Adding camke search for MbedTLS

CMakeLists.txt

@@ -369,7 +369,7 @@ if(BUILD_TESTING AND picoquic_BUILD_TESTS)
     set_picoquic_compile_settings(picoquic-test)
 
     add_executable(picoquic_ct picoquic_t/picoquic_t.c)
-    target_link_libraries(picoquic_ct PRIVATE picoquic-test)
+    target_link_libraries(picoquic_ct PRIVATE picoquic-test ${MBEDTLS_LIBRARIES})
     set_picoquic_compile_settings(picoquic_ct)
 
     add_executable(picohttp_ct

cmake/FindMbedTLS.cmake

@@ -0,0 +1,20 @@
+# - Try to find MbedTLS
+# set(MBEDTLS_LIBRARY mbedtls)
+# set(MBEDTLS_INCLUDE_DIRS ${MBEDTLS_SOURCE_DIR}/include)
+find_path(MBEDTLS_INCLUDE_DIRS
+    NAMES mbedtls/build_info.h psa/crypto.h
+    HINTS ${MBEDTLS_PREFIX}/include/
+        ${CMAKE_SOURCE_DIR}/../mbedtls/include/
+        ${CMAKE_BINARY_DIR}/../mbedtls/include/
+        ../mbedtls/include/ )
+
+set(MBEDTLS_HINTS ${MBEDTLS_PREFIX}/build/library 
+    ${CMAKE_BINARY_DIR}/../mbedtls/build/library
+    ../mbedtls/build/library ../mbedtls/library)
+
+find_library(MBEDTLS_LIBRARY mbedtls HINTS ${MBEDTLS_HINTS})
+find_library(MBEDTLS_CRYPTO mbedcrypto HINTS ${MBEDTLS_HINTS})
+find_library(MBEDTLS_X509 mbedx509 HINTS ${MBEDTLS_HINTS})
+set(MBEDTLS_LIBRARIES ${MBEDTLS_LIBRARY} ${MBEDTLS_CRYPTO} ${MBEDTLS_X509})
+
+mark_as_advanced(MBEDTLS_LIBRARY MBEDTLS_INCLUDE_DIRS)