-Wcast-function-type -Wclobbered -Wdangling-reference (C++ only) -Wdeprecated-copy (C++ and Objective-C++ only) -Wempty-body -Wenum-conversion (only for C/ObjC) -Wexpansion-to-defined -Wignored-qualifiers (only for C/C++) -Wimplicit-fallthrough=3 -Wmaybe-uninitialized -Wmissing-field-in...
gcc -Wimplicit -c test_implicit.c test_implicit.c:7: warning: return type defaults to `int’ test_implicit.c: In function `test’: test_implicit.c:18: warning: implicit declaration of function `sub’ [-Wmissing-braces] 当聚合类型或者数组变量的初始化表达式没有’充分’用括号{}括起时,给...
-Wimplicit (C and Objective-C only) 与-Wimplicit-int和-Wimplicit-function-declaration相同 。 此警告由-Wall启用。 -Wimplicit-fallthrough -Wimplicit- fallthrough与-Wimplicit- fallthrough = 3相同 , -Wno-implicit-fallthrough与-Wimplicit- fallthrough = 0相同 。 -Wimplicit-fallthrough= n 当开关...
-Wimplicit 对隐式函数声明给出警告 -Wimplicit-function-declaration 对隐式函数声明给出警告 -Wimplicit-int 当声明未指定类型时给出警告 -Wimplicit-interface 对带有隐式接口的调用给出警告 -Wimplicit-procedure 对没有隐式声明的过程调用给出警告 -Winit-self 对初始化为自身的变量给出警告。 -Winline 当内...
-Wempty-body 当 if 或 else 语句体为空时给出警告 -Wendif-labels 当#elif 和 #endif后面跟有其他标识符时给出警告 -Wenum-compare 对不同枚举类型之间的比较给出警告 -Werror-implicit-function-declaration 不建议使用此开关;请改用 -Werror=implicit-function-declaration ...
warning: implicit declaration of function ‘abs’ [-Wimplicit-function-declaration] 1. Code:码: #include <stdio.h> #include <math.h> int main (void) { printf ("%d\n", abs (-1)); return 0; } 1. 2. 3. 4. 5. 6. 7.
test_format.c: In function `main': test_format.c:10: warning: int format, long int arg (arg 2) test_format.c:11: warning: int format, double arg (arg 2) 输出: 1 1078711746 [-Wimplicit] 该警告选项实际上是-Wimplicit-int和-Wimplicit-function-declaration两个警告选项的集合。前者在声明...
-Warray-bounds=1 (only with -O2) -Wc++11-compat -Wc++14-compat -Wchar-subscripts -Wenum-compare (in C/ObjC; this is on by default in C++) -Wimplicit-int (C and ObjecTIve-C only) -Wimplicit-funcTIon-declaraTIon (C and ObjecTIve-C only) ...
[-Wimplicit] 该警告选项实际上是-Wimplicit-int和-Wimplicit-function-declaration两个警告选项的集合。前者在声明函数却未指明函数返回类型时给出警告,后者则是在函数声明前调用该函数时给出警告。 e.g. /* * test_implicit.c */ #include add(int a, int b) { //函数没有声明返回类型 ...
-Wimplicit 同-Wimplicit-int 和-Wimplicit-function-declaration. -Wmain 如果把 main 函数声明或定义成奇怪的类型,编译器就发出警告.典 型情况下,这个函数用于外部连接, 返回 int 数值,不需要参数,或指定两 个参数. -Wreturn-type 如果函数定义了返回类型,而默认类型是 int 型,编译器就发出警告. 同时警告...