zed: set RUSTFLAGS via env variable

turns out `-fuse-ld=lld` required for non-clang environments is not applied correctly. use RUSTFLAGS instead of patch

mingw-w64-zed/PKGBUILD

@@ -4,7 +4,7 @@ _realname=zed
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=0.172.10
-pkgrel=1
+pkgrel=2
 pkgdesc="A high-performance, multiplayer code editor (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64')
@@ -40,12 +40,10 @@ fi
 source=("git+${msys2_repository_url}.git#tag=v${pkgver}"
         "zstd-sys.tar.gz::https://crates.io/api/v1/crates/zstd-sys/2.0.13+zstd.1.5.6/download"
         "zed-dont-vendor-cargo-about.patch"
-        "zed-set-rustflags.patch"
         "zstd-sys-remove-statik.patch")
 sha256sums=('7241cd752275dffad8975fb4fad7c50d7407dbaad4bcae8e3bad13cda9d371bc'
             '38ff0f21cfee8f97d94cef41359e0c89aa6113028ab0291aa8ca0038995a95aa'
             'b126b7a9e3cc8d3d68c49dbfc184d54691b10172dbfd3272d4c2f43424cfca5b'
-            '86bad9a2bb0356bdd820a6ac73ec3f736f784b4d487af9a8f6bdc0c3e5b309d1'
             '48f4900ceb02d3aaf9a1020f33d56629156e96759f456c0e7ca18bfcf910767b')
 
 prepare() {
@@ -55,10 +53,6 @@ prepare() {
 
   # use system cargo about to generate license file
   patch -Np1 -i "../zed-dont-vendor-cargo-about.patch"
-  # apply `-Cforce-frame-pointers=yes` in .cargo/config.toml instead of env var to apply other
-  # compilation flags; remove +crt-static which is added for webrtc; use lld linker to fix keyboard
-  # shortcuts https://github.com/msys2/MINGW-packages/issues/22071
-  patch -Np1 -i "../zed-set-rustflags.patch"
   # link system deps dynamically
   patch -d "../zstd-sys-2.0.13+zstd.1.5.6" -i "../zstd-sys-remove-statik.patch"
   # use patched *-sys crates
@@ -93,8 +87,10 @@ build() {
   export ZED_UPDATE_EXPLANATION='Updates are handled by pacman'
   export CARGO_PROFILE_RELEASE_DEBUG=0
   export RELEASE_VERSION="${pkgver} (Rev${pkgrel}, Built by MSYS2 project)"
-  # apply RUSTFLAGS from .cargo/config.toml instead of env var
-  unset RUSTFLAGS
+  # should be synced with .cargo/config.toml. use lld linker to fix keyboard shortcuts
+  # https://github.com/msys2/MINGW-packages/issues/22071
+  export RUSTFLAGS="$RUSTFLAGS -C link-arg=-fuse-ld=lld -C symbol-mangling-version=v0
+    --cfg tokio_unstable --cfg windows_slim_errors"
 
   cargo build --release --frozen -p zed
 }

mingw-w64-zed/zed-set-rustflags.patch

@@ -1,19 +0,0 @@
-diff --git a/.cargo/config.toml b/.cargo/config.toml
-index 07cbc23195..fcc5fd7b3d 100644
---- a/.cargo/config.toml
-+++ b/.cargo/config.toml
-@@ -1,6 +1,6 @@
- [build]
- # v0 mangling scheme provides more detailed backtraces around closures
--rustflags = ["-C", "symbol-mangling-version=v0", "--cfg", "tokio_unstable"]
-+rustflags = ["-C", "symbol-mangling-version=v0", "--cfg", "tokio_unstable", "-Cforce-frame-pointers=yes", "-Clink-arg=-fuse-ld=lld"]
- 
- [alias]
- xtask = "run --package xtask --"
-@@ -23,6 +23,4 @@ rustflags = ["-C", "link-args=-Objc -all_load"]
- rustflags = [
-     "--cfg",
-     "windows_slim_errors",        # This cfg will reduce the size of `windows::core::Error` from 16 bytes to 4 bytes
--    "-C",
--    "target-feature=+crt-static", # This fixes the linking issue when compiling livekit on Windows
- ]