forked from OSchip/llvm-project
c5b3de6745
This works with the automatic export of all symbols; in MinGW mode, when a DLL has no explicit dllexports, it exports all symbols (except for some that are hardcoded to be excluded, including some toolchain libraries). By hooking up the hidden visibility to the -exclude-symbols: directive, the automatic export of all symbols can be controlled in an easier way (with a mechanism that doesn't require strict annotation of every single symbol, but which allows gradually marking more unnecessary symbols as hidden). The primary use case is dylib builds of LLVM/Clang. These can be done in MinGW mode but not in MSVC mode, as MinGW builds can export all symbols (and the calling code can use APIs without corresponding dllimport directives). However, as all symbols are exported, it can easily overflow the max number of exported symbols in a DLL (65536). In the llvm-mingw distribution, only the X86, ARM and AArch64 backends are enabled; for the LLVM 13.0.0 release, libLLVM-13.dll ended up with 58112 exported symbols. For LLVM 14.0.0, it was 62015 symbols. Current builds of the 15.x branch end up at around 64650 symbols - i.e. extremely close to the limit. The msys2 packages of LLVM have had to progressively disable more of their backends in their builds, to be able to keep building with a dylib. This allows improving the current mingw dylib situation significantly, by using the same hidden visibility options and attributes as on Unix. With those in place, a current build of LLVM git main ends up at 35142 symbols instead of 64650. For code using hidden visibility, this now requires linking with either a current git lld or ld.bfd. (Older lld error out on the unknown directives, older ld.bfd will successfully link, but will print huge amounts of warnings.) Differential Revision: https://reviews.llvm.org/D130121 |
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AMDGPU | ||
AMDGPUDwarfExtensionAllowLocationDescriptionOnTheDwarfExpressionStack | ||
CommandGuide | ||
DependenceGraphs | ||
Frontend | ||
GlobalISel | ||
HistoricalNotes | ||
PDB | ||
Proposals | ||
TableGen | ||
_ocamldoc | ||
_static | ||
_templates | ||
_themes/llvm-theme | ||
tutorial | ||
AMDGPUDwarfExtensionsForHeterogeneousDebugging.rst | ||
AMDGPUInstructionNotation.rst | ||
AMDGPUInstructionSyntax.rst | ||
AMDGPUModifierSyntax.rst | ||
AMDGPUOperandSyntax.rst | ||
AMDGPUUsage.rst | ||
ARM-BE-bitcastfail.png | ||
ARM-BE-bitcastsuccess.png | ||
ARM-BE-ld1.png | ||
ARM-BE-ldr.png | ||
AddingConstrainedIntrinsics.rst | ||
AdvancedBuilds.rst | ||
AliasAnalysis.rst | ||
Atomics.rst | ||
Benchmarking.rst | ||
BigEndianNEON.rst | ||
BitCodeFormat.rst | ||
BlockFrequencyTerminology.rst | ||
BranchWeightMetadata.rst | ||
BugLifeCycle.rst | ||
Bugpoint.rst | ||
BugpointRedesign.md | ||
BuildingADistribution.rst | ||
CFIVerify.rst | ||
CMake.rst | ||
CMakeLists.txt | ||
CMakePrimer.rst | ||
CodeGenerator.rst | ||
CodeOfConduct.rst | ||
CodeReview.rst | ||
CodingStandards.rst | ||
CommandLine.rst | ||
CompileCudaWithLLVM.rst | ||
CompilerWriterInfo.rst | ||
Contributing.rst | ||
Coroutines.rst | ||
CoverageMappingFormat.rst | ||
CycleTerminology.rst | ||
DebuggingJITedCode.rst | ||
DeveloperPolicy.rst | ||
DirectXUsage.rst | ||
DiscourseMigrationGuide.md | ||
Docker.rst | ||
ExceptionHandling.rst | ||
ExtendedIntegerResults.txt | ||
ExtendingLLVM.rst | ||
Extensions.rst | ||
FAQ.rst | ||
FaultMaps.rst | ||
FuzzingLLVM.rst | ||
GarbageCollection.rst | ||
GetElementPtr.rst | ||
GettingInvolved.rst | ||
GettingStarted.rst | ||
GettingStartedTutorials.rst | ||
GettingStartedVS.rst | ||
GitBisecting.rst | ||
GitHub.rst | ||
GitRepositoryPolicy.md | ||
GoldPlugin.rst | ||
GwpAsan.rst | ||
HowToAddABuilder.rst | ||
HowToBuildOnARM.rst | ||
HowToBuildWindowsItaniumPrograms.rst | ||
HowToBuildWithPGO.rst | ||
HowToCrossCompileBuiltinsOnArm.rst | ||
HowToCrossCompileLLVM.rst | ||
HowToReleaseLLVM.rst | ||
HowToSetUpLLVMStyleRTTI.rst | ||
HowToSubmitABug.rst | ||
HowToUpdateDebugInfo.rst | ||
HowToUseAttributes.rst | ||
HowToUseInstrMappings.rst | ||
InAlloca.rst | ||
InstrRefDebugInfo.md | ||
JITLink.rst | ||
LangRef.rst | ||
Lexicon.rst | ||
LibFuzzer.rst | ||
LinkTimeOptimization.rst | ||
LoopTerminology.rst | ||
MCJIT-creation.png | ||
MCJIT-dyld-load.png | ||
MCJIT-engine-builder.png | ||
MCJIT-load-object.png | ||
MCJIT-load.png | ||
MCJIT-resolve-relocations.png | ||
MCJITDesignAndImplementation.rst | ||
MIRLangRef.rst | ||
MarkdownQuickstartTemplate.md | ||
