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    • 编译log4cxx出错
    Apps Section 618 views · 6 replies ·
    Tofloor
    poster avatar
    lisisong
    deepin
    2017-11-01 23:45
    Author


    提示转换出错，但是看代码并没有错误，gcc的问题？
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    134******40
    deepin
    2017-11-02 09:16
    #1
    本帖最后由 jdocker 于 2017-11-2 01:50 编辑

    大概意思是诸如超过大小超过0x7B的东西不是有符号char型。如果用有符号char型数组，那么就需要强制类型转换,例如0x7C超过了0x7B，那么就需要强制类型转换。
    你可以在前面加上强制类型转换。如 (char)0x7C ，其他依次类推。因为新的gcc对这种错误会报错。后续碰到这种错误，就按照定义的数组类型进行转换。如果是charlog类型，可别用(char) 0x7C 强制类型转换，而是用(charlog)转换。
    这个库还有几个文件的头文件导入有点问题（以官网下载的0.1.0源码为例，github得来的不要尝试，那基本上不能成功）。
    1. src/main/cpp/inputstreamreader.cpp 添加#include   
    2. src/main/cpp/socketoutputstream.cpp 添加#include   
    3. src/examples/cpp/console.cpp 添加#include
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    134******40
    deepin
    2017-11-02 09:38
    #2
    本帖最后由 jdocker 于 2017-11-2 02:00 编辑

    还有官方仓库已经集成了liblog4cxx-dev了，你可以直接安装
    1. sudo apt install liblog4cxx-dev
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    134******40
    deepin
    2017-11-02 10:41
    #3
    提供一个可编译通过的版本，按照错误提示调整过的版本：
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    134******40
    deepin
    2017-11-02 17:56
    #4
    如果使用这个版本，你在deepin系统下需要先安装好这些（官方说明有点问题，安装有点异常）：
    1. sudo apt install libapr1-dev libaprutil1-dev doxygen
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    然后使用已经修正过得版本或者你自己按照错误修改的版本（推荐你自己修改，这样你可以知道为什么错）。
    然后
    1. #配置
    2. ./configure
    3. #编译
    4. make -j4
    5. #安装
    6. sudo make install
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    loword
    deepin
    2021-10-27 07:01
    #5 
            char prolog[] = {
         0x72, 0x00, 0x21, 0x6F, 0x72, 0x67, 0x2E, 
         0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2E, 0x6C, 
         0x6F, 0x67, 0x34, 0x6A, 0x2E, 0x73, 0x70, 0x69, 
         0x2E, 0x4C, 0x6F, 0x63, 0x61, 0x74, 0x69, 0x6F, 
         0x6E, 0x49, 0x6E, 0x66, 0x6F, (char)0xED, (char)0x99, (char)0xBB, 
         (char)0xE1, 0x4A, (char)0x91, (char)0xA5, (char)0x7C, 0x02, 0x00, 0x01, 
         0x4C, 0x00, 0x08, 0x66, 0x75, 0x6C, 0x6C, 0x49, 
         0x6E, 0x66, 0x6F, 
            0x74, 0x00, 0x12, 0x4C, 0x6A, 
                0x61, 0x76, 0x61, 0x2F, 0x6C, 0x61, 0x6E, 0x67, 
                0x2F, 0x53, 0x74, 0x72, 0x69, 0x6E, 0x67, 0x3B,
         0x78, 0x70 };
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    loword
    deepin
    2021-10-27 07:11
    #6

    loggingevent.cpp: In static member function 'static void log4cxx::spi::LoggingEvent::writeProlog(log4cxx::helpers::ObjectOutputStream&, log4cxx::helpers::Pool&)':
    loggingevent.cpp:292:26: error: narrowing conversion of '243' from 'int' to 'char' inside { } [-Wnarrowing]
             0x3B, 0x78, 0x70 };
                              ^
    loggingevent.cpp:292:26: error: narrowing conversion of '242' from 'int' to 'char' inside { } [-Wnarrowing]
    loggingevent.cpp:292:26: error: narrowing conversion of '185' from 'int' to 'char' inside { } [-Wnarrowing]
    loggingevent.cpp:292:26: error: narrowing conversion of '181' from 'int' to 'char' inside { } [-Wnarrowing]

         char classDesc[] = {
        0x72, 0x00, 0x21, 
        0x6F, 0x72, 0x67, 0x2E, 0x61, 0x70, 0x61, 0x63, 
        0x68, 0x65, 0x2E, 0x6C, 0x6F, 0x67, 0x34, 0x6A, 
        0x2E, 0x73, 0x70, 0x69, 0x2E, 0x4C, 0x6F, 0x67, 
        0x67, 0x69, 0x6E, 0x67, 0x45, 0x76, 0x65, 0x6E, 
        0x74, (char)0xF3, (char)0xF2, (char)0xB9, 0x23, 0x74, 0x0B, (char)0xB5,
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