:D expanded when var set
true
TRUE
:U expanded when var undef
true
TRUE
:D skipped if var undef

:U skipped when var set
is set
:? only lhs when value true
true
TRUE
:? only rhs when value false
false
FALSE
do not evaluate or expand :? if discarding
is set
Version=123.456.789 == 123456789
Literal=3.4.5 == 3004005
We have target specific vars
save-dollars: 0        = $
save-dollars: 1        = $$
save-dollars: 2        = $$
save-dollars: False    = $
save-dollars: True     = $$
save-dollars: false    = $
save-dollars: true     = $$
save-dollars: Yes      = $$
save-dollars: No       = $
save-dollars: yes      = $$
save-dollars: no       = $
save-dollars: On       = $$
save-dollars: Off      = $
save-dollars: ON       = $$
save-dollars: OFF      = $
save-dollars: on       = $$
save-dollars: off      = $
export-appended: env
export-appended: env
export-appended: env mk
parse-dynamic: parse-dynamic parse-dynamic before
parse-dynamic: parse-dynamic parse-dynamic after
parse-dynamic: parse-dynamic parse-dynamic after
varerror-unclosed:begin
make: in target "varerror-unclosed": Unclosed variable ""

make: in target "varerror-unclosed": Unclosed variable "UNCLOSED"

make: in target "varerror-unclosed": Unclosed variable "UNCLOSED"

make: in target "varerror-unclosed": while evaluating variable "UNCLOSED" with value "": Unclosed variable "PATTERN"
make: in target "varerror-unclosed": while evaluating variable "UNCLOSED" with value "": Unclosed expression, expecting '}' for modifier "M${PATTERN"

make: in target "varerror-unclosed": Unclosed variable "param"
make: in target "varerror-unclosed": Unclosed variable "UNCLOSED."


make: in target "varerror-unclosed": Unclosed variable "UNCLOSED.1"

make: in target "varerror-unclosed": Unclosed variable "UNCLOSED.2"

make: in target "varerror-unclosed": Unclosed variable "UNCLOSED.3"

make: in target "varerror-unclosed": while evaluating variable "UNCLOSED_INDIR_2" with value "${UNCLOSED_INDIR_1}": while evaluating variable "UNCLOSED_INDIR_1" with value "${UNCLOSED_ORIG": Unclosed variable "UNCLOSED_ORIG"

varerror-unclosed:end
target1-flags: we have: one two
target2-flags: we have: one two three four
exit status 2