1 /* Copyright © 2013, Intel Corporation
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 /* The purpose of this program is very simple. It dynamically loads
28 * libGL.so.1 and then prints out the filename of the file which was
31 * We use this in Glaze in order to determine the libGL.so.1 library
32 * that would be loaded if it weren't for us messing around with
33 * LD_LIBRARY_PATH causing Glaze's libGL.so.1 to be loaded instead.
35 * Using a program like this allows us to directly inspect what the
36 * dynamic loader actually does. This is much more reliable than
37 * trying to recreate its search-path logic which would requrie at
40 * * Parsing LD_LIBRARY_PATH
42 * * Correctly interpreting $LIB within LD_LIBRARY_PATH
44 * * Knowing the canonical name for the current architecture for
47 * * Parsing /etc/ld.so.conf entries
58 handle = dlopen ("libGL.so.1", RTLD_NOW);
60 fprintf (stderr, "glaze-find-libgl: Failed to dlopen libGL.so.1\n");
64 function = dlsym (handle, "glClear");
65 if (function == NULL) {
66 fprintf (stderr, "glaze-find-libgl: Failed to dlsym glClear\n");
70 if (dladdr (function, &info) == 0) {
71 fprintf (stderr, "glaze-find-libgl: Failed to dladdr glClear\n");
75 printf ("%s\n", info.dli_fname);