Apply PIC flags to all x64 native builds.

.gitea/workflows/release.yml

@@ -137,9 +137,9 @@ jobs:
     env:
       AR_x86_64_unknown_linux_gnu: x86_64-linux-gnu-ar
       CC_x86_64_unknown_linux_gnu: x86_64-linux-gnu-gcc
-      CFLAGS_x86_64_unknown_linux_gnu: -fPIC
+      CFLAGS: -fPIC
       CXX_x86_64_unknown_linux_gnu: x86_64-linux-gnu-g++
-      CXXFLAGS_x86_64_unknown_linux_gnu: -fPIC
+      CXXFLAGS: -fPIC
       CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER: x86_64-linux-gnu-gcc
       CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS: -C link-arg=--sysroot=/opt/ruds-x64-sysroot -C link-arg=-Wl,-rpath,$ORIGIN -L native=/opt/ruds-x64-sysroot/usr/lib/x86_64-linux-gnu -L native=/opt/ruds-x64-sysroot/lib/x86_64-linux-gnu
       PKG_CONFIG_ALLOW_CROSS: "1"

crates/bds-ui/tests/packaging_assets.rs

@@ -148,8 +148,8 @@ fn tagged_releases_are_built_and_packaged_with_rust_tools() {
         "publish",
         "PKG_CONFIG_ALLOW_CROSS",
         "CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER",
-        "CFLAGS_x86_64_unknown_linux_gnu: -fPIC",
-        "CXXFLAGS_x86_64_unknown_linux_gnu: -fPIC",
+        "CFLAGS: -fPIC",
+        "CXXFLAGS: -fPIC",
     ] {
         assert!(
             workflow.contains(required),