lib/gc-pbkdf2-sha1.c: Remove comments from RFC 2898.

[gnulib.git] / build-aux / bootstrap

diff --git a/build-aux/bootstrap b/build-aux/bootstrap
index 1e7bfac..48cc10e 100755 (executable)
--- a/build-aux/bootstrap
+++ b/build-aux/bootstrap
@@ -34,7 +34,7 @@ bt_regex=`echo "$bt"| sed 's/\./[.]/g'`
 bt2=${bt}2
 
 usage() {
-  echo >&2 "\
+  cat <<EOF
 Usage: $0 [OPTION]...
 Bootstrap this package from the checked-out sources.
 
@@ -56,7 +56,7 @@ For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
 are honored.
 
 Running without arguments will suffice in most cases.
-"
+EOF
 }
 
 # Configuration.
@@ -148,6 +148,45 @@ copy=false
 # on which version control system (if any) is used in the source directory.
 vc_ignore=auto
 
+# find_tool ENVVAR NAMES...
+# -------------------------
+# Search for a required program.  Use the value of ENVVAR, if set,
+# otherwise find the first of the NAMES that can be run (i.e.,
+# supports --version).  If found, set ENVVAR to the program name,
+# die otherwise.
+find_tool ()
+{
+  # Find sha1sum, named gsha1sum on MacPorts.
+  find_tool_envvar=$1
+  shift
+  find_tool_names=$@
+  eval "find_tool_res=\$$find_tool_envvar"
+  if test x"$find_tool_res" = x; then
+    for i
+    do
+      if ($i --version </dev/null) >/dev/null 2>&1; then
+       find_tool_res=$i
+       break
+      fi
+    done
+  else
+    find_tool_error_prefix="\$$find_tool_envvar: "
+  fi
+  if test x"$find_tool_res" = x; then
+    echo >&2 "$0: one of these is required: $find_tool_names"
+    exit 1
+  fi
+  ($find_tool_res --version </dev/null) >/dev/null 2>&1 || {
+    echo >&2 "$0: ${find_tool_error_prefix}cannot run $find_tool_res --version"
+    exit 1
+  }
+  eval "$find_tool_envvar=\$find_tool_res"
+  eval "export $find_tool_envvar"
+}
+
+# Find sha1sum, named gsha1sum on MacPorts.
+find_tool SHA1SUM sha1sum gsha1sum
+
 # Override the default configuration, if necessary.
 # Make sure that bootstrap.conf is sourced from the current directory
 # if we were invoked as "sh bootstrap".
@@ -420,11 +459,11 @@ update_po_files() {
     cksum_file="$ref_po_dir/$po.s1"
     if ! test -f "$cksum_file" ||
         ! test -f "$po_dir/$po.po" ||
-        ! ${SHA1SUM-sha1sum} -c --status "$cksum_file" \
+        ! $SHA1SUM -c --status "$cksum_file" \
             < "$new_po" > /dev/null; then
       echo "updated $po_dir/$po.po..."
       cp "$new_po" "$po_dir/$po.po" \
-          && ${SHA1SUM-sha1sum} < "$new_po" > "$cksum_file"
+          && $SHA1SUM < "$new_po" > "$cksum_file"
     fi
   done
 }
@@ -689,6 +728,10 @@ find "$m4_base" "$source_base" \
 
 # Reconfigure, getting other files.
 
+# Skip autoheader if it's not needed.
+grep -E '^[     ]*AC_CONFIG_HEADERS?\>' configure.ac >/dev/null ||
+  AUTOHEADER=true
+
 for command in \
   libtool \
   "${ACLOCAL-aclocal} --force -I m4" \