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-rw-r--r--tests/cxx/tree/binary/cdr/makefile2
-rw-r--r--tests/cxx/tree/binary/polymorphic/makefile2
-rw-r--r--tests/cxx/tree/binary/xdr/makefile2
-rw-r--r--tests/cxx/tree/built-in/makefile2
-rw-r--r--tests/cxx/tree/chameleon/makefile2
-rw-r--r--tests/cxx/tree/comparison/makefile2
-rw-r--r--tests/cxx/tree/compilation/makefile2
-rw-r--r--tests/cxx/tree/complex/ctor/makefile2
-rw-r--r--tests/cxx/tree/containment/makefile2
-rw-r--r--tests/cxx/tree/default/general/makefile2
-rw-r--r--tests/cxx/tree/default/omit/makefile2
-rw-r--r--tests/cxx/tree/detach/makefile2
-rw-r--r--tests/cxx/tree/encoding/char/iso-8859-1/makefile2
-rw-r--r--tests/cxx/tree/encoding/char/lcp/makefile2
-rw-r--r--tests/cxx/tree/encoding/char/utf-8/makefile2
-rw-r--r--tests/cxx/tree/encoding/wchar/makefile2
-rw-r--r--tests/cxx/tree/enumeration/ctor/makefile2
-rw-r--r--tests/cxx/tree/enumeration/inheritance/makefile2
-rw-r--r--tests/cxx/tree/float/makefile2
-rw-r--r--tests/cxx/tree/list/ctor/makefile2
-rw-r--r--tests/cxx/tree/name-clash/inheritance/makefile2
-rw-r--r--tests/cxx/tree/naming/camel/makefile2
-rw-r--r--tests/cxx/tree/naming/java/makefile2
-rw-r--r--tests/cxx/tree/naming/knr/makefile2
-rw-r--r--tests/cxx/tree/polymorphism/comparison/makefile2
-rw-r--r--tests/cxx/tree/polymorphism/ostream/makefile2
-rw-r--r--tests/cxx/tree/polymorphism/same-type/makefile2
-rw-r--r--tests/cxx/tree/prefix/makefile2
-rw-r--r--tests/cxx/tree/test-template/makefile2
-rw-r--r--tests/cxx/tree/types-only/makefile2
-rw-r--r--tests/cxx/tree/union/ctor/makefile2
-rw-r--r--tests/cxx/tree/wildcard/makefile2
32 files changed, 32 insertions, 32 deletions
diff --git a/tests/cxx/tree/binary/cdr/makefile b/tests/cxx/tree/binary/cdr/makefile
index 9298961..235c88e 100644
--- a/tests/cxx/tree/binary/cdr/makefile
+++ b/tests/cxx/tree/binary/cdr/makefile
@@ -37,7 +37,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-insertion ACE_OutputCDR \
+$(gen): xsd_options += --generate-insertion ACE_OutputCDR \
--generate-extraction ACE_InputCDR
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/binary/polymorphic/makefile b/tests/cxx/tree/binary/polymorphic/makefile
index cca1e2c..acb4ef6 100644
--- a/tests/cxx/tree/binary/polymorphic/makefile
+++ b/tests/cxx/tree/binary/polymorphic/makefile
@@ -37,7 +37,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-polymorphic --root-element-last \
+$(gen): xsd_options += --generate-polymorphic --root-element-last \
--generate-insertion ACE_OutputCDR --generate-extraction ACE_InputCDR
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/binary/xdr/makefile b/tests/cxx/tree/binary/xdr/makefile
index bf37c4b..ae90fbe 100644
--- a/tests/cxx/tree/binary/xdr/makefile
+++ b/tests/cxx/tree/binary/xdr/makefile
@@ -33,7 +33,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-insertion XDR --generate-extraction XDR
+$(gen): xsd_options += --generate-insertion XDR --generate-extraction XDR
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/built-in/makefile b/tests/cxx/tree/built-in/makefile
index e30789f..7da5185 100644
--- a/tests/cxx/tree/built-in/makefile
+++ b/tests/cxx/tree/built-in/makefile
@@ -35,7 +35,7 @@ gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := \
+$(gen): xsd_options += \
--char-type char \
--generate-inline \
--generate-ostream \
diff --git a/tests/cxx/tree/chameleon/makefile b/tests/cxx/tree/chameleon/makefile
index 59f2a7e..96c10e3 100644
--- a/tests/cxx/tree/chameleon/makefile
+++ b/tests/cxx/tree/chameleon/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --root-element root --generate-ostream
+$(gen): xsd_options += --root-element root --generate-ostream
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/comparison/makefile b/tests/cxx/tree/comparison/makefile
index be76d46..e9c1bce 100644
--- a/tests/cxx/tree/comparison/makefile
+++ b/tests/cxx/tree/comparison/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-comparison
+$(gen): xsd_options += --generate-comparison
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/compilation/makefile b/tests/cxx/tree/compilation/makefile
index 72769f2..a963b16 100644
--- a/tests/cxx/tree/compilation/makefile
+++ b/tests/cxx/tree/compilation/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-serialization
+$(gen): xsd_options += --generate-serialization
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/complex/ctor/makefile b/tests/cxx/tree/complex/ctor/makefile
index 64ae848..3b30d09 100644
--- a/tests/cxx/tree/complex/ctor/makefile
+++ b/tests/cxx/tree/complex/ctor/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-default-ctor --generate-from-base-ctor \
+$(gen): xsd_options += --generate-default-ctor --generate-from-base-ctor \
--generate-doxygen --generate-polymorphic --polymorphic-type-all \
--generate-comparison
