[master] 'printf %s\n' is a bad replacement for 'echo'

[Michael Haubenwallner]

Hi Ralf,

again for '$ECHO' and its definition:

I get an unseparated 'sys_lib_search_path_spec' here on AIX with master,
because $ECHO is 'printf %s\n'. Look at this trace snippet, from
$ CONFIG_SHELL=/bin/bash /bin/bash -x ./configure

        + lt_tmp_lt_search_path_spec=' 
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6//. 
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6/../../..//. /lib//. 
/usr/lib//.'
        ++ printf '%s\n' /usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6//. 
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6/../../..//. /lib//. 
/usr/lib//.
        ++ awk '
        BEGIN {RS=" "; FS="/|\n";} {
          lt_foo="";
          lt_count=0;
          for (lt_i = NF; lt_i > 0; lt_i--) {
            if ($lt_i != "" && $lt_i != ".") {
              if ($lt_i == "..") {
                lt_count++;
              } else {
                if (lt_count == 0) {
                  lt_foo="/" $lt_i lt_foo;
                } else {
                  lt_count--;
                }
              }
            }
          }
          if (lt_foo != "") { lt_freq[lt_foo]++; }
          if (lt_freq[lt_foo] == 1) { print lt_foo; }
        }'
        + 
lt_search_path_spec=/usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6/usr/local/lib/lib/usr/lib
        ++ printf '%s\n' 
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6/usr/local/lib/lib/usr/lib
        + 
sys_lib_search_path_spec=/usr/local/lib/gcc-lib/powerpc-ibm-aix5.3.0.0/3.3.6/usr/local/lib/lib/usr/lib

Problem is that the awk script is designed for blank-separated
path-list, not newline-separated one. Compare:
        $ printf '%s\n' a b c
        a
        b
        c
        $ printf '%s\n' "a b c"
        a b c
        $ echo a b c
        a b c

Thanks!

/haubi/