Make symbol-visibility test case work on all platforms.

src/test/run-make/symbol-visibility/Makefile

@@ -1,26 +1,50 @@
 include ../tools.mk
 
+ifdef IS_WINDOWS
+# Do nothing on MSVC.
+# On MINGW the --version-script, --dynamic-list, and --retain-symbol args don't
+# seem to work reliably.
+all:
+	exit 0
+else
+
+NM=nm -D
+DYLIB_EXT=so
+CDYLIB_NAME=liba_cdylib.so
+RDYLIB_NAME=liba_rust_dylib.so
+EXE_NAME=an_executable
+
+ifeq ($(UNAME),Darwin)
+NM=nm -gU
+DYLIB_EXT=dylib
+CDYLIB_NAME=liba_cdylib.dylib
+RDYLIB_NAME=liba_rust_dylib.dylib
+EXE_NAME=an_executable
+endif
+
 all:
 	$(RUSTC) an_rlib.rs
 	$(RUSTC) a_cdylib.rs
 	$(RUSTC) a_rust_dylib.rs
 	$(RUSTC) an_executable.rs
 
 	# Check that a cdylib exports its public #[no_mangle] functions
-	[ "$$(nm -D $(TMPDIR)/liba_cdylib.so | grep -c public_c_function_from_cdylib)" -eq "1" ]
+	[ "$$($(NM) $(TMPDIR)/$(CDYLIB_NAME) | grep -c public_c_function_from_cdylib)" -eq "1" ]
 	# Check that a cdylib exports the public #[no_mangle] functions of dependencies
-	[ "$$(nm -D $(TMPDIR)/liba_cdylib.so | grep -c public_c_function_from_rlib)" -eq "1" ]
+	[ "$$($(NM) $(TMPDIR)/$(CDYLIB_NAME) | grep -c public_c_function_from_rlib)" -eq "1" ]
 	# Check that a cdylib DOES NOT export any public Rust functions
-	[ "$$(nm -D $(TMPDIR)/liba_cdylib.so | grep -c _ZN.*h.*E)" -eq "0" ]
+	[ "$$($(NM) $(TMPDIR)/$(CDYLIB_NAME) | grep -c _ZN.*h.*E)" -eq "0" ]
 
 	# Check that a Rust dylib exports its monomorphic functions
-	[ "$$(nm -D $(TMPDIR)/liba_rust_dylib.so | grep -c public_c_function_from_rust_dylib)" -eq "1" ]
-	[ "$$(nm -D $(TMPDIR)/liba_rust_dylib.so | grep -c _ZN.*public_rust_function_from_rust_dylib.*E)" -eq "1" ]
+	[ "$$($(NM) $(TMPDIR)/$(RDYLIB_NAME) | grep -c public_c_function_from_rust_dylib)" -eq "1" ]
+	[ "$$($(NM) $(TMPDIR)/$(RDYLIB_NAME) | grep -c _ZN.*public_rust_function_from_rust_dylib.*E)" -eq "1" ]
 
 	# Check that a Rust dylib exports the monomorphic functions from its dependencies
-	[ "$$(nm -D $(TMPDIR)/liba_rust_dylib.so | grep -c public_c_function_from_rlib)" -eq "1" ]
-	[ "$$(nm -D $(TMPDIR)/liba_rust_dylib.so | grep -c public_rust_function_from_rlib)" -eq "1" ]
+	[ "$$($(NM) $(TMPDIR)/$(RDYLIB_NAME) | grep -c public_c_function_from_rlib)" -eq "1" ]
+	[ "$$($(NM) $(TMPDIR)/$(RDYLIB_NAME) | grep -c public_rust_function_from_rlib)" -eq "1" ]
 
 	# Check that an executable does not export any dynamic symbols
-	[ "$$(nm -D $(TMPDIR)/an_executable | grep -c public_c_function_from_rlib)" -eq "0" ]
-	[ "$$(nm -D $(TMPDIR)/an_executable | grep -c public_rust_function_from_exe)" -eq "0" ]
+	[ "$$($(NM) $(TMPDIR)/$(EXE_NAME) | grep -c public_c_function_from_rlib)" -eq "0" ]
+	[ "$$($(NM) $(TMPDIR)/$(EXE_NAME) | grep -c public_rust_function_from_exe)" -eq "0" ]
+
+endif