Snippets for apl 1.9 from Alpine loongarch64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-loongarch64/testing/gnu-apl/gnu-apl-1.9-r0.log.

• Missing_Libraries.cc:98:14: warning: comparing the result of pointer addition '(((const char*)"./configure  \'CXX_WERROR=no\' \'--build=loongarch64-alpine-linux-musl\' \'--host=loongarch64-alpine-linux-musl\' \'--prefix=/usr\' \'--sysconfdir=/etc\' \'--mandir=/usr/share/man\' \'--localstatedir=/var\' \'build_alias=loongarch64-alpine-linux-musl\' \'host_alias=loongarch64-alpine-linux-musl\' \'CC=gcc\' \'CFLAGS=-Os -fstack-clash-protection -Wformat -Werror=format-security\' \'LDFLAGS=-Wl,--as-needed,-O1,--sort-common\' \'CXX=g++\' \'CXXFLAGS=-Os -fstack-clash-protection -Wformat -Werror=format-security -D_GLIBCXX_ASSERTIONS=1 -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS=1 -D_LIBCPP_ENABLE_HARDENED_MODE=1\'") + 24)' and NULL [-Waddress]
     98 |        strstr(cfg_CONFIGURE_ARGS, "=no"))
        |        ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• /usr/include/sys/fcntl.h:1:2: warning: #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h> [-Wcpp]
      1 | #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h>
        |  ^~~~~~~
  

• Prefix.cc:270:24: warning: possibly dangling reference to a temporary [-Wdangling-reference]
    270 |          const Token & tok_var = lookahead().get_token();
        |                        ^~~~~~~
  

• LvalCell.hh:59:27: warning: array subscript 'const LvalCell[0]' is partly outside array bounds of 'const Cell [0]' [-Warray-bounds=]
     59 |       { return value.pval.owner; }
        |                           ^~~~~