Make: Stack-realign for i386 builds

Relates to #280

Author: ashvardanian

build.rs

@@ -13,10 +13,16 @@ fn main() -> Result<(), cc::Error> {
         .flag_if_supported("-pedantic") // Strict compliance when supported
         .warnings(false);
 
+    // On 32-bit x86, ensure proper stack alignment for floating-point operations
+    // See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38534
+    let target_arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();
+    if target_arch == "x86" {
+        build.flag_if_supported("-mstackrealign");
+        build.flag_if_supported("-mpreferred-stack-boundary=4");
+    }
+
     if let Err(e) = build.try_compile("simsimd") {
         print!("cargo:warning=Failed to compile with all SIMD backends...");
-
-        let target_arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();
         let flags_to_try = match target_arch.as_str() {
             "arm" | "aarch64" => vec![
                 "SIMSIMD_TARGET_SVE2",