[gcc r14-9988] build: Don't check for host-prefixed 'cargo' program

[gcc r14-9988] build: Don't check for host-prefixed 'cargo' program

[Thomas Schwinge]

https://gcc.gnu.org/g:3ebc7898a55988e84ab3625700a827e3e82b016f

commit r14-9988-g3ebc7898a55988e84ab3625700a827e3e82b016f
Author: Thomas Schwinge <tschwinge@baylibre.com>
Date:   Mon Apr 15 13:33:48 2024 +0200

    build: Don't check for host-prefixed 'cargo' program
    
    Follow-up to commit 3e1e73fc99584440e5967577f2049573eeaf4596
    "build: Check for cargo when building rust language":
    
    On 2024-04-15T13:14:42+0200, I wrote:
    > I now wonder: instead of 'AC_CHECK_TOOL', shouldn't this use
    > 'AC_CHECK_PROG'?  (We always want plain 'cargo', not host-prefixed
    > 'aarch64-linux-gnu-cargo' etc., right?)  I'll look into changing this.
    
            * configure: Regenerate.
            config/
            * acx.m4 (ACX_PROG_CARGO): Use 'AC_CHECK_PROGS'.

Diff:
---
 config/acx.m4 |  3 +--
 configure     | 64 +++++++----------------------------------------------------
 2 files changed, 8 insertions(+), 59 deletions(-)

diff --git a/config/acx.m4 b/config/acx.m4
index 3c5fe67342e..c45e55e7f51 100644
--- a/config/acx.m4
+++ b/config/acx.m4
@@ -427,8 +427,7 @@ fi
 # Test for Rust
 # We require cargo and rustc for some parts of the rust compiler.
 AC_DEFUN([ACX_PROG_CARGO],
-[AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
-AC_CHECK_TOOL(CARGO, cargo, no)
+[AC_CHECK_PROGS(CARGO, cargo, no)
 if test "x$CARGO" != xno; then
   have_cargo=yes
 else
diff --git a/configure b/configure
index 705fc6b19e2..1a5513ce061 100755
--- a/configure
+++ b/configure
@@ -5787,10 +5787,10 @@ else
   have_gdc=no
 fi
 
-
-if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}cargo", so it can be a program name with args.
-set dummy ${ac_tool_prefix}cargo; ac_word=$2
+for ac_prog in cargo
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_CARGO+:} false; then :
@@ -5806,7 +5806,7 @@ do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_CARGO="${ac_tool_prefix}cargo"
+    ac_cv_prog_CARGO="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -5826,59 +5826,9 @@ $as_echo "no" >&6; }
 fi
 
 
-fi
-if test -z "$ac_cv_prog_CARGO"; then
-  ac_ct_CARGO=$CARGO
-  # Extract the first word of "cargo", so it can be a program name with args.
-set dummy cargo; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CARGO+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_CARGO"; then
-  ac_cv_prog_ac_ct_CARGO="$ac_ct_CARGO" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_CARGO="cargo"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
+  test -n "$CARGO" && break
 done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_CARGO=$ac_cv_prog_ac_ct_CARGO
-if test -n "$ac_ct_CARGO"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CARGO" >&5
-$as_echo "$ac_ct_CARGO" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-  if test "x$ac_ct_CARGO" = x; then
-    CARGO="no"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    CARGO=$ac_ct_CARGO
-  fi
-else
-  CARGO="$ac_cv_prog_CARGO"
-fi
+test -n "$CARGO" || CARGO="no"
 
 if test "x$CARGO" != xno; then
   have_cargo=yes