provide a common PATH_SEPARATOR check method which is required by

upcomming work to support the broadest range of Autoconf versions

6 files changed, 197 insertions, 4 deletions

diff --git a/ares/configure.ac b/ares/configure.ac
index 6d5096898..ce66b8530 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -14,6 +14,8 @@ CARES_CHECK_OPTION_DEBUG
 CARES_CHECK_OPTION_OPTIMIZE
 CARES_CHECK_OPTION_WARNINGS
 
+CARES_CHECK_PATH_SEPARATOR
+
 dnl SED is mandatory for configure process and libtool.
 dnl Set it now, allowing it to be changed later.
 AC_PATH_PROG([SED], [sed], [not_found],
diff --git a/ares/m4/cares-override.m4 b/ares/m4/cares-override.m4
index 9377adba9..ea5b55362 100644
--- a/ares/m4/cares-override.m4
+++ b/ares/m4/cares-override.m4
@@ -3,7 +3,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 1
+# serial 2
 
 dnl CARES_OVERRIDE_AUTOCONF
 dnl -------------------------------------------------
@@ -39,7 +39,8 @@ m4_define([AC_LANG_PROGRAM(C)],
 int main (void)
 {
 $2
-; return 0;
+ ;
+ return 0;
 }])
 
 dnl Override Autoconf's AC_LANG_CALL (C)
@@ -84,4 +85,19 @@ choke me
 #endif
 ], [return $1 ();])])
 
+dnl Override Autoconf's PATH_SEPARATOR check
+dnl -------------------------------------------------
+dnl This is done to ensure that the same check is
+dnl used across different Autoconf versions and to
+dnl allow us to use this macro early enough in the
+dnl configure script.
+
+m4_define([_AS_PATH_SEPARATOR_PREPARE],
+[CARES_CHECK_PATH_SEPARATOR
+m4_define([$0],[])])
+
+m4_define([_LT_AC_LIBTOOL_SYS_PATH_SEPARATOR],
+[CARES_CHECK_PATH_SEPARATOR
+m4_define([$0],[])])
+
 
diff --git a/ares/m4/cares-system.m4 b/ares/m4/cares-system.m4
new file mode 100644
index 000000000..278140160
--- /dev/null
+++ b/ares/m4/cares-system.m4
@@ -0,0 +1,76 @@
+#***************************************************************************
+# $Id$
+#
+# Copyright (C) 2008 by Daniel Stenberg et al
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted, provided
+# that the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission.  M.I.T. makes no representations about the
+# suitability of this software for any purpose.  It is provided "as is"
+# without express or implied warranty.
+#
+#***************************************************************************
+
+# File version for 'aclocal' use. Keep it a single number.
+# serial 1
+
+
+dnl CARES_CHECK_PATH_SEPARATOR
+dnl -------------------------------------------------
+dnl Check and compute the path separator for us. This
+dnl path separator is the symbol used to diferentiate
+dnl or separate paths inside the PATH environment var.
+
+AC_DEFUN([CARES_CHECK_PATH_SEPARATOR], [
+  if test -z "$cares_cv_PATH_SEPARATOR"; then
+    if test -z "$PATH"; then
+      AC_MSG_ERROR([PATH not set. Cannot continue without PATH being set.])
+    fi
+    dnl Directory count in PATH when using a colon separator.
+    tst_dirs_col=0
+    tst_save_IFS=$IFS; IFS=':'
+    for tst_dir in $PATH; do
+      IFS=$tst_save_IFS
+      test -d "$tst_dir" && tst_dirs_col=`expr $tst_dirs_col + 1`
+    done
+    IFS=$tst_save_IFS
+    dnl Directory count in PATH when using a semicolon separator.
+    tst_dirs_sem=0
+    tst_save_IFS=$IFS; IFS=';'
+    for tst_dir in $PATH; do
+      IFS=$tst_save_IFS
+      test -d "$tst_dir" && tst_dirs_sem=`expr $tst_dirs_sem + 1`
+    done
+    IFS=$tst_save_IFS
+    if test $tst_dirs_sem -eq $tst_dirs_col; then
+      dnl When both counting methods give the same result we do not want to
+      dnl chose one over the other, and consider auto-detection not possible.
+      if test -z "$PATH_SEPARATOR"; then
+        dnl Stop dead until user provides PATH_SEPARATOR definition.
+        AC_MSG_ERROR([PATH_SEPARATOR not set. Cannot continue without it.])
+      fi
+    else
+      dnl Separator with the greater directory count is the auto-detected one.
+      if test $tst_dirs_sem -gt $tst_dirs_col; then
+        tst_auto_separator=';'
+        PATH_SEPARATOR=';'
+      else
+        tst_auto_separator=':'
+        PATH_SEPARATOR=':'
+      fi
+      if test -z "$PATH_SEPARATOR"; then
+        dnl Simply use the auto-detected one when not already set.
+        PATH_SEPARATOR="$tst_auto_separator"
+      fi
+    fi
+    cares_cv_PATH_SEPARATOR="$PATH_SEPARATOR"
+  fi
+  AC_SUBST([PATH_SEPARATOR])
+  AC_SUBST([PATH])
+])
+
+
diff --git a/configure.ac b/configure.ac
index fe9d80d73..f98bded54 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,6 +42,8 @@ CURL_CHECK_OPTION_DEBUG
 CURL_CHECK_OPTION_OPTIMIZE
 CURL_CHECK_OPTION_WARNINGS
 
