Build: Add MBEDTLS_TARGET_PREFIX

Allows required targets to have prefixes added to them, so that external
projects can avoid target names clashing.

Signed-off-by: Raef Coles <raef.coles@arm.com>

CMakeLists.txt

@@ -14,6 +14,10 @@
 #     CMake files. It is related to ZLIB support which is planned to be removed.
 #     When the support is removed, the associated include_directories command
 #     will be removed as well as this note.
+# - MBEDTLS_TARGET_PREFIX: CMake targets are designed to be alterable by calling
+#   CMake in order to avoid target name clashes, via the use of
+#   MBEDTLS_TARGET_PREFIX. The value of this variable is prefixed to the
+#   mbedtls, mbedx509, mbedcrypto and apidoc targets.
 #
 
 cmake_minimum_required(VERSION 2.6)
@@ -273,7 +277,7 @@ if(ENABLE_PROGRAMS)
     add_subdirectory(programs)
 endif()
 
-ADD_CUSTOM_TARGET(apidoc
+ADD_CUSTOM_TARGET(${MBEDTLS_TARGET_PREFIX}apidoc
     COMMAND doxygen mbedtls.doxyfile
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/doxygen)
 

ChangeLog.d/add_MBEDTLS_TARGET_PREFIX_to_cmake.txt

@@ -0,0 +1,6 @@
+Features
+   * Add MBEDTLS_TARGET_PREFIX CMake variable, which is prefixed to the mbedtls,
+     mbedcrypto, mbedx509 and apidoc CMake target names. This can be used by
+     external CMake projects that include this one to avoid CMake target name
+     clashes.  The default value of this variable is "", so default target names
+     are unchanged.

library/CMakeLists.txt

@@ -150,18 +150,31 @@ if (NOT USE_STATIC_MBEDTLS_LIBRARY AND NOT USE_SHARED_MBEDTLS_LIBRARY)
     message(FATAL_ERROR "Need to choose static or shared mbedtls build!")
 endif(NOT USE_STATIC_MBEDTLS_LIBRARY AND NOT USE_SHARED_MBEDTLS_LIBRARY)
 
-set(target_libraries "mbedcrypto" "mbedx509" "mbedtls")
+set(mbedtls_target    "${MBEDTLS_TARGET_PREFIX}mbedtls")
+set(mbedx509_target   "${MBEDTLS_TARGET_PREFIX}mbedx509")
+set(mbedcrypto_target "${MBEDTLS_TARGET_PREFIX}mbedcrypto")
+
+set(mbedtls_target    ${mbedtls_target}    PARENT_SCOPE)
+set(mbedx509_target   ${mbedx509_target}   PARENT_SCOPE)
+set(mbedcrypto_target ${mbedcrypto_target} PARENT_SCOPE)
+
+if (USE_STATIC_MBEDTLS_LIBRARY)
+    set(mbedtls_static_target    ${mbedtls_target})
+    set(mbedx509_static_target   ${mbedx509_target})
+    set(mbedcrypto_static_target ${mbedcrypto_target})
+endif()
+
+set(target_libraries ${mbedcrypto_target} ${mbedx509_target} ${mbedtls_target})
 
 if(USE_STATIC_MBEDTLS_LIBRARY AND USE_SHARED_MBEDTLS_LIBRARY)
-    set(mbedtls_static_target "mbedtls_static")
-    set(mbedx509_static_target "mbedx509_static")
-    set(mbedcrypto_static_target "mbedcrypto_static")
+    string(APPEND mbedtls_static_target    "_static")
+    string(APPEND mbedx509_static_target   "_static")
+    string(APPEND mbedcrypto_static_target "_static")
+
     list(APPEND target_libraries
-        "mbedcrypto_static" "mbedx509_static" "mbedtls_static")
-elseif(USE_STATIC_MBEDTLS_LIBRARY)
-    set(mbedtls_static_target "mbedtls")
-    set(mbedx509_static_target "mbedx509")
-    set(mbedcrypto_static_target "mbedcrypto")
+        ${mbedcrypto_static_target}
+        ${mbedx509_static_target}
+        ${mbedtls_static_target})
 endif()
 
 if(USE_STATIC_MBEDTLS_LIBRARY)
@@ -179,17 +192,17 @@ if(USE_STATIC_MBEDTLS_LIBRARY)
 endif(USE_STATIC_MBEDTLS_LIBRARY)
 
 if(USE_SHARED_MBEDTLS_LIBRARY)
-    add_library(mbedcrypto SHARED ${src_crypto})
-    set_target_properties(mbedcrypto PROPERTIES VERSION 2.24.0 SOVERSION 5)
-    target_link_libraries(mbedcrypto ${libs})
+    add_library(${mbedcrypto_target} SHARED ${src_crypto})
+    set_target_properties(${mbedcrypto_target} PROPERTIES VERSION 2.24.0 SOVERSION 5)
+    target_link_libraries(${mbedcrypto_target} ${libs})
 
