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author | Rafael Espindola <rafael.espindola@gmail.com> | 2013-06-14 23:25:53 +0000 |
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committer | Rafael Espindola <rafael.espindola@gmail.com> | 2013-06-14 23:25:53 +0000 |
commit | 250bfb1745fd72615b618e3c8748321a104d80d0 (patch) | |
tree | 0aeaf51210822a37de79ba4b6ba6dbc766b8e5c6 /tools/LLVMBuild.txt | |
parent | d6055262d23b1a8f2b5c74ab94fc6c143aca1c45 (diff) | |
download | llvm-250bfb1745fd72615b618e3c8748321a104d80d0.tar.gz llvm-250bfb1745fd72615b618e3c8748321a104d80d0.tar.bz2 llvm-250bfb1745fd72615b618e3c8748321a104d80d0.tar.xz |
Remove the LLVM specific archive index.
Archive files (.a) can have a symbol table indicating which object
files in them define which symbols. The purpose of this symbol table
is to speed up linking by allowing the linker the read only the .o
files it is actually going to use instead of having to parse every
object's symbol table.
LLVM's archive library currently supports a LLVM specific format for
such table. It is hard to see any value in that now that llvm-ld is
gone:
* System linkers don't use it: GNU ar uses the same plugin as the
linker to create archive files with a regular index. The OS X ar
creates no symbol table for IL files, I assume the linker just parses
all IL files.
* It doesn't interact well with archives having both IL and native objects.
* We probably don't want to be responsible for yet another archive
format variant.
This patch then:
* Removes support for creating and reading such index from lib/Archive.
* Remove llvm-ranlib, since there is nothing left for it to do.
We should in the future add support for regular indexes to llvm-ar for
both native and IL objects. When we do that, llvm-ranlib should be
reimplemented as a symlink to llvm-ar, as it is equivalent to "ar s".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184019 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/LLVMBuild.txt')
-rw-r--r-- | tools/LLVMBuild.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/LLVMBuild.txt b/tools/LLVMBuild.txt index 25aa177b35..9ec89f3aa2 100644 --- a/tools/LLVMBuild.txt +++ b/tools/LLVMBuild.txt @@ -16,7 +16,7 @@ ;===------------------------------------------------------------------------===; [common] -subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-jitlistener llvm-link llvm-mc llvm-nm llvm-objdump llvm-prof llvm-ranlib llvm-rtdyld llvm-size macho-dump opt llvm-mcmarkup +subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-jitlistener llvm-link llvm-mc llvm-nm llvm-objdump llvm-prof llvm-rtdyld llvm-size macho-dump opt llvm-mcmarkup [component_0] type = Group |