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Fix detection of Protocol Buffers when using CMake < 3.6

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This commit is contained in:
Carles Fernandez 2019-04-23 11:58:18 +02:00
parent e0f3fe66f0
commit 8ab202b666
1 changed files with 31 additions and 0 deletions
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31
CMakeLists.txt
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@ -1797,7 +1797,24 @@ set_package_properties(Protobuf PROPERTIES
PURPOSE "Used to serialize output data in a way that can be read by other applications."
TYPE REQUIRED
)
if(CMAKE_VERSION VERSION_LESS 3.6)
if(PROTOBUF_FOUND)
set(Protobuf_FOUND ${PROTOBUF_FOUND})
endif()
endif()
if(Protobuf_FOUND AND CMAKE_VERSION VERSION_LESS 3.9)
if(PROTOBUF_INCLUDE_DIR)
set(Protobuf_INCLUDE_DIR ${PROTOBUF_INCLUDE_DIR})
endif()
if(PROTOBUF_LIBRARY)
set(Protobuf_LIBRARY ${PROTOBUF_LIBRARY})
endif()
if(PROTOBUF_PROTOC_EXECUTABLE)
set(Protobuf_PROTOC_EXECUTABLE ${PROTOBUF_PROTOC_EXECUTABLE})
endif()
if(PROTOBUF_PROTOC_LIBRARY)
set(Protobuf_PROTOC_LIBRARY ${PROTOBUF_PROTOC_EXECUTABLE})
endif()
add_library(protobuf::libprotobuf SHARED IMPORTED)
set_target_properties(protobuf::libprotobuf PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
@ -1811,6 +1828,20 @@ if(Protobuf_FOUND AND CMAKE_VERSION VERSION_LESS 3.9)
IMPORTED_LOCATION "${Protobuf_PROTOC_EXECUTABLE}"
INTERFACE_LINK_LIBRARIES "${Protobuf_PROTOC_LIBRARY}"
)
if(${Protobuf_VERSION} VERSION_EQUAL "0.0.0")
set(_PROTOBUF_COMMON_HEADER ${Protobuf_INCLUDE_DIR}/google/protobuf/stubs/common.h)
set(Protobuf_VERSION "")
set(Protobuf_LIB_VERSION "")
file(STRINGS ${_PROTOBUF_COMMON_HEADER} _PROTOBUF_COMMON_H_CONTENTS REGEX "#define[ \t]+GOOGLE_PROTOBUF_VERSION[ \t]+")
if(_PROTOBUF_COMMON_H_CONTENTS MATCHES "#define[ \t]+GOOGLE_PROTOBUF_VERSION[ \t]+([0-9]+)")
set(Protobuf_LIB_VERSION "${CMAKE_MATCH_1}")
endif()
unset(_PROTOBUF_COMMON_H_CONTENTS)
math(EXPR _PROTOBUF_MAJOR_VERSION "${Protobuf_LIB_VERSION} / 1000000")
math(EXPR _PROTOBUF_MINOR_VERSION "${Protobuf_LIB_VERSION} / 1000 % 1000")
math(EXPR _PROTOBUF_SUBMINOR_VERSION "${Protobuf_LIB_VERSION} % 1000")
set(Protobuf_VERSION "${_PROTOBUF_MAJOR_VERSION}.${_PROTOBUF_MINOR_VERSION}.${_PROTOBUF_SUBMINOR_VERSION}")
endif()
endif()
if(Protobuf_FOUND AND CMAKE_CROSSCOMPILING)
find_program(PROTOC_EXECUTABLE protoc