在我们的测试环境中编译时遇到了以下问题:

尽管窗口已经在工作，但我们在 Freebsd 9 上的构建失败并显示以下错误消息:

error: no member named 'all_of' in namespace 'std'

鉴于我将 -std=c++11 添加到我们的 Cmake 标志中，我想知道为什么这不起作用。

clang version 3.4 (tags/RELEASE_34/final)
Target: i386-portbld-freebsd9.1
Thread model: posix

函数如下

#include <algorithm>
...
inline bool is_positive_number(const std::string & str)
{
    if (str.empty())
            return false;

    return std::all_of(str.begin(), str.end(), ::isdigit);
}

来自 pkg install clang34 的安装程序日志

Installing libexecinfo: 1.1_3
Installing llvm34: 3.4_1
Installing clang34: 3.4_2

感谢帮助我认为这个功能是很久以前实现的，但显然我用错了，或者我可能完全误解了一些东西，这两种情况都是可能的，我对 clang 很陌生。

编辑:过程的详细信息。

Selected GCC installation:
 "/usr/local/llvm34/bin/clang" -cc1 -triple i386-portbld-freebsd9.1 -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name main.cpp -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-cpu i486 -target-linker-version 2.17.50 -v -v -g -coverage-file /home/source/release/server/game/CMakeFiles/game_r4708M_32.dir/src/main.cpp.o -resource-dir /usr/local/llvm34/bin/../lib/clang/3.4 -D "__SVN_VERSION__=\"\"" -I /home/source/release/server/game/../../extern/include/boost -I /home/source/release/server/game/../../extern/include -I /home/source/release/server/game/../libmysql/mysql-connector-c-6.1.5-src/output/freebsd/include -I /home/source/release/server/game/../liblua/include -I /home/source/release/server/game/../libdevil -internal-isystem /usr/include/c++/4.2 -internal-isystem /usr/include/c++/4.2/backward -Wno-invalid-source-encoding -W -Wno-invalid-source-encoding -W -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /home/source/release/server/game -ferror-limit 19 -fmessage-length 237 -mstackrealign -fobjc-runtime=gnustep -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -o CMakeFiles/game_r4708M_32.dir/src/main.cpp.o -x c++ /home/source/release/server/game/src/main.cpp
clang -cc1 version 3.4 based upon LLVM 3.4 default target i386-portbld-freebsd9.1
ignoring duplicate directory "/usr/include/c++/4.2"
ignoring duplicate directory "/usr/include/c++/4.2"
ignoring duplicate directory "/usr/include/c++/4.2/backward"
#include "..." search starts here:
#include <...> search starts here:
 /home/source/release/server/game/../../extern/include/boost
 /home/source/release/server/game/../../extern/include
 /home/source/release/server/game/../libmysql/mysql-connector-c-6.1.5-src/output/freebsd/include
 /home/source/release/server/game/../liblua/include
 /home/source/release/server/game/../libdevil
 /usr/include/c++/4.2
 /usr/include/c++/4.2/backward
 /usr/local/llvm34/bin/../lib/clang/3.4/include

按照 Steve Wills 的建议切换到“-stdlib=libc++”后，我假设它选择了正确的包含路径 (v1)，但它仍然没有找到或发生冲突。

 clang version 3.4 (tags/RELEASE_34/final)
Target: i386-portbld-freebsd9.1
Thread model: posix
Selected GCC installation:
 "/usr/local/llvm34/bin/clang" -cc1 -triple i386-portbld-freebsd9.1 -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name main.cpp -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-cpu i486 -target-linker-version 2.17.50 -v -v -g -coverage-file /home/source/release/server/game/CMakeFiles/game_r4708M_32.dir/src/main.cpp.o -resource-dir /usr/local/llvm34/bin/../lib/clang/3.4 -D "__SVN_VERSION__=\"\"" -I /home/source/release/server/game/../../extern/include/boost -I /home/source/release/server/game/../../extern/include -I /home/source/release/server/game/../libmysql/mysql-connector-c-6.1.5-src/output/freebsd/include -I /home/source/release/server/game/../liblua/include -I /home/source/release/server/game/../libdevil -internal-isystem /usr/include/c++/v1 -Wno-invalid-source-encoding -W -Wno-invalid-source-encoding -W -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /home/source/release/server/game -ferror-limit 19 -fmessage-length 237 -mstackrealign -fobjc-runtime=gnustep -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -o CMakeFiles/game_r4708M_32.dir/src/main.cpp.o -x c++ /home/source/release/server/game/src/main.cpp
clang -cc1 version 3.4 based upon LLVM 3.4 default target i386-portbld-freebsd9.1
ignoring duplicate directory "/usr/include/c++/4.2"
#include "..." search starts here:
#include <...> search starts here:
 /home/source/release/server/game/../../extern/include/boost
 /home/source/release/server/game/../../extern/include
 /home/source/release/server/game/../libmysql/mysql-connector-c-6.1.5-src/output/freebsd/include
 /home/source/release/server/game/../liblua/include
 /home/source/release/server/game/../libdevil
 /usr/include/c++/v1
 /usr/include/c++/4.2
 /usr/include/c++/4.2/backward
 /usr/local/llvm34/bin/../lib/clang/3.4/include
 /usr/include
End of search list.
In file included from /home/source/release/server/game/src/main.cpp:1:
In file included from /home/source/release/server/game/src/stdafx.h:12:
/home/source/release/server/game/src/../../common/utils.h:120:14: error: no member named 'all_of' in namespace 'std'

最佳答案

此错误可能是由于缺少:

set( CMAKE_CXX_STANDARD 11 )

关于c++ - Clang 无法识别 <algorithm> 中的 std::all_of，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24764478/