Add some cross-compilation tests

.cargo/config.toml

@@ -0,0 +1,7 @@
+# Cargo seems to expect the -gcc variant instead of -ld
+
+[target.armv7-unknown-linux-gnueabihf]
+linker = "arm-linux-gnueabihf-gcc"
+
+[target.aarch64-unknown-linux-gnu]
+linker = "aarch64-linux-gnu-gcc"

ci.sh

@@ -218,6 +218,13 @@ fi
 echo "Build test"
 RUST_BACKTRACE=1 cargo build $FEATURES
 
+echo "Cross-compilation test"
+# Make sure the the provider install the correct targets via rustup in its Dockerfile.
+if [ "$PROVIDER_NAME" = "pkcs11" ] || [ "$PROVIDER_NAME" = "mbed-crypto" ]; then
+	RUST_BACKTRACE=1 cargo build $FEATURES --target armv7-unknown-linux-gnueabihf
+	RUST_BACKTRACE=1 cargo build $FEATURES --target aarch64-unknown-linux-gnu
+fi
+
 echo "Static checks"
 # On native target clippy or fmt might not be available.
 if rustup component list | grep -q fmt; then

e2e_tests/provider_cfg/mbed-crypto/Dockerfile

@@ -7,8 +7,16 @@ RUN apt-get update && \
 	# Needed for Open SSL
 	apt-get install -y pkg-config libssl-dev
 
+RUN apt -y install gcc-multilib
+RUN apt -y install gcc-arm-linux-gnueabihf
+RUN apt -y install gcc-aarch64-linux-gnu
+
 WORKDIR /tmp
 
 # Install Rust toolchain
 RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
+
+# Adding the targets for the cross-compilation test
+RUN rustup target add armv7-unknown-linux-gnueabihf
+RUN rustup target add aarch64-unknown-linux-gnu

e2e_tests/provider_cfg/pkcs11/Dockerfile

@@ -9,6 +9,10 @@ RUN apt-get update && \
 	# Needed for Open SSL
 	apt-get install -y pkg-config libssl-dev
 
+RUN apt -y install gcc-multilib
+RUN apt -y install gcc-arm-linux-gnueabihf
+RUN apt -y install gcc-aarch64-linux-gnu
+
 WORKDIR /tmp
 RUN git clone https://github.com/opendnssec/SoftHSMv2.git \
 	&& cd SoftHSMv2 \
@@ -28,6 +32,10 @@ RUN cd SoftHSMv2 \
 RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
 
+# Adding the targets for the cross-compilation test
+RUN rustup target add armv7-unknown-linux-gnueabihf
+RUN rustup target add aarch64-unknown-linux-gnu
+
 # Create a new token in a new slot. The slot number assigned will be random
 # and is found with the find_slot_number script.
 RUN softhsm2-util --init-token --slot 0 --label "Parsec Tests" --pin 123456 --so-pin 123456