test: regenerate Makefiles

These got a bit out of sync, unfortunately.  To help keep things
synchronized in the future I've added a 'generate' target to the
primary Makefile, and added a GitHub Action to run that in a CI check
which will fail if the generated files include any changes.

.appveyor.yml

@@ -1,7 +1,8 @@
 version: "{build}"
 branches:
   except:
-    - /^(wip\/)?(travis|osx)(\-.+)?$/
+    - /^ci/(?!appveyor)(/.+)?/
+    - /^dependabot/(/.+)?/
 
 environment:
   matrix:

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches-ignore:
+      - 'ci/**'
+      - '!ci/gha**'
+      - 'dependabot/**'
+  pull_request:
+    branches:
+      - 'master'
+
+concurrency:
+  group: build-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-generated-files:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Regenerate files
+        working-directory: test
+        run: make maintainer-clean && make generate ECHO="$(which echo)"
+      - name: Check for changes
+        run: git diff --exit-code

test/.gitignore

@@ -454,4 +454,3 @@
 /warn-unused-result.o
 /warn-unused-result.map
 /warn-unused-result-cpp.map
-/.gitignore

test/Makefile

@@ -119,9 +119,22 @@ endif
 CLEANFILES = \
 	$(TESTS) \
 	$(TESTS:=-cpp) \
-	$(TESTS:=.cpp)
+	$(TESTS:=.cpp) \
+	$(NULL)
+
+GENERATED_FILES = \
+	.gitignore \
+	Makefile.dmc \
+	Makefile.iar \
+	Makefile.icl \
+	Makefile.msvc \
+	Makefile.pelles \
+	$(NULL)
 
-all: $(TESTS) $(CXXTESTS) .gitignore Makefile.msvc Makefile.iar Makefile.dmc
+all: generate $(TESTS) $(CXXTESTS)
+
+.PHONY: generate
+generate: $(GENERATED_FILES)
 
 %.cpp: %.c
 	cp -a $^ $@
@@ -142,137 +155,141 @@ $(1)-cpp: $(1:=.cpp)
 	$(CXX) $(filter-out -Werror,$(CXXFLAGS)) $(CXX_OUTPUT_FILE)$(1) $(1:=.cpp)
 endef
 
+ECHO ?= echo
+
 .gitignore: Makefile
-	@echo "# Generated by Makefile. Do not edit." > $@
-	@$(foreach file,$(TESTS),echo -e "/$(file)\n/$(file:=.exe)\n/$(file:=.cpp)\n/$(file:=-cpp)\n/$(file:=-cpp.exe)\n/$(file:=-cpp.o)\n/$(file:=.obj)\n/$(file:=.lib)\n/$(file:=-cpp.obj)\n/$(file:=-cpp.lib)\n/$(file:=.o)\n/$(file:=.map)\n/$(file:=-cpp.map)" >> $@;)
-	@echo "/.gitignore" >> $@
+	@$(ECHO) -e "# Generated by Makefile. Do not edit." > $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "/$(file)\n/$(file:=.exe)\n/$(file:=.cpp)\n/$(file:=-cpp)\n/$(file:=-cpp.exe)\n/$(file:=-cpp.o)\n/$(file:=.obj)\n/$(file:=.lib)\n/$(file:=-cpp.obj)\n/$(file:=-cpp.lib)\n/$(file:=.o)\n/$(file:=.map)\n/$(file:=-cpp.map)" >> $@;)
 
