Add makefile function for target-specific variable

Closes #672

libexec/trick/make_makefile_src

@@ -245,6 +245,11 @@ build/S_source.d: ;
 
 # MODEL_OBJECTS ================================================================
 
+# This function allows users to specify target-specific variables for individual
+# or groups of source files. For example:
+# \$(call FIND_MODEL_OBJECTS, /path/to/file /path/to/directory \$(LIST_OF_PATHS)): TRICK_CXXFLAGS += -Werror
+FIND_MODEL_OBJECTS = \$(foreach PATH, \$1, \$(filter \$(addprefix build, \$(addsuffix %, \$(PATH))), \$(MODEL_OBJECTS)))
+
 " ;
 
 # List out all of the object files and put the list in a file that we can pass to the linker.

test/SIM_target_specific_variables/S_define

@@ -0,0 +1,11 @@
+#include "sim_objects/default_trick_sys.sm"
+
+##include "one/1.hh"
+##include "many/a.hh"
+##include "many/b.hh"
+##include "many/c.hh"
+##include "nested/x.hh"
+##include "nested/y/y.hh"
+##include "nested/z/z.hh"
+
+class Sandbox : public Trick::SimObject {};

test/SIM_target_specific_variables/S_overrides.mk

@@ -0,0 +1,16 @@
+MODELS :=$(CURDIR)/models
+
+# Warn about comment markers /* within comments and make them errors, causing
+# the build to fail.
+TRICK_CXXFLAGS += -I$(MODELS) -Wcomment -Werror
+
+PATHS := $(MODELS)/many $(MODELS)/nested
+
+# The zero directory contains no files, so FIND_MODEL_OBJECTS should return an
+# empty list, resulting in a rule that is never run. If it is, the invalid
+# "not_a_flag" should cause the build to fail.
+$(call FIND_MODEL_OBJECTS, $(MODELS)/zero): TRICK_CXXFLAGS += not_a_flag
+
+# By turning off warnings about comment markers within comments in all the
+# offending files, this sim should build without error.
+$(call FIND_MODEL_OBJECTS, $(MODELS)/one/1 $(PATHS)): TRICK_CXXFLAGS += -Wno-comment

test/SIM_target_specific_variables/models/many/a.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/many/a.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{many/a.cpp}

test/SIM_target_specific_variables/models/many/b.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/many/b.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{many/b.cpp}

test/SIM_target_specific_variables/models/many/c.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/many/c.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{many/c.cpp}

test/SIM_target_specific_variables/models/nested/x.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/nested/x.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{nested/x.cpp}

test/SIM_target_specific_variables/models/nested/y/y.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/nested/y/y.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{nested/y/y.cpp}

test/SIM_target_specific_variables/models/nested/z/z.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/nested/z/z.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{nested/z/z.cpp}

test/SIM_target_specific_variables/models/one/1.cpp

@@ -0,0 +1 @@
+/* /* */

test/SIM_target_specific_variables/models/one/1.hh

@@ -0,0 +1 @@
+// @trick_link_dependency{one/1.cpp}

test/makefile

@@ -8,6 +8,7 @@ COMPILE_DIRS = \
 	SIM_python_namespace \
 	SIM_rti \
 	SIM_stls \
+	SIM_target_specific_variables \
 	SIM_test_dp \
 	SIM_test_dr \
 	SIM_test_io \