So, this patch replaces (removes?) the "--with-<executable>-path" configure 
options with environment variables, right?  For example, if one has "ifconfig" 
in a non-standard place, he can set the IFCONFIG environment variable and the 
build will find it. Did I understand this correctly?

I don't know autotools well enough to give this one an ACK at this point. That 
said, the patch does clean up configure.ac a lot, and cleanups are always nice 
:).

-- 
Samuli Seppänen
Community Manager
OpenVPN Technologies, Inc

irc freenode net: mattock


> Signed-off-by: Alon Bar-Lev <alon.bar...@gmail.com>
> ---
>  configure.ac |   66 ++++++++++++++++++++++++---------------------------------
>  1 files changed, 28 insertions(+), 38 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
> index 6b5cf71..ed98464 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -267,37 +267,6 @@ AC_ARG_WITH(
>  )
>  
>  AC_ARG_WITH(
> -     [ifconfig-path],
> -     [AS_HELP_STRING([--with-ifconfig-path=PATH], [Path to ifconfig tool])],
> -     [IFCONFIG="$withval"],
> -     [AC_PATH_PROG([IFCONFIG], [ifconfig], [ifconfig], 
> [$PATH:/usr/local/sbin:/usr/sbin:/sbin])]
> -)
> -AC_DEFINE_UNQUOTED([IFCONFIG_PATH], ["$IFCONFIG"], [Path to ifconfig tool])
> -
> -AC_ARG_WITH(
> -     [iproute-path],
> -     [AS_HELP_STRING([--with-iproute-path=PATH], [Path to iproute tool])],
> -     [IPROUTE="$withval"],
> -     [AC_PATH_PROG([IPROUTE], [ip], [ip], 
> [$PATH:/usr/local/sbin:/usr/sbin:/sbin])]
> -)
> -AC_DEFINE_UNQUOTED([IPROUTE_PATH], ["$IPROUTE"], [Path to iproute tool])
> -
> -AC_ARG_WITH([route-path],
> -   [AS_HELP_STRING([--with-route-path=PATH], [Path to route tool])],
> -   [ROUTE="$withval"],
> -   [AC_PATH_PROG([ROUTE], [route], [route], 
> [$PATH:/usr/local/sbin:/usr/sbin:/sbin])]
> -)
> -AC_DEFINE_UNQUOTED([ROUTE_PATH], ["$ROUTE"], [Path to route tool])
> -
> -AC_ARG_WITH(
> -     [netstat-path],
> -     [AS_HELP_STRING([--with-netstat-path=PATH], [Path to netstat tool])],
> -     [NETSTAT="$withval"],
> -     [AC_PATH_PROG([NETSTAT], [netstat], [netstat], 
> [$PATH:/usr/local/sbin:/usr/sbin:/sbin:/etc])]
> -)
> -AC_DEFINE_UNQUOTED([NETSTAT_PATH], ["$NETSTAT"], [Path to netstat tool])
> -
> -AC_ARG_WITH(
>       [mem-check],
>       [AS_HELP_STRING([--with-mem-check=TYPE], [build with debug memory 
> checking, TYPE=dmalloc|valgrind|ssl])],
>       [
> @@ -370,6 +339,20 @@ AC_PROG_INSTALL
>  AC_PROG_LN_S
>  AC_PROG_MAKE_SET
>  
> +AC_ARG_VAR([IFCONFIG], [full path to ipconfig utility])
> +AC_ARG_VAR([ROUTE], [full path to route utility])
> +AC_ARG_VAR([IPROUTE], [full path to ip utility])
> +AC_ARG_VAR([NETSTAT], [path to netstat utility]) # tests
> +AC_ARG_VAR([MAN2HTML], [path to man2html utility])
> +AC_PATH_PROGS([IFCONFIG], [ifconfig],, 
> [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
> +AC_PATH_PROGS([ROUTE], [route],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
> +AC_PATH_PROGS([IPROUTE], [ip],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
> +AC_CHECK_PROGS([NETSTAT], [netstat], [netstat], 
> [$PATH:/usr/local/sbin:/usr/sbin:/sbin:/etc]) # tests
> +AC_CHECK_PROGS([MAN2HTML], [man2html])
> +AC_DEFINE_UNQUOTED([IFCONFIG_PATH], ["$IFCONFIG"], [Path to ifconfig tool])
> +AC_DEFINE_UNQUOTED([IPROUTE_PATH], ["$IPROUTE"], [Path to iproute tool])
> +AC_DEFINE_UNQUOTED([ROUTE_PATH], ["$ROUTE"], [Path to route tool])
> +
>  #
>  # Libtool
>  #
> @@ -386,12 +369,6 @@ ifdef(
>       ]
>  )
>  
> -if test "${WIN32}" = "yes"; then
> -     AC_ARG_VAR([MAN2HTML], [man2html utility])
> -     AC_CHECK_PROGS([MAN2HTML], [man2html])
> -     test -z "${MAN2HTML}" && AC_MSG_ERROR([man2html is required for win32])
> -fi
> -
>  AC_C_CONST
>  AC_C_INLINE
>  AC_C_VOLATILE
> @@ -920,7 +897,16 @@ test "${enable_pf}" = "yes" && AC_DEFINE([ENABLE_PF], 
> [1], [Enable internal pack
>  test "${enable_strict_options}" = "yes" && 
> AC_DEFINE([ENABLE_STRICT_OPTIONS_CHECK], [1], [Enable strict options check 
> between peers])
>  test "${enable_password_save}" = "yes" && AC_DEFINE([ENABLE_PASSWORD_SAVE], 
> [1], [Allow --askpass and --auth-user-pass passwords to be read from a file])
>  test "${enable_systemd}" = "yes" && AC_DEFINE([ENABLE_SYSTEMD], [1], [Enable 
> systemd support])
> -test "${enable_iproute2}" = "yes" && AC_DEFINE([ENABLE_IPROUTE], [1], 
> [enable iproute2 support])
> +
> +if test "${enable_iproute2}" = "yes"; then
> +     test -z "${IPROUTE}" && AC_MSG_ERROR([ip utility is required but 
> missing])
> +     AC_DEFINE([ENABLE_IPROUTE], [1], [enable iproute2 support])
> +else
> +     if test "${WIN32}" != "yes"; then
> +             test -z "${ROUTE}" && AC_MSG_ERROR([route utility is required 
> but missing])
> +             test -z "${IFCONFIG}" && AC_MSG_ERROR([ifconfig utility is 
> required but missing])
> +     fi
> +fi
>  
>  if test "${enable_pedantic}" = "yes"; then
>       enable_strict="yes"
> @@ -930,6 +916,10 @@ if test "${enable_strict}" = "yes"; then
>       CFLAGS="${CFLAGS} -Wall -Wno-unused-parameter -Wno-unused-function"
>  fi
>  
> +if test "${WIN32}" = "yes"; then
> +     test -z "${MAN2HTML}" && AC_MSG_ERROR([man2html is required for win32])
> +fi
> +
>  CONFIGURE_DEFINES="`set | grep '^enable_.*=' ; set | grep '^with_.*='`"
>  AC_DEFINE_UNQUOTED([CONFIGURE_DEFINES], ["`echo ${CONFIGURE_DEFINES}`"], 
> [Configuration settings])
>  


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