Merge branch 'maint-r14' of super:otp into maint-r14

9 files changed, 221 insertions, 99 deletions

diff --git a/erts/etc/common/erlexec.c b/erts/etc/common/erlexec.c
index 60b3af7db7..7e04724f5a 100644
--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -394,6 +394,7 @@ int main(int argc, char **argv)
     int print_args_exit = 0;
     int print_qouted_cmd_exit = 0;
     erts_cpu_info_t *cpuinfo = NULL;
+    char* emu_name;
 
 #ifdef __WIN32__
     this_module_handle = module;
@@ -566,6 +567,7 @@ int main(int argc, char **argv)
 	    usage("+MYm");
     }
     emu = add_extra_suffixes(emu, emu_type);
+    emu_name = strsave(emu);
     erts_snprintf(tmpStr, sizeof(tmpStr), "%s" DIRSEP "%s" BINARY_EXT, bindir, emu);
     emu = strsave(tmpStr);
 
@@ -682,6 +684,9 @@ int main(int argc, char **argv)
 			verbose = 1;
 		    } else if (strcmp(argv[i], "-emu_args_exit") == 0) {
 			print_args_exit = 1;
+		    } else if (strcmp(argv[i], "-emu_name_exit") == 0) {
+			printf("%s\n", emu_name);
+			exit(0);
 		    } else if (strcmp(argv[i], "-emu_qouted_cmd_exit") == 0) {
 			print_qouted_cmd_exit = 1;
 		    } else if (strcmp(argv[i], "-env") == 0) { /* -env VARNAME VARVALUE */
@@ -1970,6 +1975,11 @@ initial_argv_massage(int *argc, char ***argv)
      */
 
     vix = 0;
+
+    av = build_args_from_env("ERL_" OTP_SYSTEM_VERSION "_FLAGS");
+    if (av)
+	avv[vix++].argv = av;
+
     av = build_args_from_env("ERL_AFLAGS");
     if (av)
 	avv[vix++].argv = av;
@@ -1984,10 +1994,6 @@ initial_argv_massage(int *argc, char ***argv)
     if (av)
 	avv[vix++].argv = av;
 
-    av = build_args_from_env("ERL_" OTP_SYSTEM_VERSION "_FLAGS");
-    if (av)
-	avv[vix++].argv = av;
-
     av = build_args_from_env("ERL_ZFLAGS");
     if (av)
 	avv[vix++].argv = av;
diff --git a/erts/etc/common/heart.c b/erts/etc/common/heart.c
index 778b3569c7..7a5746e630 100644
--- a/erts/etc/common/heart.c
+++ b/erts/etc/common/heart.c
@@ -727,16 +727,16 @@ static int
 heart_cmd_reply(int fd, char *s)
 {
   struct msg m;
-  int len = strlen(s) + 1;	/* Include \0 */
+  int len = strlen(s);
 
   /* if s >= MSG_BODY_SIZE, return a write
    * failure immediately.
    */
-  if (len > sizeof(m.fill))
+  if (len >= sizeof(m.fill))
       return -1;
 
   m.op = HEART_CMD;
-  m.len = htons(len + 2);	/* Include Op */
+  m.len = htons(len + 1);	/* Include Op */
   strcpy((char*)m.fill, s);
 
   return write_message(fd, &m);
diff --git a/erts/etc/common/inet_gethost.c b/erts/etc/common/inet_gethost.c
index 8bd9368aa1..77bfd5e2bc 100644
--- a/erts/etc/common/inet_gethost.c
+++ b/erts/etc/common/inet_gethost.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1998-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -1297,7 +1297,7 @@ static int read_request(AddrByte **buff, size_t *buff_size)
     }
 
     if (siz > *buff_size) {
-	if (buff_size == 0) {
+	if (*buff_size == 0) {
 	    *buff = ALLOC((*buff_size = siz));
 	} else {
 	    *buff = REALLOC(*buff, (*buff_size = siz));
diff --git a/erts/etc/unix/cerl.src b/erts/etc/unix/cerl.src
index 0355f2629f..0b2d6512ea 100644
--- a/erts/etc/unix/cerl.src
+++ b/erts/etc/unix/cerl.src
@@ -62,13 +62,21 @@ cxargs_add() {
     done
 }
 
+eeargs=
+eeargs_add() {
+    while [ $# -gt 0 ]; do
+	cargs="$cargs $1"
+	eeargs="$eeargs $1"
+	shift
+    done
+}
+
 core=
 
