Set BFD_DECOMPRESS to decompress debug sections

We should set BFD_DECOMPRESS to decompress debug sections when reading in
DWARF debug sections.

Backport from master

bfd/

	PR binutils/19523
	* dwarf2.c (_bfd_dwarf2_slurp_debug_info): Set BFD_DECOMPRESS to
	decompress debug sections.

binutils/

	PR binutils/19523
	* Makefile.am (check-DEJAGNU): Pass CC and CC_FOR_BUILD to
	runtest.
	* Makefile.in: Regenerated.
	* testsuite/binutils-all/compress.exp (test_gnu_debuglink): New
	proc.
	Run test_gnu_debuglink for native ELF build.

6 files changed, 121 insertions, 2 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index a8beeccbdba..7b2b0013d33 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,12 @@
+2016-03-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backport from master
+	2016-01-28  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/19523
+	* dwarf2.c (_bfd_dwarf2_slurp_debug_info): Set BFD_DECOMPRESS to
+	decompress debug sections.
+
 2016-03-09  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/19579
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 176f018add2..64cfe9b9cbc 100644
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -3706,8 +3706,10 @@ _bfd_dwarf2_slurp_debug_info (bfd *abfd, bfd *debug_bfd,
 	   fail more quickly.  */
 	return FALSE;
 
+      /* Set BFD_DECOMPRESS to decompress debug sections.  */
       if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
-	  || ! bfd_check_format (debug_bfd, bfd_object)
+	  || !(debug_bfd->flags |= BFD_DECOMPRESS,
+	       bfd_check_format (debug_bfd, bfd_object))
 	  || (msec = find_debug_info (debug_bfd,
 				      debug_sections, NULL)) == NULL
 	  || !bfd_generic_link_read_symbols (debug_bfd))
diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index b04c745d4a2..0a8dcd8cc86 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,16 @@
+2016-03-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backport from master
+	2016-01-28  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/19523
+	* Makefile.am (check-DEJAGNU): Pass CC and CC_FOR_BUILD to
+	runtest.
+	* Makefile.in: Regenerated.
+	* testsuite/binutils-all/compress.exp (test_gnu_debuglink): New
+	proc.
+	Run test_gnu_debuglink for native ELF build.
+
 2016-03-09  Nick Clifton  <nickc@redhat.com>
 
 	PR binutils/19775
diff --git a/binutils/Makefile.am b/binutils/Makefile.am
index 17350227b33..4f618cee5ab 100644
--- a/binutils/Makefile.am
+++ b/binutils/Makefile.am
@@ -192,6 +192,7 @@ check-DEJAGNU: site.exp
 	EXPECT=$(EXPECT); export EXPECT; \
 	runtest=$(RUNTEST); \
 	if $(SHELL) -c "$$runtest --version" > /dev/null 2>&1; then \
+	  CC="$(CC)" CC_FOR_BUILD="$(CC_FOR_BUILD)" \
 	  CC_FOR_TARGET="$(CC_FOR_TARGET)" CFLAGS_FOR_TARGET="$(CFLAGS)" \
 		$$runtest --tool $(DEJATOOL) --srcdir $${srcdir}/testsuite \
 			$(RUNTESTFLAGS); \
diff --git a/binutils/Makefile.in b/binutils/Makefile.in
index 5642925a848..eddd6175e83 100644
--- a/binutils/Makefile.in
+++ b/binutils/Makefile.in
@@ -1290,6 +1290,7 @@ check-DEJAGNU: site.exp
 	EXPECT=$(EXPECT); export EXPECT; \
 	runtest=$(RUNTEST); \
 	if $(SHELL) -c "$$runtest --version" > /dev/null 2>&1; then \
+	  CC="$(CC)" CC_FOR_BUILD="$(CC_FOR_BUILD)" \
 	  CC_FOR_TARGET="$(CC_FOR_TARGET)" CFLAGS_FOR_TARGET="$(CFLAGS)" \
 		$$runtest --tool $(DEJATOOL) --srcdir $${srcdir}/testsuite \
 			$(RUNTESTFLAGS); \
diff --git a/binutils/testsuite/binutils-all/compress.exp b/binutils/testsuite/binutils-all/compress.exp
index 4dac503c782..ac24812955c 100644
--- a/binutils/testsuite/binutils-all/compress.exp
+++ b/binutils/testsuite/binutils-all/compress.exp
@@ -667,4 +667,97 @@ if { ([istarget "x86_64-*-elf*"]
 
