Changes the biew-610 configure script to use portable test constructs. See the
Autoconf manual <URL:https://www.gnu.org/software/autoconf/manual/html_node/
Limitations-of-Builtins.html#index-g_t_0040command_007btest_007d-1725> for
explanations.

 –nico


diff -Naur biew-610.orig/configure biew-610/configure
--- biew-610.orig/configure	2009-11-13 14:52:36.000000000 +0000
+++ biew-610/configure	2011-02-24 09:44:10.000000000 +0000
@@ -171,7 +171,7 @@
 # 1st: print out help
 
 for parm in "$@" ; do
-  if test "$parm" = "--help" || test "$parm" = "-help" || test "$parm" = "-h" ; then
+  if test "X$parm" = "X--help" || test "X$parm" = "X-help" || test "X$parm" = "X-h" ; then
     cat << EOF
 
 Usage: $0 [OPTIONS]...
@@ -235,7 +235,7 @@
 _cp=cp
 _libext=a
 _libprefix=lib
-test "$CC" && _cc="$CC"
+test "X$CC" != X && _cc="$CC"
 _prefix="/usr/local"
 _datadir=
 _libdir=
@@ -340,11 +340,11 @@
     ;;
   esac
 done
-test -z "$_datadir" && _datadir=$_prefix"/share/biew"
-test -z "$_libdir" && _libdir=$_prefix"/lib/biew"
+test "X$_datadir" = X && _datadir=$_prefix"/share/biew"
+test "X$_libdir" = X && _libdir=$_prefix"/lib/biew"
 
 for I in "$TMPDIR" "$TEMPDIR" "/tmp" ; do
-  test "$I" && break
+  test "X$I" != X && break
 done
 
 TMPLOG="config.log"
@@ -357,8 +357,8 @@
 _tee="tee -a $TMPLOG"
 
 echocheck "architecture"
-if test "$_target_arch" = auto ; then
-  if test -z "$host_arch" ; then
+if test "X$_target_arch" = Xauto ; then
+  if test "X$host_arch" = X ; then
   host_arch=`( uname -p ) 2>&1`
   log "uname -p :" "$host_arch"
   case "$host_arch" in
@@ -416,8 +416,8 @@
 x86_64  && _bitness=64
 
 echocheck "target OS"
-if test "$_target_system" = auto ; then
-  if test -z "$system_name" ; then
+if test "X$_target_system" = Xauto ; then
+  if test "X$system_name" = X ; then
     # OS name
     system_name=`uname -s`
     log "uname -s :" "$system_name"
@@ -461,8 +461,8 @@
   fi
 fi
 
-if test "$_target_system" = auto ; then
-  if test -z "$system_name" ; then
+if test "X$_target_system" = Xauto ; then
+  if test "X$system_name" = X ; then
     # OS name
     system_name=`/bin/sh --version 2>&1 | sed -n 's/^.*\([(]\)./\1/p'`
     log "/bin/sh --version:" "$system_name"
@@ -549,7 +549,7 @@
     ;;
 esac
 
-if test -z "$_x11incdir" ; then
+if test "X$_x11incdir" = X ; then
 echocheck "X11 headers"
   for I in /usr/include /usr/X11R6/include /usr/X11/include /usr/openwin/include ; do
     if test -d "$I/X11" ; then
@@ -559,11 +559,11 @@
     fi
   done
 fi
-if test -z "$_x11incdir" ; then
+if test "X$_x11incdir" = X ; then
     echores "x11inc not found"
 fi
 
-if test -z "$_x11libdir" ; then
+if test "X$_x11libdir" = X ; then
 echocheck "X11 libs"
   for I in /usr/X11R6/lib /usr/X11/lib /usr/lib32 /usr/openwin/lib ; do
     if test -d "$I" ; then
@@ -573,24 +573,24 @@
     fi
   done
 fi
-if test -z "$_x11libdir" ; then
+if test "X$_x11libdir" = X ; then
     echores "x11lib not found"
 fi
 
-test -z "$_debug" && _osldef="-s $_osldef" || _cdefos="-finline-limit-5 $_cdefos"
-if test "$_profile" -o "$_debug" -o "$_gcov"; then
+test "X$_debug" = X && _osldef="-s $_osldef" || _cdefos="-finline-limit-5 $_cdefos"
+if test "X$_profile" != X || test "X$_debug" != X || test "X$_gcov" != X ; then
   _cdefos="-W -Wall -O2 -fno-builtin $_debug $_profile $_gcov $_cdefos"
   _osldef="$_debug $_profile $_osldef"
-elif test -z "$CFLAGS" ; then
+elif test "X$CFLAGS" = X ; then
     _cdefos="-DNDEBUG=1 -O2 -ffast-math -fomit-frame-pointer $_cdefos"
     x86 && _cdefos="-mmmx -msse $_cdefos"
 else
     _cdefos="-DNDEBUG=1 $CFLAGS $_cdefos"
 fi
-test -n "$LDFLAGS" && _osldef="$LDFLAGS $_osldef"
-test -n "$LIBS" && _osldef="$LIBS $_osldef"
+test "X$LDFLAGS" != X && _osldef="$LDFLAGS $_osldef"
+test "X$LIBS" != X && _osldef="$LIBS $_osldef"
 
-if test "$_target_system" = dos ; then
+if test "X$_target_system" = Xdos ; then
 # disable cc_check call for DJGPP due bugs in bash
 _cdefos="-D__HAVE_PRAGMA_PACK__=1 $_cdefos"
 else
@@ -668,10 +668,10 @@
 	_curseslib=
 	disable _curses
 	cc_check -lcurses && _curseslib="-lcurses"
-	if test -z "$_curseslib" ; then
+	if test "X$_curseslib" = X ; then
 	    cc_check -lncurses && _curseslib="-lncurses"
 	fi
-	if test -n "$_curseslib" ; then
+	if test "X$_curseslib" != X ; then
 	    enable _curses
 	    _cdefos="-D_CURSES_ -D__OS_NAME__='\"Unix/Curses\"' $_cdefos"
 	    _oslibs="$_curseslib $_oslibs"
@@ -711,10 +711,10 @@
 enabled sys_resource_h && _cdefos="-DHAVE_SYS_RESOURCE=1 $_cdefos"
 echores "$sys_resource_h"
 
-if test -z "$_x11libdir" ; then
+if test "X$_x11libdir" = X ; then
  _cdefos="$_cdefos"
 else
-  if test -z "$_x11incdir" ; then
+  if test "X$_x11incdir" = X ; then
    _cdefos="$_cdefos"
   else
     _cdefos="-DHAVE_X11 $_cdefos"
@@ -738,7 +738,7 @@
 fi
 
 # Checking for INSTALL
-if test -z $_install
+if test "X$_install" = X
 then
     _install="install"
     $_install --version 1>/dev/null 2>/dev/null || _install=""