X-Git-Url: https://oss.titaniummirror.com/gitweb?p=msp430-binutils.git;a=blobdiff_plain;f=gold%2Ftestsuite%2Fweak_undef_file1.cc;fp=gold%2Ftestsuite%2Fweak_undef_file1.cc;h=743eea641e843bfd077f44df6fcc4099d0f02f69;hp=0000000000000000000000000000000000000000;hb=d5da4f291af551c0b8b79e1d4a9b173d60e5c10e;hpb=7b5ea4fcdf2819e070665ab5610f8b48e3867c10 diff --git a/gold/testsuite/weak_undef_file1.cc b/gold/testsuite/weak_undef_file1.cc new file mode 100644 index 0000000..743eea6 --- /dev/null +++ b/gold/testsuite/weak_undef_file1.cc @@ -0,0 +1,69 @@ +// weak_undef_file1.cc -- test handling of weak undefined symbols for gold + +// Copyright 2008 Free Software Foundation, Inc. +// Written by Cary Coutant . + +// This file is part of gold. + +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 3 of the License, or +// (at your option) any later version. + +// This program 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 General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, +// MA 02110-1301, USA. + +// We test that we correctly deal with weak undefined symbols. +// We need to make sure that the symbol is resolved to zero +// by the linker and that no dynamic relocation is generated. + +// This source is used to build a shared library that defines +// an arbitrary symbol other than the weak undefined symbol +// referenced by the main program. The main program will be +// linked with this library so that the symbol remains undefined. +// Through the use of the embedded RPATH, the program will load +// an alternate shared library that does define the symbol, +// so that we can detect whether the symbol was left for runtime +// resolution. + + +#include + +#include "weak_undef.h" + +int is_such_symbol_ = 1; + +extern int v2 __attribute__ ((weak)); + +int *v3 = &v2; + +int +t1() +{ + return is_such_symbol_; +} + +// Test that a weak reference from a shared library to a symbol +// defined in the main program does get resolved. + +int +t2() +{ + return (&v2 == NULL) ? -1 : v2; +} + +// Test that a weak reference from a shared library to a symbol +// defined in the main program does get resolved. + +int +t3() +{ + return (v3 == NULL) ? -1 : *v3; +}