CMakeLists.txt

cmake_minimum_required(VERSION 2.8.10)
project(echo_c++ C CXX)

option(EXAMPLE_LINK_SO "Whether examples are linked dynamically" OFF)

execute_process(
    COMMAND bash -c "find ${CMAKE_SOURCE_DIR}/../.. -type d -name \"include\" | xargs dirname | tr -d '\n'"
    OUTPUT_VARIABLE OUTPUT_PATH
)

set(CMAKE_PREFIX_PATH ${OUTPUT_PATH})

include(FindThreads)
include(FindProtobuf)
protobuf_generate_cpp(PROTO_SRC PROTO_HEADER echo.proto)
# include PROTO_HEADER
include_directories(${CMAKE_CURRENT_BINARY_DIR})

find_path(BRPC_INCLUDE_PATH NAMES brpc/server.h)
if(EXAMPLE_LINK_SO)
    find_library(BRPC_LIB NAMES brpc)
else()
    find_library(BRPC_LIB NAMES libbrpc_static.a brpc)
endif()
if((NOT BRPC_INCLUDE_PATH) OR (NOT BRPC_LIB))
    message(FATAL_ERROR "Fail to find brpc")
endif()
include_directories(${BRPC_INCLUDE_PATH})

find_path(GFLAGS_INCLUDE_PATH gflags/gflags.h)
find_library(GFLAGS_LIBRARY NAMES gflags libgflags)
if((NOT GFLAGS_INCLUDE_PATH) OR (NOT GFLAGS_LIBRARY))
    message(FATAL_ERROR "Fail to find gflags")
endif()
include_directories(${GFLAGS_INCLUDE_PATH})

execute_process(
    COMMAND bash -c "grep \"namespace [_A-Za-z0-9]\\+ {\" ${GFLAGS_INCLUDE_PATH}/gflags/gflags_declare.h | head -1 | awk '{print $2}' | tr -d '\n'"
    OUTPUT_VARIABLE GFLAGS_NS
)
if(${GFLAGS_NS} STREQUAL "GFLAGS_NAMESPACE")
    execute_process(
        COMMAND bash -c "grep \"#define GFLAGS_NAMESPACE [_A-Za-z0-9]\\+\" ${GFLAGS_INCLUDE_PATH}/gflags/gflags_declare.h | head -1 | awk '{print $3}' | tr -d '\n'"
        OUTPUT_VARIABLE GFLAGS_NS
    )
endif()
set(CMAKE_CPP_FLAGS "-DGFLAGS_NS=${GFLAGS_NS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CPP_FLAGS} -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Wno-unused-parameter -fPIC -fno-omit-frame-pointer")

if(CMAKE_VERSION VERSION_LESS "3.1.3")
    if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
    endif()
    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
    endif()
else()
    set(CMAKE_CXX_STANDARD 11)
    set(CMAKE_CXX_STANDARD_REQUIRED ON)
endif()

find_path(LEVELDB_INCLUDE_PATH NAMES leveldb/db.h)
find_library(LEVELDB_LIB NAMES leveldb)
if ((NOT LEVELDB_INCLUDE_PATH) OR (NOT LEVELDB_LIB))
    message(FATAL_ERROR "Fail to find leveldb")
endif()
include_directories(${LEVELDB_INCLUDE_PATH})

find_library(SSL_LIB NAMES ssl)
if (NOT SSL_LIB)
    message(FATAL_ERROR "Fail to find ssl")
endif()

find_library(CRYPTO_LIB NAMES crypto)
if (NOT CRYPTO_LIB)
    message(FATAL_ERROR "Fail to find crypto")
endif()

add_executable(echo_client client.cpp ${PROTO_SRC} ${PROTO_HEADER})
add_executable(echo_server server.cpp ${PROTO_SRC} ${PROTO_HEADER})

set(DYNAMIC_LIB
    ${CMAKE_THREAD_LIBS_INIT}
    ${GFLAGS_LIBRARY}
    ${PROTOBUF_LIBRARIES}
    ${LEVELDB_LIB}
    ${SSL_LIB}
    ${CRYPTO_LIB}
    dl
    )

if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
    set(DYNAMIC_LIB ${DYNAMIC_LIB}
        pthread
        "-framework CoreFoundation"
        "-framework CoreGraphics"
        "-framework CoreData"
        "-framework CoreText"
        "-framework Security"
        "-framework Foundation"
        "-Wl,-U,_MallocExtension_ReleaseFreeMemory"
        "-Wl,-U,_ProfilerStart"
        "-Wl,-U,_ProfilerStop")
endif()

target_link_libraries(echo_client ${BRPC_LIB} ${DYNAMIC_LIB})
target_link_libraries(echo_server ${BRPC_LIB} ${DYNAMIC_LIB})