Many compiler and the related standard libraries provide tests, but they are not easy usable as portable/standalone conformance check for other compiler or for other runtime library implementations.

• A reusable license
• Only needs a Compiler and a posix shell to run the testsuite
• Portable: Works on many systems with many compiler and runtime libraries
• Check C Compiler and the C Runtime library
• Check the POSIX Runtime library
• Check C++ Compiler and the C++ Runtime library
• Create a nice Table from multiple Results

• Extract the testsuite
• configure the testsuite to test a compiler / runtime library for a given standard
• make: run the testsuite and generate a result file
• make table: generate a table for multiple results

• std: newest
• Compiler: tcc
• runtime-library: system-default

mkdir results
cd results
CC=tcc ../configure --disable-c++
make

• Now there should be an document with the results of the current test

• Current tested environments

  Target OS	tested Compiler
  Linux	tcc / gcc / g++ / owcc / clang / zig cc / zig c++
  Windows	x86_64-win32-tcc / x86_64-w64-mingw32-gcc / x86_64-w64-mingw32-g++

• Hints / Links for later use:

  • With many years delay, a command line switch arrived in MSVC 2015 Update 3 for selecting the c++ version

Currently, POSIX.1-2024 ist referenced. Older versions will follow.

• gcc Status of C99 features in GCC / C11 Status in GCC / C++ Standards support in GCC
• clang C Support in clang / C++ Support in Clang
• msvc C/C++ Support in MSVC
• dmc C++0x language Implementation
• owcc C99 Compliance / C++ Language / C++ Library / C++ Library Status
• cppreference.com What's new in C99 / C99 Implementation status / C23 Implementation status / C++ Implementation status

• ISOC SC22/WG14 C standards commitee

• ISO SC22/WG14 docs

• ISO SC22/WG14 document log

• C2y First draft was N3220

• C23 Publication status at iso.org: 60.00

  Changed	Status	Status-Text
  N/A	60.60	International Standard published
  27.Sep.2024	60.00	International Standard under publication
  27.Sep.2024	50.60	Close of voting. Proof returned by secretariat
  30.Aug.2024	50.20	Proof sent to secretariat or FDIS ballout initiated: 8 weeks
  17.Jul.2024	50.00	Final text received or FDIS registered for formal approval

• Unix standards overview

The Open Group Base Specification is also released as the Single UNIX Specification and also released as the ISO/IEC/IEEE 9945-1 standard

• Single UNIX Specification (SUSv*)

  • UNIX V7, Version 4
  • UNIX 03, Version 3
  • UNIX 98, Version 2
  • UNIX 95, Version 1

• POSIX 2024 Publication status at iso.org: 40.99 (since 19.Sep.2024)

  • ISO/IEC/IEEE 9945:2024
  • ISO/IEC/IEEE 9945:2009
  • ISO/IEC/IEEE 9945-1:2003
  • ISO/IEC/IEEE 9945-1:2002
  • ISO/IEC/IEEE 9945-1:1996
  • ISO/IEC/IEEE 9945-1:1990

• ISOCPP SC22/WG21 C++ standards commitee
• C++ standard core language issues list
• C++ standard library issues list
• C++26 First draft was N4958
• C++23 is available at the iso.org Website since 19.Oct.2024

• use 'bootstrap' to regenerate the build system files
• use 'configure' with "--enable-maintainer-mode" to rebuild all programs all tests groups are enabled by default:
  • C
  • C++ (alias names: cxx / cplusplus)
  • posix
  • libc
  • libc++ (alias name: libcxx)