fix(preview): relax Linux private DSO linking

Author: 66HEX

scripts/setup-gstreamer.cjs

@@ -516,6 +516,7 @@ function printShellEnv(manifest) {
 	}
 	if (manifest.platform === 'linux') {
 		console.log(`export LD_LIBRARY_PATH="${manifest.libDir}${delimiter}$LD_LIBRARY_PATH"`);
+		console.log(`export RUSTFLAGS="${mergeFlags('$RUSTFLAGS', linuxLinkFlags(manifest))}"`);
 	}
 	if (manifest.platform === 'macos') {
 		console.log(`export RUSTFLAGS="${mergeFlags('$RUSTFLAGS', macosRpathFlag(manifest))}"`);
@@ -544,6 +545,7 @@ function writeGitHubEnv(manifest) {
 		entries.push(
 			`LD_LIBRARY_PATH=${manifest.libDir}${delimiter}${process.env.LD_LIBRARY_PATH ?? ''}`
 		);
+		entries.push(`RUSTFLAGS=${mergeFlags(process.env.RUSTFLAGS, linuxLinkFlags(manifest))}`);
 	}
 	if (manifest.platform === 'macos') {
 		entries.push(`RUSTFLAGS=${mergeFlags(process.env.RUSTFLAGS, macosRpathFlag(manifest))}`);
@@ -561,6 +563,13 @@ function macosRpathFlag(manifest) {
 	return `-C link-arg=-Wl,-rpath,${manifest.libDir}`;
 }
 
+function linuxLinkFlags(manifest) {
+	return [
+		`-C link-arg=-Wl,-rpath,${manifest.libDir}`,
+		'-C link-arg=-Wl,--allow-shlib-undefined'
+	].join(' ');
+}
+
 function mergeFlags(current, next) {
 	return [current, next].filter(Boolean).join(' ');
 }