glibc/elf/tst-globalmod2.c
H.J. Lu 114d07fd9a Add and use link-test-modules-rpath-link [BZ #28455]
DT_RUNPATH is only used to find the immediate dependencies of the
executable or shared object containing the DT_RUNPATH entry:

1. Define link-test-modules-rpath-link if $(build-hardcoded-path-in-tests)
is yes.
2. Use $(link-test-modules-rpath-link) in build-module-helper so that
test modules can dlopen modules with DT_RUNPATH.
3. Add a test to show why link-test-modules-rpath-link is needed.

This partially fixes BZ #28455.
2022-01-24 05:11:36 -08:00

42 lines
1.4 KiB
C

/* Test BZ #28455.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* In glibc configured with --enable-hardcoded-path-in-tests, a test
program built with -Wl,--enable-new-dtags, which adds DT_RUNPATH,
instead of DT_RPATH, can call a function in a shared library, which
dlopens another shared library. */
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>
extern int test (void);
int
test (void)
{
(void) dlopen ("reldepmod4.so", RTLD_LAZY | RTLD_GLOBAL);
if (dlsym (RTLD_DEFAULT, "call_me") != NULL)
{
puts ("found \"call_me\"");
return EXIT_SUCCESS;
}
puts ("didn't find \"call_me\"");
return EXIT_FAILURE;
}