volpath, _ := getTestPaths(base)
				subpath := filepath.Join(volpath, "dir0")
				return nil, volpath, subpath, os.MkdirAll(subpath, defaultPerm)
			},
			expectError: false,
		},
		{
			name: "subpath-dir-symlink",
			prepare: func(base string) ([]string, string, string, error) {
				volpath, _ := getTestPaths(base)
				subpath := filepath.Join(volpath, "dir0")
				if err := os.MkdirAll(subpath, defaultPerm); err != nil {

	CR4:  "CR4",
	CR5:  "CR5",
	CR6:  "CR6",
	CR7:  "CR7",
	CR8:  "CR8",
	CR9:  "CR9",
	CR10: "CR10",
	CR11: "CR11",
	CR12: "CR12",
	CR13: "CR13",
	CR14: "CR14",
	CR15: "CR15",
	DR0:  "DR0",
	DR1:  "DR1",
	DR2:  "DR2",
	DR3:  "DR3",
	DR4:  "DR4",
	DR5:  "DR5",
	DR6:  "DR6",
	DR7:  "DR7",
	DR8:  "DR8",
	DR9:  "DR9",
	DR10: "DR10",
	DR11: "DR11",
	DR12: "DR12",

		{[]string{"192.168.1.210:9000/tmp/dir0", "192.168.1.210:9000/tmp/dir1", "192.168.1.210:9000/tmp/dir2", "192.168.110:9000/tmp/dir3"}, fmt.Errorf("'192.168.1.210:9000/tmp/dir0': invalid URL endpoint format: missing scheme http or https")},
	}

	for _, testCase := range testCases {
		_, err := NewEndpoints(testCase.args...)

	if _, err := exec.LookPath("gcc"); err != nil {
		t.Skip("skipping test: gcc is missing")
	}

	tmpdir := t.TempDir()

	dir0, err := os.Getwd()
	if err != nil {
		t.Fatal(err)
	}
	defer os.Chdir(dir0)

	const src = `
#include <stdint.h>
#include <windows.h>

uintptr_t cfunc(void) {
   SetLastError(123);
   return 0;
}
`

	CR4:  "%cr4",
	CR5:  "%cr5",
	CR6:  "%cr6",
	CR7:  "%cr7",
	CR8:  "%cr8",
	CR9:  "%cr9",
	CR10: "%cr10",
	CR11: "%cr11",
	CR12: "%cr12",
	CR13: "%cr13",
	CR14: "%cr14",
	CR15: "%cr15",
	DR0:  "%db0",
	DR1:  "%db1",
	DR2:  "%db2",
	DR3:  "%db3",
	DR4:  "%db4",
	DR5:  "%db5",
	DR6:  "%db6",
	DR7:  "%db7",
	TR0:  "%tr0",
	TR1:  "%tr1",
	TR2:  "%tr2",
	TR3:  "%tr3",

	xArg3            // arg 3
	xArgAL           // arg AL
	xArgAX           // arg AX
	xArgCL           // arg CL
	xArgCR0dashCR7   // arg CR0-CR7
	xArgCS           // arg CS
	xArgDR0dashDR7   // arg DR0-DR7
	xArgDS           // arg DS
	xArgDX           // arg DX
	xArgEAX          // arg EAX
	xArgEDX          // arg EDX
	xArgES           // arg ES
	xArgFS           // arg FS
	xArgGS           // arg GS