cling编译、使用
2. cling使用
经过 1. cling编译 后 ，即可使用如下（c++像脚本一样被使用）：
上手 : On-the-fly-C++/ ， cling-cpp-11-interpreter/
hello
/app5/cling-build/bin/cling #进入交互式界面#也可以脚本样式执行
echo '''
#include <iostream>
std::cout << "hello" << std::endl;
''' | /app5/cling-build/bin/cling
#输出hello
cling无子进程 且 默认只有一个线程
#cling无子进程:
pgrep --parent `pidof cling`#cling默认只有一个线程:
ls /proc/`pidof cling`/task/ | wc -l # == 1
查函数签名
#include <pthread.h>pthread //tab tab 后 有相关结构体补全pthread_create //回车后有函数签名
/*
(int (*)(pthread_t *__restrict, const pthread_attr_t *__restrict, void *(*)(void *), void *__restrict) noexcept(true)) Function @0x7d1d8a494c40at /usr/include/pthread.h:202:
extern int pthread_create (pthread_t *__restrict __newthread,const pthread_attr_t *__restrict __attr,void *(*__start_routine) (void *),void *__restrict __arg) __THROWNL __nonnull ((1, 3))
*/
c++ std 文本文件按行读取
#include <fstream>
#include <iostream>
#include <string>
#include <vector>
std::string ln;
std::vector<std::string> lnVec;
std::ifstream ifile("f1.txt");
if(!ifile.is_open()) exit(1);
ifile.fail(); //false
while(true){std::getline(ifile,ln);if(ifile.fail()){ break; }lnVec.push_back(ln);
}
ifile.fail(); //true
lnVec;// (std::vector<std::string> &) { "aaaa", "bbb", "ccc" }
ifile.close();
ifile.is_open(); //false
.help
/app5/cling-build/bin/cling 进入交互式界面
****************** CLING ******************
* Type C++ code and press enter to run it *
* Type .q to exit *
*******************************************
[cling]$ .helpCling (C/C++ interpreter) meta commands usageAll commands must be preceded by a '.', exceptfor the evaluation statement { }==============================================================================Syntax: .Command [arg0 arg1 ... argN].L <filename> - Load the given file or library.(x|X) <filename>[(args)] - Same as .L and runs a function withsignature: ret_type filename(args).> <filename> - Redirect command to a given file'>' or '1>' - Redirects the stdout stream only'2>' - Redirects the stderr stream only'&>' (or '2>&1') - Redirects both stdout and stderr'>>' - Appends to the given file.undo [n] - Unloads the last 'n' inputs lines.U <filename> - Unloads the given file.(I|include) [path] - Shows all include paths. If a path is given,adds the path to the include paths..O <level> - Sets the optimization level (0-3)If no level is given, prints the current setting..class <name> - Prints out class <name> in a CINT-like style (one-level).If no name is given, prints out list of all classes..Class <name> - Prints out class <name> in a CINT-like style (all-levels).If no name is given, prints out list of all classes..namespace - Prints list of all known namespaces.typedef <name> - Prints out typedef <name> in a CINT-like styleIf no name is given, prints out list of all typedefs..files - Prints names of all included (parsed) files.fileEx - Prints out included (parsed) file statisticsas well as a list of their names.g <var> - Prints out information about global variable'var' - if no name is given, print them all.@ - Cancels and ignores the multiline input.rawInput [0|1] - Toggle wrapping and printing theexecution results of the input.dynamicExtensions [0|1] - Toggles the use of the dynamic scopesand the late binding.debug <level> - Generates debug symbols (level is optional, 0 to disable).printDebug [0|1] - Toggles the printing of input's correspondingstate changes.storeState <filename> - Store the interpreter's state to a given file.compareState <filename> - Compare the interpreter's state with the onesaved in a given file.stats [name] - Show stats for internal data structures'ast' abstract syntax tree stats'asttree [filter]' abstract syntax tree layout'decl' dump ast declarations'undo' show undo stack.T <filePath> <comment> - Generate autoload map.trace <repr> <id> - Dump trace of requested respresentation(see .stats arguments for <repr>).help - Shows this information (also .?).q - Exit the program1. cling编译
vgvassilev/cling.git/readme.md/编译步骤
binD=/app5/cling-build
mkdir $binDD=/app5/llvm-home
mkdir $D #欧洲高能物理数据分析 ROOT
git clone https://github.com/root-project/llvm-project.git $D
#/app5/llvm-home/llvm-project/.git/config
