Merge f408856715 into 87863a834b

2024-11-26 15:12:31 +00:00 · 2024-11-26 21:40:17 +08:00 · 2024-11-26 21:40:17 +08:00 · 2c34fb7a3f
commit 2c34fb7a3f
parent 87863a834b f408856715
3 changed files with 259 additions and 120 deletions
--- a/bootstrap.c
+++ b/bootstrap.c
@ -1,62 +1,129 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
+// Bootstrap the self-hosted Zig compiler using a C compiler.
+//
+// Some ways to run this program:
+//
+// $ tcc -run bootstrap.c
+// $ cc bootstrap.c -o bootstrap && ./bootstrap
+// $ clang bootstrap.c -o bootstrap && CC=clang ./bootstrap
+// $ cl.exe bootstrap.c /link /out:bootstrap.exe && .\bootstrap.exe
+//
+// This program will try its best to invoke the same C compiler that it was
+// built with. To override this behavior, set the CC environment variable.
+//
+// The following environment variables can be set to override the target
+// triple detection for the system this program runs on (the host):
+//
+// * ZIG_HOST_TARGET_ARCH
+// * ZIG_HOST_TARGET_OS
+// * ZIG_HOST_TARGET_ABI
+// * ZIG_HOST_TARGET_TRIPLE (overrides all of the above)
+
+#include <stdarg.h>
 #include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(_WIN32)
+#include <process.h>
+#else
+#include <errno.h>
+#include <sys/wait.h>
+#include <unistd.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);
+static void panic(const char *format, ...) {
+    fputs("panic: ", stderr);
+    va_list vargs;
+    va_start(vargs, format);
+    vfprintf(stderr, format, vargs);
+    va_end(vargs);
+    fputs("\n", stderr);
    abort();
 }

-#if defined(__WIN32__)
-#error TODO write the functionality for executing child process into this build script
-#else
-
-#include <unistd.h>
-#include <errno.h>
-#include <sys/wait.h>
-
-static void run(char **argv) {
-    pid_t pid = fork();
-    if (pid == -1)
-        panic("fork failed");
-    if (pid == 0) {
-        // child
-        execvp(argv[0], argv);
-        exit(1);
-    }
-
-    // parent
-
-    int status;
-    waitpid(pid, &status, 0);
-
-    if (!WIFEXITED(status))
-        panic("child process crashed");
-
-    if (WEXITSTATUS(status) != 0)
-        panic("child process failed");
+static void error(const char *format, ...) {
+    fputs("error: ", stderr);
+    va_list vargs;
+    va_start(vargs, format);
+    vfprintf(stderr, format, vargs);
+    va_end(vargs);
+    fprintf(stderr, " = %d (%s)\n", errno, strerror(errno));
+    exit(1);
 }
-#endif

-static void print_and_run(const char **argv) {
+static void fatal(const char *format, ...) {
+    fputs("fatal: ", stderr);
+    va_list vargs;
+    va_start(vargs, format);
+    vfprintf(stderr, format, vargs);
+    va_end(vargs);
+    fputs("\n", stderr);
+    exit(1);
+}
+
+static void usage(const char *message) {
+    fprintf(stderr, "%s\n", message);
+    exit(2);
+}
+
+static void run(const char *const *argv) {
+#if defined(_WIN32)
+    intptr_t status = _spawnvp(_P_WAIT, argv[0], argv);
+    switch (status) {
+        case -1: error("_spawnvp(_P_WAIT, %s, ...)", argv[0]); break;
+        case 0: break;
+        default: fatal("child process failed: %d", status); break;
+    }
+#else
+    pid_t pid = fork();
+    switch (pid) {
+        case -1: error("fork()"); break;
+        case 0: {
+            // child
+            execvp(argv[0], (char *const *)argv);
+            panic("execve(%s, ...) returned", argv[0]);
+
+            break;
+        }
+        default: {
+            // parent
+            int wstatus;
+            if (waitpid(pid, &wstatus, 0) == -1) error("waitpid(%d, ..., 0)", pid);
+            if (!WIFEXITED(wstatus)) fatal("child process crashed");
+
+            int status = WEXITSTATUS(wstatus);
+            if (status != 0) fatal("child process failed: %d", status);
+
+            break;
+        }
+    }
+#endif
+}
+
+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++) {
        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";
@ -67,25 +134,30 @@ static const char *get_host_os(void) {
 #elif defined(__HAIKU__)
    return "haiku";
 #else
-    panic("unknown host os, specify with ZIG_HOST_TARGET_OS");
+    usage("unknown host OS; specify with environment variable ZIG_HOST_TARGET_OS");
 #endif
 }

 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");
+    usage("unknown host architecture; specify with environment variable ZIG_HOST_TARGET_ARCH");
 #endif
 }

 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) {
@ -100,28 +172,58 @@ int main(int argc, char **argv) {
    const char *cc = get_c_compiler();
    const char *host_triple = get_host_triple();

