使用"coverage"模式，链接bin文件时出现错误 hidden symbol `__gcov_init'

[fengqianliuli]

Xmake 版本

2.6.9

操作系统版本和架构

Linux version 5.4.0-121-generic (buildd@lcy02-amd64-013) (gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.1)) #137-Ubuntu SMP Wed Jun 15 13:33:07 UTC 2022

描述问题

• 首先我的项目使用xmake是正常编译的

1. 添加coverage模式，在最外层xmake.lua添加 add_rules("mode.coverage")
2. 编译，xmake f -m coverage；xmake
3. xmake执行时报错，另外虽然bin文件链接出错，但是build/.objs目录下仍然会生成 .gcno文件
   [ 90%]: linking.coverage persistency_test
   error: /usr/bin/ld: build/linux/x86_64/coverage/persistency_test: hidden symbol `__gcov_init' in /usr/lib/gcc/x86_64-linux-gnu/9/libgcov.a(_gcov.o) is referenced by DSO
   /usr/bin/ld: final link failed: bad value
   collect2: error: ld returned 1 exit status

期待的结果

正常编译生成unittest可执行程序

工程配置

-- define project
set_project("persistency")

-- set common config
add_rules("mode.asan", "mode.coverage")
set_languages("c99", "cxx17")
add_includedirs("./", "$(projectdir)/../common/core/include")

if is_mode("debug") then
  set_symbols("debug")
  set_optimize("none")
  add_cxflags("-Wall", "-Werror", "-Wunused-parameter")
end

if is_mode("release") then
  set_symbols("debug")
  set_optimize("faster")
  set_strip("all")
  add_cxflags("-DNDEBUG", "-Wall", "-Werror", "-Wunused-parameter")
end

if is_mode("asan") then
  add_ldflags("-fsanitize=address", {force = true})
end

-- includes sub-projects
includes("src", "test")



### 附加信息和错误日志

➜  per git:(develop) ✗ xmake -vD          
checking for gcc ... /usr/bin/gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for the c++ compiler (cxx) ... gcc
checking for /usr/bin/gcc ... ok
checking for flags (-fPIC) ... ok
> gcc "-fPIC"
checking for flags (-fvisibility-inlines-hidden) ... ok
> gcc "-fvisibility-inlines-hidden"
checking for flags (-O0) ... ok
> gcc "-O0"
checking for flags (--coverage) ... ok
> gcc "--coverage"
[ 20%]: ccache compiling.coverage test/file_storage_test.cpp
/usr/bin/gcc -c -m64 -g -Wall -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -I/home/haotian.shi/boyan/out/tmprootfs/usr/include -Itest -I/home/haotian.shi/boyan/per/../third_party --coverage -o build/.objs/persistency_test/linux/x86_64/coverage/test/file_storage_test.cpp.o test/file_storage_test.cpp
[ 20%]: ccache compiling.coverage src/file_storage/read_write_accessor_with_filelock.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_write_accessor_with_filelock.cpp.o src/file_storage/read_write_accessor_with_filelock.cpp
[ 20%]: ccache compiling.coverage src/file_storage/read_accessor_with_filelock.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_accessor_with_filelock.cpp.o src/file_storage/read_accessor_with_filelock.cpp
[ 20%]: ccache compiling.coverage src/key_value_storage/kvs_json_impl.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/key_value_storage/kvs_json_impl.cpp.o src/key_value_storage/kvs_json_impl.cpp
[ 20%]: ccache compiling.coverage src/file_storage/read_accessor_impl.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_accessor_impl.cpp.o src/file_storage/read_accessor_impl.cpp
[ 20%]: ccache compiling.coverage src/file_storage/file_storage_impl.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/file_storage_impl.cpp.o src/file_storage/file_storage_impl.cpp
[ 20%]: ccache compiling.coverage test/json_key_value_test.cpp
/usr/bin/gcc -c -m64 -g -Wall -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -I/home/haotian.shi/boyan/out/tmprootfs/usr/include -Itest -I/home/haotian.shi/boyan/per/../third_party --coverage -o build/.objs/persistency_test/linux/x86_64/coverage/test/json_key_value_test.cpp.o test/json_key_value_test.cpp
[ 20%]: ccache compiling.coverage test/main.cpp
/usr/bin/gcc -c -m64 -g -Wall -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -I/home/haotian.shi/boyan/out/tmprootfs/usr/include -Itest -I/home/haotian.shi/boyan/per/../third_party --coverage -o build/.objs/persistency_test/linux/x86_64/coverage/test/main.cpp.o test/main.cpp
[ 20%]: ccache compiling.coverage test/sqlite_key_value_test.cpp
/usr/bin/gcc -c -m64 -g -Wall -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -I/home/haotian.shi/boyan/out/tmprootfs/usr/include -Itest -I/home/haotian.shi/boyan/per/../third_party --coverage -o build/.objs/persistency_test/linux/x86_64/coverage/test/sqlite_key_value_test.cpp.o test/sqlite_key_value_test.cpp
[ 20%]: ccache compiling.coverage src/key_value_storage/key_value_storage.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/key_value_storage/key_value_storage.cpp.o src/key_value_storage/key_value_storage.cpp
[ 20%]: ccache compiling.coverage src/key_value_storage/kvs_sql_impl.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/key_value_storage/kvs_sql_impl.cpp.o src/key_value_storage/kvs_sql_impl.cpp
[ 20%]: ccache compiling.coverage src/file_storage/read_write_accessor_impl.cpp
/usr/bin/gcc -c -m64 -fPIC -g -O0 -std=c++17 -I. -I/home/haotian.shi/boyan/per/../common/core/include -Isrc -I/home/haotian.shi/boyan/per/../third_party -I/home/haotian.shi/boyan/per/../third_party/boost --coverage -o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_write_accessor_impl.cpp.o src/file_storage/read_write_accessor_impl.cpp
checking for flags (-MMD -MF) ... ok
> gcc "-MMD" "-MF" "/dev/null"
checking for flags (-fdiagnostics-color=always) ... ok
> gcc "-fdiagnostics-color=always"
checking for g++ ... /usr/bin/g++
checking for the shared library linker (sh) ... g++
checking for /usr/bin/g++ ... ok
checking for flags (-fPIC) ... ok
> g++ "-fPIC" "-shared"
[ 80%]: linking.coverage libpersistency.so
/usr/bin/g++ -o build/linux/x86_64/coverage/libpersistency.so build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_write_accessor_impl.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_write_accessor_with_filelock.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/file_storage_impl.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_accessor_with_filelock.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/file_storage/read_accessor_impl.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/key_value_storage/key_value_storage.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/key_value_storage/kvs_sql_impl.cpp.o build/.objs/persistency/linux/x86_64/coverage/src/key_value_storage/kvs_json_impl.cpp.o -shared -fPIC -m64 -L/home/haotian.shi/boyan/out/tmprootfs/usr/lib -lsqlite -ldl
checking for g++ ... /usr/bin/g++
checking for the linker (ld) ... g++
checking for flags (-fPIC) ... ok
> g++ "-fPIC"
checking for flags (-Wl,-rpath=@loader_path) ... ok
> g++ "-Wl,-rpath=@loader_path" "-m64" "-m64"
checking for flags (--coverage) ... ok
> g++ "--coverage" "-m64" "-m64"
[ 90%]: linking.coverage persistency_test
/usr/bin/g++ -o build/linux/x86_64/coverage/persistency_test build/.objs/persistency_test/linux/x86_64/coverage/test/file_storage_test.cpp.o build/.objs/persistency_test/linux/x86_64/coverage/test/json_key_value_test.cpp.o build/.objs/persistency_test/linux/x86_64/coverage/test/sqlite_key_value_test.cpp.o build/.objs/persistency_test/linux/x86_64/coverage/test/main.cpp.o -m64 -L/home/haotian.shi/boyan/out/tmprootfs/usr/lib -Lbuild/linux/x86_64/coverage -Wl,-rpath=$ORIGIN -lgtest -lsqlite -lpersistency -lpthread -ldl -fprofile-arcs -ftest-coverage --coverage
error: @programdir/modules/private/async/runjobs.lua:256: @programdir/actions/build/kinds/binary.lua:74: @programdir/core/sandbox/modules/os.lua:257: /usr/bin/ld: build/linux/x86_64/coverage/persistency_test: hidden symbol `__gcov_init' in /usr/lib/gcc/x86_64-linux-gnu/9/libgcov.a(_gcov.o) is referenced by DSO
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status