 Makefile.iar: Makefile
-	@echo -e "# Generated by Makefile. Do not edit.\r" > $@
-	@echo -e "CC = \"C:\x5cProgram Files (x86)\x5cIAR Systems\x5cEmbedded Workbench 8.4\x5carm\x5cbin\x5ciccarm.exe\"\r" >> $@
-	@echo -e "CXX = \x24(CC)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "# Generated by Makefile. Do not edit.\r" > $@
+	@$(ECHO) -e "CC = \"C:\x5cProgram Files (x86)\x5cIAR Systems\x5cEmbedded Workbench 8.4\x5carm\x5cbin\x5ciccarm.exe\"\r" >> $@
+	@$(ECHO) -e "CXX = \x24(CC)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "CFLAGS = --silent --remarks --warnings_are_errors\r" >> $@
-	@echo -e "CXXFLAGS = --c++ \x24(CFLAGS)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "CFLAGS = --silent --remarks --warnings_are_errors\r" >> $@
+	@$(ECHO) -e "CXXFLAGS = --c++ \x24(CFLAGS)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.o) $(file:=-cpp.o) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.o) $(file:=-cpp.o) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.cpp) $(file:=.o) $(file:=-cpp.o) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.cpp) $(file:=.o) $(file:=-cpp.o) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "all: \x24(TESTS)\r\n\r" >> $@
-	@echo -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
+	@$(ECHO) -e "all: \x24(TESTS)\r\n\r" >> $@
+	@$(ECHO) -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
 
-	@$(foreach file,$(TESTS),echo -e "$(file:=.o): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) --output \x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.o): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) --output \x24(@) \x24(?)\r\n\r" >> $@;)
+	@$(foreach file,$(TESTS),$(ECHO) -e "$(file:=.o): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) --output \x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.o): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) --output \x24(@) \x24(?)\r\n\r" >> $@;)
 
 Makefile.dmc: Makefile
-	@echo -e "# Generated by Makefile. Do not edit.\r" > $@
-	@echo -e "CC = \"dmc.exe\"\r" >> $@
-	@echo -e "CXX = \x24(CC)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "# Generated by Makefile. Do not edit.\r" > $@
+	@$(ECHO) -e "CC = \"dmc.exe\"\r" >> $@
+	@$(ECHO) -e "CXX = \x24(CC)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "CFLAGS = -w -w17 -w18 -wx\r" >> $@
-	@echo -e "CXXFLAGS = -wc \x24(CFLAGS)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "CFLAGS = -w -w17 -w18 -wx\r" >> $@
+	@$(ECHO) -e "CXXFLAGS = -wc \x24(CFLAGS)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.cpp) $(file:=.exe) $(file:=-cpp.exe) $(file:=.map) $(file:=-cpp.map) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.cpp) $(file:=.exe) $(file:=-cpp.exe) $(file:=.map) $(file:=-cpp.map) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "all: \x24(TESTS)\r\n\r" >> $@
-	@echo -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
+	@$(ECHO) -e "all: \x24(TESTS)\r\n\r" >> $@
+	@$(ECHO) -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
 
-	@$(foreach file,$(TESTS),echo -e "$(file:=.exe): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) -o \x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.exe): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) -o \x24(@) \x24(?)\r\n\r" >> $@;)
+	@$(foreach file,$(TESTS),$(ECHO) -e "$(file:=.exe): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) -o \x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.exe): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) -o \x24(@) \x24(?)\r\n\r" >> $@;)
 
 Makefile.msvc: Makefile
-	@echo -e "# Generated by Makefile. Do not edit.\r" > $@
-	@echo -e "CC = cl\r" >> $@
-	@echo -e "CXX = \x24(CC)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "# Generated by Makefile. Do not edit.\r" > $@
+	@$(ECHO) -e "CC = cl\r" >> $@
+	@$(ECHO) -e "CXX = \x24(CC)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "CFLAGS = /nologo /Wall /wd4464 /wd4514\r" >> $@
-	@echo -e "CXXFLAGS = \x24(CFLAGS)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "CFLAGS = /nologo /Wall /wd4464 /wd4514\r" >> $@
+	@$(ECHO) -e "CXXFLAGS = \x24(CFLAGS)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.cpp) $(file:=.obj) $(file:=.lib) $(file:=-cpp.exp) $(file:=-cpp.lib) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.cpp) $(file:=.obj) $(file:=.lib) $(file:=-cpp.exp) $(file:=-cpp.lib) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "all: \x24(TESTS)\r\n\r" >> $@
-	@echo -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
+	@$(ECHO) -e "all: \x24(TESTS)\r\n\r" >> $@
+	@$(ECHO) -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
 