MarkedUpDisassembly.rst | ||
MeetupGuidelines.rst | ||
MemTagSanitizer.rst | ||
MemorySSA.rst | ||
MergeFunctions.rst | ||
MisExpect.rst | ||
MyFirstTypoFix.rst | ||
NVPTXUsage.rst | ||
NewPassManager.rst | ||
ORCv2.rst | ||
OpaquePointers.rst | ||
OptBisect.rst | ||
Packaging.rst | ||
Passes.rst | ||
Phabricator.rst | ||
Phabricator_premerge_results.png | ||
Phabricator_premerge_unit_tests.png | ||
PointerAuth.md | ||
ProgrammersManual.rst | ||
Projects.rst | ||
README.txt | ||
Reference.rst | ||
ReleaseNotes.rst | ||
ReleaseProcess.rst | ||
Remarks.rst | ||
ReportingGuide.rst | ||
ResponseGuide.rst | ||
SPIRVUsage.rst | ||
ScudoHardenedAllocator.rst | ||
Security.rst | ||
SecurityTransparencyReports.rst | ||
SegmentedStacks.rst | ||
SourceLevelDebugging.rst | ||
SpeculativeLoadHardening.md | ||
SphinxQuickstartTemplate.rst | ||
StackMaps.rst | ||
StackSafetyAnalysis.rst | ||
Statepoints.rst | ||
SupportLibrary.rst | ||
SupportPolicy.rst | ||
SymbolizerMarkupFormat.rst | ||
SystemLibrary.rst | ||
TableGenFundamentals.rst | ||
TestSuiteGuide.md | ||
TestSuiteMakefileGuide.rst | ||
TestingGuide.rst | ||
TransformMetadata.rst | ||
TypeMetadata.rst | ||
UserGuides.rst | ||
Vectorizers.rst | ||
WritingAnLLVMBackend.rst | ||
WritingAnLLVMNewPMPass.rst | ||
WritingAnLLVMPass.rst | ||
XRay.rst | ||
XRayExample.rst | ||
XRayFDRFormat.rst | ||
YamlIO.rst | ||
buildbot_worker_contact.png | ||
conf.py | ||
cycle-1.png | ||
cycle-2.png | ||
cycle-3.png | ||
doxygen-mainpage.dox | ||
doxygen.cfg.in | ||
epilogue-vectorization-cfg.png | ||
gcc-loops.png | ||
index.rst | ||
linpack-pc.png | ||
llvm-objdump.1 | ||
loop-guard.svg | ||
loop-irreducible.svg | ||
loop-merge.svg | ||
loop-nested.svg | ||
loop-nonmaximal.svg | ||
loop-separate.svg | ||
loop-single.svg | ||
loop-terminology-guarded-loop.png | ||
loop-terminology-initial-loop.png | ||
loop-terminology-rotated-loop.png | ||
loop-terminology.svg | ||
make.bat | ||
re_format.7 | ||
speculative_load_hardening_microbenchmarks.png | ||
yaml2obj.rst |
README.txt
LLVM Documentation ================== LLVM's documentation is written in reStructuredText, a lightweight plaintext markup language (file extension `.rst`). While the reStructuredText documentation should be quite readable in source form, it is mostly meant to be processed by the Sphinx documentation generation system to create HTML pages which are hosted on <https://llvm.org/docs/> and updated after every commit. Manpage output is also supported, see below. If you instead would like to generate and view the HTML locally, install Sphinx <http://sphinx-doc.org/> and then do: cd <build-dir> cmake -DLLVM_ENABLE_SPHINX=true -DSPHINX_OUTPUT_HTML=true <src-dir> make -j3 docs-llvm-html $BROWSER <build-dir>/docs/html/index.html The mapping between reStructuredText files and generated documentation is `docs/Foo.rst` <-> `<build-dir>/docs//html/Foo.html` <-> `https://llvm.org/docs/Foo.html`. If you are interested in writing new documentation, you will want to read `SphinxQuickstartTemplate.rst` which will get you writing documentation very fast and includes examples of the most important reStructuredText markup syntax. Manpage Output =============== Building the manpages is similar to building the HTML documentation. The primary difference is to use the `man` makefile target, instead of the default (which is `html`). Sphinx then produces the man pages in the directory `<build-dir>/docs/man/`. cd <build-dir> cmake -DLLVM_ENABLE_SPHINX=true -DSPHINX_OUTPUT_MAN=true <src-dir> make -j3 docs-llvm-man man -l <build-dir>/docs/man/FileCheck.1 The correspondence between .rst files and man pages is `docs/CommandGuide/Foo.rst` <-> `<build-dir>/docs//man/Foo.1`. These .rst files are also included during HTML generation so they are also viewable online (as noted above) at e.g. `https://llvm.org/docs/CommandGuide/Foo.html`. Checking links ============== The reachability of external links in the documentation can be checked by running: cd llvm/docs/ sphinx-build -b linkcheck . _build/lintcheck/ # report will be generated in _build/lintcheck/output.txt Doxygen page Output ============== Install doxygen <https://www.doxygen.nl/download.html> and dot2tex <https://dot2tex.readthedocs.io/en/latest>. cd <build-dir> cmake -DLLVM_ENABLE_DOXYGEN=On <llvm-top-src-dir> make doxygen-llvm # for LLVM docs make doxygen-clang # for clang docs It will generate html in <build-dir>/docs/doxygen/html # for LLVM docs <build-dir>/tools/clang/docs/doxygen/html # for clang docs