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gcc: add patch to improve GOLD support

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Signed-off-by: Stephan Raue <stephan@openelec.tv>
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Stephan Raue 2013-05-16 01:35:39 +02:00
parent 32780806a3
commit a93bc1a0a6
1 changed files with 323 additions and 0 deletions
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323
packages/toolchain/lang/gcc/patches/gcc-Support-fuse-ld-bfd-and-fuse-ld-gold.patch Normal file
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@ -0,0 +1,323 @@
From 18514bb58339ccee148545fd2a61f9dba1beabd8 Mon Sep 17 00:00:00 2001
From: Stefan Saraev <stefan@saraev.ca>
Date: Wed, 15 May 2013 21:41:47 +0300
Subject: [PATCH] gcc: Support -fuse-ld=bfd and -fuse-ld=gold
this is a (partial) backport of the following patches
http://gcc.gnu.org/git/?p=gcc.git;a=patch;h=71f006b89ca312590ac63b99c9d85c0ca116fa94
http://gcc.gnu.org/git/?p=gcc.git;a=patch;h=eadecd281f2d8bc957c4a613b67d27aeb7497412
http://gcc.gnu.org/git/?p=gcc.git;a=patch;h=61f41b94c58c64e7334d97df57d6467cb1c7b70e
http://gcc.gnu.org/git/?p=gcc.git;a=patch;h=99d5fe2dc7fe91aa2471ae80315c9a9a60e43dc4
---
gcc/collect2.c | 68 ++++++++++++++++++++++++++++++++++++---------------
gcc/common.opt | 8 ++++++
gcc/config.in | 2 +-
gcc/configure | 12 ++++++--
gcc/configure.ac | 12 ++++++--
gcc/doc/invoke.texi | 8 +++++-
gcc/gcc.c | 3 +-
gcc/opts.c | 2 +
8 files changed, 86 insertions(+), 29 deletions(-)
diff --git a/gcc/collect2.c b/gcc/collect2.c
index 748a3f4..e7e1887 100644
--- a/gcc/collect2.c
+++ b/gcc/collect2.c
@@ -1020,8 +1020,21 @@ maybe_run_lto_and_relink (char **lto_ld_argv, char **object_lst,
int
main (int argc, char **argv)
{
- static const char *const ld_suffix = "ld";
- static const char *const plugin_ld_suffix = PLUGIN_LD;
+ enum linker_select
+ {
+ USE_DEFAULT_LD,
+ USE_PLUGIN_LD,
+ USE_GOLD_LD,
+ USE_BFD_LD,
+ USE_LD_MAX
+ } selected_linker = USE_DEFAULT_LD;
+ static const char *const ld_suffixes[USE_LD_MAX] =
+ {
+ "ld",
+ PLUGIN_LD_SUFFIX,
+ "ld.gold",
+ "ld.bfd"
+ };
static const char *const real_ld_suffix = "real-ld";
static const char *const collect_ld_suffix = "collect-ld";
static const char *const nm_suffix = "nm";
@@ -1032,16 +1045,13 @@ main (int argc, char **argv)
static const char *const strip_suffix = "strip";
static const char *const gstrip_suffix = "gstrip";
+ const char *full_ld_suffixes[USE_LD_MAX];
#ifdef CROSS_DIRECTORY_STRUCTURE
/* If we look for a program in the compiler directories, we just use
the short name, since these directories are already system-specific.