 GDB=
 GDBBP=
 GDBARGS=
 TYPE=
-EMU_TYPE=
 debug=
 run_valgrind=no
 
@@ -127,34 +135,37 @@ while [ $# -gt 0 ]; do
 	    ;;
 	"-smp")
 	    shift
-	    cargs="$cargs -smp"
-	    EMU_TYPE=.smp
+	    if [ $# -le 0 ]; then
+		eeargs_add -smp
+	    else
+		case $1 in
+		    disable)
+			shift
+			eeargs_add -smpdisable
+			;;
+		    enable)
+			shift
+			eeargs_add -smp
+			;;
+		    *)
+			eeargs_add -smp
+		esac
+	    fi
+	    ;;
+	"-smpdisable")
+	    shift
+	    eeargs_add -smpdisable
 	    ;;
 	"-lcnt")
 	    shift
 	    cargs="$cargs -lcnt"
 	    TYPE=.lcnt
 	    ;;
-	"-frag")
-	    shift
-	    cargs="$cargs -frag"
-	    EMU_TYPE=.frag
-	    ;;
-	"-smp_frag")
-	    shift
-	    cargs="$cargs -smp_frag"
-	    EMU_TYPE=.smp_frag
-	    ;;
 	"-gprof")
 	    shift
 	    cargs="$cargs -gprof"
 	    TYPE=.gprof
 	    ;;
-	"-hybrid")
-	    shift
-	    cargs="$cargs -hybrid"
-	    EMU_TYPE=.hybrid
-	    ;;
 	"-debug")
 	    shift
 	    cargs="$cargs -debug"
@@ -180,11 +191,6 @@ while [ $# -gt 0 ]; do
 #	    shift
 #	    GDB=xxgdb
 #	    ;;
-	"-shared")
-	    shift
-	    cargs="$cargs -shared"
-	    TYPE=.shared
-	    ;;
 	"-purify")
 	    shift
 	    cargs="$cargs -purify"
@@ -222,7 +228,9 @@ PATH=$BINDIR:$ROOTDIR/bin:$PATH
 EXEC=$BINDIR/erlexec
 
 PROGNAME="$PROGNAME $cargs"
-EMU=$EMU$TYPE$EMU_TYPE
+EMU="$EMU$TYPE"
+EMU_NAME=`$EXEC -emu_name_exit $eeargs`
+
 if [ $run_valgrind != yes ]; then
     xargs="$xargs -pz $PRELOADED --"
 fi
@@ -248,9 +256,9 @@ if [ "x$GDB" = "x" ]; then
 	    valgrind_log=
 	else
 	    if [ $valmajor -gt 2 -a $valminor -gt 4 ]; then
-		valgrind_log="$log_file_prefix$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU.log.$$"
+		valgrind_log="$log_file_prefix$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU_NAME.log.$$"
 	    else
-		valgrind_log="$log_file_prefix$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU.log"
+		valgrind_log="$log_file_prefix$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU_NAME.log"
 	    fi
 	fi
 	if [ "x$VALGRIND_MISC_FLAGS" = "x" ]; then
@@ -263,9 +271,9 @@ if [ "x$GDB" = "x" ]; then
 	early_beam_args=`echo $beam_args | sed "s|^\(.*-progname\).*$|\1|g"`
 	late_beam_args=`echo $beam_args | sed "s|^$pre_beam_args.*\(-- -home.*\)$|\1|g"`
 	
-	exec valgrind $valgrind_xml $valgrind_log $valgrind_misc_flags $BINDIR/$EMU $emu_xargs $early_beam_args "$PROGNAME" $late_beam_args -pz $PRELOADED
+	exec valgrind $valgrind_xml $valgrind_log $valgrind_misc_flags $BINDIR/$EMU_NAME $emu_xargs $early_beam_args "$PROGNAME" $late_beam_args -pz $PRELOADED
     else
-	exec $EXEC $xargs ${1+"$@"}
+	exec $EXEC $eeargs $xargs ${1+"$@"}
     fi
 else
     if [ "x$EMACS" = "x" ]; then
@@ -300,5 +308,5 @@ else
             (insert-string \"source $ROOTDIR/erts/etc/unix/etp-commands\") \
             (comint-send-input)"
     # Fire up gdb in emacs...
-    exec $EMACS --eval "(progn (gdb \"gdb $GDBARGS$EMU\") $gdbcmd)"
+    exec $EMACS --eval "(progn (gdb \"gdb $GDBARGS$EMU_NAME\") $gdbcmd)"
 fi
diff --git a/erts/etc/unix/run_erl.c b/erts/etc/unix/run_erl.c
index cadff12c6f..8db8e09bee 100644
--- a/erts/etc/unix/run_erl.c
+++ b/erts/etc/unix/run_erl.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  * 
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  * 
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -221,6 +221,8 @@ int main(int argc, char **argv)
   char *p, *ptyslave=NULL;
   int i = 1;
   int off_argv;
+  int calculated_pipename = 0;
+  int highest_pipe_num = 0;
 
   program_name = argv[0];
 