-    add_library(mbedx509 SHARED ${src_x509})
-    set_target_properties(mbedx509 PROPERTIES VERSION 2.24.0 SOVERSION 1)
-    target_link_libraries(mbedx509 ${libs} mbedcrypto)
+    add_library(${mbedx509_target} SHARED ${src_x509})
+    set_target_properties(${mbedx509_target} PROPERTIES VERSION 2.24.0 SOVERSION 1)
+    target_link_libraries(${mbedx509_target} ${libs} ${mbedcrypto_target})
 
-    add_library(mbedtls SHARED ${src_tls})
-    set_target_properties(mbedtls PROPERTIES VERSION 2.24.0 SOVERSION 13)
-    target_link_libraries(mbedtls ${libs} mbedx509)
+    add_library(${mbedtls_target} SHARED ${src_tls})
+    set_target_properties(${mbedtls_target} PROPERTIES VERSION 2.24.0 SOVERSION 13)
+    target_link_libraries(${mbedtls_target} ${libs} ${mbedx509_target})
 endif(USE_SHARED_MBEDTLS_LIBRARY)
 
 foreach(target IN LISTS target_libraries)
@@ -210,7 +223,9 @@ foreach(target IN LISTS target_libraries)
             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
 endforeach(target)
 
-add_custom_target(lib DEPENDS mbedcrypto mbedx509 mbedtls)
+set(lib_target "${MBEDTLS_TARGET_PREFIX}lib")
+
+add_custom_target(${lib_target} DEPENDS ${mbedcrypto_target} ${mbedx509_target} ${mbedtls_target})
 if(USE_STATIC_MBEDTLS_LIBRARY AND USE_SHARED_MBEDTLS_LIBRARY)
-    add_dependencies(lib mbedcrypto_static mbedx509_static mbedtls_static)
+    add_dependencies(${lib_target} ${mbedcrypto_static_target} ${mbedx509_static_target} ${mbedtls_static_target})
 endif()

programs/aes/CMakeLists.txt

@@ -5,7 +5,7 @@ set(executables
 
 foreach(exe IN LISTS executables)
     add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
-    target_link_libraries(${exe} mbedcrypto)
+    target_link_libraries(${exe} ${mbedcrypto_target})
 endforeach()
 
 install(TARGETS ${executables}

programs/fuzz/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(libs
-    mbedtls
+    ${mbedtls_target}
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)

programs/hash/CMakeLists.txt

@@ -5,7 +5,7 @@ set(executables
 
 foreach(exe IN LISTS executables)
     add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
-    target_link_libraries(${exe} mbedcrypto)
+    target_link_libraries(${exe} ${mbedcrypto_target})
 endforeach()
 
 install(TARGETS ${executables}

programs/pkey/CMakeLists.txt

@@ -5,7 +5,7 @@ set(executables_mbedtls
 
 foreach(exe IN LISTS executables_mbedtls)
     add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
-    target_link_libraries(${exe} mbedtls)
+    target_link_libraries(${exe} ${mbedtls_target})
 endforeach()
 
 set(executables_mbedcrypto
@@ -31,7 +31,7 @@ set(executables_mbedcrypto
 
 foreach(exe IN LISTS executables_mbedcrypto)
     add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
-    target_link_libraries(${exe} mbedcrypto)
+    target_link_libraries(${exe} ${mbedcrypto_target})
 endforeach()
 
 install(TARGETS ${executables_mbedtls} ${executables_mbedcrypto}

programs/psa/CMakeLists.txt

@@ -6,7 +6,7 @@ set(executables
 
 foreach(exe IN LISTS executables)
     add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
-    target_link_libraries(${exe} mbedcrypto)
+    target_link_libraries(${exe} ${mbedcrypto_target})
     target_include_directories(${exe} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../tests/include)
 endforeach()
 

