[RS6000] Don't pass --oformat to ld

ld -m options select a particular ld emulation (e*.c files in ld build
dir) which provides a compiled-in scripts or select a script from
ldscripts/.  Each of these has an OUTPUT_FORMAT statement, which does
the same thing as --oformat.  --oformat is therefore redundant when
using GNU ld built this century, except possibly when overriding the
default ld scripts with -T.

	* config/rs6000/sysv4le.h (LINK_TARGET_SPEC): Don't define.
	* config/rs6000/sysv4.h (LINK_TARGET_SPEC): Likewise.
	(LINK_SPEC, SUBTARGET_EXTRA_SPECS): Delete link_target.

From-SVN: r227397

gcc/ChangeLog

 2015-09-02  Alan Modra  <amodra@gmail.com>
 
+	* config/rs6000/sysv4le.h (LINK_TARGET_SPEC): Don't define.
+	* config/rs6000/sysv4.h (LINK_TARGET_SPEC): Likewise.
+	(LINK_SPEC, SUBTARGET_EXTRA_SPECS): Delete link_target.
+
+2015-09-02  Alan Modra  <amodra@gmail.com>
+
 	PR target/67417
 	* config/rs6000/predicates.md (current_file_function_operand): Don't
 	return true for weak symbols.

gcc/config/rs6000/sysv4.h

@@ -574,7 +574,6 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
 %{R*} \
 %(link_shlib) \
 %{!T*: %(link_start) } \
-%(link_target) \
 %(link_os)"
 
 /* Shared libraries are not default.  */
@@ -584,10 +583,6 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
 %{shared:-G -dy -z text } \
 %{symbolic:-Bsymbolic -G -dy -z text }"
 
-/* Override the default target of the linker.  */
-#define	LINK_TARGET_SPEC \
-  ENDIAN_SELECT("", " --oformat elf32-powerpcle", "")
-
 /* Any specific OS flags.  */
 #define LINK_OS_SPEC "\
 %{mads         : %(link_os_ads)         ; \
@@ -873,7 +868,6 @@ ncrtn.o%s"
   { "endfile_openbsd",		ENDFILE_OPENBSD_SPEC },			\
   { "endfile_default",		ENDFILE_DEFAULT_SPEC },			\
   { "link_shlib",		LINK_SHLIB_SPEC },			\
-  { "link_target",		LINK_TARGET_SPEC },			\
   { "link_start",		LINK_START_SPEC },			\
   { "link_start_ads",		LINK_START_ADS_SPEC },			\
   { "link_start_yellowknife",	LINK_START_YELLOWKNIFE_SPEC },		\

gcc/config/rs6000/sysv4le.h

@@ -25,10 +25,6 @@
 #undef	DEFAULT_ASM_ENDIAN
 #define	DEFAULT_ASM_ENDIAN " -mlittle"
 
-#undef	LINK_TARGET_SPEC
-#define	LINK_TARGET_SPEC \
-  ENDIAN_SELECT(" --oformat elf32-powerpc", "", "")
-
 #undef	MULTILIB_DEFAULTS
 #define	MULTILIB_DEFAULTS { "mlittle", "mcall-sysv" }