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| author | Matthew Pickering <matthewtpickering@gmail.com> | 2022-01-05 11:48:52 +0000 |
|---|---|---|
| committer | Matthew Pickering <matthewtpickering@gmail.com> | 2022-01-10 16:20:19 +0000 |
| commit | 11db9385c39155441ee97d986d5284109a070102 (patch) | |
| tree | 8efc4eca1d6b1829ecae4b9ecc5c4d001239f0ab | |
| parent | 7dc805ead3540075433c381ca43ccc4ffc91ee60 (diff) | |
| download | haskell-wip/generalise-linker.tar.gz | |
Add support for using mold linkerwip/generalise-linker
If mold is on your path when configuring, now GHC will use the
`-fuse-ld=mold` flag which very recent clang and in-future GCC 12 will
support.
Fixes #20871
| -rw-r--r-- | compiler/GHC/Driver/Session.hs | 1 | ||||
| -rw-r--r-- | compiler/GHC/SysTools/Info.hs | 3 | ||||
| -rw-r--r-- | m4/find_ld.m4 | 4 |
3 files changed, 7 insertions, 1 deletions
diff --git a/compiler/GHC/Driver/Session.hs b/compiler/GHC/Driver/Session.hs index b0b37a822c..3a6813e9a1 100644 --- a/compiler/GHC/Driver/Session.hs +++ b/compiler/GHC/Driver/Session.hs @@ -4840,6 +4840,7 @@ sccProfilingEnabled dflags = profileIsProfiling (targetProfile dflags) data LinkerInfo = GnuLD [Option] | GnuGold [Option] + | Mold [Option] | LlvmLLD [Option] | DarwinLD [Option] | SolarisLD [Option] diff --git a/compiler/GHC/SysTools/Info.hs b/compiler/GHC/SysTools/Info.hs index 83a76b9efb..8c2f62017d 100644 --- a/compiler/GHC/SysTools/Info.hs +++ b/compiler/GHC/SysTools/Info.hs @@ -97,6 +97,7 @@ https://gcc.gnu.org/onlinedocs/gcc-5.2.0/gcc.pdf : neededLinkArgs :: LinkerInfo -> [Option] neededLinkArgs (GnuLD o) = o neededLinkArgs (GnuGold o) = o +neededLinkArgs (Mold o) = o neededLinkArgs (LlvmLLD o) = o neededLinkArgs (DarwinLD o) = o neededLinkArgs (SolarisLD o) = o @@ -126,6 +127,8 @@ getLinkerInfo' logger dflags = do -- Try to grab the info from the process output. parseLinkerInfo stdo _stde _exitc + | any ("mold" `isPrefixOf`) stdo = + return (Mold [Option "-Wl,--no-as-needed"]) | any ("GNU ld" `isPrefixOf`) stdo = -- GNU ld specifically needs to use less memory. This especially -- hurts on small object files. #5240. diff --git a/m4/find_ld.m4 b/m4/find_ld.m4 index 3d4443be54..985ec24d4d 100644 --- a/m4/find_ld.m4 +++ b/m4/find_ld.m4 @@ -24,13 +24,15 @@ AC_DEFUN([FIND_LD],[ # Manually iterate over possible names since we want to ensure that, e.g., # if ld.lld is installed but gcc doesn't support -fuse-ld=lld, that we # then still try ld.gold and -fuse-ld=gold. - for possible_ld in ld.lld ld.gold ld; do + for possible_ld in mold ld.lld ld.gold ld; do TmpLd="" # In case the user set LD AC_CHECK_TARGET_TOOL([TmpLd], [$possible_ld]) if test "x$TmpLd" = "x"; then continue; fi out=`$TmpLd --version` case $out in + "mold"*) + FP_CC_LINKER_FLAG_TRY(mold, $2) ;; "GNU ld"*) FP_CC_LINKER_FLAG_TRY(bfd, $2) ;; "GNU gold"*) |