programs/random/CMakeLists.txt

@@ -6,7 +6,7 @@ set(executables
 
 foreach(exe IN LISTS executables)
     add_executable(${exe} ${exe}.c $<TARGET_OBJECTS:mbedtls_test>)
-    target_link_libraries(${exe} mbedcrypto)
+    target_link_libraries(${exe} ${mbedcrypto_target})
 endforeach()
 
 install(TARGETS ${executables}

programs/ssl/CMakeLists.txt

@@ -2,7 +2,7 @@ set(THREADS_USE_PTHREADS_WIN32 true)
 find_package(Threads)
 
 set(libs
-    mbedtls
+    ${mbedtls_target}
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)

programs/test/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(libs
-    mbedtls
+    ${mbedtls_target}
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)
@@ -33,7 +33,7 @@ foreach(exe IN LISTS executables_libs executables_mbedcrypto)
     if (${exe_index} GREATER -1)
         target_link_libraries(${exe} ${libs})
     else()
-        target_link_libraries(${exe} mbedcrypto)
+        target_link_libraries(${exe} ${mbedcrypto_target})
     endif()
 endforeach()
 

programs/test/cmake_subproject/CMakeLists.txt

@@ -1,5 +1,8 @@
 cmake_minimum_required(VERSION 2.6)
 
+# Test the target renaming support by adding a prefix to the targets built
+set(MBEDTLS_TARGET_PREFIX subproject_test_)
+
 # We use the parent Mbed TLS directory as the MBEDTLS_DIR for this test. Other
 # projects that use Mbed TLS as a subproject are likely to add by their own
 # relative paths.
@@ -8,11 +11,12 @@ set(MBEDTLS_DIR ../../../)
 # Add Mbed TLS as a subdirectory.
 add_subdirectory(${MBEDTLS_DIR} build)
 
-# Link against all the Mbed TLS libraries.
+# Link against all the Mbed TLS libraries. Verifies that the targets have been
+# created using the specified prefix
 set(libs
-    mbedcrypto
-    mbedx509
-    mbedtls
+    subproject_test_mbedcrypto
+    subproject_test_mbedx509
+    subproject_test_mbedtls
 )
 
 add_executable(cmake_subproject cmake_subproject.c)

programs/util/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(libs
-    mbedcrypto
+    ${mbedcrypto_target}
 )
 
 set(executables

programs/x509/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(libs
-    mbedx509
+    ${mbedx509_target}
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)
@@ -23,7 +23,7 @@ foreach(exe IN LISTS executables)
     target_link_libraries(${exe} ${libs})
 endforeach()
 
-target_link_libraries(cert_app mbedtls)
+target_link_libraries(cert_app ${mbedtls_target})
 
 install(TARGETS ${executables}
         DESTINATION "bin"

tests/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(libs
-    mbedtls
+    ${mbedtls_target}
 )
 
 # Set the project root directory if it's not already defined, as may happen if
@@ -43,7 +43,7 @@ function(add_test_suite suite_name)
     add_custom_command(
         OUTPUT test_suite_${data_name}.c
         COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/scripts/generate_test_code.py -f ${CMAKE_CURRENT_SOURCE_DIR}/suites/test_suite_${suite_name}.function -d ${CMAKE_CURRENT_SOURCE_DIR}/suites/test_suite_${data_name}.data -t ${CMAKE_CURRENT_SOURCE_DIR}/suites/main_test.function -p ${CMAKE_CURRENT_SOURCE_DIR}/suites/host_test.function -s ${CMAKE_CURRENT_SOURCE_DIR}/suites --helpers-file ${CMAKE_CURRENT_SOURCE_DIR}/suites/helpers.function -o .
-        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/scripts/generate_test_code.py mbedtls ${CMAKE_CURRENT_SOURCE_DIR}/suites/helpers.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/main_test.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/host_test.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/test_suite_${suite_name}.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/test_suite_${data_name}.data
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/scripts/generate_test_code.py ${mbedtls_target} ${CMAKE_CURRENT_SOURCE_DIR}/suites/helpers.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/main_test.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/host_test.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/test_suite_${suite_name}.function ${CMAKE_CURRENT_SOURCE_DIR}/suites/test_suite_${data_name}.data
     )
 
     add_executable(test_suite_${data_name} test_suite_${data_name}.c $<TARGET_OBJECTS:mbedtls_test>)