+CURL_CHECK_PATH_SEPARATOR
+
 dnl SED is mandatory for configure process and libtool.
 dnl Set it now, allowing it to be changed later.
 AC_PATH_PROG([SED], [sed], [not_found],
diff --git a/m4/curl-override.m4 b/m4/curl-override.m4
index 6770088dd..4092d9ab5 100644
--- a/m4/curl-override.m4
+++ b/m4/curl-override.m4
@@ -3,7 +3,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 1
+# serial 2
 
 dnl CURL_OVERRIDE_AUTOCONF
 dnl -------------------------------------------------
@@ -39,7 +39,8 @@ m4_define([AC_LANG_PROGRAM(C)],
 int main (void)
 {
 $2
-; return 0;
+ ;
+ return 0;
 }])
 
 dnl Override Autoconf's AC_LANG_CALL (C)
@@ -84,4 +85,19 @@ choke me
 #endif
 ], [return $1 ();])])
 
+dnl Override Autoconf's PATH_SEPARATOR check
+dnl -------------------------------------------------
+dnl This is done to ensure that the same check is
+dnl used across different Autoconf versions and to
+dnl allow us to use this macro early enough in the
+dnl configure script.
+
+m4_define([_AS_PATH_SEPARATOR_PREPARE],
+[CURL_CHECK_PATH_SEPARATOR
+m4_define([$0],[])])
+
+m4_define([_LT_AC_LIBTOOL_SYS_PATH_SEPARATOR],
+[CURL_CHECK_PATH_SEPARATOR
+m4_define([$0],[])])
+
 
diff --git a/m4/curl-system.m4 b/m4/curl-system.m4
new file mode 100644
index 000000000..57d4cccb6
--- /dev/null
+++ b/m4/curl-system.m4
@@ -0,0 +1,81 @@
+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at http://curl.haxx.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+# $Id$
+#***************************************************************************
+
+# File version for 'aclocal' use. Keep it a single number.
+# serial 1
+
+
+dnl CURL_CHECK_PATH_SEPARATOR
+dnl -------------------------------------------------
+dnl Check and compute the path separator for us. This
+dnl path separator is the symbol used to diferentiate
+dnl or separate paths inside the PATH environment var.
+
+AC_DEFUN([CURL_CHECK_PATH_SEPARATOR], [
+  if test -z "$curl_cv_PATH_SEPARATOR"; then
+    if test -z "$PATH"; then
+      AC_MSG_ERROR([PATH not set. Cannot continue without PATH being set.])
+    fi
+    dnl Directory count in PATH when using a colon separator.
+    tst_dirs_col=0
+    tst_save_IFS=$IFS; IFS=':'
+    for tst_dir in $PATH; do
+      IFS=$tst_save_IFS
+      test -d "$tst_dir" && tst_dirs_col=`expr $tst_dirs_col + 1`
+    done
+    IFS=$tst_save_IFS
+    dnl Directory count in PATH when using a semicolon separator.
+    tst_dirs_sem=0
+    tst_save_IFS=$IFS; IFS=';'
+    for tst_dir in $PATH; do
+      IFS=$tst_save_IFS
+      test -d "$tst_dir" && tst_dirs_sem=`expr $tst_dirs_sem + 1`
+    done
+    IFS=$tst_save_IFS
+    if test $tst_dirs_sem -eq $tst_dirs_col; then
+      dnl When both counting methods give the same result we do not want to
+      dnl chose one over the other, and consider auto-detection not possible.
+      if test -z "$PATH_SEPARATOR"; then
+        dnl Stop dead until user provides PATH_SEPARATOR definition.
+        AC_MSG_ERROR([PATH_SEPARATOR not set. Cannot continue without it.])
+      fi
+    else
+      dnl Separator with the greater directory count is the auto-detected one.
+      if test $tst_dirs_sem -gt $tst_dirs_col; then
+        tst_auto_separator=';'
+        PATH_SEPARATOR=';'
+      else
+        tst_auto_separator=':'
+        PATH_SEPARATOR=':'
+      fi
+      if test -z "$PATH_SEPARATOR"; then
+        dnl Simply use the auto-detected one when not already set.
+        PATH_SEPARATOR="$tst_auto_separator"
+      fi
+    fi
+    curl_cv_PATH_SEPARATOR="$PATH_SEPARATOR"
+  fi
+  AC_SUBST([PATH_SEPARATOR])
+  AC_SUBST([PATH])
+])
+