Make default compression gABI compliant

All programs in binutils+gdb git repo now support gABI compression
with the SHF_COMPRESSED bit.  This patch makes the zlib-gabi option
as compression default for gas, gold, ld and objcopy, instead of the
zlib-gnu option whose outputs are incompatible with gABI.

binutils/

	* objcopy.c (copy_file): Set BFD_COMPRESS_GABI if not
	zlib-gnu.
	* doc/binutils.texi: Change --compress-debug-sections and
	--compress-debug-sections=zlib to zlib-gabi.

binutils/testsuite/

	* binutils-all/compress.exp: Update.

gas/

	* as.c (parse_args): Make --compress-debug-sections and
	--compress-debug-sections=zlib the same as
	--compress-debug-sections=zlib-gabi.
	* doc/as.texinfo: Change --compress-debug-sections and
	--compress-debug-sections=zlib to zlib-gabi.

gold/

	* compressed_output.cc (Output_compressed_section::set_final_data_size):
	Make --compress-debug-sections=zlib the same as
	--compress-debug-sections=zlib-gabi.
	* testsuite/Makefile.am (flagstest_compress_debug_sections.check):
	Expect ".debug_.*" with the SHF_COMPRESSED bit, instead of
	".zdebug_".
	* testsuite/Makefile.in: Regenerated.

ld/

	* emultempl/elf32.em (gld${EMULATION_NAME}_handle_option): Make
	--compress-debug-sections=zlib the same as
	--compress-debug-sections=zlib-gabi.
	* ld.texinfo: Change --compress-debug-sections=zlib to zlib-gabi.

ld/testsuite/

	* ld-elf/zlibbegin.rS: Updated to .debug_.* with the
	SHF_COMPRESSED bit.
	* ld-elf/zlibnormal.rS: Likewise.

2 files changed, 18 insertions, 9 deletions

diff --git a/binutils/testsuite/ChangeLog b/binutils/testsuite/ChangeLog
index 435961a..5f4fbc3 100644
--- a/binutils/testsuite/ChangeLog
+++ b/binutils/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-07-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* binutils-all/compress.exp: Update.
+
 2015-07-10  H.J. Lu  <hongjiu.lu@intel.com>
 
 	 PR binutils/18656
diff --git a/binutils/testsuite/binutils-all/compress.exp b/binutils/testsuite/binutils-all/compress.exp
index abff197..4dac503 100644
--- a/binutils/testsuite/binutils-all/compress.exp
+++ b/binutils/testsuite/binutils-all/compress.exp
@@ -39,7 +39,12 @@ if { ![binutils_assemble_flags $srcdir/$subdir/dw2-1.S ${compressedfile}.o --com
     return
 }
 
-set got [remote_exec host "cmp ${testfile}.o ${compressedfile}.o"]
+if { ![binutils_assemble_flags $srcdir/$subdir/dw2-1.S ${compressedfile}gnu.o --compress-debug-sections=zlib-gnu] } then {
+    unsupported "compressed debug sections with zlib-gnu"
+    return
+}
+
+set got [remote_exec host "cmp ${testfile}.o ${compressedfile}gnu.o"]
 # Use it to set up xfail.
 set exec_output [lindex $got 1]
 if [string match "" $exec_output] then {
@@ -136,8 +141,8 @@ if ![string match "" $got] then {
 
 # Xfail this test if there are no compressed sections.
 setup_xfail "$compression_used$target_triplet"
-set testname "objcopy compress debug sections in archive"
-set got [binutils_run $OBJCOPY "--compress-debug-sections ${copyfile}.a ${compressedcopyfile}.a"]
+set testname "objcopy compress debug sections in archive with zlib-gnu"
+set got [binutils_run $OBJCOPY "--compress-debug-sections=zlib-gnu ${copyfile}.a ${compressedcopyfile}.a"]
 if ![string match "" $got] then {
     fail "objcopy ($testname)"
 } else {
@@ -228,13 +233,13 @@ if { ![binutils_assemble_flags $srcdir/$subdir/dw2-1.S ${compressedfile}gnu.o --
     return
 }
 
-set src1 ${compressedfile}gnu.o
+set src1 ${compressedfile}gabi.o
 set src2 ${compressedfile}.o
 set status [remote_exec build cmp "${src1} ${src2}"]
 set exec_output [lindex $status 1]
 set exec_output [prune_warnings $exec_output]
 if ![string match "" $exec_output] then {
-    fail "compressed debug sections with zlib-gnu"
+    fail "compressed debug sections with zlib-gabi"
     return
 }
 
@@ -248,13 +253,13 @@ if { ![binutils_assemble_flags $srcdir/$subdir/dw2-2.S ${compressedfile2}gnu.o -
     return
 }
 
-set src1 ${compressedfile2}gnu.o
+set src1 ${compressedfile2}gabi.o
 set src2 ${compressedfile2}.o
 set status [remote_exec build cmp "${src1} ${src2}"]
 set exec_output [lindex $status 1]
 set exec_output [prune_warnings $exec_output]
 if ![string match "" $exec_output] then {
-    fail "compressed debug sections with zlib-gnu"
+    fail "compressed debug sections with zlib-gabi"
     return
 }
 
@@ -292,13 +297,13 @@ if { ![binutils_assemble_flags $srcdir/$subdir/dw2-3.S ${compressedfile3}gnu.o -
     return
 }
 
-set src1 ${compressedfile3}gnu.o
+set src1 ${compressedfile3}gabi.o
 set src2 ${compressedfile3}.o
 set status [remote_exec build cmp "${src1} ${src2}"]
 set exec_output [lindex $status 1]
 set exec_output [prune_warnings $exec_output]
 if ![string match "" $exec_output] then {
-    fail "compressed debug sections with zlib-gnu"
+    fail "compressed debug sections with zlib-gabi"
     return
 }