Gcc Error Message
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…and How-to Solve The Problem1.1 Compilation Errors1.1.1 Error: …discards qualifiers1.1.2 Error: storage size of ‘foo' isn't known1.1.3 Error: multiple types in gcc error message format one declaration1.1.4 Error: invalid use of undefined type ‘struct Foo’1.1.5
Gcc Warnings
Error: no matching function for call to ‘FooClass::foo()'1.1.6 Error: undefined reference to ‘FooClass::foo()'1.1.7 Error: invalid operands
Gcc Pragma Warning
of types `const char[31]' and `const char[7]' to binary `operator+'1.1.8 Error: `QValueList' undeclared (first use this function)1.1.9 Error: cannot call member function `Foo* Foo::instance() const' without
Gcc Errors List
object1.1.10 Errors: non-pointer type, non-aggregate type, cannot convert1.1.11 Error: syntax error before `*' token1.1.12 Error: `foo' is not a type1.1.13 Error: unable to find a register to spill in class `FOO'1.1.14 Error: invalid operands to binary ‘operator<<‘1.2 Qt Peculiarities1.2.1 Using Qt - invalid use of void expression1.2.2 Using Qt - …before ‘protected’1.2.3 gcc #error Using Qt - …vtable1.3 Serious Warnings1.3.1 Warning: Control reaches the end of a non-void function1.3.2 Warning: ‘foo’ is used uninitialized in this function1.3.3 Warning: cannot pass objects of non-POD type ‘struct std::string' through ‘…' This page has been converted from a Wiki formatted article. If I've missed anything in the conversion process, please tell. Sometimes GCC emits something that can be described as Haiku poems - and you have no clue as to what it really is complaining about. This page is a collection of such gems, their meaning in English and how to solve the problem. If you run into an error that you feel belongs here, feel free to mail me. I'm using GMail as e8johan. Compilation Errors This is a list of compilation errors that you might find yourself trying to interpret in no particular order. Error: …discards qualifiers Error message: passing ‘const ClassName’ as ‘this’ argument of ‘virtual void ClassName::methodName()’
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring gcc options developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question cflags x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; gcc error unrecognized command line option it only takes a minute: Sign up Is there any way to get readable gcc error and warning output at the command line? up vote 20 down vote favorite 7 For some long errors, the gcc output is dense and http://digitalfanatics.org/resources/gcc-error-messages/ has lots of line-wrapping etc. Especially when errors are subtle, it can take me 10-30 seconds of squinting to parse it with my eyes. I've taken to pasting this in an open code-editor window to get some basic syntax highlighting and enable reformatting with regex's. Has anyone invented a more automated method? c++ c gcc gcc-warning share|improve this question asked Mar 17 '09 at 23:27 mikeh 1 I just make the window very wide... –i_am_jorf Mar 17 '09 http://stackoverflow.com/questions/656420/is-there-any-way-to-get-readable-gcc-error-and-warning-output-at-the-command-lin at 23:33 And the font very small ;) –Anonymous Mar 17 '09 at 23:35 1 and then stop using gcc. :D –Robert P Mar 17 '09 at 23:44 2 Clarification: I love intel's c++ compiler. The messages are clean, short, and pointed. Back when I still had a license, I'd test my compiles in intel's compiler before I built with GCC just to find the big problems. –Robert P Mar 17 '09 at 23:45 @Robert I'm intrigued, hope I get a chance to try that sometime. Not appropriate on the current project unfortunately... –mikeh Mar 18 '09 at 4:28 | show 1 more comment 8 Answers 8 active oldest votes up vote 14 down vote I've found colorgcc to be invaluable. By introducing coloring, it becomes much easier to mentally parse the text of gcc error messages, especially when templates are involved. share|improve this answer answered Mar 17 '09 at 23:43 Mr Fooz 39.8k35083 1 Hey, I posted that with a temp account and now I can't follow up with it, but I wanted to say thanks for this -- that is an awesome utility and just the sort I was looking for. –mikeh Mar 18 '09 at 4:24 Glad to be of service. –Mr Fooz Mar 18 '09 at 11:39 I like this, but I would prefer message simplification like gccfilter and stlfilt does, altho
source file, and ":30:" is the line number where the error was located. The "undeclared" error is a common mistake. All variables must be declared before they are used, and if you forget, you'll see this error. It means the http://users.csc.calpoly.edu/~jdalbey/101/Resources/errormessages.html compiler didn't find a declaration for a variable prior to its first use. The error can also occur if you spelled the variable name differently in two places. The compiler is "case-sensitive" so "DOG" and "dog" are two different variables; pay careful attention to upper and lower case letters. /tmp/ccJiZokm.o: In function `main': conepainting.c:(.text+0x63): undefined reference to `sqrt' collect2: ld returned 1 exit status You forgot to compile with the math library. gcc error Provide the "-lm" flag (that's the letter "l" not the numeral "1" to the compiler, like this: gcc -lm conepainting.c no newline at end of file. Be sure there is a new line with no blank spaces as the last line in the file. warning: implicit declaration of function `printf' You must have a #include