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/* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
*
* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://www.wtfpl.net/ for more details.
*/
// gcc -Wall -o gcc-glibmm-abi-check abicheck.c -ldl
// help2man -N -n 'glib gcc4/5 C++11 ABI compatibility test' -o gcc-glibmm-abi-check.1 ./gcc-glibmm-abi-check
#include <stdio.h>
#include <dlfcn.h>
#include <getopt.h>
#ifndef VERSION
#define VERSION "0.1"
#endif
static void print_usage (void) {
printf ("gcc-glibmm-abi-check - gcc4/5 C++11 ABI compatibility test\n\n");
printf ("Usage: gcc-glibmm-abi-check [ OPTIONS ]\n\n");
printf (
"This tool checks for C++ specific symbols in libglimm which are different in\n"
"the gcc4 and gcc5/c++11 ABI in order to determine system-wide use of gcc5.\n"
// TODO document error codes,...
);
printf ("\nOptions:\n"
" -f, --fail fail if system cannot be determined.\n"
" -h, --help Display this help and exit.\n"
" -4, --gcc4 Test succeeds if gcc4 ABI is found.\n"
" -5, --gcc5 Test succeeds if gcc5 ABI is found.\n"
" -g <soname>, --glibmm <soname>\n"
" Specify alternative file for libglibmm-2.4.so\n"
" -v, --verbose Print information.\n"
" -V, --version Print version information and exit.\n"
);
}
static void print_version (void) {
printf ("gcc-glibmm-abi-check version %s\n\n", VERSION);
printf (
"Copyright (C) 2015 Robin Gareus <robin@gareus.org>\n"
"This is free software; see the source for copying conditions. There is NO\n"
"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
}
int main (int argc, char **argv) {
int expect = 0;
int error_fail = 0;
int verbose = 0;
char const * glibmm = "libglibmm-2.4.so.1";
const struct option long_options[] = {
{ "fail", no_argument, 0, 'f' },
{ "help", no_argument, 0, 'h' },
{ "gcc4", no_argument, 0, '4' },
{ "gcc5", no_argument, 0, '5' },
{ "glibmm", required_argument, 0, 'g' },
{ "verbose", no_argument, 0, 'v' },
{ "version", no_argument, 0, 'V' },
};
const char *optstring = "fh45g:vV";
int c;
while ((c = getopt_long (argc, argv, optstring, long_options, NULL)) != -1) {
switch (c) {
case 'f':
error_fail = 1;
break;
case 'h':
print_usage ();
return 0;
break;
case '4':
expect |= 1;
break;
case '5':
expect |= 2;
break;
case 'g':
glibmm = optarg;
break;
case 'v':
verbose = 1;
break;
case 'V':
print_version ();
return 0;
break;
default:
fprintf (stderr, "invalid argument.\n");
print_usage ();
return -1;
break;
}
}
int gcc5 = 0;
int gcc4 = 0;
dlerror (); // reset error
void *h = dlopen (glibmm, RTLD_LAZY);
if (!h) {
if (verbose) {
fprintf (stderr, "Cannot open '%s': %s.\n", glibmm, dlerror ());
}
return error_fail ? 3 : 0;
}
// Glib::ustring::ustring(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
if (dlsym (h, "_ZN4Glib7ustringC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE")) {
gcc5 |= 1;
}
// Glib::ustring::ustring(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
if (dlsym (h, "_ZN4Glib7ustringC1ERKSs")) {
gcc4 |= 1;
}
// Glib::Module::Module(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Glib::ModuleFlags)
if (dlsym (h, "_ZN4Glib6ModuleC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEENS_11ModuleFlagsE")) {
gcc5 |= 2;
}
// Glib::Module::Module(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Glib::ModuleFlags)
if (dlsym (h, "_ZN4Glib6ModuleC1ERKSsNS_11ModuleFlagsE")) {
gcc4 |= 2;
}
// Glib::ustring::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
if (dlsym (h, "_ZN4Glib7ustringaSERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE")) {
gcc5 |= 4;
}
// Glib::ustring::operator=(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
if (dlsym (h, "_ZN4Glib7ustringaSERKSs")) {
gcc4 |= 4;
}
dlclose (h);
if (7 != (gcc4 ^ gcc5)) {
if (verbose) {
fprintf (stderr, "Inconsistent result: gcc4=%x gcc5=%x\n", gcc4, gcc5);
}
}
else if (gcc4 == 7) {
if (verbose) {
printf ("System uses gcc4 c++ ABI\n");
}
if (expect != 0) {
return (expect & 1) ? 0 : 1;
}
}
else if (gcc5 == 7) {
if (verbose) {
printf ("System uses gcc5 c++11 ABI\n");
}
if (expect != 0) {
return (expect & 2) ? 0 : 1;
}
}
else if (verbose) {
fprintf (stderr, "Incomplete result: gcc4=%x gcc5=%x\n", gcc4, gcc5);
}
return error_fail ? 2 : 0;
}
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