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new tool to test gcc4/5 ABI

This commit is contained in:
Robin Gareus 2015-09-26 18:23:19 +02:00
parent 9a47744fc0
commit ba6e274efa
5 changed files with 243 additions and 0 deletions

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CFLAGS = -Wall
LOADLIBES = -ldl
gcc-glibmm-abi-check:
$(CC) $(CPPFLAGS) $(CFLAGS) \
-o gcc-glibmm-abi-check \
abicheck.c \
$(LDFLAGS) $(LOADLIBES)
check: gcc-glibmm-abi-check
./gcc-glibmm-abi-check
gcc-glibmm-abi-check.1: gcc-glibmm-abi-check
help2man -N \
-n 'glib gcc4/5 C++11 ABI compatibility test' \
-o gcc-glibmm-abi-check.1 \
./gcc-glibmm-abi-check
.PHONY: check

34
tools/gccabicheck/README Normal file
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g++5 ABI test tool
==================
This is a simple tool to test a system for g++5's glibmm at runtime.
GCC5.1 introduced a new ABI for the C++ standard library.
The old 3.4 .. 5.0 ABI is not compatible. By default gcc provides a
dual ABI, so testing libstc++ itself is not sufficient.
Some GNU/Linux distributions systems switched to the new ABI already
and compile *plugins* with the new gcc.
If a plugin uses a c++ library that is also shipped with ardour-bundles,
the ABI of that library must match. Currently known cases: gtkmm, glibmm.
e.g. Ingen or eq10q provided by a distro compiled with gcc5 will not
load in Ardour from ardour.org compiled with gcc4 because ardour
ships an incompatible gtkmm, glibmm, cairomm, ...
Likewise Ardour gcc5-compiled binaries will fail to load plugins that
are compiled with gcc4.
This simiple tool `gcc-glibmm-abi-check` checks for gcc4/gcc5 specific
symbols in libglibmm (a common denominator C++ lib), it is intended
to be run when deploying ardour binaries.
References
----------
https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html
https://wiki.debian.org/GCC5
https://mail.gnome.org/archives/gtkmm-list/2015-June/thread.html

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// 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) GPL 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 *glibmm = "libglibmm-2.4.so";
const struct option long_options[] = {
{ "help", no_argument, 0, 'h' },
{ "gcc4", no_argument, 0, '4' },
{ "gcc5", no_argument, 0, '5' },
{ "glibmm", required_argument, 0, 'g' },
{ "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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tools/gccabicheck/wscript Normal file
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#!/usr/bin/env python
from waflib.extras import autowaf as autowaf
from waflib import Options
import os
# Mandatory variables
top = '.'
out = 'build'
def options(opt):
autowaf.set_options(opt)
def configure(conf):
conf.load('compiler_c')
autowaf.configure(conf)
def build(bld):
obj = bld(features = 'c cprogram')
obj.source = [ 'abicheck.c' ]
obj.target = 'gcc-glibmm-abi-check'
obj.name = 'gcc-glibmm-abi-check'
obj.lib = 'dl'

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@ -1070,6 +1070,7 @@ int main () { int x = SFC_AUTO_DOWNGRADE_RF64; return 0; }
sub_config_and_use(conf, 'libs/appleutility')
elif Options.options.dist_target != 'mingw':
sub_config_and_use(conf, 'tools/sanity_check')
sub_config_and_use(conf, 'tools/gccabicheck')
sub_config_and_use(conf, 'libs/clearlooks-newer')
@ -1185,6 +1186,7 @@ def build(bld):
bld.recurse('libs/appleutility')
elif bld.env['build_target'] != 'mingw':
bld.recurse('tools/sanity_check')
bld.recurse('tools/gccabicheck')
bld.recurse('libs/clearlooks-newer')