1# Copyright 2017 gRPC authors.
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#     http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
15# The CMakeLists.txt for BoringSSL doesn't propagate include directories
16# transitively so `_gRPC_SSL_INCLUDE_DIR` should be set for gRPC
17# to find header files.
18
19if(gRPC_SSL_PROVIDER STREQUAL "module")
20  if(NOT BORINGSSL_ROOT_DIR)
21    set(BORINGSSL_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/boringssl-with-bazel)
22  endif()
23
24  if(EXISTS "${BORINGSSL_ROOT_DIR}/CMakeLists.txt")
25    if(CMAKE_GENERATOR MATCHES "Visual Studio")
26      if(CMAKE_VERSION VERSION_LESS 3.13)
27        # Visual Studio build with assembly optimizations is broken for older
28        # version of CMake (< 3.13).
29        message(WARNING "Disabling SSL assembly support because CMake version ${CMAKE_VERSION} is too old (less than 3.13)")
30        set(OPENSSL_NO_ASM ON)
31      else()
32        # If we're using a new enough version of CMake, make sure that the
33        # NASM assembler can be found.
34        include(CheckLanguage)
35        check_language(ASM_NASM)
36        if(NOT CMAKE_ASM_NASM_COMPILER)
37          message(WARNING "Disabling SSL assembly support because NASM could not be found")
38          set(OPENSSL_NO_ASM ON)
39        endif()
40      endif()
41    endif()
42
43    add_subdirectory(${BORINGSSL_ROOT_DIR} third_party/boringssl-with-bazel)
44    if(TARGET ssl)
45      set(_gRPC_SSL_LIBRARIES ssl crypto)
46      set(_gRPC_SSL_INCLUDE_DIR ${BORINGSSL_ROOT_DIR}/src/include)
47      if(gRPC_INSTALL AND _gRPC_INSTALL_SUPPORTED_FROM_MODULE)
48        install(TARGETS ssl crypto EXPORT gRPCTargets
49          RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
50          LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
51          ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR})
52      endif()
53    endif()
54  else()
55    message(WARNING "gRPC_SSL_PROVIDER is \"module\" but BORINGSSL_ROOT_DIR is wrong")
56  endif()
57  if(gRPC_INSTALL AND NOT _gRPC_INSTALL_SUPPORTED_FROM_MODULE)
58    message(WARNING "gRPC_INSTALL will be forced to FALSE because gRPC_SSL_PROVIDER is \"module\" and CMake version (${CMAKE_VERSION}) is less than 3.13.")
59    set(gRPC_INSTALL FALSE)
60  endif()
61elseif(gRPC_SSL_PROVIDER STREQUAL "package")
62  # OpenSSL installation directory can be configured by setting OPENSSL_ROOT_DIR
63  # We expect to locate OpenSSL using the built-in cmake module as the openssl
64  # project itself does not provide installation support in its CMakeLists.txt
65  # See https://cmake.org/cmake/help/v3.6/module/FindOpenSSL.html
66  find_package(OpenSSL REQUIRED)
67
68  if(TARGET OpenSSL::SSL)
69    set(_gRPC_SSL_LIBRARIES OpenSSL::SSL OpenSSL::Crypto)
70  else()
71    set(_gRPC_SSL_LIBRARIES ${OPENSSL_LIBRARIES})
72  endif()
73  set(_gRPC_SSL_INCLUDE_DIR ${OPENSSL_INCLUDE_DIR})
74
75  set(_gRPC_FIND_SSL "if(NOT OPENSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
76endif()
77