@@ -298,10 +300,10 @@ int main(int argc, char **argv)
   if(*pipename && pipename[strlen(pipename)-1] == '/') {
     /* The user wishes us to find a unique pipe name in the specified */
     /* directory */
-    int highest_pipe_num = 0;
     DIR *dirp;
     struct dirent *direntp;
 
+    calculated_pipename = 1;
     dirp = opendir(pipename);
     if(!dirp) {
       ERRNO_ERR1(LOG_ERR,"Can't access pipe directory '%s'.", pipename);
@@ -322,28 +324,37 @@ int main(int argc, char **argv)
 	      PIPE_STUBNAME, highest_pipe_num+1);
   } /* if */
 
-  /* write FIFO - is read FIFO for `to_erl' program */
-  strn_cpy(fifo1, sizeof(fifo1), pipename);
-  strn_cat(fifo1, sizeof(fifo1), ".r");
-  if (create_fifo(fifo1, PERM) < 0) {
-    ERRNO_ERR1(LOG_ERR,"Cannot create FIFO %s for writing.", fifo1);
-    exit(1);
-  }
-
-  /* read FIFO - is write FIFO for `to_erl' program */
-  strn_cpy(fifo2, sizeof(fifo2), pipename);
-  strn_cat(fifo2, sizeof(fifo2), ".w");
-
-  /* Check that nobody is running run_erl already */
-  if ((fd = open (fifo2, O_WRONLY|DONT_BLOCK_PLEASE, 0)) >= 0) {
-    /* Open as client succeeded -- run_erl is already running! */
-    fprintf(stderr, "Erlang already running on pipe %s.\n", pipename);
-    close(fd);
-    exit(1);
-  }
-  if (create_fifo(fifo2, PERM) < 0) { 
-    ERRNO_ERR1(LOG_ERR,"Cannot create FIFO %s for reading.", fifo2);
-    exit(1);
+  for(;;) {
+      /* write FIFO - is read FIFO for `to_erl' program */
+      strn_cpy(fifo1, sizeof(fifo1), pipename);
+      strn_cat(fifo1, sizeof(fifo1), ".r");
+      if (create_fifo(fifo1, PERM) < 0) {
+	  ERRNO_ERR1(LOG_ERR,"Cannot create FIFO %s for writing.", fifo1);
+	  exit(1);
+      }
+      
+      /* read FIFO - is write FIFO for `to_erl' program */
+      strn_cpy(fifo2, sizeof(fifo2), pipename);
+      strn_cat(fifo2, sizeof(fifo2), ".w");
+      
+      /* Check that nobody is running run_erl already */
+      if ((fd = open (fifo2, O_WRONLY|DONT_BLOCK_PLEASE, 0)) >= 0) {
+	  /* Open as client succeeded -- run_erl is already running! */
+	  close(fd);
+	  if (calculated_pipename) {
+	      ++highest_pipe_num;
+	      strn_catf(pipename, sizeof(pipename), "%s.%d",
+			PIPE_STUBNAME, highest_pipe_num+1);
+	      continue;
+	  } 
+	  fprintf(stderr, "Erlang already running on pipe %s.\n", pipename);
+	  exit(1);
+      }
+      if (create_fifo(fifo2, PERM) < 0) { 
+	  ERRNO_ERR1(LOG_ERR,"Cannot create FIFO %s for reading.", fifo2);
+	  exit(1);
+      }
+      break;
   }
 
   /*
@@ -980,9 +991,7 @@ static int open_pty_master(char **ptyslave)
 static int open_pty_slave(char *name)
 {
   int sfd;
-#ifdef DEBUG
   struct termios tty_rmode;
-#endif
 
   if ((sfd = open(name, O_RDWR, 0)) < 0) {
     return -1;
@@ -1008,6 +1017,25 @@ static int open_pty_slave(char *name)
   }
 #endif
 
