self-hosted libc detection

 * libc_installation.cpp is deleted.
   src-self-hosted/libc_installation.zig is now used for both stage1 and
   stage2 compilers.
 * (breaking) move `std.fs.File.access` to `std.fs.Dir.access`. The API
   now encourages use with an open directory handle.
 * Add `std.os.faccessat` and related functions.
 * Deprecate the "C" suffix naming convention for null-terminated
   parameters. "C" should be used when it is related to libc. However
   null-terminated parameters often have to do with the native system
   ABI rather than libc. "Z" suffix is the new convention. For example,
   `std.os.openC` is deprecated in favor of `std.os.openZ`.
 * Add `std.mem.dupeZ` for using an allocator to copy memory and add a
   null terminator.
 * Remove dead struct field `std.ChildProcess.llnode`.
 * Introduce `std.event.Batch`. This API allows expressing concurrency
   without forcing code to be async. It requires no Allocator and does
   not introduce any failure conditions. However it is not thread-safe.
 * There is now an ongoing experiment to transition away from
   `std.event.Group` in favor of `std.event.Batch`.
 * `std.os.execvpeC` calls `getenvZ` rather than `getenv`. This is
   slightly more efficient on most systems, and works around a
   limitation of `getenv` lack of integration with libc.
 * (breaking) `std.os.AccessError` gains `FileBusy`, `SymLinkLoop`, and
   `ReadOnlyFileSystem`. Previously these error codes were all reported
   as `PermissionDenied`.
 * Add `std.Target.isDragonFlyBSD`.
 * stage2: access to the windows_sdk functions is done with a manually
   maintained .zig binding file instead of `@cImport`.
 * Update src-self-hosted/libc_installation.zig with all the
   improvements that stage1 has seen to src/libc_installation.cpp until
   now. In addition, it now takes advantage of Batch so that evented I/O
   mode takes advantage of concurrency, but it still works in blocking
   I/O mode, which is how it is used in stage1.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/error.cpp b/src/error.cpp
index 871b6b9e35..1e0267eb67 100644
--- a/src/error.cpp
+++ b/src/error.cpp
@@ -65,6 +65,20 @@ const char *err_str(Error err) {
         case ErrorInvalidLlvmCpuFeaturesFormat: return "invalid LLVM CPU features format";
         case ErrorUnknownApplicationBinaryInterface: return "unknown application binary interface";
         case ErrorASTUnitFailure: return "compiler bug: clang encountered a compile error, but the libclang API does not expose the error. See https://github.com/ziglang/zig/issues/4455 for more details";
+        case ErrorBadPathName: return "bad path name";
+        case ErrorSymLinkLoop: return "sym link loop";
+        case ErrorProcessFdQuotaExceeded: return "process fd quota exceeded";
+        case ErrorSystemFdQuotaExceeded: return "system fd quota exceeded";
+        case ErrorNoDevice: return "no device";
+        case ErrorDeviceBusy: return "device busy";
+        case ErrorUnableToSpawnCCompiler: return "unable to spawn system C compiler";
+        case ErrorCCompilerExitCode: return "system C compiler exited with failure code";
+        case ErrorCCompilerCrashed: return "system C compiler crashed";
+        case ErrorCCompilerCannotFindHeaders: return "system C compiler cannot find libc headers";
+        case ErrorLibCRuntimeNotFound: return "libc runtime not found";
+        case ErrorLibCStdLibHeaderNotFound: return "libc std lib headers not found";
+        case ErrorLibCKernel32LibNotFound: return "kernel32 library not found";
+        case ErrorUnsupportedArchitecture: return "unsupported architecture";
     }
     return "(invalid error)";
 }