EDK II (mirror) https://git.radix-linux.su/Tianocore/edk2.git/atom?h=master 2026-02-23T21:01:28+00:00 2026-02-23T21:01:28+00:00 Michael Kubacki michael.kubacki@microsoft.com 2026-02-03T19:26:33+00:00 urn:sha1:8472271daeed6ebb23b6992155b65c029aa42984 Replace traditional `#ifndef`/`#define`/`#endif` include guards with `#pragma` once. `#pragma once` is a widely supported preprocessor directive that prevents header files from being included multiple times. It is supported by all toolchains used to build edk2: GCC, Clang/LLVM, and MSVC. Compared to macro-based include guards, `#pragma once`: - Eliminates the risk of macro name collisions or copy/paste errors where two headers inadvertently use the same guard macro. - Eliminate inconsistency in the way include guard macros are named (e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.). - Reduces boilerplate (three lines replaced by one). - Avoids polluting the macro namespace with guard symbols. - Can improve build times as the preprocessor can skip re-opening the file entirely, rather than re-reading it to find the matching `#endif` ("multiple-include optimization"). - Note that some compilers may already optimize traditional include guards, by recognzining the idiomatic pattern. This change is made acknowledging that overall portability of the code will technically be reduced, as `#pragma once` is not part of the C/C++ standards. However, this is considered acceptable given: 1. edk2 already defines a subset of supported compilers in BaseTools/Conf/tools_def.template, all of which have supported `#pragma once` for over two decades. 2. There have been concerns raised to the project about inconsistent include guard naming and potential macro collisions. Approximate compiler support dates: - MSVC: Supported since Visual C++ 4.2 (1996) - GCC: Supported since 3.4 (2004) (http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html) - Clang (LLVM based): Since initial release in 2007 Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> 2021-12-07T17:24:28+00:00 Michael Kubacki michael.kubacki@microsoft.com 2021-12-05T22:54:13+00:00 urn:sha1:47d20b54f9a65b08aa602a1866c1b59a69088dfc REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the ShellPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Ray Ni <ray.ni@intel.com> 2020-06-30T01:39:50+00:00 Tomas Pilar Tomas.Pilar@arm.com 2020-06-19T11:59:54+00:00 urn:sha1:e18ac66d84e68387dbbe4fd8761b8f3a889534a9 A new file and header (AcpiViewConfig.[ch]) is created that houses the user configuration. This declutters the core code and improves modularity of the design. The module level symbols for verbosity, table selection, and highlighting are refactored into the new file. Cc: Ray Ni <ray.ni@intel.com> Cc: Zhichao Gao <zhichao.gao@intel.com> Reviewed-by: Zhichao Gao <zhichao.gao@intel.com> Signed-off-by: Tomas Pilar <tomas.pilar@arm.com>