ld/testing: run_dump_test can now check linker mapfiles.

Add a new option 'map' to the ld run_dump_test mechanism.  When the
'map' option is given run_dump_test will ensure that there is a
-Map=MAPFILE present in the linker command line, adding one if needed.

The MAPFILE is then compared with the file passed to the new 'map'
option using the regexp_diff function.  This should make it slightly
easier to write tests that check the linker mapfile output.

The only test I found that already compares mapfile content is updated
to use the new mechanism.

ld/testsuite/ChangeLog:

	* ld-scripts/overlay-size.d: Add 'map' option.
	* ld-scripts/overlay-size.exp: Remove manual check of mapfile.
	* lib/ld-lib.exp (run_dump_test): Add support for new 'map'
	option, checking linker mapfile output.

2 files changed, 1 insertions, 9 deletions

diff --git a/ld/testsuite/ld-scripts/overlay-size.d b/ld/testsuite/ld-scripts/overlay-size.d
index 78a9c92..4e60150 100644
--- a/ld/testsuite/ld-scripts/overlay-size.d
+++ b/ld/testsuite/ld-scripts/overlay-size.d
@@ -1,6 +1,7 @@
 # ld: -T overlay-size.t -Map tmpdir/overlay-size.map
 # name: overlay size
 # objdump: --headers
+# map: overlay-size-map.d
 # xfail: rx-*-*
 #   FAILS on the RX because the linker has to set LMA == VMA for the
 #   Renesas loader.
diff --git a/ld/testsuite/ld-scripts/overlay-size.exp b/ld/testsuite/ld-scripts/overlay-size.exp
index 4dde289..e8e7a91 100644
--- a/ld/testsuite/ld-scripts/overlay-size.exp
+++ b/ld/testsuite/ld-scripts/overlay-size.exp
@@ -23,12 +23,3 @@ if ![is_elf_format] {
 }
 
 run_dump_test overlay-size
-
-set testname "overlay size (map check)"
-
-if [regexp_diff "tmpdir/overlay-size.map" \
-	        "$srcdir/$subdir/overlay-size-map.d"] {
-    fail $testname
-} else {
-    pass $testname
-}