make new extern functions compile on windows

crates/cli/tests/fixtures/multi-dep-str/platform/host.zig

@@ -74,6 +74,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }
@@ -91,6 +95,10 @@ comptime {
         @export(roc_send_signal, .{ .name = "roc_send_signal", .linkage = .Strong });
         @export(roc_shm_open, .{ .name = "roc_shm_open", .linkage = .Strong });
     }
+
+    if (builtin.os.tag == .windows) {
+        @export(roc_getppid_windows_stub, .{ .name = "roc_getppid", .linkage = .Strong });
+    }
 }
 
 const Unit = extern struct {};

crates/cli/tests/fixtures/multi-dep-thunk/platform/host.zig

@@ -73,6 +73,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }
@@ -90,6 +94,10 @@ comptime {
         @export(roc_send_signal, .{ .name = "roc_send_signal", .linkage = .Strong });
         @export(roc_shm_open, .{ .name = "roc_shm_open", .linkage = .Strong });
     }
+
+    if (builtin.os.tag == .windows) {
+        @export(roc_getppid_windows_stub, .{ .name = "roc_getppid", .linkage = .Strong });
+    }
 }
 
 const Unit = extern struct {};

crates/cli_testing_examples/algorithms/fibonacci-platform/host.zig

@@ -90,6 +90,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }

crates/cli_testing_examples/algorithms/quicksort-platform/host.zig

@@ -89,6 +89,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }
@@ -106,6 +110,10 @@ comptime {
         @export(roc_send_signal, .{ .name = "roc_send_signal", .linkage = .Strong });
         @export(roc_shm_open, .{ .name = "roc_shm_open", .linkage = .Strong });
     }
+
+    if (builtin.os.tag == .windows) {
+        @export(roc_getppid_windows_stub, .{ .name = "roc_getppid", .linkage = .Strong });
+    }
 }
 
 // warning! the array is currently stack-allocated so don't make this too big

crates/cli_testing_examples/benchmarks/platform/host.zig

@@ -94,6 +94,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }
@@ -111,6 +115,10 @@ comptime {
         @export(roc_send_signal, .{ .name = "roc_send_signal", .linkage = .Strong });
         @export(roc_shm_open, .{ .name = "roc_shm_open", .linkage = .Strong });
     }
+
+    if (builtin.os.tag == .windows) {
+        @export(roc_getppid_windows_stub, .{ .name = "roc_getppid", .linkage = .Strong });
+    }
 }
 
 const Unit = extern struct {};

crates/compiler/builtins/bitcode/src/utils.zig

@@ -30,6 +30,11 @@ extern fn getppid() c_int;
 fn testing_roc_getppid() callconv(.C) c_int {
     return getppid();
 }
+
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn testing_roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }

examples/cli/tui-platform/host.zig

@@ -153,6 +153,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }
@@ -170,6 +174,10 @@ comptime {
         @export(roc_send_signal, .{ .name = "roc_send_signal", .linkage = .Strong });
         @export(roc_shm_open, .{ .name = "roc_shm_open", .linkage = .Strong });
     }
+
+    if (builtin.os.tag == .windows) {
+        @export(roc_getppid_windows_stub, .{ .name = "roc_getppid", .linkage = .Strong });
+    }
 }
 
 const Unit = extern struct {};

examples/platform-switching/zig-platform/host.zig

@@ -84,6 +84,10 @@ fn roc_getppid() callconv(.C) c_int {
     return getppid();
 }
 
+fn roc_getppid_windows_stub() callconv(.C) c_int {
+    return 0;
+}
+
 fn roc_send_signal(pid: c_int, sig: c_int) callconv(.C) c_int {
     return kill(pid, sig);
 }
@@ -101,6 +105,10 @@ comptime {
         @export(roc_send_signal, .{ .name = "roc_send_signal", .linkage = .Strong });
         @export(roc_shm_open, .{ .name = "roc_shm_open", .linkage = .Strong });
     }
+
+    if (builtin.os.tag == .windows) {
+        @export(roc_getppid_windows_stub, .{ .name = "roc_getppid", .linkage = .Strong });
+    }
 }
 
 const mem = std.mem;