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https://github.com/tianocore/edk2
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c0ef2b0178
Adds support for building the C language BaseTools for Windows using toolchains based on mingw-w64. Mingw-w64 is a collection of header files, libraries, and tools that when combined with a compiler enable development of Windows software. Mingw-w64 is a fork of the original MinGW (Minimalist GNU for Windows). Most active development on MinGW has ceased and mingw-w64 is now the actively maintained successor. Mingw-w64 provides a libc implementation built on top of Microsoft's UCRT (Universal C Runtime) with all nessesary compiler bindings needed to support the C++11 feature set. Modern mingw-w64 development appears to have coalesced around MSYS2, which produces a distributions of both GCC and LLVM/Clang that use mingw-w64 to target the Windows OS. This MSYS2 Clang distribution has a UNIX-like directory layout and includes Windows binaries of GNU Make. Combined with the open source licensing, MSYS2's Clang distribution is a highly attractive choice as an alternative Windows SDK for open source projects such as TianoCore. If one wishes to use EDK II to build UEFI firmware on the Windows platform, then the C BaseTools need to be compiled as Windows applications. This includes the PcdValueInit.exe program, which needs to be recompiled every time a firmware build is run in order to regenerate the initial values for structured PCDs. Currently, BaseTools only supports the Visual C++ toolchain on the Windows platform. The following new features have been added to enable usage of the toolchains derived from mingw-w64: - Fixes to the BaseTools C source code to support the use of a GCC-style compiler on the Windows OS. - The GNU Make-style Makefiles for the C BaseTools have been modified to support Windows. Both GCC + mingw-w64 and Clang + mingw-w64 have been tested and confirmed to build a working BaseTools. - BaseTools now supports generating GNU Make-style Makefiles on the Windows platform for the purpose of building firmware. - edksetup.bat has been modified to optionally build BaseTools via mingw-w64. There is no impact to the existing support for Visual C++ and Visual C++ remains the default toolchain. Usage Instructions: For the vast majority of users, the only system setup change nessesary to use a mingw-w64 toolchain is to set the BASETOOLS_MINGW_PATH to the directory containing the desired mingw-w64 based toolchain. A new command line argument has been added to edksetup.bat: Mingw-w64 If this command line argument is set, then the script will set the BASETOOLS_MINGW_BUILD environment variable. The user can also opt to set this environment variable manually before running edksetup.bat If BASETOOLS_MINGW_BUILD is defined, then the BASETOOLS_MINGW_PATH environment variable must point to the directory containing the mingw-w64 toolchain. If CLANG_BIN is not defined and %BASETOOLS_MINGW_PATH%\bin\clang.exe exists, then edksetup.bat will set CLANG_BIN=%BASETOOLS_MINGW_PATH%\bin\ This removes the requirement to configure the CLANG_BIN environment variable manually in order to run a CLANGPDB or CLANGDWARF build if one has the MSYS2 Clang distribution installed. If one wishes to use a different copy of Clang (for example official LLVM binaries) to build firmware and only use the MSYS2 Clang to build BaseTools, then one can continue to set the CLANG_BIN environment variable, same as before. I have tested the MSYS2 Clang distribution against the official LLVM distribution and can confirm that if the compiler version is the same the emitted machine code is identical between the two. Interestingly, the MSYS2 Clang distribution emits the path to the PDB file using "/" as the path seperator instead of "\". That appears to be the only difference in output. Therefore, using the MSYS2 Clang distribution to compile firmware seems a reasonable choice. If CLANG_HOST_BIN is not defined and BASETOOLS_MINGW_BUILD is defined and %BASETOOLS_MINGW_PATH%\bin\mingw32-make.exe exists, then edksetup.bat will add %BASETOOLS_MINGW_PATH%\bin\ to the PATH and set CLANG_HOST_BIN=mingw32- This enable usage of the GNU Make included in the mingw-w64 toolchain to build firmware in addition to BaseTools. if BASETOOLS_MINGW_BUILD is not defined, edksetup.bat will continue to set CLANG_HOST_BIN=n, which uses nmake to build firmware. This behavior can be overridden by manually setting the value of CLANG_HOST_BIN before executing edksetup.bat if one wishes to use a specific Make utility for the CLANGPDB/CLANGDWARF toolchains. References: - https://www.mingw-w64.org/ - https://www.msys2.org/ Co-authored-by: Sandesh Jain <sandesh.jain@intel.com> Signed-off-by: Nate DeSimone <nathaniel.l.desimone@intel.com> |
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| .. | ||
| AmlToC | ||
| AutoGen | ||
| BPDG | ||
| build | ||
| Capsule | ||
| Common | ||
| CommonDataClass | ||
| Ecc | ||
| Eot | ||
| FirmwareStorageFormat | ||
| FMMT | ||
| GenFds | ||
| GenPatchPcdTable | ||
| PatchPcdValue | ||
| Pkcs7Sign | ||
| Rsa2048Sha256Sign | ||
| Split | ||
| Table | ||
| TargetTool | ||
| tests/Split | ||
| Trim | ||
| UPT | ||
| Workspace | ||
| basetool_tiano_python_path_env.yaml | ||
| GNUmakefile | ||
| Makefile | ||
| sitecustomize.py | ||