fix zlib

Author: nikhilsinhaparseable

.github/workflows/build.yaml

@@ -205,8 +205,13 @@ jobs:
           PKG_CONFIG_ALLOW_CROSS: "1"
           CROSS_NO_WARNINGS: "0"
           RUST_BACKTRACE: "1"
+
+          # Zlib hints for CMake
+          ZLIB_ROOT: "/usr"
           ZLIB_INCLUDE_DIR: "/usr/include/aarch64-linux-gnu"
           ZLIB_LIBRARY: "/usr/lib/aarch64-linux-gnu/libz.so"
+
+          # OpenSSL hints
           OPENSSL_ROOT_DIR: "/usr"
           OPENSSL_INCLUDE_DIR: "/usr/include/aarch64-linux-gnu"
           OPENSSL_CRYPTO_LIBRARY: "/usr/lib/aarch64-linux-gnu/libcrypto.so"

Cross.toml

@@ -4,6 +4,9 @@ pre-build = [
     "dpkg --add-architecture arm64",
     "apt-get update || true",
     "apt-get install -y pkg-config:arm64 zlib1g-dev:arm64 libssl-dev:arm64 libsasl2-dev:arm64 libzstd-dev:arm64 liblz4-dev:arm64 || true",
+    # debug: confirm zlib and headers exist
+    "ls -R /usr/lib/aarch64-linux-gnu || true",
+    "ls -R /usr/include/aarch64-linux-gnu || true",
 ]
 
 [target.aarch64-unknown-linux-gnu.env]
@@ -12,8 +15,11 @@ passthrough = [
     "PKG_CONFIG_ALLOW_CROSS",
     "CROSS_NO_WARNINGS",
     "RUST_BACKTRACE",
+    # Zlib hints for CMake
+    "ZLIB_ROOT",
     "ZLIB_INCLUDE_DIR",
     "ZLIB_LIBRARY",
+    # OpenSSL hints
     "OPENSSL_ROOT_DIR",
     "OPENSSL_INCLUDE_DIR",
     "OPENSSL_CRYPTO_LIBRARY",