daemon_default, interval('60s')), 'foreground' => setv(T_BOOL, 0, 0, 0, undef), - 'file' => setv(T_FILE, 0, 0, "$etc$program.conf", undef), - 'cache' => setv(T_FILE, 0, 0, "$cachedir$program.cache", undef), + 'file' => setv(T_FILE, 0, 0, "$etc/$program.conf", undef), + 'cache' => setv(T_FILE, 0, 0, "$cachedir/$program.cache", undef), 'pid' => setv(T_FILE, 0, 0, "", undef), 'proxy' => setv(T_FQDNP, 0, 0, '', undef), 'protocol' => setv(T_PROTO, 0, 0, 'dyndns2', undef), @@ -2157,9 +2173,9 @@ sub geturl { my $filename = "$server/$url"; $filename =~ s|/|%2F|g; if (opt('exec')) { - $reply = save_file("${savedir}$filename", $reply, 'unique'); + $reply = save_file("$savedir/$filename", $reply, 'unique'); } else { - $reply = load_file("${savedir}$filename"); + $reply = load_file("$savedir/$filename"); } } diff --git a/m4/ax_compare_version.m4 b/m4/ax_compare_version.m4 new file mode 100644 index 0000000..ffb4997 --- /dev/null +++ b/m4/ax_compare_version.m4 @@ -0,0 +1,177 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_compare_version.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) +# +# DESCRIPTION +# +# This macro compares two version strings. Due to the various number of +# minor-version numbers that can exist, and the fact that string +# comparisons are not compatible with numeric comparisons, this is not +# necessarily trivial to do in a autoconf script. This macro makes doing +# these comparisons easy. +# +# The six basic comparisons are available, as well as checking equality +# limited to a certain number of minor-version levels. +# +# The operator OP determines what type of comparison to do, and can be one +# of: +# +# eq - equal (test A == B) +# ne - not equal (test A != B) +# le - less than or equal (test A <= B) +# ge - greater than or equal (test A >= B) +# lt - less than (test A < B) +# gt - greater than (test A > B) +# +# Additionally, the eq and ne operator can have a number after it to limit +# the test to that number of minor versions. +# +# eq0 - equal up to the length of the shorter version +# ne0 - not equal up to the length of the shorter version +# eqN - equal up to N sub-version levels +# neN - not equal up to N sub-version levels +# +# When the condition is true, shell commands ACTION-IF-TRUE are run, +# otherwise shell commands ACTION-IF-FALSE are run. The environment +# variable 'ax_compare_version' is always set to either 'true' or 'false' +# as well. +# +# Examples: +# +# AX_COMPARE_VERSION([3.15.7],[lt],[3.15.8]) +# AX_COMPARE_VERSION([3.15],[lt],[3.15.8]) +# +# would both be true. +# +# AX_COMPARE_VERSION([3.15.7],[eq],[3.15.8]) +# AX_COMPARE_VERSION([3.15],[gt],[3.15.8]) +# +# would both be false. +# +# AX_COMPARE_VERSION([3.15.7],[eq2],[3.15.8]) +# +# would be true because it is only comparing two minor versions. +# +# AX_COMPARE_VERSION([3.15.7],[eq0],[3.15]) +# +# would be true because it is only comparing the lesser number of minor +# versions of the two values. +# +# Note: The characters that separate the version numbers do not matter. An +# empty string is the same as version 0. OP is evaluated by autoconf, not +# configure, so must be a string, not a variable. +# +# The author would like to acknowledge Guido Draheim whose advice about +# the m4_case and m4_ifvaln functions make this macro only include the +# portions necessary to perform the specific comparison specified by the +# OP argument in the final configure script. +# +# LICENSE +# +# Copyright (c) 2008 Tim Toolan +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 13 + +dnl ######################################################################### +AC_DEFUN([AX_COMPARE_VERSION], [ + AC_REQUIRE([AC_PROG_AWK]) + + # Used to indicate true or false condition + ax_compare_version=false + + # Convert the two version strings to be compared into a format that + # allows a simple string comparison. The end result is that a version + # string of the form 1.12.5-r617 will be converted to the form + # 0001001200050617. In other words, each number is zero padded to four + # digits, and non digits are removed. + AS_VAR_PUSHDEF([A],[ax_compare_version_A]) + A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \ + -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \ + -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \ + -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \ + -e 's/[[^0-9]]//g'` + + AS_VAR_PUSHDEF([B],[ax_compare_version_B]) + B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \ + -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \ + -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \ + -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \ + -e 's/[[^0-9]]//g'` + + dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary + dnl # then the first line is used to determine if the condition is true. + dnl # The sed right after the echo is to remove any indented white space. + m4_case(m4_tolower($2), + [lt],[ + ax_compare_version=`echo "x$A +x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"` + ], + [gt],[ + ax_compare_version=`echo "x$A +x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"` + ], + [le],[ + ax_compare_version=`echo "x$A +x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"` + ], + [ge],[ + ax_compare_version=`echo "x$A +x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"` + ],[ + dnl Split the operator from the subversion count if present. + m4_bmatch(m4_substr($2,2), + [0],[ + # A count of zero means use the length of the shorter version. + # Determine the number of characters in A and B. + ax_compare_version_len_A=`echo "$A" | $AWK '{print(length)}'` + ax_compare_version_len_B=`echo "$B" | $AWK '{print(length)}'` + + # Set A to no more than B's length and B to no more than A's length. + A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"` + B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"` + ], + [[0-9]+],[ + # A count greater than zero means use only that many subversions + A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"` + B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"` + ], + [.+],[ + AC_WARNING( + [invalid OP numeric parameter: $2]) + ],[]) + + # Pad zeros at end of numbers to make same length. + ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`" + B="$B`echo $A | sed 's/./0/g'`" + A="$ax_compare_version_tmp_A" + + # Check for equality or inequality as necessary. + m4_case(m4_tolower(m4_substr($2,0,2)), + [eq],[ + test "x$A" = "x$B" && ax_compare_version=true + ], + [ne],[ + test "x$A" != "x$B" && ax_compare_version=true + ],[ + AC_WARNING([invalid OP parameter: $2]) + ]) + ]) + + AS_VAR_POPDEF([A])dnl + AS_VAR_POPDEF([B])dnl + + dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE. + if test "$ax_compare_version" = "true" ; then + m4_ifvaln([$4],[$4],[:])dnl + m4_ifvaln([$5],[else $5])dnl + fi +]) dnl AX_COMPARE_VERSION diff --git a/m4/ax_prog_perl_modules.m4 b/m4/ax_prog_perl_modules.m4 new file mode 100644 index 0000000..70b3230 --- /dev/null +++ b/m4/ax_prog_perl_modules.m4 @@ -0,0 +1,77 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_prog_perl_modules.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PROG_PERL_MODULES([MODULES], [ACTION-IF-TRUE], [ACTION-IF-FALSE]) +# +# DESCRIPTION +# +# Checks to see if the given perl modules are available. If true the shell +# commands in ACTION-IF-TRUE are executed. If not the shell commands in +# ACTION-IF-FALSE are run. Note if $PERL is not set (for example by +# calling AC_CHECK_PROG, or AC_PATH_PROG), AC_CHECK_PROG(PERL, perl, perl) +# will be run. +# +# MODULES is a space separated list of module names. To check for a +# minimum version of a module, append the version number to the module +# name, separated by an equals sign. +# +# Example: +# +# AX_PROG_PERL_MODULES( Text::Wrap Net::LDAP=1.0.3, , +# AC_MSG_WARN(Need some Perl modules) +# +# LICENSE +# +# Copyright (c) 2009 Dean Povey +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 8 + +AU_ALIAS([AC_PROG_PERL_MODULES], [AX_PROG_PERL_MODULES]) +AC_DEFUN([AX_PROG_PERL_MODULES],[dnl + +m4_define([ax_perl_modules]) +m4_foreach([ax_perl_module], m4_split(m4_normalize([$1])), + [ + m4_append([ax_perl_modules], + [']m4_bpatsubst(ax_perl_module,=,[ ])[' ]) + ]) + +# Make sure we have perl +if test -z "$PERL"; then +AC_CHECK_PROG(PERL,perl,perl) +fi + +if test "x$PERL" != x; then + ax_perl_modules_failed=0 + for ax_perl_module in ax_perl_modules; do + AC_MSG_CHECKING(for perl module $ax_perl_module) + + # Would be nice to log result here, but can't rely on autoconf internals + $PERL -e "use $ax_perl_module; exit" > /dev/null 2>&1 + if test $? -ne 0; then + AC_MSG_RESULT(no); + ax_perl_modules_failed=1 + else + AC_MSG_RESULT(ok); + fi + done + + # Run optional shell commands + if test "$ax_perl_modules_failed" = 0; then + : + $2 + else + : + $3 + fi +else + AC_MSG_WARN(could not find perl) +fi])dnl diff --git a/m4/ax_prog_perl_version.m4 b/m4/ax_prog_perl_version.m4 new file mode 100644 index 0000000..46a8a4e --- /dev/null +++ b/m4/ax_prog_perl_version.m4 @@ -0,0 +1,70 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_prog_perl_version.