stack traceback:
    [C]: in function 'error'
    [@programdir/core/base/os.lua:872]:
    [@programdir/core/sandbox/modules/os.lua:257]: in function 'runv'
    [@programdir/modules/core/tools/gcc.lua:374]:
    [C]: in function 'xpcall'
    [@programdir/core/base/utils.lua:280]:
    [@programdir/actions/build/kinds/binary.lua:74]: in function 'callback'
    [@programdir/modules/core/project/depend.lua:189]: in function 'on_changed'
    [@programdir/actions/build/kinds/binary.lua:55]: in function '_do_link_target'
    [@programdir/actions/build/kinds/binary.lua:102]:
    [@programdir/actions/build/kinds/binary.lua:129]: in function '_link_target'
    [@programdir/actions/build/kinds/binary.lua:157]: in function 'jobfunc'
    [@programdir/modules/private/async/runjobs.lua:232]:
    [C]: in function 'xpcall'
    [@programdir/core/base/utils.lua:280]: in function 'trycall'
    [@programdir/core/sandbox/modules/try.lua:121]: in function 'try'
    [@programdir/modules/private/async/runjobs.lua:218]: in function 'cotask'
    [@programdir/core/base/scheduler.lua:388]:

stack traceback:
        [C]: in function 'error'
        @programdir/core/base/os.lua:872: in function 'base/os.raiselevel'
        (...tail calls...)
        @programdir/modules/private/async/runjobs.lua:256: in field 'catch'
        @programdir/core/sandbox/modules/try.lua:127: in global 'try'
        @programdir/modules/private/async/runjobs.lua:218: in upvalue 'cotask'
        @programdir/core/base/scheduler.lua:388: in function <@programdir/core/base/scheduler.lua:385>

[fengqianliuli]

已解决，需要在动态库链接时，添加gcov的链接

[waruqi]

修复了，你更新到 dev 再试试，不需要额外的 -lgcov，这个不通用，对 clang 不适用。。

主要是因为 mode.coverage rule 仅仅对 ldflags 加了 --coverage flag，对 so 库忘记加了，shflags 上也加上 --coverage 就行了，它会自动 link 上对应的 -lgcov