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fb33bc86b6
Summary: For builds with LLVM_BUILD_LLVM_DYLIB=ON and BUILD_SHARED_LIBS=OFF this change makes all symbols in the target specific libraries hidden by default. A new macro called LLVM_EXTERNAL_VISIBILITY has been added to mark symbols in these libraries public, which is mainly needed for the definitions of the LLVMInitialize* functions. This patch reduces the number of public symbols in libLLVM.so by about 25%. This should improve load times for the dynamic library and also make abi checker tools, like abidiff require less memory when analyzing libLLVM.so One side-effect of this change is that for builds with LLVM_BUILD_LLVM_DYLIB=ON and LLVM_LINK_LLVM_DYLIB=ON some unittests that access symbols that are no longer public will need to be statically linked. Before and after public symbol counts (using gcc 8.2.1, ld.bfd 2.31.1): nm before/libLLVM-9svn.so | grep ' [A-Zuvw] ' | wc -l 36221 nm after/libLLVM-9svn.so | grep ' [A-Zuvw] ' | wc -l 26278 Reviewers: chandlerc, beanz, mgorny, rnk, hans Reviewed By: rnk, hans Subscribers: merge_guards_bot, luismarques, smeenai, ldionne, lenary, s.egerton, pzheng, sameer.abuasal, MaskRay, wuzish, echristo, Jim, hiraditya, michaelplatings, chapuni, jholewinski, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, javed.absar, sbc100, jgravelle-google, aheejin, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, mgrang, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, kristina, jsji, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D54439 |
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| .. | ||
| benchmark | ||
| bugpoint | ||
| count | ||
| crosstool | ||
| docker | ||
| emacs | ||
| FileCheck | ||
| fpcmp | ||
| gdb-scripts | ||
| git-svn | ||
| gn | ||
| jedit | ||
| kate | ||
| KillTheDoctor | ||
| lint | ||
| lit | ||
| llvm-build | ||
| llvm-lit | ||
| llvm-locstats | ||
| LLVMVisualizers | ||
| Misc | ||
| not | ||
| PerfectShuffle | ||
| release | ||
| Reviewing | ||
| sanitizers | ||
| TableGen | ||
| Target/ARM | ||
| testgen | ||
| textmate | ||
| unittest | ||
| UpdateTestChecks | ||
| valgrind | ||
| vim | ||
| vscode | ||
| yaml-bench | ||
| abtest.py | ||
| add_argument_names.py | ||
| bisect | ||
| bisect-skip-count | ||
| bugpoint_gisel_reducer.py | ||
| check-each-file | ||
| chunk-print-before-all.py | ||
| clang-parse-diagnostics-file | ||
| codegen-diff | ||
| collect_and_build_with_pgo.py | ||
| countloc.sh | ||
| create_ladder_graph.py | ||
| demangle_tree.py | ||
| DSAclean.py | ||
| DSAextract.py | ||
| extract_symbols.py | ||
| extract_vplan.py | ||
| findmisopt | ||
| findoptdiff | ||
| findsym.pl | ||
| GenLibDeps.pl | ||
| GetRepositoryPath | ||
| GetSourceVersion | ||
| getsrcs.sh | ||
| indirect_calls.py | ||
| lldbDataFormatters.py | ||
| llvm-compilers-check | ||
| llvm-gisel-cov.py | ||
| llvm-native-gxx | ||
| llvm.grm | ||
| LLVMBuild.txt | ||
| llvmdo | ||
| llvmgrep | ||
| prepare-code-coverage-artifact.py | ||
| schedcover.py | ||
| shuffle_fuzz.py | ||
| shuffle_select_fuzz_tester.py | ||
| sort_includes.py | ||
| unicode-case-fold.py | ||
| update_analyze_test_checks.py | ||
| update_cc_test_checks.py | ||
| update_llc_test_checks.py | ||
| update_mca_test_checks.py | ||
| update_mir_test_checks.py | ||
| update_test_checks.py | ||
| UpdateCMakeLists.pl | ||
| wciia.py | ||