-	@$(foreach file,$(TESTS),echo -e "$(file:=.exe): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) /Fe\x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.exe): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) /Fe\x24(@) \x24(?)\r\n\r" >> $@;)
+	@$(foreach file,$(TESTS),$(ECHO) -e "$(file:=.exe): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) /Fe\x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.exe): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) /Fe\x24(@) \x24(?)\r\n\r" >> $@;)
 
 Makefile.icl: Makefile
-	@echo -e "# Generated by Makefile. Do not edit.\r" > $@
-	@echo -e "CC = icl\r" >> $@
-	@echo -e "CXX = \x24(CC)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "# Generated by Makefile. Do not edit.\r" > $@
+	@$(ECHO) -e "CC = icl\r" >> $@
+	@$(ECHO) -e "CXX = \x24(CC)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "CFLAGS = /nologo /Wall /wd4464 /wd4514\r" >> $@
-	@echo -e "CXXFLAGS = \x24(CFLAGS)\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "CFLAGS = /nologo /Wall /wd4464 /wd4514\r" >> $@
+	@$(ECHO) -e "CXXFLAGS = \x24(CFLAGS)\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.exe) $(file:=-cpp.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.cpp) $(file:=.obj) $(file:=.lib) $(file:=-cpp.exp) $(file:=-cpp.lib) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.cpp) $(file:=.obj) $(file:=.lib) $(file:=-cpp.exp) $(file:=-cpp.lib) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "all: \x24(TESTS)\r\n\r" >> $@
-	@echo -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
+	@$(ECHO) -e "all: \x24(TESTS)\r\n\r" >> $@
+	@$(ECHO) -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
 
-	@$(foreach file,$(TESTS),echo -e "$(file:=.exe): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) /Fe\x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.exe): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) /Fe\x24(@) \x24(?)\r\n\r" >> $@;)
+	@$(foreach file,$(TESTS),$(ECHO) -e "$(file:=.exe): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) /Fe\x24(@) \x24(?)\r\n$(file:=.cpp): $(file:=.c)\r\n\tcopy /Y \x24(?) \x24(@) >NUL\r\n$(file:=-cpp.exe): $(file:=.cpp)\r\n\t\x24(CXX) \x24(CXXFLAGS) /Fe\x24(@) \x24(?)\r\n\r" >> $@;)
 
 Makefile.pelles: Makefile
-	@echo -e "# Generated by Makefile. Do not edit.\r" > $@
-	@echo -e "CC = pocc\r" >> $@
-	@echo -e "LD = polink\r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "# Generated by Makefile. Do not edit.\r" > $@
+	@$(ECHO) -e "CC = pocc\r" >> $@
+	@$(ECHO) -e "LD = polink\r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "CFLAGS = \r" >> $@
-	@echo -e "LDFLAGS = \r" >> $@
-	@echo -e "\r" >> $@
+	@$(ECHO) -e "CFLAGS = \r" >> $@
+	@$(ECHO) -e "LDFLAGS = \r" >> $@
+	@$(ECHO) -e "\r" >> $@
 
-	@echo -e "TESTS = \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "TESTS = \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
-	@$(foreach file,$(TESTS),echo -e "\t$(file:=.obj) $(file:=.exe) \x5c\r" >> $@;)
-	@echo -e "\t\x24(NULL)\r\n\r" >> $@
+	@$(ECHO) -e "CLEANFILES = \x24(TESTS) \x5c\r" >> $@
+	@$(foreach file,$(TESTS),$(ECHO) -e "\t$(file:=.obj) $(file:=.exe) \x5c\r" >> $@;)
+	@$(ECHO) -e "\t\x24(NULL)\r\n\r" >> $@
 
