* c-typeck.c (common_type): Correct comment.

[pf3gnuchains/gcc-fork.git] / gcc / opts.sh

diff --git a/gcc/opts.sh b/gcc/opts.sh
index 985cf96..871c855 100644 (file)
--- a/gcc/opts.sh
+++ b/gcc/opts.sh
@@ -17,7 +17,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 #
-# Usage: opts.sh outfile.c outfile.h file1.opt [file2.opt, ...]
+# Usage: opts.sh moveifchange srcdir outfile.c outfile.h file1.opt [ ...]
 
 # Always operate in the C locale.
 LANG=C
@@ -30,8 +30,11 @@ AWK=${AWK-awk}
 
 SORT=sort              # Could be /bin/sort or /usr/bin/sort
 
+MOVEIFCHANGE=$1; shift
 C_FILE=$1; shift
 H_FILE=$1; shift
+TMP_C_FILE=tmp-${C_FILE}
+TMP_H_FILE=tmp-${H_FILE}
 
 ${AWK} '
        # Ignore comments and blank lines
@@ -39,7 +42,7 @@ ${AWK} '
        # Note that RS="" falls foul of gawk 3.1.2 bugs
        /^[^ \t]/       { record = $0
                          do { getline tmp;
-                              if (tmp != "" )
+                              if (!(tmp ~ "^[ \t]*(;|$)"))
                                  record = record "\034" tmp
                          } while (tmp != "")
                          print record
@@ -62,6 +65,7 @@ ${AWK} '
         if (flags ~ " Separate ") result = result " | CL_SEPARATE"
         if (flags ~ " RejectNegative ") result = result " | CL_REJECT_NEGATIVE"
         if (flags ~ " UInteger ") result = result " | CL_UINTEGER"
+        if (flags ~ " Undocumented ") result = result " | CL_UNDOCUMENTED"
        sub( "^0 \\| ", "", result )
        return result
     }
@@ -88,13 +92,14 @@ ${AWK} '
 # Dump out an enumeration into a .h file, and an array of options into a
 # C file.  Combine the flags of duplicate options.
     END {
-       c_file = "'${C_FILE}'"
-       h_file = "'${H_FILE}'"
+       c_file = "'${TMP_C_FILE}'"
+       h_file = "'${TMP_H_FILE}'"
+       realh_file = "'${H_FILE}'"
        comma = ","
 
        print "/* This file is auto-generated by opts.sh.  */\n" > c_file
        print "#include <intl.h>"                       >> c_file
-       print "#include \"" h_file "\""                 >> c_file
+       print "#include \"" realh_file "\""             >> c_file
        print "#include \"opts.h\"\n"                   >> c_file
        print "const char * const lang_names[] =\n{"    >> c_file
 
@@ -163,3 +168,8 @@ ${AWK} '
        print "};"                                      >> c_file
     }
 '
+
+# Copy the newly generated files back to the correct names only if different.
+# This is to prevent a cascade of file rebuilds when not necessary.
+${MOVEIFCHANGE} ${TMP_H_FILE} ${H_FILE}
+${MOVEIFCHANGE} ${TMP_C_FILE} ${C_FILE}