[PATCH][gdb/testsuite] Require gnatmake 8 for gdb.ada/rename_subscript_param.exp

[Tom de Vries <tdevries@suse.de>]

Hi,

When running gdb.ada/rename_subscript_param.exp with gnatmake 7.4.1, we get:
...
FAIL: gdb.ada/rename_subscript_param.exp: print rename_subscript_param_b \
  before changing its value
FAIL: gdb.ada/rename_subscript_param.exp: print rename_subscript_param_b \
  after changing its value
...

The commit last touching the test-case (afcfda091e) states:
...
    The test still fails with old compilers that do not properly
    generate debug info for this renaming:
...

Fix this by requiring at least gnatmake 8 for the test-case.

Tested on x86_64-linux.

OK for trunk?

Thanks,
- Tom

[gdb/testsuite] Require gnatmake 8 for gdb.ada/rename_subscript_param.exp

gdb/testsuite/ChangeLog:

2019-08-29  Tom de Vries  <tdevries@suse.de>

	PR teststuite/24599
	* gdb.ada/rename_subscript_param.exp: Require gnatmake 8.
	* lib/ada.exp (gnatmake_version_at_least): New proc.

---
 gdb/testsuite/gdb.ada/rename_subscript_param.exp |  4 ++++
 gdb/testsuite/lib/ada.exp                        | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/gdb/testsuite/gdb.ada/rename_subscript_param.exp b/gdb/testsuite/gdb.ada/rename_subscript_param.exp
index ffcfa50df3..fd8208825a 100644
--- a/gdb/testsuite/gdb.ada/rename_subscript_param.exp
+++ b/gdb/testsuite/gdb.ada/rename_subscript_param.exp
@@ -15,6 +15,10 @@
 
 load_lib "ada.exp"
 
+if { ![gnatmake_version_at_least 8] } {
+    return -1
+}
+
 standard_ada_testfile pb30_012
 
 if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug]] != "" } {
diff --git a/gdb/testsuite/lib/ada.exp b/gdb/testsuite/lib/ada.exp
index 1345c747c5..95f0f525b1 100644
--- a/gdb/testsuite/lib/ada.exp
+++ b/gdb/testsuite/lib/ada.exp
@@ -105,3 +105,22 @@ proc find_ada_tool {tool} {
 
     return $result
 }
+
+# Return 1 if gnatmake is at least version $MAJOR.x.x
+
+proc gnatmake_version_at_least { major } {
+    set gnatmake [gdb_find_gnatmake]
+    set gnatmake [lindex [split $gnatmake] 0]
+    set output [exec $gnatmake --version]
+    if { [regexp {GNATMAKE ([^ .]+).([^ .]+).([^ .]+)} $output \
+	      match gnatmake_major gnatmake_minor gnatmake_micro] } {
+	if { $gnatmake_major >= $major } {
+	    return 1
+	} else {
+	    return 0
+	}
+    }
+
+    # Unknown, return 1
+    return 1
+}