view auto/endianness @ 8109:2ffefe2f892e

Removed casts from ngx_memcmp() macro. Casts are believed to be not needed, since memcmp() has "const void *" arguments since introduction of the "void" type in C89. And on pre-C89 platforms nginx is unlikely to compile without warnings anyway, as there are no casts in memcpy() and memmove() calls. These casts were added in 1648:89a47f19b9ec without any details on why they were added, and Igor does not remember details either. The most plausible explanation is that they were copied from ngx_strcmp() and were not really needed even at that time. Prodded by Alejandro Colomar.
author Maxim Dounin <mdounin@mdounin.ru>
date Wed, 30 Nov 2022 18:01:53 +0300
parents e3faa5fb7772
children
line wrap: on
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


echo $ngx_n "checking for system byte ordering ...$ngx_c"

cat << END >> $NGX_AUTOCONF_ERR

----------------------------------------
checking for system byte ordering

END


cat << END > $NGX_AUTOTEST.c

int main(void) {
    int i = 0x11223344;
    char *p;

    p = (char *) &i;
    if (*p == 0x44) return 0;
    return 1;
}

END

ngx_test="$CC $CC_TEST_FLAGS $CC_AUX_FLAGS \
          -o $NGX_AUTOTEST $NGX_AUTOTEST.c $NGX_LD_OPT $ngx_feature_libs"

eval "$ngx_test >> $NGX_AUTOCONF_ERR 2>&1"

if [ -x $NGX_AUTOTEST ]; then
    if $NGX_AUTOTEST >/dev/null 2>&1; then
        echo " little endian"
        have=NGX_HAVE_LITTLE_ENDIAN . auto/have
    else
        echo " big endian"
    fi

    rm -rf $NGX_AUTOTEST*

else
    rm -rf $NGX_AUTOTEST*

    echo
    echo "$0: error: cannot detect system byte ordering"
    exit 1
fi