Changes since 2.2.3:

• When no data is used in $(call echo,>file) command, restore the behavior of creating an empty file (not a file with one newline) during the shell execution phase (not command expansion phase).

Changes since 2.2.2:

• Fix a bug where linking failed for targets in subdirectories because of a forgotten mangling of the name of file containing the objects being linked.

Changes since 2.2.1:

• Add initial support for C++20.

Changes since 2.2.0:

• On macOS, use libtool -static to create static libraries.

Changes since 2.1.0:

• Add treat_warnings_as_no_errors option.
• Allow linking projects with large number of object files by generating the list of required objects to a file and passing @file to the compiler.
• Use jobserver integration of GCC when using LTO in release mode.

Changes since 2.0.1:

• Add default_warnings and disable_all_warnings.
• Stop using t2t_docsys. The manual is now directly in Markdown.
• Store the changes in CHANGES.md using Markdown formatting.

Changes since 2.0.0:

• For C++17 on macos-64, require at least 10.15 instead of 10.14, because std::filesystem is available only since 10.15.

• Add C++14 and C++17 support via CPP_STANDARD variable.
• Make PLATFORM a triple system-compiler-architecture and remove the BITS variable. If no architecture is specified, the system architecture is used automatically.
• Change the default Windows compiler to Visual C++.
• Rename OS X to macOS.
• Add script for creating universal macOS binaries recursively.

• Upgrade TDM-GCC to 9.2.
• Upgrade Visual Studio C++ to 2019.
• Upgrade OS X support to include ARM64 and drop i386.

• Do not use debug mode of libstdc++.
• Remove the U_FORTIFY_SOURCE option.
• Add treat_warnings_as_errors flag.
• Increase target OS X version to 10.9.

• Fix all corner cases in builtem_mangle and builtem_demangle.