[gdb/testsuite] Use find_gnatmake instead of gdb_find_gnatmake

On SLE-11, with an older dejagnu version, I ran into:
...
Running gdb.ada/mi_prot.exp ...
UNRESOLVED: gdb.ada/mi_prot.exp: \
  testcase aborted due to invalid command name: gdb_find_gnatmake
ERROR: tcl error sourcing gdb.ada/mi_prot.exp.
ERROR: invalid command name "gdb_find_gnatmake"
    while executing
"::gdb_tcl_unknown gdb_find_gnatmake"
    ("uplevel" body line 1)
    invoked from within
"uplevel 1 ::gdb_tcl_unknown $args"
    (procedure "::unknown" line 5)
    invoked from within
"gdb_find_gnatmake"
    (procedure "gnatmake_version_at_least" line 2)
    invoked from within
...

Proc gdb_find_gnatmake is actually a backup for find_gnatmake:
...
if {[info procs find_gnatmake] == ""} {
    rename gdb_find_gnatmake find_gnatmake
...
so gnatmake_version_at_least should use find_gnatmake instead.

For a recent dejagnu with find_gnatmake, gdb_find_gnatmake is kept, and we
don't run into this error.

For an older dejagnu without find_gnatmake, gdb_find_gnatmake is renamed to
find_gnatmake, and we do run into the error.

It's confusing that we're using the gdb_ prefix for gdb_find_gnatmake, it
seems something legitimate to use.  Maybe we should use future_ or gdb_future_
prefix instead to make this more clear, but I've left that alone for now.

Fix this by:
- triggering the same error with a recent dejagnu by removing
  gdb_find_gnatmake unless used (and likewise for other procs in future.exp),
  and
- using find_gnatmake in gnatmake_version_at_least.

Tested on x86_64-linux.

Approved-By: Tom Tromey <tom@tromey.com>

PR testsuite/31647
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31647

2 files changed, 16 insertions, 1 deletions

diff --git a/gdb/testsuite/lib/ada.exp b/gdb/testsuite/lib/ada.exp
index 558e73f..1bc0dc1 100644
--- a/gdb/testsuite/lib/ada.exp
+++ b/gdb/testsuite/lib/ada.exp
@@ -151,7 +151,7 @@ proc find_ada_tool {tool} {
 # Return 1 if gnatmake is at least version $MAJOR.x.x
 
 proc gnatmake_version_at_least { major } {
-    set gnatmake [gdb_find_gnatmake]
+    set gnatmake [find_gnatmake]
     set gnatmake [lindex [split $gnatmake] 0]
     if {[catch {exec $gnatmake --version} output]} {
 	return 0
diff --git a/gdb/testsuite/lib/future.exp b/gdb/testsuite/lib/future.exp
index 3512fad..62913cb 100644
--- a/gdb/testsuite/lib/future.exp
+++ b/gdb/testsuite/lib/future.exp
@@ -694,12 +694,16 @@ if {[info procs find_gnatmake] == ""} {
     rename gdb_find_gnatmake find_gnatmake
     set use_gdb_compile(ada) 1
     gdb_note [join [list $note_prefix "Ada" $note_suffix] ""]
+} else {
+    rename gdb_find_gnatmake ""
 }
 
 if {[info procs find_gfortran] == ""} {
     rename gdb_find_gfortran find_gfortran
     set use_gdb_compile(fortran) 1
     gdb_note [join [list $note_prefix "Fortran" $note_suffix] ""]
+} else {
+    rename gdb_find_gfortran ""
 }
 
 if {[info procs find_go_linker] == ""} {
@@ -707,24 +711,33 @@ if {[info procs find_go_linker] == ""} {
     rename gdb_find_go_linker find_go_linker
     set use_gdb_compile(go) 1
     gdb_note [join [list $note_prefix "Go" $note_suffix] ""]
+} else {
+    rename gdb_find_go ""
+    rename gdb_find_go_linker ""
 }
 
 if {[info procs find_gdc] == ""} {
     rename gdb_find_gdc find_gdc
     set use_gdb_compile(d) 1
     gdb_note [join [list $note_prefix "D" $note_suffix] ""]
+} else {
+    rename gdb_find_gdc ""
 }
 
 if {[info procs find_rustc] == ""} {
     rename gdb_find_rustc find_rustc
     set use_gdb_compile(rust) 1
     gdb_note [join [list $note_prefix "Rust" $note_suffix] ""]
+} else {
+    rename gdb_find_rustc ""
 }
 
 if {[info procs find_hipcc] == ""} {
     rename gdb_find_hipcc find_hipcc
     set use_gdb_compile(hip) 1
     gdb_note [join [list $note_prefix "HIP" $note_suffix] ""]
+} else {
+    rename gdb_find_hipcc ""
 }
 
 # If dejagnu's default_target_compile is missing support for any language,
@@ -732,6 +745,8 @@ if {[info procs find_hipcc] == ""} {
 if { [array size use_gdb_compile] != 0 } {
     catch {rename default_target_compile dejagnu_default_target_compile}
     rename gdb_default_target_compile default_target_compile
+} else {
+    rename gdb_default_target_compile ""
 }