     set testname "Convert x32 object to x86-64 (3)"
     convert_test "$testname" "--nocompress-debug-sections --x32" "-O elf64-x86-64 --compress-debug-sections=zlib-gnu"
- }
+}
+
+proc test_gnu_debuglink {} {
+    global srcdir
+    global subdir
+    global env
+    global CC_FOR_TARGET
+    global STRIP
+    global OBJCOPY
+    global OBJDUMP
+
+    set test "gnu-debuglink"
+    if {![info exists CC_FOR_TARGET]} {
+	set CC_FOR_TARGET $env(CC)
+    }
+    if { $CC_FOR_TARGET == "" } {
+	unsupported $test
+	return
+    }
+
+    if { [target_compile $srcdir/$subdir/testprog.c tmpdir/testprog exectuable debug] != "" } {
+	fail "$test (build)"
+	return
+    }
+    set got [remote_exec host "$OBJDUMP -S tmpdir/testprog" "" "/dev/null" "tmpdir/testprog.dump"]
+    if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
+	fail "$test (objcopy dump)"
+	return
+    }
+    if { [binutils_run $STRIP "--strip-debug --remove-section=.comment --remove-section=.note tmpdir/testprog -o tmpdir/testprog.strip"] != "" } {
+	fail "$test (strip)"
+	return
+    }
+    if { [binutils_run $OBJCOPY "--only-keep-debug --decompress-debug-sections tmpdir/testprog tmpdir/testprog.decompress"] != "" } {
+	fail "$test (objcopy decompress)"
+	return
+    }
+    if { [binutils_run $OBJCOPY "--only-keep-debug --compress-debug-sections tmpdir/testprog tmpdir/testprog.compress"] != "" } {
+	fail "$test (objcopy compress)"
+	return
+    }
+    if { [binutils_run $OBJCOPY "--add-gnu-debuglink=tmpdir/testprog.decompress tmpdir/testprog.strip tmpdir/testprog"] != "" } {
+	fail "$test (objcopy link decompress)"
+	return
+    }
+    set got [remote_exec host "$OBJDUMP -S tmpdir/testprog" "" "/dev/null" "tmpdir/testprog.decompress.dump"]
+    if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
+	fail "$test (objcopy dump decompress)"
+	return
+    }
+    if { [binutils_run $OBJCOPY "--add-gnu-debuglink=tmpdir/testprog.compress tmpdir/testprog.strip tmpdir/testprog"] != "" } {
+	fail "$test (objcopy link compress)"
+	return
+    }
+    set got [remote_exec host "$OBJDUMP -S tmpdir/testprog" "" "/dev/null" "tmpdir/testprog.compress.dump"]
+    if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
+	fail "$test (objcopy dump compress)"
+	return
+    }
+
+    set src1 tmpdir/testprog.dump
+    set src2 tmpdir/testprog.compress.dump
+    send_log "cmp ${src1} ${src2}\n"
+    verbose "cmp ${src1} ${src2}"
+    set status [remote_exec build cmp "${src1} ${src2}"]
+    set exec_output [lindex $status 1]
+    set exec_output [prune_warnings $exec_output]
+    if ![string match "" $exec_output] then {
+	send_log "$exec_output\n"
+	verbose "$exec_output" 1
+	fail "$test (objdump 1)"
+    } else {
+	pass "$test (objdump 1)"
+    }
+
+    set src1 tmpdir/testprog.decompress.dump
+    set src2 tmpdir/testprog.compress.dump
+    send_log "cmp ${src1} ${src2}\n"
+    verbose "cmp ${src1} ${src2}"
+    set status [remote_exec build cmp "${src1} ${src2}"]
+    set exec_output [lindex $status 1]
+    set exec_output [prune_warnings $exec_output]
+    if ![string match "" $exec_output] then {
+	send_log "$exec_output\n"
+	verbose "$exec_output" 1
+	fail "$test (objdump 2)"
+    } else {
+	pass "$test (objdump 2)"
+    }
+}
+
+if {[isnative] && [is_elf_format]} then {
+    test_gnu_debuglink
+}