Improve test for working bash and allow path to be specified on command line

configure

@@ -618,8 +618,8 @@ ac_default_prefix=NONE
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 MISSINGBASH
-TESTPROG
 SHELLPROG
+TESTPROG
 LATEX2HTML
 clean_target_vendor
 clean_target_cpu
@@ -830,6 +830,7 @@ enable_native_objc_exceptions
 enable_debug_by_default
 enable_strip_makefiles
 enable_parallel_building
+with_bash_path
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1657,8 +1658,9 @@ Optional Packages:
 
 
 --with-libdir=FILE
-   Set the variant of the /lib directory to use.  This is useful on systems which support
+   Set the variant of the /lib directory to use.  This is useful on systems
-   more than one binary format requiring separate libraries.  The default is lib.
+   which support more than one binary format requiring separate libraries.
+   The default is lib.
    Example: --with-libdir=lib64
 
 
@@ -1718,6 +1720,12 @@ Optional Packages:
   --with-runtime-abi      When using the ng runtime library, allows control
                           over the -fobjc-runtime= flag passed to clang.
 
+--with-bash-path=PATH
+   Set the path to the bash executable to use.  This is useful on systems
+   which do not have a reasonably recent version of bash in their path.
+   Example: --with-bash-path=/opt/homebrew/bin/bash
+
+
 Some influential environment variables:
   CC          C compiler command
   CFLAGS      C compiler flags
@@ -9974,51 +9982,6 @@ done
 #--------------------------------------------------------------------
 # For test framework
 #--------------------------------------------------------------------
-# Extract the first word of "bash", so it can be a program name with args.
-set dummy bash; ac_word=$2
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-printf %s "checking for $ac_word... " >&6; }
-if test ${ac_cv_path_SHELLPROG+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  case $SHELLPROG in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_SHELLPROG="$SHELLPROG" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  case $as_dir in #(((
-    '') as_dir=./ ;;
-    */) ;;
-    *) as_dir=$as_dir/ ;;
-  esac
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
-    ac_cv_path_SHELLPROG="$as_dir$ac_word$ac_exec_ext"
-    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  ;;
-esac
-fi
-SHELLPROG=$ac_cv_path_SHELLPROG
-if test -n "$SHELLPROG"; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SHELLPROG" >&5
-printf "%s\n" "$SHELLPROG" >&6; }
-else
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-fi
-
-
 # Extract the first word of "test", so it can be a program name with args.
 set dummy test; ac_word=$2
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -10064,12 +10027,98 @@ printf "%s\n" "no" >&6; }
 fi
 
 
+
+
+# Check whether --with-bash-path was given.
+if test ${with_bash_path+y}
+then :
+  withval=$with_bash_path; SHELLPROG="$withval"
+else $as_nop
+  SHELLPROG=
+fi
+
+if test x"$SHELLPROG" = x""; then
+  # Extract the first word of "bash", so it can be a program name with args.
+set dummy bash; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_SHELLPROG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  case $SHELLPROG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SHELLPROG="$SHELLPROG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_SHELLPROG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SHELLPROG=$ac_cv_path_SHELLPROG
+if test -n "$SHELLPROG"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SHELLPROG" >&5
+printf "%s\n" "$SHELLPROG" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+else
+  if test ! -x $SHELLPROG
+  then
+    echo "Unable to find executable bash program at $SHELLPROG."
+    SHELLPROG=
+  fi
+fi
 if test x"$SHELLPROG" = x""; then
   echo "Unable to find the bash program (needed for testsuite)."
   SHELLPROG=/bin/sh
   MISSINGBASH=YES
 else
   MISSINGBASH=NO
+  BVER=`$SHELLPROG -c 'echo $BASH_VERSION'`
+  BMAJ=`echo $BVER | sed -e 's/\..*//'`
+  BMIN=`echo $BVER | sed -e 's/^[0-9]\+\.\([0-9]\+\).*/\1/'`
+  if test ${BMAJ} -lt 4
+  then
+    MISSINGBASH=YES
+  else
+    if test ${BMAJ} -eq 4 -a ${BMIN} -lt 3
+    then
+      MISSINGBASH=YES
+    fi
+  fi
+  if test ${MISSINGBASH} = "YES"
+  then
+    echo "The bash progrem version is too old (needed for testsuite)."
+    SHELLPROG=/bin/sh
+  fi
+fi
+if test ${MISSINGBASH} = "YES"
+then
+  echo "Please configure using --with-bash-path= to specify a modernish"
+  echo "bash program (version 4.3 or later)."
+  SHELLPROG=/bin/sh
 fi
 
 

configure.ac

@@ -396,8 +396,9 @@ fi
 AC_MSG_CHECKING([for architecture-specific lib path])
 AC_ARG_WITH(libdir,[
 --with-libdir=FILE
-   Set the variant of the /lib directory to use.  This is useful on systems which support
+   Set the variant of the /lib directory to use.  This is useful on systems
-   more than one binary format requiring separate libraries.  The default is lib.
+   which support more than one binary format requiring separate libraries.
+   The default is lib.
    Example: --with-libdir=lib64
 ],
   LIBDIR="$withval",LIBDIR="lib")
@@ -1778,14 +1779,53 @@ AC_CHECK_PROGS(LATEX2HTML, latex2html)
 #--------------------------------------------------------------------
 # For test framework
 #--------------------------------------------------------------------
-AC_PATH_PROG(SHELLPROG, bash)
 AC_PATH_PROG(TESTPROG, test)
+
+AC_ARG_WITH(bash-path,[
+--with-bash-path=PATH
+   Set the path to the bash executable to use.  This is useful on systems
+   which do not have a reasonably recent version of bash in their path.
+   Example: --with-bash-path=/opt/homebrew/bin/bash
+],
+  SHELLPROG="$withval",SHELLPROG=)
+if test x"$SHELLPROG" = x""; then
+  AC_PATH_PROG(SHELLPROG, bash)
+else
+  if test ! -x $SHELLPROG
+  then
+    echo "Unable to find executable bash program at $SHELLPROG."
+    SHELLPROG=
+  fi
+fi
 if test x"$SHELLPROG" = x""; then
   echo "Unable to find the bash program (needed for testsuite)."
   SHELLPROG=/bin/sh
   MISSINGBASH=YES
 else
   MISSINGBASH=NO
+  BVER=`$SHELLPROG -c 'echo $BASH_VERSION'`
+  BMAJ=`echo $BVER | sed -e 's/\..*//'`
+  BMIN=`echo $BVER | sed -e 's/^[[0-9]]\+\.\([[0-9]]\+\).*/\1/'`
+  if test ${BMAJ} -lt 4
+  then
+    MISSINGBASH=YES
+  else
+    if test ${BMAJ} -eq 4 -a ${BMIN} -lt 3
+    then
+      MISSINGBASH=YES
+    fi
+  fi
+  if test ${MISSINGBASH} = "YES"
+  then
+    echo "The bash progrem version is too old (needed for testsuite)."
+    SHELLPROG=/bin/sh
+  fi
+fi
+if test ${MISSINGBASH} = "YES"
+then
+  echo "Please configure using --with-bash-path= to specify a modernish"
+  echo "bash program (version 4.3 or later)."
+  SHELLPROG=/bin/sh
 fi
 AC_SUBST(MISSINGBASH)