-	@echo -e "all: \x24(TESTS)\r\n\r" >> $@
-	@echo -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
+	@$(ECHO) -e "all: \x24(TESTS)\r\n\r" >> $@
+	@$(ECHO) -e "clean:\r\n\tdel /Q \x24(CLEANFILES)\r\n\r" >> $@
 
-	@$(foreach file,$(TESTS),echo -e "$(file:=.obj): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) $(file:=.c)\r\n\r\n$(file:=.exe): $(file:=.obj)\r\n\t\x24(LD) \x24(LDFLAGS) /OUT:$(file:=.exe) $(file:=.obj)\r\n\r" >> $@;)
+	@$(foreach file,$(TESTS),$(ECHO) -e "$(file:=.obj): $(file:=.c)\r\n\t\x24(CC) \x24(CFLAGS) $(file:=.c)\r\n\r\n$(file:=.exe): $(file:=.obj)\r\n\t\x24(LD) \x24(LDFLAGS) /OUT:$(file:=.exe) $(file:=.obj)\r\n\r" >> $@;)
 
 clean:
 	rm -f $(CLEANFILES)
 
+maintainer-clean: clean
+	rm -rf $(GENERATED_FILES)
+
 .PHONY: clean all
 
 ifeq ($(notdir $(CC)), gcc)

test/Makefile.icl

@@ -37,6 +37,7 @@ TESTS = \
 	unknown-pragmas.exe unknown-pragmas-cpp.exe \
 	unavailable.exe unavailable-cpp.exe \
 	unreachable.exe unreachable-cpp.exe \
+	unused-function.exe unused-function-cpp.exe \
 	visibility.exe visibility-cpp.exe \
 	warn.exe warn-cpp.exe \
 	warn-unused-result.exe warn-unused-result-cpp.exe \
@@ -74,6 +75,7 @@ TESTS = \
 	unknown-pragmas.exe unknown-pragmas-cpp.exe \
 	unavailable.exe unavailable-cpp.exe \
 	unreachable.exe unreachable-cpp.exe \
+	unused-function.exe unused-function-cpp.exe \
 	visibility.exe visibility-cpp.exe \
 	warn.exe warn-cpp.exe \
 	warn-unused-result.exe warn-unused-result-cpp.exe \
@@ -111,6 +113,7 @@ CLEANFILES = $(TESTS) \
 	unknown-pragmas.cpp unknown-pragmas.obj unknown-pragmas.lib unknown-pragmas-cpp.exp unknown-pragmas-cpp.lib \
 	unavailable.cpp unavailable.obj unavailable.lib unavailable-cpp.exp unavailable-cpp.lib \
 	unreachable.cpp unreachable.obj unreachable.lib unreachable-cpp.exp unreachable-cpp.lib \
+	unused-function.cpp unused-function.obj unused-function.lib unused-function-cpp.exp unused-function-cpp.lib \
 	visibility.cpp visibility.obj visibility.lib visibility-cpp.exp visibility-cpp.lib \
 	warn.cpp warn.obj warn.lib warn-cpp.exp warn-cpp.lib \
 	warn-unused-result.cpp warn-unused-result.obj warn-unused-result.lib warn-unused-result-cpp.exp warn-unused-result-cpp.lib \
@@ -338,6 +341,13 @@ unreachable.cpp: unreachable.c
 unreachable-cpp.exe: unreachable.cpp
 	$(CXX) $(CXXFLAGS) /Fe$(@) $(?)
 
+unused-function.exe: unused-function.c
+	$(CC) $(CFLAGS) /Fe$(@) $(?)
+unused-function.cpp: unused-function.c
+	copy /Y $(?) $(@) >NUL
+unused-function-cpp.exe: unused-function.cpp
+	$(CXX) $(CXXFLAGS) /Fe$(@) $(?)
+
 visibility.exe: visibility.c
 	$(CC) $(CFLAGS) /Fe$(@) $(?)
 visibility.cpp: visibility.c