-    {
-        const char *child_argv[] = {
-            cc, "-o", "zig-wasm2c", "stage1/wasm2c.c", "-O2", "-std=c99", NULL,
-        };
-        print_and_run(child_argv);
-    }
-    {
-        const char *child_argv[] = {
-            "./zig-wasm2c", "stage1/zig1.wasm", "zig1.c", NULL,
-        };
-        print_and_run(child_argv);
-    }
-    {
-        const char *child_argv[] = {
-            cc, "-o", "zig1", "zig1.c", "stage1/wasi.c", "-std=c99", "-Os", "-lm", NULL,
-        };
-        print_and_run(child_argv);
-    }
+    print_and_run((const char *[]) {
+        cc,
+#if defined(_MSC_VER)
+        "/nologo",
+        "stage1/wasm2c.c",
+        "/O2",
+        "/link",
+        "/OUT:zig-wasm2c.exe",
+#else
+        "stage1/wasm2c.c",
+        "-std=c99",
+        "-O2",
+        "-o", "zig-wasm2c",
+#endif
+        NULL,
+    });
+
+    print_and_run((const char *[]) {
+        "./zig-wasm2c", "stage1/zig1.wasm", "zig1.c",
+        NULL,
+    });
+
+    print_and_run((const char *[]) {
+        cc,
+#if defined(_MSC_VER)
+        "/nologo",
+        "zig1.c",
+        "stage1/wasi.c",
+        "/O1",
+        "/link",
+        "/STACK:0x4000000,0x4000000",
+        "/OUT:zig1.exe",
+#else
+        "zig1.c",
+        "stage1/wasi.c",
+        "-std=c99",
+        "-Os",
+        "-lm",
+#if defined(__APPLE__)
+        "-Wl,-stack_size,0x1000000",
+#else
+        "-Wl,-z,stack-size=0x1000000",
+#endif
+        "-o", "zig1",
+#endif
+        NULL,
+    });
+
    {
        FILE *f = fopen("config.zig", "wb");
        if (f == NULL)
-            panic("unable to open config.zig for writing");
+            error("fopen(\"config.zig\", \"wb\")");

        const char *zig_version = "0.14.0-dev.bootstrap";

@ -145,52 +247,65 @@ int main(int argc, char **argv) {
        if (written < 100)
            panic("unable to write to config.zig file");
        if (fclose(f) != 0)
-            panic("unable to finish writing to config.zig file");
+            error("fclose(\"config.zig\")");
    }

-    {
-        const char *child_argv[] = {
-            "./zig1", "lib", "build-exe",
-            "-ofmt=c", "-lc", "-OReleaseSmall",
-            "--name", "zig2", "-femit-bin=zig2.c",
-            "-target", host_triple,
-            "--dep", "build_options",
-            "--dep", "aro",
-            "-Mroot=src/main.zig",
-            "-Mbuild_options=config.zig",
-            "-Maro=lib/compiler/aro/aro.zig",
-            NULL,
-        };
-        print_and_run(child_argv);
-    }
+    print_and_run((const char *[]) {
+        "./zig1", "lib", "build-exe",
+        "-OReleaseSmall",
+        "-target", host_triple,
+        "-lc",
+        "-ofmt=c",
+        "-femit-bin=zig2.c",
+        "--name", "zig2",
+        "--dep", "build_options",
+        "--dep", "aro",
+        "-Mroot=src/main.zig",
+        "-Mbuild_options=config.zig",
+        "-Maro=lib/compiler/aro/aro.zig",
+        NULL,
+    });

-    {
-        const char *child_argv[] = {
-            "./zig1", "lib", "build-obj",
-            "-ofmt=c", "-OReleaseSmall",
-            "--name", "compiler_rt", "-femit-bin=compiler_rt.c",
-            "-target", host_triple,
-            "-Mroot=lib/compiler_rt.zig",
-            NULL,
-        };
-        print_and_run(child_argv);
-    }
+    print_and_run((const char *[]) {
+        "./zig1", "lib", "build-obj",
+        "-OReleaseSmall",
+        "-target", host_triple,
+        "-ofmt=c",
+        "-femit-bin=compiler_rt.c",
+        "--name", "compiler_rt",
+        "-Mroot=lib/compiler_rt.zig",
+        NULL,
+    });

