# Copyright (c) PLUMgrid, Inc.

# Licensed under the Apache License, Version 2.0 (the "License")

include_directories(${CMAKE_CURRENT_BINARY_DIR})

include_directories(${CMAKE_CURRENT_SOURCE_DIR})

# to be removed

include_directories(${CMAKE_CURRENT_BINARY_DIR}/frontends/b)

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/frontends/b)

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/frontends/clang)

include_directories(${LLVM_INCLUDE_DIRS})

include_directories(${LIBELF_INCLUDE_DIRS})

# todo: if check for kernel version

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/compat)

add_definitions(${LLVM_DEFINITIONS})

configure_file(libbcc.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libbcc.pc @ONLY)

# prune unused llvm static library stuff when linking into the new .so

set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--exclude-libs=ALL")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")

# only turn on static-libstdc++ if also linking statically against clang

string(REGEX MATCH ".*[.]a$" LIBCLANG_ISSTATIC "${libclangBasic}")

# if gcc 4.9 or higher is used, static libstdc++ is a good option

if (CMAKE_COMPILER_IS_GNUCC AND LIBCLANG_ISSTATIC)

execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)

if (GCC_VERSION VERSION_GREATER 4.9 OR GCC_VERSION VERSION_EQUAL 4.9)

execute_process(COMMAND ${CMAKE_C_COMPILER} -print-libgcc-file-name OUTPUT_VARIABLE GCC_LIB)

get_filename_component(GCC_DIR "${GCC_LIB}" DIRECTORY)

find_library(GCC_LIBSTDCPP libstdc++.a PATHS "${GCC_DIR}" NO_DEFAULT_PATH)

if (GCC_LIBSTDCPP)

message(STATUS "Using static-libstdc++")

set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-libstdc++")

endif()

endif()

endif()

add_library(bcc-shared SHARED bpf_common.cc bpf_module.cc libbpf.c perf_reader.c table_storage.cc shared_table.cc bpffs_table.cc json_map_decl_visitor.cc exported_files.cc bcc_elf.c bcc_perf_map.c bcc_proc.c bcc_syms.cc usdt_args.cc usdt.cc common.cc BPF.cc BPFTable.cc)

set_target_properties(bcc-shared PROPERTIES VERSION ${REVISION_LAST} SOVERSION 0)

set_target_properties(bcc-shared PROPERTIES OUTPUT_NAME bcc)

add_library(bcc-loader-static STATIC libbpf.c perf_reader.c bcc_elf.c bcc_perf_map.c bcc_proc.c bcc_syms.cc)

add_library(bcc-static STATIC bpf_common.cc bpf_module.cc shared_table.cc bpffs_table.cc json_map_decl_visitor.cc table_storage.cc exported_files.cc usdt_args.cc usdt.cc common.cc BPF.cc BPFTable.cc)

set_target_properties(bcc-static PROPERTIES OUTPUT_NAME bcc)

set(llvm_raw_libs bitwriter bpfcodegen irreader linker

mcjit objcarcopts option passes nativecodegen lto)

list(FIND LLVM_AVAILABLE_LIBS "LLVMCoverage" _llvm_coverage)

if (${_llvm_coverage} GREATER -1)

list(APPEND llvm_raw_libs coverage)

endif()

list(FIND LLVM_AVAILABLE_LIBS "LLVMCoroutines" _llvm_coroutines)

if (${_llvm_coroutines} GREATER -1)

list(APPEND llvm_raw_libs coroutines)

endif()

llvm_map_components_to_libnames(llvm_libs ${llvm_raw_libs})

llvm_expand_dependencies(expanded_libs ${llvm_libs})

# order is important

set(clang_libs ${libclangFrontend} ${libclangSerialization} ${libclangDriver} ${libclangParse}

${libclangSema} ${libclangCodeGen} ${libclangAnalysis} ${libclangRewrite} ${libclangEdit}

${libclangAST} ${libclangLex} ${libclangBasic})

# Link against LLVM libraries

target_link_libraries(bcc-shared b_frontend clang_frontend ${clang_libs} ${expanded_libs} ${LIBELF_LIBRARIES})

target_link_libraries(bcc-static b_frontend clang_frontend bcc-loader-static ${clang_libs} ${expanded_libs} ${LIBELF_LIBRARIES})

install(TARGETS bcc-shared LIBRARY COMPONENT libbcc

DESTINATION ${CMAKE_INSTALL_LIBDIR})

install(FILES bpf_common.h bpf_module.h bcc_syms.h bcc_exception.h file_desc.h

libbpf.h perf_reader.h BPF.h BPFTable.h shared_table.h

table_desc.h table_storage.h COMPONENT libbcc

DESTINATION include/bcc)

install(DIRECTORY compat/linux/ COMPONENT libbcc

DESTINATION include/bcc/compat/linux

FILES_MATCHING PATTERN "*.h")

install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libbcc.pc COMPONENT libbcc

DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)

add_subdirectory(frontends)