From c18476e7f14b56840771a64f13889078ccce685a Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@google.com>
Date: Fri, 7 Mar 2008 07:00:48 +0000
Subject: [PATCH] Recognize --hash-bucket-empty-fraction.

---
 gold/options.cc | 18 ++++++++++++++++++
 gold/options.h  | 15 ++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/gold/options.cc b/gold/options.cc
index b27afe8..916ccf4 100644
--- a/gold/options.cc
+++ b/gold/options.cc
@@ -172,6 +172,17 @@ parse_uint64(const char* option_name, const char* arg, uint64_t *retval)
 }
 
 void
+parse_double(const char* option_name, const char* arg, double* retval)
+{
+  char* endptr;
+  *retval = strtod(arg, &endptr);
+  if (*endptr != '\0')
+    gold_fatal(_("%s: invalid option value "
+		 "(expected a floating point number): %s"),
+	       option_name, arg);
+}
+
+void
 parse_string(const char* option_name, const char* arg, const char** retval)
 {
   if (*arg == '\0')
@@ -661,6 +672,13 @@ General_options::finalize()
       && (this->shared() || this->relocatable()))
     gold_fatal(_("binary output format not compatible with -shared or -r"));
 
+  if (this->user_set_hash_bucket_empty_fraction()
+      && (this->hash_bucket_empty_fraction() < 0.0
+	  || this->hash_bucket_empty_fraction() >= 1.0))
+    gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
+		 "[0.0, 1.0)"),
+	       this->hash_bucket_empty_fraction());
+
   // FIXME: we can/should be doing a lot more sanity checking here.
 }
 
diff --git a/gold/options.h b/gold/options.h
index 4fe73ab..1dff71f 100644
--- a/gold/options.h
+++ b/gold/options.h
@@ -71,7 +71,10 @@ extern void
 parse_uint(const char* option_name, const char* arg, int* retval);
 
 extern void
-parse_uint64(const char* option_name, const char* arg, uint64_t *retval);
+parse_uint64(const char* option_name, const char* arg, uint64_t* retval);
+
+extern void
+parse_double(const char* option_name, const char* arg, double* retval);
 
 extern void
 parse_string(const char* option_name, const char* arg, const char** retval);
@@ -281,6 +284,12 @@ struct Struct_special : public Struct_var
              #default_value__, helpstring__, helparg__,                  \
              uint64_t, uint64_t, options::parse_uint64)
 
+#define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
+		      helpstring__, helparg__)				 \
+  DEFINE_var(varname__, dashes__, shortname__, default_value__,		 \
+	     #default_value__, helpstring__, helparg__,			 \
+	     double, double, options::parse_double)
+
 #define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
                       helpstring__, helparg__)                           \
   DEFINE_var(varname__, dashes__, shortname__, default_value__,          \
@@ -466,6 +475,10 @@ class General_options
   DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
                 N_("Set shared library name"), N_("FILENAME"));
 
+  DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
+		N_("Min fraction of empty buckets in dynamic hash"),
+		N_("FRACTION"));
+
   DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
 	      N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
 	      {"sysv", "gnu", "both"});
-- 
2.7.4