But it we look for a program in the system directories, we need to
qualify the program name with the target machine. */
- const char *const full_ld_suffix =
- concat(target_machine, "-", ld_suffix, NULL);
- const char *const full_plugin_ld_suffix =
- concat(target_machine, "-", plugin_ld_suffix, NULL);
const char *const full_nm_suffix =
concat (target_machine, "-", nm_suffix, NULL);
const char *const full_gnm_suffix =
@@ -1055,13 +1065,11 @@ main (int argc, char **argv)
const char *const full_gstrip_suffix =
concat (target_machine, "-", gstrip_suffix, NULL);
#else
- const char *const full_ld_suffix = ld_suffix;
- const char *const full_plugin_ld_suffix = plugin_ld_suffix;
- const char *const full_nm_suffix = nm_suffix;
- const char *const full_gnm_suffix = gnm_suffix;
#ifdef LDD_SUFFIX
const char *const full_ldd_suffix = ldd_suffix;
#endif
+ const char *const full_nm_suffix = nm_suffix;
+ const char *const full_gnm_suffix = gnm_suffix;
const char *const full_strip_suffix = strip_suffix;
const char *const full_gstrip_suffix = gstrip_suffix;
#endif /* CROSS_DIRECTORY_STRUCTURE */
@@ -1078,6 +1086,7 @@ main (int argc, char **argv)
char **ld1_argv;
const char **ld1;
bool use_plugin = false;
+ bool use_collect_ld = false;
/* The kinds of symbols we will have to consider when scanning the
outcome of a first pass link. This is ALL to start with, then might
@@ -1097,6 +1106,15 @@ main (int argc, char **argv)
int first_file;
int num_c_args;
char **old_argv;
+ int i;
+
+ for (i = 0; i < USE_LD_MAX; i++)
+ full_ld_suffixes[i]
+#ifdef CROSS_DIRECTORY_STRUCTURE
+ = concat (target_machine, "-", ld_suffixes[i], NULL);
+#else
+ = ld_suffixes[i];
+#endif
p = argv[0] + strlen (argv[0]);
while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
@@ -1158,7 +1176,6 @@ main (int argc, char **argv)
are called. We also look for the -flto or -flto-partition=none flag to know
what LTO mode we are in. */
{
- int i;
bool no_partition = false;
for (i = 1; argv[i] != NULL; i ++)
@@ -1176,7 +1193,14 @@ main (int argc, char **argv)
{
use_plugin = true;
lto_mode = LTO_MODE_NONE;
+ if (selected_linker == USE_DEFAULT_LD)
+ selected_linker = USE_PLUGIN_LD;
}
+ else if (strcmp (argv[i], "-fuse-ld=bfd") == 0)
+ selected_linker = USE_BFD_LD;
+ else if (strcmp (argv[i], "-fuse-ld=gold") == 0)
+ selected_linker = USE_GOLD_LD;
+
#ifdef COLLECT_EXPORT_LIST
/* since -brtl, -bexport, -b64 are not position dependent
also check for them here */
@@ -1272,21 +1296,18 @@ main (int argc, char **argv)
ld_file_name = find_a_file (&cpath, real_ld_suffix);
/* Likewise for `collect-ld'. */
if (ld_file_name == 0)
- ld_file_name = find_a_file (&cpath, collect_ld_suffix);
+ {
+ ld_file_name = find_a_file (&cpath, collect_ld_suffix);
+ use_collect_ld = ld_file_name != 0;
+ }
/* Search the compiler directories for `ld'. We have protection against
recursive calls in find_a_file. */
if (ld_file_name == 0)
- ld_file_name = find_a_file (&cpath,
- use_plugin
- ? plugin_ld_suffix
- : ld_suffix);
+ ld_file_name = find_a_file (&cpath, ld_suffixes[selected_linker]);
/* Search the ordinary system bin directories
for `ld' (if native linking) or `TARGET-ld' (if cross). */
if (ld_file_name == 0)
- ld_file_name = find_a_file (&path,
- use_plugin
- ? full_plugin_ld_suffix
- : full_ld_suffix);
+ ld_file_name = find_a_file (&path, full_ld_suffixes[selected_linker]);
#ifdef REAL_NM_FILE_NAME
nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME);
@@ -1443,6 +1464,13 @@ main (int argc, char **argv)
"configuration");
#endif
}
+ else if (!use_collect_ld
+ && strncmp (arg, "-fuse-ld=", 9) == 0)
+ {
+ /* Do not pass -fuse-ld={bfd|gold} to the linker. */
+ ld1--;
+ ld2--;
+ }
#ifdef TARGET_AIX_VERSION
else
{
diff --git a/gcc/common.opt b/gcc/common.opt
index e72d8cf..2e938f1 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -2089,6 +2089,14 @@ funwind-tables
Common Report Var(flag_unwind_tables) Optimization
Just generate unwind tables for exception handling
+fuse-ld=bfd
+Common Negative(fuse-ld=gold)
+Use the bfd linker instead of the default linker
+
+fuse-ld=gold
+Common Negative(fuse-ld=bfd)
+Use the gold linker instead of the default linker
+
fuse-linker-plugin
Common Undocumented
diff --git a/gcc/config.in b/gcc/config.in
index 2e632b2..b391b62 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -1700,7 +1700,7 @@
/* Specify plugin linker */
#ifndef USED_FOR_TARGET
-#undef PLUGIN_LD
+#undef PLUGIN_LD_SUFFIX
#endif
diff --git a/gcc/configure b/gcc/configure
index 91adc79..3480292 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -21597,20 +21597,26 @@ fi
fi
ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
-PLUGIN_LD=`basename $gcc_cv_ld`
+PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
+# if the PLUGIN_LD is set ld-new, just have it as ld
+# as that is the installed named.
