This document is a WORK IN PROGRESS.
This is just a quick personal cheat sheet: treat its contents with caution!

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C C++

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Table of contents

• GCC
• Clang
• gcovr

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GCC

Reference(s)

• https://hackingcpp.com/cpp/cheat_sheets.html
• https://hackingcpp.com/index.html
• https://hackingcpp.com/cpp/community.html
• https://www.youtube.com/watch?v=AMkAKlDI_Gw
• https://learnxinyminutes.com/docs/c++/
• https://stroustrup.com/4th.html
• https://stroustrup.com/Tour.html
• https://gcc.gnu.org/onlinedocs/
• https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/
• https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/Invoking-GCC.html#Invoking-GCC
• https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/C-Dialect-Options.html#C-Dialect-Options
• https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/C_002b_002b-Dialect-Options.html#C_002b_002b-Dialect-Options
• https://www.rapidtables.com/code/linux/gcc.html

When using GNU make With GCC (maybe also with Clang?), some flags can be passed, e.g.:

$ make clean && make CXXFLAGS="-fpermissive -fPIC"

E.g. some useful options:

• See -fpermissive: https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/C_002b_002b-Dialect-Options.html#index-fpermissive
• See -fPIC: https://wiki.gentoo.org/wiki/Project:AMD64/Fixing_-fPIC_Errors_Guide
• See -Wall: https://www.rapidtables.com/code/linux/gcc/gcc-wall.html
• See -Wextra: https://www.rapidtables.com/code/linux/gcc.html
• See -O: https://www.rapidtables.com/code/linux/gcc/gcc-o.html#optimization

Also, different compiling standards (-std=) can be used, e.g.:

• $ make clean && make CFLAGS="-std=gnu90 -fPIC" CXXFLAGS="-std=c++14 -fpermissive -fPIC"

Here are the available standards:

• c++98 or c++03 for ISO C++ 1998 with amendments standard
• gnu++98 or gnu++03 for ISO C++ 1998 with amendments and GNU extensions standard
• c++11 for ISO C++ 2011 with amendments standard
• gnu++11 for ISO C++ 2011 with amendments and GNU extensions standard
• c++14 for ISO C++ 2014 with amendments standard
• gnu++14 for ISO C++ 2014 with amendments and GNU extensions standard
• c++17 for ISO C++ 2017 with amendments standard
• gnu++17 for ISO C++ 2017 with amendments and GNU extensions standard
• c++20 for ISO C++ 2020 DIS standard
• gnu++20 for ISO C++ 2020 DIS with GNU extensions standard
• c89, c90, or iso9899:1990 for ISO C 1990 standard
• iso9899:199409 for ISO C 1990 with amendment 1 standard
• gnu89 or gnu90 for ISO C 1990 with GNU extensions standard
• c99 or iso9899:1999 for ISO C 1999 standard
• gnu99 for ISO C 1999 with GNU extensions standard
• c11 or iso9899:2011 for ISO C 2011 standard
• gnu11 for ISO C 2011 with GNU extensions standard
• c17, iso9899:2017, c18, or iso9899:2018 for ISO C 2017 standard
• gnu17 or gnu18 for ISO C 2017 with GNU extensions standard
• c2x for Working Draft for ISO C2x standard
• gnu2x for Working Draft for ISO C2x with GNU extensions standard

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Clang

Clang is a "LLVM native" C/C++/Objective-C compiler using LLVM as a back end and optimizer. It aims to be GCC compatible yet stricter, offers fast compile times with low memory usage, and has useful error and warning messages for easier compile troubleshooting.

Reference(s)

• https://wiki.gentoo.org/wiki/Clang
• https://wiki.archlinux.org/index.php/Clang

TODO

make CC=/usr/bin/clang CXX=/usr/bin/clang++ cmake . -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DCMAKE_CC_COMPILER=/usr/bin/clang

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gcovr

Code coverage:

• https://gcovr.com/en/stable/guide.html
• https://stackoverflow.com/questions/37957583/how-to-use-gcov-with-cmake
• https://jhbell.com/using-cmake-and-gcov
• ? $ make clean && make CFLAGS="-fprofile-arcs -ftest-coverage -fPIC -O0" with GCC only

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