llvmD=$D/llvm-project # == /app5/llvm-home/llvm-projectgit clone https://github.com/root-project/cling.git $D
#/app5/llvm-home/cling/.git/config
clingD=$D/cling # == /app5/llvm-home/cling#配置
cmake -DLLVM_EXTERNAL_PROJECTS=cling -DLLVM_EXTERNAL_CLING_SOURCE_DIR=$clingD -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_TARGETS_TO_BUILD="host;NVPTX" -DCMAKE_BUILD_TYPE=Release $llvmD/llvm
#命令展开: cmake -DLLVM_EXTERNAL_PROJECTS=cling -DLLVM_EXTERNAL_CLING_SOURCE_DIR=/app5/llvm-home/cling -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_TARGETS_TO_BUILD="host;" -DCMAKE_BUILD_TYPE=Release /app5/llvm-home/llvm-project/llvm#编译clang
cmake --build $binD --target clang -j10#编译cling
cmake --build $binD --target cling -j10issues/531#issuecomment-2337234891
所用版本
#/app5/llvm-home/llvm-project/.git/config
#llvmD=$D/llvm-project # == /app5/llvm-home/llvm-project
git --git-dir=$llvmD/.git rev-parse HEAD # == 66d752c5c714ac57b468e1b4d62a52f9207b5d44
git --git-dir=$llvmD/.git branch # == ROOT-llvm18
git --git-dir=$llvmD/.git --no-pager log --format=oneline | head -n 1
#66d752c5c714ac57b468e1b4d62a52f9207b5d44 Do not install {Clang,Cling}Config.cmake in the project lib dir.#/app5/llvm-home/cling/.git/config
#clingD=$D/cling # == /app5/llvm-home/cling
git --git-dir=$clingD/.git rev-parse HEAD # == 1d4925536b9f89015ad2afdc24e260207dd69ebb
git --git-dir=$clingD/.git branch # == master
git --git-dir=$clingD/.git --no-pager log --format=oneline | head -n 1
#1d4925536b9f89015ad2afdc24e260207dd69ebb Move static init function renaming to `BackendPasses.cpp`1B. cling编译备忘
若不编译clang会报错 resource directory /app5/llvm-home/cling-build/lib/clang/18 not found!
cd /app5/llvm-home/cling-build/
./bin/cling
ERROR in cling::CIFactory::createCI():resource directory /app5/llvm-home/cling-build/lib/clang/18 not found!****************** CLING ******************
* Type C++ code and press enter to run it *
* Type .q to exit *
*******************************************
[cling]$ .qcling-官方编译好的
vgvassilev/cling.git
夜间编译 / 2020-Dec-17-cling-Ubuntu-16.04-x86_64-0.8.dev-c054ac2.tar.bz2
上手 : On-the-fly-C++/ ， cling-cpp-11-interpreter/
cat /etc/issue # == Ubuntu 22.04.5 LTS \n \laria2c --all-proxy=http://westgw:7890 https://github.com/vgvassilev/cling/releases/download/cling-nightlies/2020-Dec-17-cling-Ubuntu-16.04-x86_64-0.8.dev-c054ac2.tar.bz2
tar -jxf 2020-Dec-17-cling-Ubuntu-16.04-x86_64-0.8.dev-c054ac2.tar.bz2cling_D=/app5/cling-Ubuntu-16.04-x86_64-0.8~dev-c054ac2export PATH_BASE=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
export PATH=$PATH_BASE:$jdk8_d/bin:$cling_D/binwhich cling # == /app5/cling-Ubuntu-16.04-x86_64-0.8~dev-c054ac2/bin/clingcling运行报错， 估计 原因是 这cling 是基于ubuntu16编译的， 而我这是ubuntu22
ERROR in cling::CIFactory::createCI(): cannot extract standard library include paths!
Invoking:LC_ALL=C g++-5 -O3 -DNDEBUG -xc++ -E -v /dev/null 2>&1 | sed -n -e '/^.include/,${' -e '/^ \/.*++/p' -e '}'
Results was:
With exit code 0
input_line_1:1:10: fatal error: 'new' file not found
#include <new>^~~~~
Warning in cling::IncrementalParser::CheckABICompatibility():Failed to extract C++ standard library version.****************** CLING ******************
* Type C++ code and press enter to run it *
* Type .q to exit *
*******************************************
[cling]$ .q欧洲高能物理数据分析 ROOT内置的cling
改为用 高能物理数据分析 ROOT / root_v6.34.02.Linux-ubuntu22.04-x86_64-gcc11.4.tar.gz 其内置了cling
结论: rootcling bare-cling 没有交互式界面， 直接退出了
aria2c https://root.cern/download/root_v6.34.02.Linux-ubuntu22.04-x86_64-gcc11.4.tar.gztar -xf root_v6.34.02.Linux-ubuntu22.04-x86_64-gcc11.4.tar.gz#清理PATH
export PATH_BASE=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
export PATH=$PATH_BASErootD=/app5/root_v6.34.02.Linux-ubuntu22.04-x86_64-gcc11.4#激活 高能物理ROOT 环境
source $rootD/bin/thisroot.sh
#命令展开: source /app5/root_v6.34.02.Linux-ubuntu22.04-x86_64-gcc11.4/bin/thisroot.shecho $PATH #== $rootD/bin:$PATH_BASE
echo $LD_LIBRARY_PATH # == $rootD/lib
echo $ROOTSYS # == $rootD
which rootcling # == $rootD/bin/rootclingrootcling --help-list | grep bare
#bare-cling - Call directly cling and exit.rootcling bare-cling #没有交互式界面， 直接退出了
: You have an error in your SQL syntax；)
