EnvMap provides the same API as the previously used BufMap (besides `putMove` and `getPtr`), so usage sites of `getEnvMap` can usually remain unchanged.
For non-Windows, EnvMap is a wrapper around BufMap. On Windows, it uses a new EnvMapWindows to handle some Windows-specific behavior:
- Lookups use Unicode-aware case insensitivity (but `get` cannot return an error because EnvMapWindows has an internal buffer to use for lookup conversions)
- Canonical names are returned when iterating the EnvMap
Fixes#10561, closes#4603
When handling the `negate` ZIR instruction, Zig now checks for a
comptime operand and handles it as a special case rather than lowering
it as `0 - x` so that the expression `-x` where `x` is a floating point
value known at compile-time, will get the negative zero bitwise
representation.
* back out the changes to RunStep
* move the disabled test to the .cpp code and avoid a confusing
name-collision with the _LIBCPP macro prefix
* fix merge conflict with the edits to the same test that ensure global
initializers are called.
Now this branch is only concerned with single-threaded targets and
passing the correct macro defines to libc++.
```
$ valgrind ./zig test ../test/behavior.zig -target powerpc-linux-musl -lc -I../test
==2828778== Invalid read of size 1
==2828778== at 0x6EA0265: LLVMSetVisibility (in /home/andy/Downloads/zig/build/zig)
==2828778== by 0x1BCE60B: do_code_gen(CodeGen*) (codegen.cpp:9031)
==2828778== by 0x1BD51E2: codegen_build_object(CodeGen*) (codegen.cpp:10610)
==2828778== by 0x1BA5C17: zig_stage1_build_object (stage1.cpp:132)
==2828778== by 0xE61E24: Module.build_object (stage1.zig:149)
==2828778== by 0xC3D4CE: Compilation.updateStage1Module (Compilation.zig:5025)
==2828778== by 0xC3117E: Compilation.performAllTheWork (Compilation.zig:2691)
==2828778== by 0xC2A3ED: Compilation.update (Compilation.zig:2098)
==2828778== by 0xBB9D1F: main.updateModule (main.zig:3104)
==2828778== by 0xB16B75: main.buildOutputType (main.zig:2793)
==2828778== by 0xAD0526: main.mainArgs (main.zig:225)
==2828778== by 0xACFCB9: main (stage1.zig:48)
```
Since the plan is to ship stage3 for Zig 0.10.0, the stage1
implementation of this hardly matters.
* Rename std.builtin.GlobalVisibility to std.builtin.SymbolVisibility
* Add missing compile error. From the LLVM language reference: "A
symbol with internal or private linkage must have default
visibility."
