Use $(MAKE) instead of make in Makefiles and fragments

Makefile

@@ -90,7 +90,7 @@ all: distro static test coverage analyze
 # Run regression tests
 .PHONY: test
 test:
-	make -C test run
+	$(MAKE) -C test run
 
 # Perform checks (test + analyze)
 .PHONY: check
@@ -99,13 +99,13 @@ check: test analyze
 # Measure test coverage (on test set of files only)
 .PHONY: coverage
 coverage:
-	make -C test coverage
+	$(MAKE) -C test coverage
 
 # Remove intermediates
 .PHONY: clean
 clean:
 	rm -f $(OBJECTS) README-orig.md $(BIN)/cio_file gmon.out
-	make -C test clean
+	$(MAKE) -C test clean
 
 # Remove all generated files
 .PHONY: distclean

build.mk

@@ -12,7 +12,7 @@ $(OBJ)/%.o: $(SRC)/%.c $(OBJ) Makefile
 
 # Share library recipe
 $(LIB)/%.so.$(SO_VERSION):
-	@make $(LIB)
+	@$(MAKE) $(LIB)
 	$(CC) -o $@ $(CPPFLAGS) $(CFLAGS) $^ -shared -fPIC -Wl,-soname,$(subst $(LIB)/,,$@) $(LDFLAGS)
 
 # Unversioned shared libs (for linking against)
@@ -22,7 +22,7 @@ $(LIB)/lib%.so:
 
 # Static library recipe
 $(LIB)/%.a:
-	@make $(LIB)
+	@$(MAKE) $(LIB)
 	ar -rc $@ $^
 	ranlib $@
 
@@ -58,7 +58,7 @@ analyze:
 # Static code analysis viacat Facebook's infer
 .PHONY: infer
 infer: clean
-	infer run -- make shared
+	infer run -- $(MAKE) shared
 
 # Doxygen documentation (HTML and man pages) under apidocs/
 .PHONY: dox