So I’m working on an exceedingly large codebase, and recently upgraded to gcc 4.3, which now triggers this warning: warning: deprecated conversion from string constant to ‘char*’ Obviously, the correct way to fix this is to find every declaration like char *s = “constant string”; or function call like: void foo(char *s); foo(“constant string”); and … Read more
I’m trying to use GCC (linux) with a makefile to compile my project. I get the following error which is can’t seem to decipher in this context: “No rule to make target ‘vertex.cpp’, needed by ‘vertex.o’. Stop.” This is the makefile: a.out: vertex.o edge.o elist.o main.o vlist.o enode.o vnode.o g++ vertex.o edge.o elist.o main.o vlist.o … Read more
When I try to install odoo-server, I got the following error: error: Setup script exited with error: command ‘x86_64-linux-gnu-gcc’ failed with exit status 1 Could anyone help me to solve this issue? 35 Answers 35 I encountered the same problem in college having installed Linux Mint for the main project of my final year, the … Read more
When building my C++ program, I’m getting the error message undefined reference to ‘vtable… What is the cause of this problem? How do I fix it? It so happens that I’m getting the error for the following code (The class in question is CGameModule.) and I cannot for the life of me understand what the … Read more
How does one do this? If I want to analyze how something is getting compiled, how would I get the emitted assembly code? 17 s 17 Use the -S option to gcc (or g++), optionally with -fverbose-asm which works well at the default -O0 to attach C names to asm operands as comments. Less well … Read more
While attempting to compile my C program, running the following command: gcc pthread.c -o pthread Returns: Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo. and my code does not compile. Why is this happening and how can I fix this problem? 1Best Answer 11 Open up Xcode, and accept … Read more
I first noticed in 2009 that GCC (at least on my projects and on my machines) have the tendency to generate noticeably faster code if I optimize for size (-Os) instead of speed (-O2 or -O3), and I have been wondering ever since why. I have managed to create (rather silly) code that shows this … Read more
I keep hearing about LLVM all the time. It’s in Perl, then it’s in Haskell, then someone uses it in some other language? What is it? What exactly distinguishes it from GCC (perspectives = safety etc.)? 7 s 7 LLVM is a library that is used to construct, optimize and produce intermediate and/or binary machine … Read more
I have read about GCC’s Options for Code Generation Conventions, but could not understand what “Generate position-independent code (PIC)” does. Please give an example to explain me what does it mean. 6 s 6 Position Independent Code means that the generated machine code is not dependent on being located at a specific address in order … Read more
Why does the order in which libraries are linked sometimes cause errors in GCC? 9 s 9 (See the history on this answer to get the more elaborate text, but I now think it’s easier for the reader to see real command lines). Common files shared by all below commands $ cat a.cpp extern int … Read more
