jemalloc is not building on windows

[jasonwilliams]

This is my fault i should have tested this on my windows machine, but ive noticed since the jemalloc is merged cargo buld fails for me on windows.

cargo build
   Compiling fs_extra v1.1.0
   Compiling cc v1.0.50
   Compiling unicode-width v0.1.7
   Compiling ppv-lite86 v0.2.6
   Compiling strsim v0.8.0
   Compiling itoa v0.4.5
   Compiling regex-syntax v0.6.17
   Compiling vec_map v0.8.1
   Compiling gc v0.3.3
   Compiling thread_local v1.0.1
   Compiling getrandom v0.1.14
   Compiling memchr v2.3.3    
   Compiling winapi v0.3.8    
   Compiling libc v0.2.68     
   Compiling bitflags v1.2.1
   Compiling ryu v1.0.3
   Compiling textwrap v0.11.0
   Compiling rand_core v0.5.1
   Compiling serde v1.0.105
   Compiling wasm-bindgen v0.2.60
   Compiling aho-corasick v0.7.10
   Compiling rand_chacha v0.2.2
   Compiling rand v0.7.3
   Compiling jemalloc-sys v0.3.2
error: failed to run custom build command for `jemalloc-sys v0.3.2`

Caused by:
  process didn't exit successfully: `C:\Users\jasew\workspace\boa\target\debug\build\jemalloc-sys-ca10a7d760cdd634\build-script-build` (exit code: 101)
--- stdout
TARGET=x86_64-pc-windows-msvc
HOST=x86_64-pc-windows-msvc
NUM_JOBS=16
OUT_DIR="C:\\Users\\jasew\\workspace\\boa\\target\\debug\\build\\jemalloc-sys-cb31257d9274fda5\\out"
BUILD_DIR="C:\\Users\\jasew\\workspace\\boa\\target\\debug\\build\\jemalloc-sys-cb31257d9274fda5\\out\\build"
SRC_DIR="C:\\Users\\jasew\\.cargo\\registry\\src\\git.luolix.top-1ecc6299db9ec823\\jemalloc-sys-0.3.2"
cargo:warning="jemalloc support for `x86_64-pc-windows-msvc` is untested"
OPT_LEVEL = Some("0")
TARGET = Some("x86_64-pc-windows-msvc")
HOST = Some("x86_64-pc-windows-msvc")
CC_x86_64-pc-windows-msvc = None
CC_x86_64_pc_windows_msvc = None
HOST_CC = None
CC = None
CFLAGS_x86_64-pc-windows-msvc = None
CFLAGS_x86_64_pc_windows_msvc = None
HOST_CFLAGS = None
CFLAGS = None
CRATE_CC_NO_DEFAULTS = None
CARGO_CFG_TARGET_FEATURE = Some("fxsr,mmx,sse,sse2")
DEBUG = Some("true")
CC="C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.15.26726\\bin\\HostX64\\x64\\cl.exe"
CFLAGS="-nologo -MD -Z7 -Brepro -W4"
JEMALLOC_REPO_DIR="jemalloc"
JEMALLOC_SRC_DIR="C:\\Users\\jasew\\workspace\\boa\\target\\debug\\build\\jemalloc-sys-cb31257d9274fda5\\out\\jemalloc"
cargo:rustc-cfg=prefixed
--with-jemalloc-prefix=_rjem_
running: "sh" "/c/Users/jasew/workspace/boa/target/debug/build/jemalloc-sys-cb31257d9274fda5/out/jemalloc/configure" "--disable-cxx" "--with-jemalloc-prefix=_rjem_" "--with-private-namespace=_rjem_" "--host=x86_64-pc-win32" "--build=x86_64-pc-win32" "--prefix=C:\\Users\\jasew\\workspace\\boa\\target\\debug\\build\\jemalloc-sys-cb31257d9274fda5\\out"

--- stderr
thread 'main' panicked at 'failed to execute command: The system cannot find the file specified. (os error 2)', C:\Users\jasew\.cargo\registry\src\git.luolix.top-1ecc6299db9ec823\jemalloc-sys-0.3.2\build.rs:389:19
stack backtrace:
   0: std::sys_common::backtrace::_print::{{impl}}::fmt
             at /rustc/f509b26a7730d721ef87423a72b3fdf8724b4afa\/src\libstd\sys_common\backtrace.rs:59
   1: core::fmt::write
             at /rustc/f509b26a7730d721ef87423a72b3fdf8724b4afa\/src\libcore\fmt\mod.rs:1069
   2: std::io::Write::write_fmt<std::sys::windows::stdio::Stderr>
             at /rustc/f509b26a7730d721ef87423a72b3fdf8724b4afa\/src\libstd\io\mod.rs:1427
   3: std::panicking::default_hook::{{closure}}
             at /rustc/f509b26a7730d721ef87423a72b3fdf8724b4afa\/src\libstd\panicking.rs:198
   4: std::panicking::default_hook
             at /rustc/f509b26a7730d721ef87423a72b3fdf8724b4afa\/src\libstd\panicking.rs:218

cargo:warning="jemalloc support for `x86_64-pc-windows-msvc` is untested"

This could be a problem

ping @Razican what OS you using?

[jasonwilliams]

I may have to revert the commit until we know what it is because im a bit blocked at the moment, looks like it may have issue with Windows rust-lang/rust-analyzer#696

[Razican]

What we can do is to not use jemalloc on Windows, and use it only on Linux / MacOS. On Linux seems to be working fine.