kc3-lang/automake/t/ltcond2.sh

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• Hash : a1f9336b
  Author :
  Date : 2012-12-18T11:30:39
  

  tests: avoid a spurious failure due to a Clang bug
  
  This version of clang:
  
      clang version 3.2 (trunk 163574)
      Target: powerpc64-unknown-linux-gnu
      Thread model: posix
  
  caused the test 't/ltcond2.sh' to spuriously fail due to what
  appeared like a clang bug.  Here is a part of the diagnostic (trimmed
  down for better clarity):
  
      clang: .../cfarm/llvm/lib/MC/MCAsmStreamer.cpp:338: \
        virtual void {anonymous}::MCAsmStreamer::EmitLabel(llvm::MCSymbol*): \
        Assertion `Symbol->isUndefined() && "Cannot define a symbol twice!"' \
        failed.
      ...
      7  clang  0x0000000012a459c4 llvm::AsmPrinter::EmitGlobalVariable\
        (llvm::GlobalVariable const*) + 18446744073680468044
      8  clang  0x0000000012a490a8 llvm::AsmPrinter::doFinalization\
        (llvm::Module&) + 18446744073680481840
      ...
      Stack dump:
      0.  Program arguments: .../opt/cfarm/clang-2012.09.10/bin/clang \
            -cc1 -triple powerpc64-unknown-linux-gnu -S -disable-free \
            ...
      1.  <eof> parser at end of file
      2.  Code generation
      3.  Running pass 'Function Pass Manager' on module 'hello-generic.c'.
      clang: error: unable to execute command: Aborted
      clang: error: clang frontend command failed due to signal (use -v to \
             see invocation)
      clang version 3.2 (trunk 163574)
      Target: powerpc64-unknown-linux-gnu
      Thread model: posix
  
  So tweak the affected test case to avoid triggering this bug.  This is
  the easiest way for us to keep the testsuite result clean and meaningful
  on our main Clang test bed.
  
  * t/ltcond2.sh: Prefer using "extern const char *" variables rather
  than functions returning a statically allocated "const char *" variable.
  
  Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
  

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• t/ltcond2.sh

• #! /bin/sh
  # Copyright (C) 2003-2012 Free Software Foundation, Inc.
  #
  # 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 2, 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, see <http://www.gnu.org/licenses/>.
  
  # Test for bug in conditionals.
  
  required='cc native libtoolize'
  . test-init.sh
  
  cat >> configure.ac << 'END'
  AC_PROG_CC
  AM_PROG_AR
  AC_PROG_LIBTOOL
  AC_SUBST([HELLO_SYSTEM], [hello-generic.lo])
  AM_CONDITIONAL([LINUX], [true])
  AC_OUTPUT
  END
  
  cat > Makefile.am << 'END'
  lib_LTLIBRARIES = libhello.la
  libhello_la_SOURCES = hello-common.c
  EXTRA_libhello_la_SOURCES = hello-linux.c hello-generic.c
  libhello_la_LIBADD = $(HELLO_SYSTEM)
  libhello_la_DEPENDENCIES = $(HELLO_SYSTEM)
  
  lib_LTLIBRARIES += libhello2.la
  libhello2_la_SOURCES = hello-common.c
  if LINUX
  libhello2_la_SOURCES += hello-linux.c
  else
  libhello2_la_SOURCES += hello-generic.c
  endif
  
  bin_PROGRAMS = hello hello2
  hello_SOURCES = main.c
  hello_LDADD = libhello.la
  hello2_SOURCES = main.c
  hello2_LDADD = libhello2.la
  
  check-local:
  	./hello$(EXEEXT) | grep hello-generic
  	./hello2$(EXEEXT) | grep hello-linux
  	: > check-ok
  END
  
  cat > hello-linux.c <<'END'
  const char* str = "hello-linux";
  END
  
  cat > hello-generic.c <<'END'
  const char* str = "hello-generic";
  END
  
  cat > hello-common.c <<'END'
  #include <stdio.h>
  extern const char* str;
  void print (void)
  {
    puts (str);
  }
  END
  
  cat > main.c <<'END'
  int main (void)
  {
    print();
    return 0;
  }
  END
  
  libtoolize
  $ACLOCAL
  $AUTOCONF
  $AUTOMAKE --add-missing
  ./configure
  $MAKE check
  test -f check-ok
  
  :
  

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