Remove numerous things deprecated during the 0.14 release cycle

Basically everything that has a direct replacement or no uses left.

Notable omissions:

- std.ArrayHashMap: Too much fallout, needs a separate cleanup.
- std.debug.runtime_safety: Too much fallout.
- std.heap.GeneralPurposeAllocator: Lots of references to it remain, not
  a simple find and replace as "debug allocator" is not equivalent to
  "general purpose allocator".
- std.io.Reader: Is being reworked at the moment.
- std.unicode.utf8Decode(): No replacement, needs a new API first.
- Manifest backwards compat options: Removal would break test data used
  by TestFetchBuilder.
- panic handler needs to be a namespace: Many tests still rely on it
  being a function, needs a separate cleanup.

Author: linusg

doc/langref/build_c.zig

@@ -1,7 +1,8 @@
 const std = @import("std");
 
 pub fn build(b: *std.Build) void {
-    const lib = b.addSharedLibrary(.{
+    const lib = b.addLibrary(.{
+        .linkage = .dynamic,
         .name = "mathtest",
         .root_source_file = b.path("mathtest.zig"),
         .version = .{ .major = 1, .minor = 0, .patch = 0 },

doc/langref/test_noreturn_from_exit.zig

@@ -3,7 +3,7 @@ const builtin = @import("builtin");
 const native_arch = builtin.cpu.arch;
 const expect = std.testing.expect;
 
-const WINAPI: std.builtin.CallingConvention = if (native_arch == .x86) .Stdcall else .C;
+const WINAPI: std.builtin.CallingConvention = if (native_arch == .x86) .{ .x86_stdcall = .{} } else .c;
 extern "kernel32" fn ExitProcess(exit_code: c_uint) callconv(WINAPI) noreturn;
 
 test "foo" {

lib/compiler/aro/aro/Parser.zig

@@ -8259,7 +8259,7 @@ fn charLiteral(p: *Parser) Error!Result {
     const slice = char_kind.contentSlice(p.tokSlice(p.tok_i));
 
     var is_multichar = false;
-    if (slice.len == 1 and std.ascii.isASCII(slice[0])) {
+    if (slice.len == 1 and std.ascii.isAscii(slice[0])) {
         // fast path: single unescaped ASCII char
         val = slice[0];
     } else {

lib/compiler/aro_translate_c.zig

@@ -1820,7 +1820,7 @@ pub fn main() !void {
     var tree = translate(gpa, &aro_comp, args) catch |err| switch (err) {
         error.ParsingFailed, error.FatalError => renderErrorsAndExit(&aro_comp),
         error.OutOfMemory => return error.OutOfMemory,
-        error.StreamTooLong => std.zig.fatal("An input file was larger than 4GiB", .{}),
+        error.StreamTooLong => std.process.fatal("An input file was larger than 4GiB", .{}),
     };
     defer tree.deinit(gpa);
 

lib/compiler/objcopy.zig

@@ -7,7 +7,7 @@ const Allocator = std.mem.Allocator;
 const File = std.fs.File;
 const assert = std.debug.assert;
 
-const fatal = std.zig.fatal;
+const fatal = std.process.fatal;
 const Server = std.zig.Server;
 
 pub fn main() !void {