build-ext

#!/usr/bin/env php
<?php

const CONFIG_M4_PATH = './ext/config.m4';

const EXECINFO_MATCH = "PHP_SUBST(TENSOR_SHARED_LIBADD)\n";
const EXECINFO_PATCH = <<<'EOT'

	AC_CANONICAL_BUILD
	if test "$build_os" = linux-musl; then
		CPPFLAGS="${CPPFLAGS:-} -DALPINE_LINUX"
	else
		AC_CHECK_FUNC(backtrace_symbols, have_backtrace_symbols=yes, have_backtrace_symbols=no)
		if test $have_backtrace_symbols = no; then
			LDFLAGS="${LDFLAGS:-} -lexecinfo"
		fi
	fi

EOT
;

chdir(__DIR__);

echo 'Reading config.m4 file... ';

$configM4Contents = file_get_contents(CONFIG_M4_PATH);

if (!$configM4Contents) {
    fwrite(STDERR, "Failed to read the config.m4 file!\n");

    exit(1);
}

echo "done.\n";

echo 'Applying libexec patch... ';

if (strpos($configM4Contents, EXECINFO_MATCH) === false) {
    fwrite(STDERR, "patch entrypoint not found!\n");

    exit(1);
} elseif (strpos($configM4Contents, trim(EXECINFO_PATCH)) !== false) {
    echo "already applied.\n";
} else {
    $configM4Contents = str_replace(EXECINFO_MATCH, EXECINFO_MATCH . EXECINFO_PATCH, $configM4Contents);
    
    echo "done.\n";

    echo 'Saving config.m4 file... ';

    if (!file_put_contents(CONFIG_M4_PATH, $configM4Contents)) {
        fwrite(STDERR, "Failed to write the config.m4 file\n");

        exit(1);
    }

    echo "done.\n";
}