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<p class="MsoNormal">Hello everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have been working on overhauling the CMake build system for the LLVM OpenMP Runtime library. Instead of sending 1000 small updates, I decided to do a complete refactoring/reorganizing/renaming/you-name-it-I-did-it. **<b>All the interface
variables are still the same (LIBOMP_OS, LIBOMP_ARCH, etc.)**</b>. So there was no change there. Here are the major changes:<o:p></o:p></p>
<p class="MsoNormal">1) Renaming internal variables/macros/functions – everything has libomp_ or LIBOMP_ prefixed to it unless maybe if it is a local variable/parameter inside a function/macro.<o:p></o:p></p>
<p class="MsoNormal">2) config-ix.cmake added – compiler flag checks, linker flag checks, some feature checks, threading-model check. This means cmake/${CMAKE_C_COMPILER_ID}/*Flags.cmake directories/files are deleted.<o:p></o:p></p>
<p class="MsoNormal">3) All files inside cmake/ subdirectory are renamed to Libompxyz.cmake<o:p></o:p></p>
<p class="MsoNormal">4) I cut off most of the vestigial parts that were a part of the translation of build.pl system. There are still a few that remain like LibompExports.cmake (copying things to exports/ subdirectory) and LibompMicroTests.cmake (small tests
to run on the just created library. This is invoked with make libomp-micro-tests), but these can easily be cut off because they are in their own files and surrounded by an if() guard in the CMakeLists.txt file.<o:p></o:p></p>
<p class="MsoNormal">5) Added LLVM-architecture detection if we are part of an LLVM build.<o:p></o:p></p>
<p class="MsoNormal">6) If you want, you can use LIBOMP_ARCH=i386 or LIBOMP_ARCH=x86_64 instead of LIBOMP_ARCH=32 or LIBOMP_ARCH=32e (although 32 and 32e still exist)<o:p></o:p></p>
<p class="MsoNormal">7) Unused functions/macros have been cut away.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is easier to review if you just patch and take a look at files runtime/CMakeLists.txt, runtime/src/CMakeLists.txt, cmake/Libomp*.cmake:<o:p></o:p></p>
<p class="MsoNormal">$ patch –p1 –E < CMake_overhaul_v1.patch<o:p></o:p></p>
<p class="MsoNormal">[-E removes empty files created by the patch]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve tested this out on x86 Linux, Mac, MIC, Windows and it works, but I can’t test it on other architectures.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Leave feedback, recommendations.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-- Johnny<o:p></o:p></p>
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