bootstrap.c: Port to Windows.

Author: alexrp

bootstrap.c

@@ -3,31 +3,64 @@
 #include <stdlib.h>
 #include <stdbool.h>
 
+#if defined(_WIN32)
+
+#include <process.h>
+#include <windows.h>
+
+#else
+
+#include <unistd.h>
+#include <errno.h>
+#include <sys/wait.h>
+
+#endif
+
 static const char *get_c_compiler(void) {
     const char *cc = getenv("CC");
-    return (cc == NULL) ? "cc" : cc;
+    if (cc != NULL) return cc;
+#if defined(_MSC_VER)
+    return "cl";
+#else
+    return "cc";
+#endif
 }
 
 static void panic(const char *reason) {
-    fprintf(stderr, "%s\n", reason);
+    fprintf(
+        stderr,
+        "%s (%d)\n",
+        reason,
+#if defined(_WIN32)
+        (int)GetLastError()
+#else
+        errno
+#endif
+    );
     abort();
 }
 
-#if defined(__WIN32__)
-#error TODO write the functionality for executing child process into this build script
-#else
+#if defined(_WIN32)
 
-#include <unistd.h>
-#include <errno.h>
-#include <sys/wait.h>
+static void run(const char *const *argv) {
+    intptr_t status = _spawnv(_P_WAIT, argv[0], argv);
+
+    if (status == -1)
+        panic("_spawnv failed");
+
+    if (status != 0)
+        panic("child process failed");
+}
+
+#else
 
-static void run(char **argv) {
+static void run(const char *const *argv) {
     pid_t pid = fork();
     if (pid == -1)
         panic("fork failed");
     if (pid == 0) {
         // child
-        execvp(argv[0], argv);
+        execvp(argv[0], (char *const *)argv);
         exit(1);
     }
 
@@ -44,19 +77,19 @@ static void run(char **argv) {
 }
 #endif
 
-static void print_and_run(const char **argv) {
+static void print_and_run(const char *const *argv) {
     fprintf(stderr, "%s", argv[0]);
-    for (const char **arg = argv + 1; *arg; arg += 1) {
+    for (const char *const *arg = argv + 1; *arg; arg += 1) {
         fprintf(stderr, " %s", *arg);
     }
     fprintf(stderr, "\n");
-    run((char **)argv);
+    run(argv);
 }
 
 static const char *get_host_os(void) {
     const char *host_os = getenv("ZIG_HOST_TARGET_OS");
     if (host_os != NULL) return host_os;
-#if defined(__WIN32__)
+#if defined(_WIN32)
     return "windows";
 #elif defined(__APPLE__)
     return "macos";
@@ -74,9 +107,9 @@ static const char *get_host_os(void) {
 static const char *get_host_arch(void) {
     const char *host_arch = getenv("ZIG_HOST_TARGET_ARCH");
     if (host_arch != NULL) return host_arch;
-#if defined(__x86_64__ )
+#if defined(__x86_64__) || defined(_M_X64)
     return "x86_64";
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) || defined(_M_ARM64)
     return "aarch64";
 #else
     panic("unknown host arch, specify with ZIG_HOST_TARGET_ARCH");
@@ -85,7 +118,12 @@ static const char *get_host_arch(void) {
 
 static const char *get_host_abi(void) {
     const char *host_abi = getenv("ZIG_HOST_TARGET_ABI");
-    return (host_abi == NULL) ? "" : host_abi;
+    if (host_abi != NULL) return host_abi;
+#if defined(_MSC_VER)
+    return "-msvc";
+#else
+    return "";
+#endif
 }
 
 static const char *get_host_triple(void) {
@@ -102,7 +140,19 @@ int main(int argc, char **argv) {
 
     {
         const char *child_argv[] = {
-            cc, "-o", "zig-wasm2c", "stage1/wasm2c.c", "-O2", "-std=c99", NULL,
+            cc,
+#if defined(_MSC_VER)
+            "stage1/wasm2c.c",
+            "/O2",
+            "/link",
+            "/out:zig-wasm2c.exe",
+#else
+            "-std=c99",
+            "stage1/wasm2c.c",
+            "-O2",
+            "-o", "zig-wasm2c",
+#endif
+            NULL,
         };
         print_and_run(child_argv);
     }
@@ -114,7 +164,22 @@ int main(int argc, char **argv) {
     }
     {
         const char *child_argv[] = {
-            cc, "-o", "zig1", "zig1.c", "stage1/wasi.c", "-std=c99", "-Os", "-lm", NULL,
+            cc,
+#if defined(_MSC_VER)
+            "zig1.c",
+            "stage1/wasi.c",
+            "/Os",
+            "/link",
+            "/out:zig1.exe",
+#else
+            "-std=c99",
+            "zig1.c",
+            "stage1/wasi.c",
+            "-Os",
+            "-lm",
+            "-o", "zig1",
+#endif
+            NULL,
         };
         print_and_run(child_argv);
     }
@@ -151,14 +216,17 @@ int main(int argc, char **argv) {
     {
         const char *child_argv[] = {
             "./zig1", "lib", "build-exe",
-            "-ofmt=c", "-lc", "-OReleaseSmall",
-            "--name", "zig2", "-femit-bin=zig2.c",
-            "-target", host_triple,
+            "--name", "zig2",
             "--dep", "build_options",
             "--dep", "aro",
             "-Mroot=src/main.zig",
             "-Mbuild_options=config.zig",
             "-Maro=lib/compiler/aro/aro.zig",
+            "-OReleaseSmall",
+            "-target", host_triple,
+            "-lc",
+            "-ofmt=c",
+            "-femit-bin=zig2.c",
             NULL,
         };
         print_and_run(child_argv);
@@ -167,27 +235,46 @@ int main(int argc, char **argv) {
     {
         const char *child_argv[] = {
             "./zig1", "lib", "build-obj",
-            "-ofmt=c", "-OReleaseSmall",
-            "--name", "compiler_rt", "-femit-bin=compiler_rt.c",
-            "-target", host_triple,
+            "--name", "compiler_rt",
             "-Mroot=lib/compiler_rt.zig",
+            "-OReleaseSmall",
+            "-target", host_triple,
+            "-ofmt=c",
+            "-femit-bin=compiler_rt.c",
             NULL,
         };
         print_and_run(child_argv);
     }
 
     {
         const char *child_argv[] = {
-            cc, "-o", "zig2", "zig2.c", "compiler_rt.c",
-            "-std=c99", "-O2", "-fno-stack-protector",
+            cc,
+#if defined(_MSC_VER)
+            "/Istage1",
+            "zig2.c",
+            "compiler_rt.c",
+            "/O2",
+            "/GS-",
+            "/Gs0x10000000",
+            "/link",
+            "/stack:0x10000000,0x10000000",
+            "/out:zig2.exe",
+#else
             "-Istage1",
+            "-std=c99",
+#if defined(__GNUC__)
+            "-pthread",
+#endif
+            "zig2.c",
+            "compiler_rt.c",
+            "-O2",
+            "-fno-stack-protector",
 #if defined(__APPLE__)
             "-Wl,-stack_size,0x10000000",
 #else
             "-Wl,-z,stack-size=0x10000000",
 #endif
-#if defined(__GNUC__)
-            "-pthread",
+            "-o", "zig2",
 #endif
             NULL,
         };