zig

blob fdcae4e1 (5610B) - Raw

---

 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <stdbool.h>
 
 static const char *get_c_compiler(void) {
     const char *cc = getenv("CC");
     return (cc == NULL) ? "cc" : cc;
 }
 
 static void panic(const char *reason) {
     fprintf(stderr, "%s\n", reason);
     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");
 }
 #endif
 
 static void print_and_run(const char **argv) {
     fprintf(stderr, "%s", argv[0]);
     for (const char **arg = argv + 1; *arg; arg += 1) {
         fprintf(stderr, " %s", *arg);
     }
     fprintf(stderr, "\n");
     run((char **)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__)
     return "windows";
 #elif defined(__APPLE__)
     return "macos";
 #elif defined(__linux__)
     return "linux";
 #elif defined(__FreeBSD__)
     return "freebsd";
 #else
     panic("unknown host os, specify with 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__ )
     return "x86_64";
 #elif defined(__aarch64__)
     return "aarch64";
 #else
     panic("unknown host arch, specify with 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;
 }
 
 static const char *get_host_triple(void) {
     const char *host_triple = getenv("ZIG_HOST_TARGET_TRIPLE");
     if (host_triple != NULL) return host_triple;
     static char global_buffer[100];
     sprintf(global_buffer, "%s-%s%s", get_host_arch(), get_host_os(), get_host_abi());
     return global_buffer;
 }
 
 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);
     }
     {
         FILE *f = fopen("config.zig", "wb");
         if (f == NULL)
             panic("unable to open config.zig for writing");
 
         const char *zig_version = "0.12.0-dev.bootstrap";
 
         int written = fprintf(f,
             "pub const have_llvm = false;\n"
             "pub const llvm_has_m68k = false;\n"
             "pub const llvm_has_csky = false;\n"
             "pub const llvm_has_arc = false;\n"
             "pub const llvm_has_xtensa = false;\n"
             "pub const version: [:0]const u8 = \"%s\";\n"
             "pub const semver = @import(\"std\").SemanticVersion.parse(version) catch unreachable;\n"
             "pub const enable_debug_extensions = false;\n"
             "pub const enable_logging = false;\n"
             "pub const enable_link_snapshots = false;\n"
             "pub const enable_tracy = false;\n"
             "pub const value_tracing = false;\n"
             "pub const skip_non_native = false;\n"
             "pub const force_gpa = false;\n"
             "pub const only_c = false;\n"
             "pub const only_core_functionality = true;\n"
         , zig_version);
         if (written < 100)
             panic("unable to write to config.zig file");
         if (fclose(f) != 0)
             panic("unable to finish writing to config.zig file");
     }
 
     {
         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",
             "--mod", "root", "src/main.zig",
             "--mod", "build_options", "config.zig",
             "--mod", "aro", "lib/compiler/aro/aro.zig",
             NULL,
         };
         print_and_run(child_argv);
     }
 
     {
         const char *child_argv[] = {
             "./zig1", "lib", "build-obj",
             "-ofmt=c", "-OReleaseSmall",
             "--name", "compiler_rt", "-femit-bin=compiler_rt.c",
             "-target", host_triple,
             "--dep", "build_options",
             "--mod", "root", "lib/compiler_rt.zig",
             "--mod", "build_options", "config.zig",
             NULL,
         };
         print_and_run(child_argv);
     }
 
     {
         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",
 #else
             "-Wl,-z,stack-size=0x10000000",
 #endif
 #if defined(__GNUC__)
             "-pthread",
 #endif
             NULL,
         };
         print_and_run(child_argv);
     }
 }