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/containment/makefile b/tests/cxx/tree/containment/makefile
index ea1a160..efa2c3d 100644
--- a/tests/cxx/tree/containment/makefile
+++ b/tests/cxx/tree/containment/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-default-ctor
+$(gen): xsd_options += --generate-default-ctor
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/default/general/makefile b/tests/cxx/tree/default/general/makefile
index 3c555ac..d752ea2 100644
--- a/tests/cxx/tree/default/general/makefile
+++ b/tests/cxx/tree/default/general/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-ostream --generate-serialization \
+$(gen): xsd_options += --generate-ostream --generate-serialization \
--generate-default-ctor --generate-from-base-ctor
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/default/omit/makefile b/tests/cxx/tree/default/omit/makefile
index 53dd1d1..ece237b 100644
--- a/tests/cxx/tree/default/omit/makefile
+++ b/tests/cxx/tree/default/omit/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-ostream --generate-serialization \
+$(gen): xsd_options += --generate-ostream --generate-serialization \
--generate-default-ctor --generate-from-base-ctor --omit-default-attributes
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/detach/makefile b/tests/cxx/tree/detach/makefile
index 44668a2..333ba85 100644
--- a/tests/cxx/tree/detach/makefile
+++ b/tests/cxx/tree/detach/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-detach --generate-default-ctor
+$(gen): xsd_options += --generate-detach --generate-default-ctor
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/encoding/char/iso-8859-1/makefile b/tests/cxx/tree/encoding/char/iso-8859-1/makefile
index 701c20e..75e8814 100644
--- a/tests/cxx/tree/encoding/char/iso-8859-1/makefile
+++ b/tests/cxx/tree/encoding/char/iso-8859-1/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --char-encoding iso8859-1 --generate-serialization \
+$(gen): xsd_options += --char-encoding iso8859-1 --generate-serialization \
--generate-doxygen
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/encoding/char/lcp/makefile b/tests/cxx/tree/encoding/char/lcp/makefile
index a7a4b82..5e3fdde 100644
--- a/tests/cxx/tree/encoding/char/lcp/makefile
+++ b/tests/cxx/tree/encoding/char/lcp/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-serialization --char-encoding lcp
+$(gen): xsd_options += --generate-serialization --char-encoding lcp
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/encoding/char/utf-8/makefile b/tests/cxx/tree/encoding/char/utf-8/makefile
index 2224d85..03bebf3 100644
--- a/tests/cxx/tree/encoding/char/utf-8/makefile
+++ b/tests/cxx/tree/encoding/char/utf-8/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-serialization --generate-doxygen
+$(gen): xsd_options += --generate-serialization --generate-doxygen
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/encoding/wchar/makefile b/tests/cxx/tree/encoding/wchar/makefile
index dd601ca..31cc326 100644
--- a/tests/cxx/tree/encoding/wchar/makefile
+++ b/tests/cxx/tree/encoding/wchar/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-serialization --generate-doxygen \
+$(gen): xsd_options += --generate-serialization --generate-doxygen \
--char-type wchar_t
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/enumeration/ctor/makefile b/tests/cxx/tree/enumeration/ctor/makefile
index 4837e7c..afa7e2f 100644
--- a/tests/cxx/tree/enumeration/ctor/makefile
+++ b/tests/cxx/tree/enumeration/ctor/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-default-ctor --generate-from-base-ctor \
+$(gen): xsd_options += --generate-default-ctor --generate-from-base-ctor \
--generate-doxygen
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/enumeration/inheritance/makefile b/tests/cxx/tree/enumeration/inheritance/makefile
index 5677adc..0b01665 100644
--- a/tests/cxx/tree/enumeration/inheritance/makefile
+++ b/tests/cxx/tree/enumeration/inheritance/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-ostream
+$(gen): xsd_options += --generate-ostream
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/float/makefile b/tests/cxx/tree/float/makefile
index 230d682..facef41 100644
--- a/tests/cxx/tree/float/makefile
+++ b/tests/cxx/tree/float/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-serialization --root-element-all
+$(gen): xsd_options += --generate-serialization --root-element-all
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/list/ctor/makefile b/tests/cxx/tree/list/ctor/makefile
index 8cfde68..8907229 100644
--- a/tests/cxx/tree/list/ctor/makefile
+++ b/tests/cxx/tree/list/ctor/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-default-ctor --generate-from-base-ctor \
+$(gen): xsd_options += --generate-default-ctor --generate-from-base-ctor \
--generate-doxygen
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/name-clash/inheritance/makefile b/tests/cxx/tree/name-clash/inheritance/makefile
