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From 37f6a0c24bb07efb29a2222d984e4d793c165aef Mon Sep 17 00:00:00 2001
From: Martin Liska <mliska@suse.cz>
Date: Tue, 21 Dec 2021 17:43:55 +0100
Subject: [PATCH] Support ld.mold linker.
gcc/ChangeLog:
* collect2.c (main): Add ld.mold.
* common.opt: Add -fuse-ld=mold.
* doc/invoke.texi: Document it.
* gcc.c (driver_handle_option): Handle -fuse-ld=mold.
* opts.c (common_handle_option): Likewise.
---
gcc/collect2.c | 10 +++++++---
gcc/common.opt | 4 ++++
gcc/doc/invoke.texi | 4 ++++
gcc/gcc.c | 4 ++++
gcc/opts.c | 1 +
5 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/gcc/collect2.c b/gcc/collect2.c
index 0c8af2987..6bb5cf9a4 100644
--- a/gcc/collect2.c
+++ b/gcc/collect2.c
@@ -785,6 +785,7 @@ main (int argc, char **argv)
USE_GOLD_LD,
USE_BFD_LD,
USE_LLD_LD,
+ USE_MOLD_LD,
USE_LD_MAX
} selected_linker = USE_DEFAULT_LD;
static const char *const ld_suffixes[USE_LD_MAX] =
@@ -793,7 +794,8 @@ main (int argc, char **argv)
PLUGIN_LD_SUFFIX,
"ld.gold",
"ld.bfd",
- "ld.lld"
+ "ld.lld",
+ "ld.mold"
};
static const char *const real_ld_suffix = "real-ld";
static const char *const collect_ld_suffix = "collect-ld";
@@ -970,6 +972,8 @@ main (int argc, char **argv)
selected_linker = USE_GOLD_LD;
else if (strcmp (argv[i], "-fuse-ld=lld") == 0)
selected_linker = USE_LLD_LD;
+ else if (strcmp (argv[i], "-fuse-ld=mold") == 0)
+ selected_linker = USE_MOLD_LD;
else if (strncmp (argv[i], "-o", 2) == 0)
{
/* Parse the output filename if it's given so that we can make
@@ -1082,7 +1086,7 @@ main (int argc, char **argv)
ld_file_name = 0;
#ifdef DEFAULT_LINKER
if (selected_linker == USE_BFD_LD || selected_linker == USE_GOLD_LD ||
- selected_linker == USE_LLD_LD)
+ selected_linker == USE_LLD_LD || selected_linker == USE_MOLD_LD)
{
char *linker_name;
# ifdef HOST_EXECUTABLE_SUFFIX
@@ -1317,7 +1321,7 @@ main (int argc, char **argv)
else if (!use_collect_ld
&& strncmp (arg, "-fuse-ld=", 9) == 0)
{
- /* Do not pass -fuse-ld={bfd|gold|lld} to the linker. */
+ /* Do not pass -fuse-ld={bfd|gold|lld|mold} to the linker. */
ld1--;
ld2--;
}
diff --git a/gcc/common.opt b/gcc/common.opt
index 6fab7c3ca..8617124f9 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -2967,6 +2967,10 @@ fuse-ld=lld
Common Driver Negative(fuse-ld=lld)
Use the lld LLVM linker instead of the default linker.
+fuse-ld=mold
+Common Driver Negative(fuse-ld=mold)
+Use the Modern linker (MOLD) linker instead of the default linker.
+
fuse-linker-plugin
Common Undocumented Var(flag_use_linker_plugin)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 7f13ffb79..31932cf2c 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -15601,6 +15601,10 @@ Use the @command{gold} linker instead of the default linker.
@opindex fuse-ld=lld
Use the LLVM @command{lld} linker instead of the default linker.
+@item -fuse-ld=mold
+@opindex fuse-ld=mold
+Use the Modern Linker (@command{mold}) instead of the default linker.
+
@cindex Libraries
@item -l@var{library}
@itemx -l @var{library}
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 4d790f9dd..ce6366946 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -4189,6 +4189,10 @@ driver_handle_option (struct gcc_options *opts,
use_ld = ".gold";
break;
+ case OPT_fuse_ld_mold:
+ use_ld = ".mold";
+ break;
+
case OPT_fcompare_debug_second:
compare_debug_second = 1;
break;
diff --git a/gcc/opts.c b/gcc/opts.c
index 24bb64198..9192ca757 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -2875,6 +2875,7 @@ common_handle_option (struct gcc_options *opts,
case OPT_fuse_ld_bfd:
case OPT_fuse_ld_gold:
case OPT_fuse_ld_lld:
+ case OPT_fuse_ld_mold:
case OPT_fuse_linker_plugin:
/* No-op. Used by the driver and passed to us because it starts with f.*/
break;
--
2.34.1
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