+  if (getenv("RUN_ERL_DISABLE_FLOWCNTRL")) {
+    if (tcgetattr(sfd, &tty_rmode) < 0) {
+      fprintf(stderr, "Cannot get terminal's current mode\n");
+      exit(-1);
+    }
+
+    tty_rmode.c_iflag &= ~IXOFF;
+    if (tcsetattr(sfd, TCSANOW, &tty_rmode) < 0) {
+      fprintf(stderr, "Cannot disable terminal's flow control on input\n");
+      exit(-1);
+    }
+
+    tty_rmode.c_iflag &= ~IXON;
+    if (tcsetattr(sfd, TCSANOW, &tty_rmode) < 0) {
+      fprintf(stderr, "Cannot disable terminal's flow control on output\n");
+      exit(-1);
+    }
+  }
+
 #ifdef DEBUG
   if (tcgetattr(sfd, &tty_rmode) < 0) {
     fprintf(stderr, "Cannot get terminals current mode\n");
diff --git a/erts/etc/unix/to_erl.c b/erts/etc/unix/to_erl.c
index 886b301997..11fa3ff4cc 100644
--- a/erts/etc/unix/to_erl.c
+++ b/erts/etc/unix/to_erl.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  * 
- * Copyright Ericsson AB 1996-2009. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  * 
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -125,7 +125,7 @@ static void usage(char *pname)
 int main(int argc, char **argv)
 {
     char  FIFO1[FILENAME_MAX], FIFO2[FILENAME_MAX];
-    int i, len, wfd, rfd, result = 0;
+    int i, len, wfd, rfd;
     fd_set readfds;
     char buf[BUFSIZ];
     char pipename[FILENAME_MAX];
@@ -367,7 +367,6 @@ int main(int argc, char **argv)
 	    }
 	    else {
 		fprintf(stderr, "Error in select.\n");
-		result = -1;
 		break;
 	    }
 	}
@@ -398,7 +397,6 @@ int main(int argc, char **argv)
 		close(wfd);
 		if (len < 0) {
 		    fprintf(stderr, "Error in reading from stdin.\n");
-		    result = -1;
 		} else {
 		    fprintf(stderr, "[EOF]\n\r");
 		}
@@ -420,7 +418,6 @@ int main(int argc, char **argv)
 		fprintf(stderr, "Error in writing to FIFO.\n");
 		close(rfd);
 		close(wfd);
-		result = -1;
 		break;
 	    }
 	    STATUS("\" OK\r\n");
@@ -447,7 +444,6 @@ int main(int argc, char **argv)
 		close(wfd);
 		if (len < 0) {
 		    fprintf(stderr, "Error in reading from FIFO.\n");
-		    result = -1;
 		} else
 		    fprintf(stderr, "[End]\n\r");
 		break;
@@ -456,7 +452,6 @@ int main(int argc, char **argv)
 		    if ((len=version_handshake(buf,len,wfd)) < 0) {
 			close(rfd);
 			close(wfd);
-			result = -1;
 			break;
 		    }
 		    if (protocol_ver >= 1) {
@@ -475,7 +470,6 @@ int main(int argc, char **argv)
 		    fprintf(stderr, "Error in writing to terminal.\n");
 		    close(rfd);
 		    close(wfd);
-		    result = -1;
 		    break;
 		}
 		STATUS("\" OK\r\n");
diff --git a/erts/etc/win32/erlsrv/erlsrv_service.c b/erts/etc/win32/erlsrv/erlsrv_service.c
index a58ee862c5..242e2905a9 100644
--- a/erts/etc/win32/erlsrv/erlsrv_service.c
+++ b/erts/etc/win32/erlsrv/erlsrv_service.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  * 
- * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  * 
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -523,7 +523,7 @@ static BOOL start_a_service(ServerInfo *srvi){
 		    srvi->keys[WorkDir].data.bytes : NULL,
 		    &start,
 		    &(srvi->info))){
-    sprintf(errbuff,"Could not start erlang service"
+    sprintf(errbuff,"Could not start erlang service "
 	    "with commandline \"%s\".",
 	    service_name,
 	    execbuff
@@ -924,7 +924,7 @@ static VOID WINAPI service_main_loop(DWORD argc, char **argv){
     } else {
       DWORD ecode = NO_ERROR;
       if(success_wait == NO_SUCCESS_WAIT){
-	log_warning("Erlang machine volountarily stopped. "
+	log_warning("Erlang machine voluntarily stopped. "
 		    "The service is not restarted as OnFail "
 		    "is set to ignore.");
       } else {
diff --git a/erts/etc/win32/nsis/dll_version_helper.sh b/erts/etc/win32/nsis/dll_version_helper.sh
index 571ee3e39e..eecd4a72b5 100755
--- a/erts/etc/win32/nsis/dll_version_helper.sh
+++ b/erts/etc/win32/nsis/dll_version_helper.sh
@@ -2,7 +2,7 @@
 # 
 # %CopyrightBegin%
 # 
-# Copyright Ericsson AB 2007-2010. All Rights Reserved.
+# Copyright Ericsson AB 2007-2011. All Rights Reserved.
 # 
 # The contents of this file are subject to the Erlang Public License,
 # Version 1.1, (the "License"); you may not use this file except in
@@ -26,6 +26,7 @@
 # exit 0
 
