How to wrap a C compiler and preprocessor, really
The article explores creating a wrapper for C compilers GCC and Clang, proposing a "back-room" approach to simplify modifications during compilation using existing compiler options and addressing integration challenges.
Read original article
The article discusses the challenges and methodologies involved in creating a wrapper for C compilers, specifically focusing on GCC and Clang. The author aims to develop a drop-in replacement for the compiler that allows for modifications during the compilation process without needing to reimplement the compiler's driver. The proposed solution involves a "back-room" approach, which simplifies the process by utilizing existing compiler options like `-wrapper` and `-###` to manage subcommands generated during compilation. This method avoids the complexities of parsing command-line arguments and instead relies on the compiler's built-in functionalities to handle subcommands. The author also addresses the integration of preprocessing and compilation stages in modern compilers, noting that while GCC allows separation with the `-no-integrated-cpp` option, Clang does not support this directly but can be manipulated to achieve similar results. The article highlights the importance of understanding the command-line syntax and semantics of compilers to effectively implement such wrappers.
- The article focuses on creating a wrapper for C compilers like GCC and Clang.
- A "back-room" approach is proposed to simplify the process of modifying compiler behavior.
- The use of compiler options like `-wrapper` and `-###` is emphasized for managing subcommands.
- Challenges related to the integration of preprocessing and compilation stages are discussed.
- The author notes differences in handling these stages between GCC and Clang.
Related
Driving Compilers
The article outlines the author's journey learning C and C++, focusing on the compilation process often overlooked in programming literature. It introduces a series to clarify executable creation in a Linux environment.
Better Firmware with LLVM/Clang
LLVM and Clang are gaining traction in embedded software development, particularly for ARM Cortex-M devices. The article advocates integrating Clang for better static analysis, error detection, and dual compiler usage.
Clang vs. Clang
The blog post critiques compiler optimizations in Clang, arguing they often introduce bugs and security vulnerabilities, diminish performance gains, and create timing channels, urging a reevaluation of current practices.
Optimisation-dependent IR decisions in Clang
Clang's Intermediate Representation varies with optimization levels; disabling optimization adds debugging aids, while enabling it introduces performance enhancements like lifetime markers and TBAA metadata, impacting compiler usage and performance tuning.
Notes/Primer on Clang Compiler Front End (1): Introduction and Architecture
The article discusses the Clang Compiler Frontend, emphasizing its architecture, development environment setup, and the compilation process involving Lexer, Parser, and Code Generator, particularly for C++ complexities.
2 comments[1] https://github.com/fuhsnn/widcc?tab=readme-ov-file#building-...
Related
Driving Compilers
The article outlines the author's journey learning C and C++, focusing on the compilation process often overlooked in programming literature. It introduces a series to clarify executable creation in a Linux environment.
Better Firmware with LLVM/Clang
LLVM and Clang are gaining traction in embedded software development, particularly for ARM Cortex-M devices. The article advocates integrating Clang for better static analysis, error detection, and dual compiler usage.
Clang vs. Clang
The blog post critiques compiler optimizations in Clang, arguing they often introduce bugs and security vulnerabilities, diminish performance gains, and create timing channels, urging a reevaluation of current practices.
Optimisation-dependent IR decisions in Clang
Clang's Intermediate Representation varies with optimization levels; disabling optimization adds debugging aids, while enabling it introduces performance enhancements like lifetime markers and TBAA metadata, impacting compiler usage and performance tuning.
Notes/Primer on Clang Compiler Front End (1): Introduction and Architecture
The article discusses the Clang Compiler Frontend, emphasizing its architecture, development environment setup, and the compilation process involving Lexer, Parser, and Code Generator, particularly for C++ complexities.