从宏观角度讲编译器有以下几个可分离出来的单独程序,包括:预处理器(preprocessor)、编译器(compiler,又分为两个部分:前端,进行语法和语义解析,生成一抽象语法树;后端,进行代码生成和相关的代码优化)、汇编器(assembler)、链接器(linker) 假设源程序文件名为hello.c,图1是gcc编译器运行hello.c源程序的执行过程: 下...
list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_variable_templates result) if(result EQUAL -1) message(FATAL_ERROR "I really need variable templates.") endif() 正如您可能猜到的,为每个使用特性编写一个测试文件是一项艰巨的任务。即使是 CMake 的作者也建议只检查某些高级元特性是否存在:cxx_std_98、cxx_st...
If Statement - If语句 Switch Statement - Switch语句 Break Statement - Break语句 Continue Statement - Continue语句 Goto Statement - Goto语句 Function call - 函数调用 Return Statement - 返回语句 Macro - 宏 Preprocessor directive - 预处理指令 Header file - 头文件 Integer - 整数 Floating point number...
Jump if not equal [jg address] Jump if greater [jge address] Jump if equal or greater [jl address] Jump if lesser [jle address] Jump if lesser or equal VIII. Input / Output [prn arg] Print an integer
+- 1: preprocessor, {0}, objective-c-cpp-output +- 2: compiler, {1}, ir +- 3: backend, {2}, assembler +- 4: assembler, {3}, object +- 5: linker, {4}, image 6: bind-arch,"x86_64", {5}, image 接下来,基于这个例子,我们使用终端逐步编译,生成我们的可执行文件,并最终控制台...
C语言基础,使用预处理器:#define可以在程序中定义一个常量,它在编译时会被替换为其对应的值。使用**const**关键字:const关键字用于
Preprocessor Options -Aquestion=answer -A-question[=answer] -C -CC -Dmacro[=defn] -dD -dI -dM -dN -dU -fdebug-cpp -fdirectives-only -fdollars-in-identifiers -fexec-charset=charset -fextended-identifiers -finput-charset=charset -fno-canonical-system-headers -fpch-deps -fpch-preprocess -...
Includes the preprocessor line numbering information. See also the–P option. B.2.11 -errfmt[=[no%]error] Use this option if you want to prefix the string “error:” to the beginning of error messages so they are more easily distinguishable from warning messages. The prefix is also ...
The tests can use some preprocessor macros to validate the test conditions. They can be used multiple times, and if any of those conditions fails, the particular test is considered to fail. TEST_CHECKis the most commonly used testing macro which simply tests a boolean condition and fails if ...
Cause: The precompiler was not able to open a header file specified using the #INCLUDE preprocessor directive or the EXEC SQL INCLUDE statement. This can happen if the file specification is inaccurate or if read permission or read-access rights on the file or on one or more of the directori...