Ruby

configure.ac: fix for upcoming autoconf-2.70

The failure initially noticed on autoconf-2.69d (soon to become 2.70):

$ ./configure
./configure: line 8720: syntax error near unexpected token `fi'
./configure: line 8720: `fi'

Before the change generated ./configure snippet looked like:

    if ! $CC -E -xc - <<SRC >/dev/null
then :

        #if defined __APPLE_CC__ && defined __clang_major__ && __clang_major__ < 3
        #error premature clang
        #endif
SRC
        as_fn_error $? "clang version 3.0 or later is required" "$LINENO" 5
fi

Note the newline that breaks here-document syntax.

After the change the snippet does not use here-document.

Signed-off-by: Sergei Trofimovich [email protected]