 cat > hello.c <<EOF
+#include <windows.h>
 #include <stdio.h>
 
 int main(void)
@@ -35,14 +36,74 @@ int main(void)
 }
 
 EOF
-cl /MD hello.c > /dev/null 2>&1
+cl /MD hello.c  > /dev/null 2>&1
 if [ '!' -f hello.exe.manifest ]; then
-    echo "This compiler does not generate manifest files - OK if using mingw" >&2
-    exit 0
+    # Gah - VC 2010 changes the way it handles DLL's and manifests... Again...
+    # need another way of getting the version
+    DLLNAME=`dumpbin.exe /imports hello.exe | egrep MSVCR.*dll`
+    DLLNAME=`echo $DLLNAME`
+    cat > helper.c <<EOF
+#include <windows.h>
+#include <stdio.h>
+
+#define REQ_MODULE "$DLLNAME"
+
+int main(void)
+{
+  DWORD dummy;
+  DWORD versize;
+  int i,n;
+  unsigned char *versinfo;
+  char buff[100];
+
+  char *vs_verinfo;
+  unsigned int vs_ver_size;
+  
+  struct LANGANDCODEPAGE {
+    WORD language;
+    WORD codepage;
+  } *translate;
+
+  unsigned int tr_size;
+  
+  if (!(versize = GetFileVersionInfoSize(REQ_MODULE,&dummy))) {
+    fprintf(stderr,"No version info size in %s!\n",REQ_MODULE);
+    exit(1);
+  }
+  versinfo=malloc(versize);
+  if (!GetFileVersionInfo(REQ_MODULE,dummy,versize,versinfo)) {
+    fprintf(stderr,"No version info in %s!\n",REQ_MODULE);
+    exit(2);
+  }
+  if (!VerQueryValue(versinfo,"\\\\VarFileInfo\\\\Translation",&translate,&tr_size)) {
+    fprintf(stderr,"No translation info in %s!\n",REQ_MODULE);
+    exit(3);
+  }
+  n = tr_size/sizeof(translate);
+  for(i=0; i < n; ++i) {
+    sprintf(buff,"\\\\StringFileInfo\\\\%04x%04x\\\\FileVersion",
+	    translate[i].language,translate[i].codepage);
+    if (VerQueryValue(versinfo,buff,&vs_verinfo,&vs_ver_size)) {
+      printf("%s\n",(char *) vs_verinfo);
+      return 0;
+    }
+  } 
+  fprintf(stderr,"Failed to find file version of %s\n",REQ_MODULE);
+  return 0;
+}
+EOF
+    cl /MD helper.c version.lib > /dev/null 2>&1
+    if [ '!' -f helper.exe ]; then
+	echo "Failed to build helper program." >&2
+	exit 1
+    fi
+    NAME=$DLLNAME
+    VERSION=`./helper`
+else
+    VERSION=`grep '<assemblyIdentity' hello.exe.manifest | sed 's,.*version=.\([0-9\.]*\).*,\1,g' | grep -v '<'`
+    NAME=`grep '<assemblyIdentity' hello.exe.manifest | sed 's,.*name=.[A-Za-z\.]*\([0-9]*\).*,msvcr\1.dll,g' | grep -v '<'`
 fi
-VERSION=`grep '<assemblyIdentity' hello.exe.manifest | sed 's,.*version=.\([0-9\.]*\).*,\1,g' | grep -v '<'`
-NAME=`grep '<assemblyIdentity' hello.exe.manifest | sed 's,.*name=.[A-Za-z\.]*\([0-9]*\).*,msvcr\1.dll,g' | grep -v '<'`
-rm -f hello.c hello.obj hello.exe hello.exe.manifest
+#rm -f hello.c hello.obj hello.exe hello.exe.manifest helper.c helper.obj helper.exe helper.exe.manifest
 if [ "$1" = "-n" ]; then
     ASKEDFOR=$NAME
 else
diff --git a/erts/etc/win32/nsis/find_redist.sh b/erts/etc/win32/nsis/find_redist.sh
index 153977ded5..bc4260ecba 100755
--- a/erts/etc/win32/nsis/find_redist.sh
+++ b/erts/etc/win32/nsis/find_redist.sh
@@ -2,7 +2,7 @@
 # 
 # %CopyrightBegin%
 # 
-# Copyright Ericsson AB 2007-2010. All Rights Reserved.
+# Copyright Ericsson AB 2007-2011. All Rights Reserved.
 # 
 # The contents of this file are subject to the Erlang Public License,
 # Version 1.1, (the "License"); you may not use this file except in
@@ -114,13 +114,18 @@ RCPATH=`lookup_prog_in_path rc`
 fail=false
 if [ '!' -z "$RCPATH" ]; then 
     BPATH=$RCPATH
-    for x in rc bin v6.0A ; do 
-	NBPATH=`remove_path_element $x "$BPATH"`
-	if [ "$NBPATH" = "$BPATH" ]; then
-	    fail=true
-	    break;
+    allow_fail=false
+    for x in rc bin @ANY v6.0A v7.0A v7.1; do
+	if [ $x = @ANY ]; then
+	    allow_fail=true
+	else
+	    NBPATH=`remove_path_element $x "$BPATH"`
+	    if [ $allow_fail = false -a "$NBPATH" = "$BPATH" ]; then
+		fail=true
+		break;
+	    fi
+	    BPATH="$NBPATH"
 	fi
-	BPATH="$NBPATH"
     done
     if [ $fail = false ]; then
 	BPATH_LIST="$BPATH_LIST $BPATH"
@@ -129,23 +134,31 @@ fi
 