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PROG_PERL_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE]) +# +# DESCRIPTION +# +# Makes sure that perl supports the version indicated. If true the shell +# commands in ACTION-IF-TRUE are executed. If not the shell commands in +# ACTION-IF-FALSE are run. Note if $PERL is not set (for example by +# running AC_CHECK_PROG or AC_PATH_PROG) the macro will fail. +# +# Example: +# +# AC_PATH_PROG([PERL],[perl]) +# AX_PROG_PERL_VERSION([5.8.0],[ ... ],[ ... ]) +# +# This will check to make sure that the perl you have supports at least +# version 5.8.0. +# +# NOTE: This macro uses the $PERL variable to perform the check. +# AX_WITH_PERL can be used to set that variable prior to running this +# macro. The $PERL_VERSION variable will be valorized with the detected +# version. +# +# LICENSE +# +# Copyright (c) 2009 Francesco Salvestrini +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 13 + +AC_DEFUN([AX_PROG_PERL_VERSION],[ + AC_REQUIRE([AC_PROG_SED]) + AC_REQUIRE([AC_PROG_GREP]) + + AS_IF([test -n "$PERL"],[ + ax_perl_version="$1" + + AC_MSG_CHECKING([for perl version]) + changequote(<<,>>) + perl_version=`$PERL --version 2>&1 \ + | $SED -n -e '/This is perl/b inspect +b +: inspect +s/.* (\{0,1\}v\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\} .*/\1/;p'` + changequote([,]) + AC_MSG_RESULT($perl_version) + + AC_SUBST([PERL_VERSION],[$perl_version]) + + AX_COMPARE_VERSION([$ax_perl_version],[le],[$perl_version],[ + : + $2 + ],[ + : + $3 + ]) + ],[ + AC_MSG_WARN([could not find the perl interpreter]) + $3 + ]) +]) diff --git a/m4/ax_with_prog.m4 b/m4/ax_with_prog.m4 new file mode 100644 index 0000000..b3a881c --- /dev/null +++ b/m4/ax_with_prog.m4 @@ -0,0 +1,70 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_with_prog.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_WITH_PROG([VARIABLE],[program],[VALUE-IF-NOT-FOUND],[PATH]) +# +# DESCRIPTION +# +# Locates an installed program binary, placing the result in the precious +# variable VARIABLE. Accepts a present VARIABLE, then --with-program, and +# failing that searches for program in the given path (which defaults to +# the system path). If program is found, VARIABLE is set to the full path +# of the binary; if it is not found VARIABLE is set to VALUE-IF-NOT-FOUND +# if provided, unchanged otherwise. +# +# A typical example could be the following one: +# +# AX_WITH_PROG(PERL,perl) +# +# NOTE: This macro is based upon the original AX_WITH_PYTHON macro from +# Dustin J. Mitchell . +# +# LICENSE +# +# Copyright (c) 2008 Francesco Salvestrini +# Copyright (c) 2008 Dustin J. Mitchell +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 17 + +AC_DEFUN([AX_WITH_PROG],[ + AC_PREREQ([2.61]) + + pushdef([VARIABLE],$1) + pushdef([EXECUTABLE],$2) + pushdef([VALUE_IF_NOT_FOUND],$3) + pushdef([PATH_PROG],$4) + + AC_ARG_VAR(VARIABLE,Absolute path to EXECUTABLE executable) + + AS_IF(test -z "$VARIABLE",[ + AC_MSG_CHECKING(whether EXECUTABLE executable path has been provided) + AC_ARG_WITH(EXECUTABLE,AS_HELP_STRING([--with-EXECUTABLE=[[[PATH]]]],absolute path to EXECUTABLE executable), [ + AS_IF([test "$withval" != yes && test "$withval" != no],[ + VARIABLE="$withval" + AC_MSG_RESULT($VARIABLE) + ],[ + VARIABLE="" + AC_MSG_RESULT([no]) + AS_IF([test "$withval" != no], [ + AC_PATH_PROG([]VARIABLE[],[]EXECUTABLE[],[]VALUE_IF_NOT_FOUND[],[]PATH_PROG[]) + ]) + ]) + ],[ + AC_MSG_RESULT([no]) + AC_PATH_PROG([]VARIABLE[],[]EXECUTABLE[],[]VALUE_IF_NOT_FOUND[],[]PATH_PROG[]) + ]) + ]) + + popdef([PATH_PROG]) + popdef([VALUE_IF_NOT_FOUND]) + popdef([EXECUTABLE]) + popdef([VARIABLE]) +])