solaris is compiled with  --enable-xpg-echo-default=yes which makes some
tests fail. Should we use printf '%s\n' "..." instead?

--- tests/comsub2.sub	2016-11-28 01:04:23.177652643 -0800
+++ tests/comsub2.sub	2016-11-28 01:01:49.330747645 -0800
@@ -4,5 +4,5 @@ echo "$qpath"
 
 # it's crazy that all three of these produce the same result
 echo ${qpath//\\/}
-echo ${qpath//"`echo \\`"/}
-echo ${qpath//`echo "\\\\\\\\"`/}
+echo ${qpath//"`echo -E \\`"/}
+echo ${qpath//`echo -E "\\\\\\\\"`/}
--- tests/exp5.sub	2016-11-28 02:38:32.148794257 -0800
+++ tests/exp5.sub	2016-11-28 02:33:12.133199473 -0800
@@ -1,18 +1,18 @@
 # expansions involving patterns
 
 var='[hello'
-echo "${var//[/}"
+echo -E "${var//[/}"
 
 red='\[\e[0;31m\]'
-echo "${red//\\[\\e/}"
+echo -E "${red//\\[\\e/}"
 
 foo="${red//\\[\\e/}"
 
 # foo == [0;31m\]
-echo "${foo//[0;31m\\/}"
+echo -E "${foo//[0;31m\\/}"
 
-echo "${var//[]/}"
-echo "${red//[]/}"
+echo -E "${var//[]/}"
+echo -E "${red//[]/}"
 
 v=hello
 foo='[:alpha:]'
--- tests/exp8.sub	2016-11-28 03:44:56.875686938 -0800
+++ tests/exp8.sub	2016-11-28 03:39:21.761054928 -0800
@@ -10,11 +10,11 @@ declare -p var | sed -n l
 
 recho ${var@Q}
 recho ${var@P}
-echo ${var@A}
+echo -E ${var@A}
 
 unset array
 array=( [$'x\001y\177z']=foo )	# should be error
-echo ${array[@]@A}
+echo -E ${array[@]@A}
 
 unset array
 declare -a array=([0]=$'x\001y\177z')
@@ -23,9 +23,9 @@ declare -p array
 unset array
 array=( "$var" )
 recho ${array[@]}
-echo ${array[@]@A}
+echo -E ${array[@]@A}
 
 unset array
 declare -A array
 array=( [$'x\001y\177z']=$'a\242b\002c' )
-echo ${array[@]@A}
+echo -E ${array[@]@A}
--- tests/heredoc3.sub	2016-11-28 03:58:47.587299575 -0800
+++ tests/heredoc3.sub	2016-11-28 03:55:11.935894965 -0800
@@ -69,7 +69,7 @@ cat <<END
 hello
 \END
 END
-echo end 'hello<NL>\END'
+echo -E end 'hello<NL>\END'
 
 # this has to be last -- results in a syntax error
 # doesn't currently parse because EOF is not on a line by itself -- should it?
--- tests/quote1.sub	2016-11-28 04:11:46.210688369 -0800
+++ tests/quote1.sub	2016-11-28 04:08:49.101872596 -0800
@@ -14,7 +14,7 @@ echo "'${test//"'"/}'"
 
 echo "'${test//"'"/"'\\''"}'"
 
-echo "'${test//"'"/\'\\'\'}'"
+echo -E "'${test//"'"/\'\\'\'}'"
 
 #echo "'${test//'/}'"   # hangs waiting for '
 #echo "'${test//"'"/'\\''}'" # hangs waiting for '