Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -29,13 +29,19 @@ build:armhflinux:
     paths:
       - target/
   before_script:
-    - dpkg --add-architecture armhf && apt-get update && apt-get install -y openssl:armhf libssl-dev:armhf
+    - dpkg --add-architecture armhf && apt-get update && apt-get install -y openssl:armhf libssl-dev:armhf pkg-config:armhf
     - rustup target add arm-unknown-linux-gnueabihf
     - git clone --depth=1 https://github.com/raspberrypi/tools raspberrypi-tools
     - mkdir .cargo && touch .cargo/config.toml
     - echo "[target.arm-unknown-linux-gnueabihf]" >> .cargo/config.toml
     - echo "linker = \"$(pwd)/raspberrypi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-gcc\"" >> .cargo/config.toml
   script:
+    - export SYSROOT=/usr/arm-linux-gnueabihf
+    - export PKG_CONFIG_ALLOW_CROSS=1
+    - export PKG_CONFIG_LIBDIR=/usr/lib/arm-linux-gnueabihf/pkgconfig
+    - export PKG_CONFIG_SYSROOT_DIR=${SYSROOT}
+    - export PKG_CONFIG_SYSTEM_LIBRARY_PATH=/usr/lib/arm-linux-gnueabihf
+    - export PKG_CONFIG_SYSTEM_INCLUDE_PATH=/usr/arm-linux-gnueabihf/include
     - cargo build --release --target=arm-unknown-linux-gnueabihf
   artifacts:
     paths: