Gdb c compiler

When I use gcc to compile C programs I usually use -g to get some debug information into the elf file so that gdb can help me if needed. However, I noticed that some programs use -ggdb, since it's supposed to make the debug info more gdb friendly. How do they differ and which is recommended to use? Note: A link to the options for Debugging Your Program or GCC, -g and -ggdb are similar with some slight differences, I read this -g produces debugging information in the OS¹s native format (stabs, COFF, XCOFF, or DWARF 2). -ggdb produces debugging information specifically intended for gdb. -ggdb3 produces extra debugging information, for example: including macro definitions. -ggdb by itself without specifying the level defaults to -ggdb2 (i.e., gdb for level 2). I have atleast one example where -ggdb worked better for me than another debug option which we were using : amitkar@lohgad:~> cat > main.c #include int main(int argc, char **argv) amitkar@lohgad:~> gcc -gstabs+ main.c -o main amitkar@lohgad:~> file main main: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.4, dynamically linked (uses shared libs), not stripped amitkar@lohgad:~> /usr/bin/gdb ./main GNU gdb 6.6.50.20070726-cvs Copyright (C) 2007 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warr...

I have run in an issue with compiling gdb from configure: error: *** A compiler with support for C++11 language features is required. make[1]: *** [configure-gdb] Error 1 My operating system is Red Hat 7.6 (Maipo) but i have a compiled from source gcc(that i set as the default one with an alias in bashrc) gcc --version gcc (GCC) 8.2.0 Copyright (C) 2018 Free Software Foundation, Inc. which gcc alias gcc='/usr/local/gcc8.2/bin/gcc' /usr/local/gcc8.2/bin/gcc which g++ alias g++='/usr/local/gcc8.2/bin/g++' /usr/local/gcc8.2/bin/g++ What i have tried/read so far • Read the • Read the README file in the gdb folder/subfolders • Tried setting the following env options CXX_FOR_TARGET=/usr/local/gcc8.2/bin/g++ GCC_FOR_TARGET=/usr/local/gcc8.2/bin/gcc (not sure if i should replace target with my actual target architecture) • Looked in the gdb-8.2.1 folder at the file config.log and found these: ac_cv_env_GCC_FOR_TARGET_value=/usr/local/gcc8.2/bin/gcc ac_cv_prog_CXX_FOR_TARGET=/usr/local/gcc8.2/bin/g++ ac_cv_prog_GCC_FOR_TARGET=/usr/local/gcc8.2/bin/gcc However in the C compiler section of the same config log I have found the following: configure:4284: checking for C compiler version configure:4293: gcc --version >&5 gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36) Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. I am not sure ifi can use t...

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Topics Edit Using C++ and WSL in VS Code In this tutorial, you will configure Visual Studio Code to use the GCC C++ compiler (g++) and GDB debugger on Ubuntu in the Note: Much of this tutorial is applicable to working with C++ and VS Code directly on a Linux machine. Visual Studio Code has support for working directly in WSL with the After completing this tutorial, you will be ready to create and configure your own C++ project, and to explore the VS Code documentation for further information about its many features. This tutorial does not teach you about GCC or Linux or the C++ language. For those subjects, there are many good resources available on the Web. If you have any problems, feel free to file an issue for this tutorial in the Prerequisites To successfully complete this tutorial, you must do the following steps: • Install • Install the • Install Set up your Linux environment • Open the Bash shell for WSL. If you installed an Ubuntu distro, type "Ubuntu" in the Windows search box and then click on it in the result list. For Debian, type "Debian", and so on. The shell appears ...

When compiling C source code with either gcc or Clang, I always use the -g flag to generate debugging information for gdb. gcc -g -o helloworld helloworld.c I noticed that some people recommend -g3 instead. What is the difference between the -g and -g3 flags? Also is there a difference between -g and -ggdb? From the -g Produce debugging information in the operating system's native format (stabs, COFF, XCOFF, or DWARF 2). GDB can work with this debugging information. On most systems that use stabs format, -g enables use of extra debugging information that only GDB can use; this extra information makes debugging work better in GDB but probably makes other debuggers crash or refuse to read the program. If you want to control for certain whether to generate the extra information, use -gstabs+, -gstabs, -gxcoff+, -gxcoff, or -gvms (see below). ... -ggdb Produce debugging information for use by GDB. This means to use the most expressive format available (DWARF 2, stabs, or the native format if neither of those are supported), including GDB extensions if at all possible. -gvmslevel Request debugging information and also use level to specify how much information. The default level is 2. Level 0 produces no debug information at all. Thus, -g0 negates -g. .... Level 3 includes extra information, such as all the macro definitions present in the program. Some debuggers support macro expansion when you use -g3. tl;dr: To answer your specific question, -g3 "includes extra information su...

When I use gcc to compile C programs I usually use -g to get some debug information into the elf file so that gdb can help me if needed. However, I noticed that some programs use -ggdb, since it's supposed to make the debug info more gdb friendly. How do they differ and which is recommended to use? Note: A link to the options for Debugging Your Program or GCC, -g and -ggdb are similar with some slight differences, I read this -g produces debugging information in the OS¹s native format (stabs, COFF, XCOFF, or DWARF 2). -ggdb produces debugging information specifically intended for gdb. -ggdb3 produces extra debugging information, for example: including macro definitions. -ggdb by itself without specifying the level defaults to -ggdb2 (i.e., gdb for level 2). I have atleast one example where -ggdb worked better for me than another debug option which we were using : amitkar@lohgad:~> cat > main.c #include int main(int argc, char **argv) amitkar@lohgad:~> gcc -gstabs+ main.c -o main amitkar@lohgad:~> file main main: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.4, dynamically linked (uses shared libs), not stripped amitkar@lohgad:~> /usr/bin/gdb ./main GNU gdb 6.6.50.20070726-cvs Copyright (C) 2007 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warr...

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When compiling C source code with either gcc or Clang, I always use the -g flag to generate debugging information for gdb. gcc -g -o helloworld helloworld.c I noticed that some people recommend -g3 instead. What is the difference between the -g and -g3 flags? Also is there a difference between -g and -ggdb? From the -g Produce debugging information in the operating system's native format (stabs, COFF, XCOFF, or DWARF 2). GDB can work with this debugging information. On most systems that use stabs format, -g enables use of extra debugging information that only GDB can use; this extra information makes debugging work better in GDB but probably makes other debuggers crash or refuse to read the program. If you want to control for certain whether to generate the extra information, use -gstabs+, -gstabs, -gxcoff+, -gxcoff, or -gvms (see below). ... -ggdb Produce debugging information for use by GDB. This means to use the most expressive format available (DWARF 2, stabs, or the native format if neither of those are supported), including GDB extensions if at all possible. -gvmslevel Request debugging information and also use level to specify how much information. The default level is 2. Level 0 produces no debug information at all. Thus, -g0 negates -g. .... Level 3 includes extra information, such as all the macro definitions present in the program. Some debuggers support macro expansion when you use -g3. tl;dr: To answer your specific question, -g3 "includes extra information su...

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Topics Edit Using C++ and WSL in VS Code In this tutorial, you will configure Visual Studio Code to use the GCC C++ compiler (g++) and GDB debugger on Ubuntu in the Note: Much of this tutorial is applicable to working with C++ and VS Code directly on a Linux machine. Visual Studio Code has support for working directly in WSL with the After completing this tutorial, you will be ready to create and configure your own C++ project, and to explore the VS Code documentation for further information about its many features. This tutorial does not teach you about GCC or Linux or the C++ language. For those subjects, there are many good resources available on the Web. If you have any problems, feel free to file an issue for this tutorial in the Prerequisites To successfully complete this tutorial, you must do the following steps: • Install • Install the • Install Set up your Linux environment • Open the Bash shell for WSL. If you installed an Ubuntu distro, type "Ubuntu" in the Windows search box and then click on it in the result list. For Debian, type "Debian", and so on. The shell appears ...

I have run in an issue with compiling gdb from configure: error: *** A compiler with support for C++11 language features is required. make[1]: *** [configure-gdb] Error 1 My operating system is Red Hat 7.6 (Maipo) but i have a compiled from source gcc(that i set as the default one with an alias in bashrc) gcc --version gcc (GCC) 8.2.0 Copyright (C) 2018 Free Software Foundation, Inc. which gcc alias gcc='/usr/local/gcc8.2/bin/gcc' /usr/local/gcc8.2/bin/gcc which g++ alias g++='/usr/local/gcc8.2/bin/g++' /usr/local/gcc8.2/bin/g++ What i have tried/read so far • Read the • Read the README file in the gdb folder/subfolders • Tried setting the following env options CXX_FOR_TARGET=/usr/local/gcc8.2/bin/g++ GCC_FOR_TARGET=/usr/local/gcc8.2/bin/gcc (not sure if i should replace target with my actual target architecture) • Looked in the gdb-8.2.1 folder at the file config.log and found these: ac_cv_env_GCC_FOR_TARGET_value=/usr/local/gcc8.2/bin/gcc ac_cv_prog_CXX_FOR_TARGET=/usr/local/gcc8.2/bin/g++ ac_cv_prog_GCC_FOR_TARGET=/usr/local/gcc8.2/bin/gcc However in the C compiler section of the same config log I have found the following: configure:4284: checking for C compiler version configure:4293: gcc --version >&5 gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36) Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. I am not sure ifi can use t...

When compiling C source code with either gcc or Clang, I always use the -g flag to generate debugging information for gdb. gcc -g -o helloworld helloworld.c I noticed that some people recommend -g3 instead. What is the difference between the -g and -g3 flags? Also is there a difference between -g and -ggdb? From the -g Produce debugging information in the operating system's native format (stabs, COFF, XCOFF, or DWARF 2). GDB can work with this debugging information. On most systems that use stabs format, -g enables use of extra debugging information that only GDB can use; this extra information makes debugging work better in GDB but probably makes other debuggers crash or refuse to read the program. If you want to control for certain whether to generate the extra information, use -gstabs+, -gstabs, -gxcoff+, -gxcoff, or -gvms (see below). ... -ggdb Produce debugging information for use by GDB. This means to use the most expressive format available (DWARF 2, stabs, or the native format if neither of those are supported), including GDB extensions if at all possible. -gvmslevel Request debugging information and also use level to specify how much information. The default level is 2. Level 0 produces no debug information at all. Thus, -g0 negates -g. .... Level 3 includes extra information, such as all the macro definitions present in the program. Some debuggers support macro expansion when you use -g3. tl;dr: To answer your specific question, -g3 "includes extra information su...