 # Frantic search through two roots with different 
 # version directories. We want to be very specific about the
-# directory structures as we woildnt want to find the wrong 
+# directory structures as we wouldnt want to find the wrong 
 # redistributables...
 
-#echo $BPATH
+#echo $BPATH_LIST
 for BP in $BPATH_LIST; do
-    for verdir in "sdk v2.0" "sdk v3.5" "v6.0A"; do
+    for verdir in "sdk v2.0" "sdk v3.5" "v6.0A" "v7.0"  "v7.0A" "v7.1"; do
 	BPATH=$BP
 	fail=false
-	for x in $verdir bootstrapper packages vcredist_x86 vcredist_x86.exe; do
+	allow_fail=false
+	for x in $verdir @ANY bootstrapper packages vcredist_x86 Redist VC @ALL vcredist_x86.exe; do
 	    #echo "x=$x"
 	    #echo "BPATH=$BPATH"
-	    NBPATH=`add_path_element $x "$BPATH"`
-	    if [ "$NBPATH" = "$BPATH" ]; then
-		fail=true
-		break;
+	    #echo "allow_fail=$allow_fail"
+	    if [ $x = @ANY ]; then
+		allow_fail=true
+	    elif [ $x = @ALL ]; then
+		allow_fail=false
+	    else
+		NBPATH=`add_path_element $x "$BPATH"`
+		if [ $allow_fail = false -a "$NBPATH" = "$BPATH" ]; then
+		    fail=true
+		    break;
+		fi
+		BPATH="$NBPATH"
 	    fi
-	    BPATH="$NBPATH"
 	done
 	if [ $fail = false ]; then
 	    break;
@@ -157,6 +170,18 @@ for BP in $BPATH_LIST; do
     fi
 done
 
+# shortcut for locating vcredist_x86.exe is to put it into $ERL_TOP
+if [ -f $ERL_TOP/vcredist_x86.exe ]; then
+    echo $ERL_TOP/vcredist_x86.exe
+    exit 0
+fi
+
+# or $ERL_TOP/.. to share across multiple builds
+if [ -f $ERL_TOP/../vcredist_x86.exe ]; then
+    echo $ERL_TOP/../vcredist_x86.exe
+    exit 0
+fi
+
 echo "Failed to locate vcredist_x86.exe because directory structure was unexpected" >&2
 exit 3