index d6258ab..c826fd4 100644
--- a/tests/cxx/tree/name-clash/inheritance/makefile
+++ b/tests/cxx/tree/name-clash/inheritance/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-ostream
+$(gen): xsd_options += --generate-ostream
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/naming/camel/makefile b/tests/cxx/tree/naming/camel/makefile
index b7f862f..2d9db6b 100644
--- a/tests/cxx/tree/naming/camel/makefile
+++ b/tests/cxx/tree/naming/camel/makefile
@@ -35,7 +35,7 @@ gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := \
+$(gen): xsd_options += \
--type-naming ucc \
--function-naming lcc \
--generate-ostream \
diff --git a/tests/cxx/tree/naming/java/makefile b/tests/cxx/tree/naming/java/makefile
index a7d8b29..7f798a9 100644
--- a/tests/cxx/tree/naming/java/makefile
+++ b/tests/cxx/tree/naming/java/makefile
@@ -35,7 +35,7 @@ gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := \
+$(gen): xsd_options += \
--type-naming java \
--function-naming java \
--generate-ostream \
diff --git a/tests/cxx/tree/naming/knr/makefile b/tests/cxx/tree/naming/knr/makefile
index 0baf083..b6a5c36 100644
--- a/tests/cxx/tree/naming/knr/makefile
+++ b/tests/cxx/tree/naming/knr/makefile
@@ -35,7 +35,7 @@ gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := \
+$(gen): xsd_options += \
--type-naming knr \
--function-naming knr \
--generate-ostream \
diff --git a/tests/cxx/tree/polymorphism/comparison/makefile b/tests/cxx/tree/polymorphism/comparison/makefile
index 5fe465f..de9dcdd 100644
--- a/tests/cxx/tree/polymorphism/comparison/makefile
+++ b/tests/cxx/tree/polymorphism/comparison/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-polymorphic --polymorphic-type base \
+$(gen): xsd_options += --generate-polymorphic --polymorphic-type base \
--generate-comparison
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/polymorphism/ostream/makefile b/tests/cxx/tree/polymorphism/ostream/makefile
index daf31ce..f38fcbd 100644
--- a/tests/cxx/tree/polymorphism/ostream/makefile
+++ b/tests/cxx/tree/polymorphism/ostream/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-polymorphic --polymorphic-type-all \
+$(gen): xsd_options += --generate-polymorphic --polymorphic-type-all \
--root-element root --generate-ostream
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/polymorphism/same-type/makefile b/tests/cxx/tree/polymorphism/same-type/makefile
index 3c66ef5..4e434c0 100644
--- a/tests/cxx/tree/polymorphism/same-type/makefile
+++ b/tests/cxx/tree/polymorphism/same-type/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-ostream --generate-polymorphic \
+$(gen): xsd_options += --generate-ostream --generate-polymorphic \
--root-element root
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/prefix/makefile b/tests/cxx/tree/prefix/makefile
index 304ceef..c7b2314 100644
--- a/tests/cxx/tree/prefix/makefile
+++ b/tests/cxx/tree/prefix/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-serialization --generate-polymorphic \
+$(gen): xsd_options += --generate-serialization --generate-polymorphic \
--polymorphic-type foo\#base --root-element root
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/test-template/makefile b/tests/cxx/tree/test-template/makefile
index 9fdec91..b4ff5f2 100644
--- a/tests/cxx/tree/test-template/makefile
+++ b/tests/cxx/tree/test-template/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-ostream
+$(gen): xsd_options += --generate-ostream
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/types-only/makefile b/tests/cxx/tree/types-only/makefile
index 4b19ab7..0ccb70e 100644
--- a/tests/cxx/tree/types-only/makefile
+++ b/tests/cxx/tree/types-only/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --suppress-parsing
+$(gen): xsd_options += --suppress-parsing
$(gen): $(out_root)/xsd/xsd
$(call include-dep,$(dep),$(obj),$(gen))
diff --git a/tests/cxx/tree/union/ctor/makefile b/tests/cxx/tree/union/ctor/makefile
index 53b1055..3c08eaa 100644
--- a/tests/cxx/tree/union/ctor/makefile
+++ b/tests/cxx/tree/union/ctor/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-default-ctor --generate-from-base-ctor \
+$(gen): xsd_options += --generate-default-ctor --generate-from-base-ctor \
--generate-doxygen
$(gen): $(out_root)/xsd/xsd
diff --git a/tests/cxx/tree/wildcard/makefile b/tests/cxx/tree/wildcard/makefile
index 0886cf2..4a0e70d 100644
--- a/tests/cxx/tree/wildcard/makefile
+++ b/tests/cxx/tree/wildcard/makefile
@@ -34,7 +34,7 @@ genf := $(xsd:.xsd=.hxx) $(xsd:.xsd=.ixx) $(xsd:.xsd=.cxx)
gen := $(addprefix $(out_base)/,$(genf))
$(gen): xsd := $(out_root)/xsd/xsd
-$(gen): xsd_options := --generate-wildcard --generate-default-ctor \
+$(gen): xsd_options += --generate-wildcard --generate-default-ctor \
--generate-from-base-ctor --generate-serialization --generate-comparison
$(gen): $(out_root)/xsd/xsd