[PATCH] Fix opt-functions.awk in POSIXLY_CORRECT mode (PR other/78766)

[Jakub Jelinek]

Hi!

{ is a special character in ERE, so gawk rightfully complains in
POSIXLY_CORRECT mode.  The regex is meant to look for { at the beginning
of line.  Neither "^\{" nor "^\\{" works though, but "^[{]" does.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?

2016-12-12  Jakub Jelinek  <ja...@redhat.com>

        PR other/78766
        * opt-functions.awk (opt_args): Use [{] instead of { in regexps.

--- gcc/opt-functions.awk.jj    2016-01-04 14:55:50.000000000 +0100
+++ gcc/opt-functions.awk       2016-12-12 09:38:02.229155459 +0100
@@ -61,10 +61,10 @@ function opt_args(name, flags)
        if (flags !~ " " name "\\(")
                return ""
        sub(".* " name "\\(", "", flags)
-       if (flags ~ "^{")
+       if (flags ~ "^[{]")
        {
-               sub ("^{", "", flags)
-               sub("}\\).*", "", flags)
+               sub ("^[{]", "", flags)
+               sub ("}\\).*", "", flags)
        }
        else
                sub("\\).*", "", flags)

        Jakub