The article catalogs practical incompatibilities between the C standard and how GCC/Clang + glibc/musl actually behave in the real world. Key issues include compilers not being strictly conformant by default (e.g., `asm` keyword treatment), FLT_ROUNDS not dynamically reflecting runtime rounding mode changes in GCC, and unimplemented standard floating-point pragmas.
Background
GCC and Clang are the dominant C compilers in use today, but they historically prioritize practical extensions over strict C standard conformance, leading to gaps between what the ISO C standard specifies and what compilers actually implement.
- Source
- Lobsters
- Published
- Oct 13, 2026 at 01:17 AM
- Score
- 6.0 / 10