tf-psa-crypto: Add cmake_package test program

We cannot add the equivalent of
cmake_package_install yet as the build in
tf-psa-crypto still references some headers
in ./include/mbedtls like mbedtls_config.h.

We cannot add the equivalent of
cmake_subproject yet as currently only
the case of the Mbed TLS parent project is
supported.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>

tests/scripts/components-build-system.sh

@@ -143,6 +143,27 @@ component_test_cmake_as_package () {
     fi
 }
 
+component_test_tf_psa_crypto_cmake_as_package () {
+    # Remove existing generated files so that we use the ones CMake
+    # generates
+    make neat
+
+    msg "build: cmake 'as-package' build"
+    root_dir="$(pwd)"
+    cd tf-psa-crypto/programs/test/cmake_package
+    build_variant_dir="$(pwd)"
+    cmake .
+    make
+    ./cmake_package
+    if [[ "$OSTYPE" == linux* ]]; then
+        PKG_CONFIG_PATH="${build_variant_dir}/tf-psa-crypto/pkgconfig" \
+        ${root_dir}/tests/scripts/pkgconfig.sh \
+        tfpsacrypto
+        # This is the EXPECTED package name. Renaming it could break consumers
+        # of pkg-config, consider carefully.
+    fi
+}
+
 support_test_cmake_as_package () {
     support_test_cmake_out_of_source
 }

tf-psa-crypto/programs/test/cmake_package/.gitignore

@@ -0,0 +1,3 @@
+Makefile
+cmake_package
+tf-psa-crypto

tf-psa-crypto/programs/test/cmake_package/CMakeLists.txt

@@ -0,0 +1,35 @@
+cmake_minimum_required(VERSION 2.8.12)
+
+#
+# Simulate configuring and building TF-PSA-Crypto as the user might do it.
+# We'll skip installing it, and use the build directory directly instead.
+#
+
+set(TF-PSA-Crypto_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../..")
+set(TF-PSA-Crypto_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/tf-psa-crypto")
+
+execute_process(
+    COMMAND "${CMAKE_COMMAND}"
+        "-H${TF-PSA-Crypto_SOURCE_DIR}"
+        "-B${TF-PSA-Crypto_BINARY_DIR}"
+        "-DENABLE_PROGRAMS=NO"
+        "-DENABLE_TESTING=NO")
+
+execute_process(
+    COMMAND "${CMAKE_COMMAND}"
+        --build "${TF-PSA-Crypto_BINARY_DIR}")
+
+#
+# Locate the package.
+#
+
+set(TF-PSA-Crypto_DIR "${TF-PSA-Crypto_BINARY_DIR}/cmake")
+find_package(TF-PSA-Crypto REQUIRED)
+
+#
+# At this point, the TF-PSA-Crypto targets should have been imported, and we
+# can now link to them from our own program.
+#
+
+add_executable(cmake_package cmake_package.c)
+target_link_libraries(cmake_package TF-PSA-Crypto::mbedcrypto)

tf-psa-crypto/programs/test/cmake_package/cmake_package.c

@@ -0,0 +1,19 @@
+/*
+ *  Simple program to test that TF-PSA-Crypto builds correctly as a CMake
+ *  package.
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include <psa/crypto.h>
+
+/* The main reason to build this is for testing the CMake build, so the program
+ * doesn't need to do very much. It calls a PSA cryptography API to ensure
+ * linkage works, but that is all. */
+int main()
+{
+    psa_crypto_init();
+
+    return 0;
+}