1999-07-21 Mark Elbrecht <snowball3@bigfoot.com>

	* coffcode.h (styp_to_sec_flags): If COFF_LONG_SECTION_NAMES and
	COFF_SUPPORT_GNU_LINKONCE, mark sections whose names begin with
	.gnu.linkonce with SEC_LINKONCE and SEC_LINK_DUPLICATES_DISCARD.
	* coff-go32.c: (COFF_LONG_SECTION_NAMES): Define.
	(COFF_SUPPORT_GNU_LINKONCE): Define.
	* coff-stgo32.c: (COFF_LONG_SECTION_NAMES): Define.
	(COFF_SUPPORT_GNU_LINKONCE): Define.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 9448475..2535b9e 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,13 @@
+1999-07-21  Mark Elbrecht  <snowball3@bigfoot.com>
+
+       * coffcode.h (styp_to_sec_flags): If COFF_LONG_SECTION_NAMES and
+       COFF_SUPPORT_GNU_LINKONCE, mark sections whose names begin with
+       .gnu.linkonce with SEC_LINKONCE and SEC_LINK_DUPLICATES_DISCARD.
+       * coff-go32.c: (COFF_LONG_SECTION_NAMES): Define.
+       (COFF_SUPPORT_GNU_LINKONCE): Define.
+       * coff-stgo32.c: (COFF_LONG_SECTION_NAMES): Define.
+       (COFF_SUPPORT_GNU_LINKONCE): Define.
+
 1999-07-21  Ian Lance Taylor  <ian@zembu.com>
 
        From Mark Elbrecht:

diff --git a/bfd/coff-go32.c b/bfd/coff-go32.c
index be4adb2..0b783a0 100644 (file)
--- a/bfd/coff-go32.c
+++ b/bfd/coff-go32.c
@@ -21,5 +21,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #define TARGET_SYM             go32coff_vec
 #define TARGET_NAME            "coff-go32"
 #define TARGET_UNDERSCORE      '_'
+#define COFF_LONG_SECTION_NAMES
+#define COFF_SUPPORT_GNU_LINKONCE
 
 #include "coff-i386.c"

diff --git a/bfd/coff-stgo32.c b/bfd/coff-stgo32.c
index f1d38ba..1868f67 100644 (file)
--- a/bfd/coff-stgo32.c
+++ b/bfd/coff-stgo32.c
@@ -39,6 +39,8 @@
 #define TARGET_NAME            "coff-go32-exe"
 #define TARGET_UNDERSCORE      '_'
 #define COFF_GO32_EXE
+#define COFF_LONG_SECTION_NAMES
+#define COFF_SUPPORT_GNU_LINKONCE
 
 #include "bfd.h"
 

diff --git a/bfd/coffcode.h b/bfd/coffcode.h
index f905c94..185cbcf 100644 (file)
--- a/bfd/coffcode.h
+++ b/bfd/coffcode.h
@@ -687,6 +687,17 @@ styp_to_sec_flags (abfd, hdr, name)
     }
 #endif
 
+#if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
+  /* As a GNU extension, if the name begins with .gnu.linkonce, we
+     only link a single copy of the section.  This is used to support
+     g++.  g++ will emit each template expansion in its own section.
+     The symbols will be defined as weak, so that multiple definitions
+     are permitted.  The GNU linker extension is to actually discard
+     all but one of the sections.  */
+  if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
+    sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+#endif
+
   return (sec_flags);
 }