264303 |
09-Apr-2014 |
dim |
MFC r263778:
Add a SUBDIR_PARALLEL option to bsd.subdir.mk, to allow make to process all the SUBDIR entries in parallel, instead of serially. Apply this option to a selected number of Makefiles, which can greatly speed up the build on multi-core machines, when using make -j.
This can be extended to more Makefiles later on, whenever they are verified to work correctly with parallel building.
I tested this on a 24-core machine, with make -j48 buildworld (N = 6):
before stddev after stddev ======= ====== ======= ====== real time 1741.1 16.5 959.8 2.7 user time 12468.7 16.4 14393.0 16.8 sys time 1825.0 54.8 2110.6 22.8
(user+sys)/real 8.2 17.1
E.g. the build was approximately 45% faster in real time. On machines with less cores, or with lower -j settings, the speedup will not be as impressive. But at least you can now almost max out a machine with buildworld!
Submitted by: jilles
MFC r263833:
Enable parallel building for gnu/usr.bin and usr.bin/clang too. |
246259 |
02-Feb-2013 |
dim |
Pull in r170135 from upstream clang trunk:
Dont use/link ARCMT, StaticAnalyzer and Rewriter to clang when the user specifies not to. Dont build ASTMatchers with Rewriter disabled and StaticAnalyzer when it's disabled.
Without all those three, the clang binary shrinks (x86_64) from ~36MB to ~32MB (unstripped).
To disable these clang components, and get a smaller clang binary built and installed, set WITHOUT_CLANG_FULL in src.conf(5). During the initial stages of buildworld, those extra components are already disabled automatically, to save some build time.
MFC after: 1 week
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232322 |
29-Feb-2012 |
dim |
Add a WITH_CLANG_IS_CC option for src.conf(5), disabled by default, that installs clang as /usr/bin/cc, /usr/bin/c++ and /usr/bin/cpp.
Note this does *not* disable building and installing gcc, which will still be available as /usr/bin/gcc, /usr/bin/g++ and /usr/bin/gcpp. If you want to disable gcc completely, you must use WITHOUT_GCC.
MFC after: 2 weeks
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231057 |
06-Feb-2012 |
dim |
Add a WITH_CLANG_EXTRAS option for src.conf(5), disabled by default, that builds the following additional llvm/clang tools:
- bugpoint - llc - lli - llvm-ar - llvm-as - llvm-bcanalyzer - llvm-diff - llvm-dis - llvm-extract - llvm-ld - llvm-link - llvm-mc - llvm-nm - llvm-objdump - llvm-prof - llvm-ranlib - llvm-rtdyld - llvm-stub - macho-dump - opt
These tools are mainly useful for people that want to manipulate llvm bitcode (.bc) and llvm assembly language (.ll) files, or want to tinker with llvm and clang themselves.
MFC after: 2 weeks
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218893 |
20-Feb-2011 |
dim |
Upgrade our copy of llvm/clang to r126079, from upstream's trunk.
This contains many improvements, primarily better C++ support, an integrated assembler for x86 and support for -pg.
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