GL_HMAC_FN_PROC    54 maint/gnulib/lib/hmac.c   GL_HMAC_FN_PROC (in, inlen, &hmac_ctx);
GL_HMAC_FN_PROC    71 maint/gnulib/lib/hmac.c       GL_HMAC_FN_PROC (key, keylen, &keyhash);