+if test x$PLUGIN_LD_SUFFIX = xld-new \
+ || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
+ PLUGIN_LD_SUFFIX=ld
+fi
# Check whether --with-plugin-ld was given.
if test "${with_plugin_ld+set}" = set; then :
withval=$with_plugin_ld; if test x"$withval" != x; then
ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
- PLUGIN_LD="$withval"
+ PLUGIN_LD_SUFFIX=`echo $withval | sed -e "s,$target_alias-,,"`
fi
fi
cat >>confdefs.h <<_ACEOF
-#define PLUGIN_LD "$PLUGIN_LD"
+#define PLUGIN_LD_SUFFIX "$PLUGIN_LD_SUFFIX"
_ACEOF
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 1d41895..0063a3d 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -2051,15 +2051,21 @@ else
fi])
ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
-PLUGIN_LD=`basename $gcc_cv_ld`
+PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
+# if the PLUGIN_LD is set ld-new, just have it as ld
+# as that is the installed named.
+if test x$PLUGIN_LD_SUFFIX = xld-new \
+ || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
+ PLUGIN_LD_SUFFIX=ld
+fi
AC_ARG_WITH(plugin-ld,
[AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
[if test x"$withval" != x; then
ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
- PLUGIN_LD="$withval"
+ PLUGIN_LD_SUFFIX=`echo $withval | sed -e "s,$target_alias-,,"`
fi])
AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
-AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
+AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
# Check to see if we are using gold instead of ld
AC_MSG_CHECKING(whether we are using gold)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index f989952..ee33b03 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -415,7 +415,7 @@ Objective-C and Objective-C++ Dialects}.
-funit-at-a-time -funroll-all-loops -funroll-loops @gol
-funsafe-loop-optimizations -funsafe-math-optimizations -funswitch-loops @gol
-fvariable-expansion-in-unroller -fvect-cost-model -fvpt -fweb @gol
--fwhole-program -fwpa -fuse-linker-plugin @gol
+-fwhole-program -fwpa -fuse-ld=@var{linker} -fuse-linker-plugin @gol
--param @var{name}=@var{value}
-O -O0 -O1 -O2 -O3 -Os -Ofast}
@@ -8042,6 +8042,12 @@ the comparison operation before register allocation is complete.
Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
+@item -fuse-ld=bfd
+Use the @command{bfd} linker instead of the default linker.
+
+@item -fuse-ld=gold
+Use the @command{gold} linker instead of the default linker.
+
@item -fcprop-registers
@opindex fcprop-registers
After register allocation and post-register allocation instruction splitting,
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 939dcc8..a6da5c9 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -672,7 +672,8 @@ proper position among the other output files. */
LINK_PLUGIN_SPEC \
"%{flto|flto=*:%<fcompare-debug*} \
%{flto} %{flto=*} %l " LINK_PIE_SPEC \
- "%X %{o*} %{e*} %{N} %{n} %{r}\
+ "%{fuse-ld=*:-fuse-ld=%*}\
+ %X %{o*} %{e*} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}}\
%{static:} %{L*} %(mfwrap) %(link_libgcc) %o\
%{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
diff --git a/gcc/opts.c b/gcc/opts.c
index 6532b56..109c3ee 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1735,6 +1735,8 @@ common_handle_option (struct gcc_options *opts,
dc->max_errors = value;
break;
+ case OPT_fuse_ld_bfd:
+ case OPT_fuse_ld_gold:
case OPT_fuse_linker_plugin:
/* No-op. Used by the driver and passed to us because it starts with f.*/
break;
--
1.7.2.5