gcc编译错误this statement may fall through GCC编译器会在switch语句中检查case后是否需要添加break语句,以确保代码的正确性。当没有在case中加入break语句时,会出现警告信息”this statement may fall through”。这是因为如果没有添加break语句,程序会继续执行下一个case的代码,可能导致意想不到的结果。 解决这个问...
When building the 2.2.2 version with GCC 8.3.0, it throws an error as seen in the screenshot below. The only non-patch solution for this was to add-Wno-implicit-fallthroughto the CFLAGS which is less than ideal.
In file included from prog.cc:9:0: ArduinoJson.h: In function 'T ArduinoJson::Polyfills::parseInteger(const char*) [with T = long int]': ArduinoJson.h:3164:7: warning: this statement may fall through [-Wimplicit-fallthrough=] negative_result = true; ^~~~ ArduinoJson.h:3165:5: ...
g++ -DNDEBUG -g2 -O3 -std=c++17 -Wall -Wextra -fPIC -c authenc.cpp asn.cpp: In member function ‘void EncodedObjectFilter::Put(const byte*, size_t)’: asn.cpp:359:18: warning: this statement may fall through [-Wimplicit-fallthrough=] m_state = BODY; // fall through ^ asn.cp...
If you remove the [[fallthrough]];, GCC warns: main.cpp: In function ‘int main()’: main.cpp:5:15: warning: this statement may fall through [-Wimplicit-fallthrough=] argc = 1; ~~^~~ main.cpp:6:9: note: here case 1: ^~~~ Also note from the example that the ...
(const char**)': gengtype-lex.c:356:15: warning: this statement may fall through [-Wimplicit-fallthrough=] /home/rguenther/src/releases/gcc-11.2.0/gcc-11.2.0/gcc/gengtype-lex.l:119:1: note: in expansion of macro 'YY_DO_BEFORE_ACTION' /tmp/gcc-20220416-660-1fhl121/gcc-11.2.0/...
-Wmultistatement-macros 警告不安全的多语句宏,这些宏看起来像if , else , for , switch或while这样的子句可以保护,其中只有第一条语句在扩展宏后才实际被保护。 例如: #define DOIT x++; y++ if (c) DOIT; 1 2 3 将无条件地增加y ,而不仅仅是当c成立时。 通常可以通过将宏包装在do-while循环中来...
However, I have one switch statement where I want to allow fall throughs from all case-statements. Is there a way to do an explicit fall through? I'd prefer to avoid having to compile with Wno-implicit-fallthrough for this file. EDIT: I'm looking for a way to make the fall through...
gengtype-lex.c:365:15: warning: this statement may fall through [-Wimplicit-fallthrough=] /d/gcc-8.4.0/gcc-8.4.0/gcc/gengtype-lex.l:118:1: note: in expansion of macro âYY_DO_BEFORE_ACTIONâ /d/gcc-8.4.0/gcc-8.4.0/gcc/gengtype-lex.l:113:1: note: here ...
如果:make出错:src/core/ngx_murmurhash.c:37:11: error: this statement may fall through [-Werror=implicit-fallthrough=] h ^= data[2] << 16; ~~^~~~解决办法:进入到/root/nginpage/nginx-1.10.1/objs/目录下(解压的目录)打开编辑文件Makefile,找到有一下内容的这行:CFLAGS = -pipe -O -W -...