-    {
-        const char *child_argv[] = {
-            cc, "-o", "zig2", "zig2.c", "compiler_rt.c",
-            "-std=c99", "-O2", "-fno-stack-protector",
-            "-Istage1",
-#if defined(__APPLE__)
-            "-Wl,-stack_size,0x10000000",
+    print_and_run((const char *[]) {
+        cc,
+#if defined(_MSC_VER)
+        "/nologo",
+        "zig2.c",
+        "compiler_rt.c",
+        "/Istage1",
+        "/O2",
+        "/GS-",
+        "/link",
+        "/STACK:0x10000000,0x10000000",
+        "/OUT:zig2.exe",
 #else
-            "-Wl,-z,stack-size=0x10000000",
-#endif
+        "zig2.c",
+        "compiler_rt.c",
+        "-Istage1",
+        "-std=c99",
 #if defined(__GNUC__)
-            "-pthread",
+        "-pthread",
 #endif
-            NULL,
-        };
-        print_and_run(child_argv);
-    }
+        "-O2",
+        "-fno-stack-protector",
+#if defined(__APPLE__)
+        "-Wl,-stack_size,0x10000000",
+#else
+        "-Wl,-z,stack-size=0x10000000",
+#endif
+        "-o", "zig2",
+#endif
+        NULL,
+    });
 }
--- a/ci/x86_64-windows-debug.ps1
+++ b/ci/x86_64-windows-debug.ps1
@ -30,6 +30,26 @@ if ((git rev-parse --is-shallow-repository) -eq "true") {
    git fetch --unshallow # `git describe` won't work on a shallow repo
 }

+Import-Module "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\Microsoft.VisualStudio.DevShell.dll"
+CheckLastExitCode
+
+Enter-VsDevShell -VsInstallPath "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools" `
+  -DevCmdArguments '-arch=x64 -no_logo' `
+  -StartInPath $(Get-Location)
+CheckLastExitCode
+
+# Test building from source without LLVM.
+git clean -fd
+Remove-Item -Path 'zig-out' -Recurse -Force -ErrorAction Ignore
+cl -nologo bootstrap.c /link /OUT:bootstrap.exe
+CheckLastExitCode
+.\bootstrap
+CheckLastExitCode
+.\zig2 build -Dno-lib
+CheckLastExitCode
+.\zig-out\bin\zig test test\behavior.zig
+CheckLastExitCode
+
 Write-Output "Building from source..."
 Remove-Item -Path 'build-debug' -Recurse -Force -ErrorAction Ignore
 New-Item -Path 'build-debug' -ItemType Directory
@ -94,14 +114,6 @@ CheckLastExitCode
  -Mbuild_options="config.zig"
 CheckLastExitCode

-Import-Module "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\Microsoft.VisualStudio.DevShell.dll"
-CheckLastExitCode
-
-Enter-VsDevShell -VsInstallPath "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools" `
-  -DevCmdArguments '-arch=x64 -no_logo' `
-  -StartInPath $(Get-Location)
-CheckLastExitCode
-
 Write-Output "Build and run behavior tests with msvc..."
 & cl.exe -I..\lib test-x86_64-windows-msvc.c compiler_rt-x86_64-windows-msvc.c /W3 /Z7 -link -nologo -debug -subsystem:console kernel32.lib ntdll.lib libcmt.lib
 CheckLastExitCode
--- a/ci/x86_64-windows-release.ps1
+++ b/ci/x86_64-windows-release.ps1
@ -30,6 +30,26 @@ if ((git rev-parse --is-shallow-repository) -eq "true") {
    git fetch --unshallow # `git describe` won't work on a shallow repo
 }

+Import-Module "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\Microsoft.VisualStudio.DevShell.dll"
+CheckLastExitCode
+
+Enter-VsDevShell -VsInstallPath "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools" `
+  -DevCmdArguments '-arch=x64 -no_logo' `
+  -StartInPath $(Get-Location)
+CheckLastExitCode
+
+# Test building from source without LLVM.
+git clean -fd
+Remove-Item -Path 'zig-out' -Recurse -Force -ErrorAction Ignore
+cl -nologo bootstrap.c /link /OUT:bootstrap.exe
+CheckLastExitCode
+.\bootstrap
+CheckLastExitCode
+.\zig2 build -Dno-lib
+CheckLastExitCode
+.\zig-out\bin\zig test test\behavior.zig
+CheckLastExitCode
+
 Write-Output "Building from source..."
 Remove-Item -Path 'build-release' -Recurse -Force -ErrorAction Ignore
 New-Item -Path 'build-release' -ItemType Directory
@ -112,14 +132,6 @@ CheckLastExitCode
  -Mbuild_options="config.zig"
 CheckLastExitCode

-Import-Module "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\Microsoft.VisualStudio.DevShell.dll"
-CheckLastExitCode
-
-Enter-VsDevShell -VsInstallPath "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools" `
-  -DevCmdArguments '-arch=x64 -no_logo' `
-  -StartInPath $(Get-Location)
-CheckLastExitCode
-
 Write-Output "Build and run behavior tests with msvc..."
 & cl.exe -I..\lib test-x86_64-windows-msvc.c compiler_rt-x86_64-windows-msvc.c /W3 /Z7 -link -nologo -debug -subsystem:console kernel32.lib ntdll.lib libcmt.lib
 CheckLastExitCode