Lay groundwork for exec. ext. support

[Tim Van Holder]

I'd like to see this included in 2.51 as groundwork for
a working solution in 2.52.  It should not affect any
existing scripts (I think).

2001-06-18  Tim Van Holder  <address@hidden>

        * acgeneral.m4 (AC_CHECK_PROG, AC_PATH_PROG): Add basic
        support for executable extensions.
        acspecific.m4 (AC_PROG_INSTALL): Ditto.

Index: acgeneral.m4
===================================================================
RCS file: /cvs/autoconf/acgeneral.m4,v
retrieving revision 1.734
diff -u -u -r1.734 acgeneral.m4
--- acgeneral.m4        2001/06/15 17:40:57     1.734
+++ acgeneral.m4        2001/06/18 16:29:57
@@ -2279,15 +2282,18 @@
 m4_ifvaln([$6],
 [  ac_prog_rejected=no])dnl
   AC_SHELL_PATH_WALK([$5],
-[AS_EXECUTABLE_P("$ac_dir/$ac_word") || continue
+[for ac_exec_ext in '' $ac_executable_extensions; do
+  if AS_EXECUTABLE_P("$ac_dir/$ac_word$ac_exec_ext"); then
 m4_ifvaln([$6],
-[if test "$ac_dir/$ac_word" = "$6"; then
-  ac_prog_rejected=yes
-  continue
-fi])dnl
-ac_cv_prog_$1="$3"
-echo "$as_me:__oline__: found $ac_dir/$ac_word" >&AS_MESSAGE_LOG_FD
-break])
+[    if test "$ac_dir/$ac_word$ac_exec_ext" = "$6"; then
+       ac_prog_rejected=yes
+       continue
+     fi])dnl
+    ac_cv_prog_$1="$3"
+    echo "$as_me:__oline__: found $ac_dir/$ac_word$ac_exec_ext"
>&AS_MESSAGE_LOG_FD
+    break 2
+  fi
+done])
 m4_ifvaln([$6],
 [if test $ac_prog_rejected = yes; then
   # We found a bogon in the path, so make sure we never use it.
@@ -2349,11 +2355,13 @@
   ;;
   *)
   AC_SHELL_PATH_WALK([$4],
-[if AS_EXECUTABLE_P("$ac_dir/$ac_word"); then
-   ac_cv_path_$1="$ac_dir/$ac_word"
-   echo "$as_me:__oline__: found $ac_dir/$ac_word" >&AS_MESSAGE_LOG_FD
-   break
-fi])
+[for ac_exec_ext in '' $ac_executable_extensions; do
+  if AS_EXECUTABLE_P("$ac_dir/$ac_word$ac_exec_ext"); then
+    ac_cv_path_$1="$ac_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:__oline__: found $ac_dir/$ac_word$ac_exec_ext"
>&AS_MESSAGE_LOG_FD
+    break 2
+  fi
+done])
 dnl If no 3rd arg is given, leave the cache variable unset,
 dnl so AC_PATH_PROGS will keep looking.
 m4_ifvaln([$3],
Index: acspecific.m4
===================================================================
RCS file: /cvs/autoconf/acspecific.m4,v
retrieving revision 1.342
diff -u -u -r1.342 acspecific.m4
--- acspecific.m4       2001/06/15 17:44:17     1.342
+++ acspecific.m4       2001/06/18 16:26:32
@@ -218,20 +218,22 @@
       # Don't use installbsd from OSF since it installs stuff as root
       # by default.
       for ac_prog in ginstall scoinst install; do
-        if AS_EXECUTABLE_P(["$ac_dir/$ac_prog"]); then
-         if test $ac_prog = install &&
-            grep dspmsg "$ac_dir/$ac_prog" >/dev/null 2>&1; then
-           # AIX install.  It has an incompatible calling convention.
-           :
-         elif test $ac_prog = install &&
-           grep pwplus "$ac_dir/$ac_prog" >/dev/null 2>&1; then
-           # program-specific install script used by HP pwplus--don't use.
-           :
-         else
-           ac_cv_path_install="$ac_dir/$ac_prog -c"
-           break 2
+        for ac_exec_ext in '' $ac_executable_extensions; do
+          if AS_EXECUTABLE_P("$ac_dir/$ac_prog$ac_exec_ext"); then
+           if test $ac_prog = install &&
+              grep dspmsg "$ac_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1;
then
+             # AIX install.  It has an incompatible calling convention.
+             :
+           elif test $ac_prog = install &&
+             grep pwplus "$ac_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+             # program-specific install script used by HP pwplus--don't use.
+             :
+           else
+             ac_cv_path_install="$ac_dir/$ac_prog$ac_exec_ext -c"
+             break 3
+           fi
          fi
-       fi
+        done
       done
       ;;
     esac