* m4/shell.m4 (AC_PROG_SHELL): Check for old-fashioned shells that

don't allow "(" in front of case labels.  Problem reported by midair
in <http://lists.gnu.org/archive/html/bug-gzip/2007-04/msg00004.html>.
Also, check for buggy shells that require ";;" before "esac".

diff --git a/ChangeLog b/ChangeLog
index c20f14537818351a838381722e936cbb92415808..4f2ea421522e3ef2b3f89ed090a4f1332f9dd812 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2007-04-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+       * m4/shell.m4 (AC_PROG_SHELL): Check for old-fashioned shells that
+       don't allow "(" in front of case labels.  Problem reported by midair
+       in <http://lists.gnu.org/archive/html/bug-gzip/2007-04/msg00004.html>.
+       Also, check for buggy shells that require ";;" before "esac".
+
 2007-04-13  Paul Eggert  <eggert@cs.ucla.edu>
 
        * NEWS: Version 1.3.12 released.

diff --git a/m4/shell.m4 b/m4/shell.m4
index abdd2ba4f6bb0c040ee236521647f510aa233fbc..921ea0d8533ec2e2317f5bc4c2b2c115d615faa3 100644 (file)
--- a/m4/shell.m4
+++ b/m4/shell.m4
@@ -37,15 +37,15 @@ AC_DEFUN([AC_PROG_SHELL],
       ac_cv_path_shell=no
 
       case $SHELL in
-      /*)
+      (/*)
        rm -f conftest.c
        if ("$SHELL" -c "$ac_command") 2>/dev/null; then
          ac_cv_path_shell=$SHELL
-       fi;;
+       fi
       esac
 
       case $ac_cv_path_shell in
-      no)
+      (no)
        # Prefer shells that are more likely to be installed in the
        # same place on all hosts of this platform.  Therefore, prefer
        # shells in /bin and /usr/bin to shells in the installer's
@@ -57,7 +57,7 @@ AC_DEFUN([AC_PROG_SHELL],
        do
          IFS=$as_save_IFS
          case $as_dir in
-         /*)
+         (/*)
            for ac_base in sh bash ksh sh5; do
              rm -f conftest.c
              if ("$as_dir/$ac_base" -c "$ac_command") 2>/dev/null; then
@@ -66,11 +66,11 @@ AC_DEFUN([AC_PROG_SHELL],
              fi
            done
            case $ac_cv_path_shell in
-           /*) break;;
-           esac;;
+           (/*) break
+           esac
          esac
        done
-       rm -f conftest.c;;
+       rm -f conftest.c
       esac])
    AC_MSG_RESULT($ac_cv_path_shell)
    SHELL=$ac_cv_path_shell