make/autoconf/lib-std.m4
author goetz
Mon, 25 Sep 2017 23:42:58 -0400
changeset 47264 8b5ed0358b3a
parent 47216 71c04702a3d5
child 47687 fb290fd1f9d4
permissions -rw-r--r--
8187045: [linux] Not all libraries in the VM are linked with -z,noexecstack Reviewed-by: ihse, dholmes
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#
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# Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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#
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# This code is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 only, as
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# published by the Free Software Foundation.  Oracle designates this
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# particular file as subject to the "Classpath" exception as provided
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# by Oracle in the LICENSE file that accompanied this code.
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#
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# This code is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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# version 2 for more details (a copy is included in the LICENSE file that
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# accompanied this code).
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#
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# You should have received a copy of the GNU General Public License version
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# 2 along with this work; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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# or visit www.oracle.com if you need additional information or have any
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# questions.
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#
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################################################################################
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# Setup the standard C/C++ runtime libraries.
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#
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# Most importantly, determine if stdc++ should be linked statically or
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# dynamically.
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################################################################################
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AC_DEFUN_ONCE([LIB_SETUP_STD_LIBS],
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[
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  # statically link libstdc++ before C++ ABI is stablized on Linux unless
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  # dynamic build is configured on command line.
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  AC_ARG_WITH([stdc++lib], [AS_HELP_STRING([--with-stdc++lib=<static>,<dynamic>,<default>],
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      [force linking of the C++ runtime on Linux to either static or dynamic, default is static with dynamic as fallback])],
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      [
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        if test "x$with_stdc__lib" != xdynamic && test "x$with_stdc__lib" != xstatic \
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                && test "x$with_stdc__lib" != xdefault; then
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          AC_MSG_ERROR([Bad parameter value --with-stdc++lib=$with_stdc__lib!])
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        fi
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      ],
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      [with_stdc__lib=default]
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  )
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  if test "x$OPENJDK_TARGET_OS" = xlinux; then
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    # Test if stdc++ can be linked statically.
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    AC_MSG_CHECKING([if static link of stdc++ is possible])
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    STATIC_STDCXX_FLAGS="-static-libstdc++ -static-libgcc"
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    AC_LANG_PUSH(C++)
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    OLD_LIBS="$LIBS"
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    LIBS="$STATIC_STDCXX_FLAGS"
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    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
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        [has_static_libstdcxx=yes],
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        [has_static_libstdcxx=no])
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    LIBS="$OLD_LIBS"
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    AC_LANG_POP(C++)
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    AC_MSG_RESULT([$has_static_libstdcxx])
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    if test "x$with_stdc__lib" = xstatic && test "x$has_static_libstdcxx" = xno; then
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      AC_MSG_ERROR([Static linking of libstdc++ was not possible!])
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    fi
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    # If dynamic was requested, it's available since it would fail above otherwise.
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    # If dynamic wasn't requested, go with static unless it isn't available.
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    AC_MSG_CHECKING([how to link with libstdc++])
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    if test "x$with_stdc__lib" = xdynamic || test "x$has_static_libstdcxx" = xno \
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        || HOTSPOT_CHECK_JVM_VARIANT(zeroshark); then
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      AC_MSG_RESULT([dynamic])
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    else
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      LIBCXX="$LIBCXX $STATIC_STDCXX_FLAGS"
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      JVM_LDFLAGS="$JVM_LDFLAGS $STATIC_STDCXX_FLAGS"
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      # Ideally, we should test stdc++ for the BUILD toolchain separately. For now
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      # just use the same setting as for the TARGET toolchain.
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      OPENJDK_BUILD_JVM_LDFLAGS="$OPENJDK_BUILD_JVM_LDFLAGS $STATIC_STDCXX_FLAGS"
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      AC_MSG_RESULT([static])
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    fi
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  fi
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  # libCrun is the c++ runtime-library with SunStudio (roughly the equivalent of gcc's libstdc++.so)
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  if test "x$TOOLCHAIN_TYPE" = xsolstudio && test "x$LIBCXX" = x; then
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    LIBCXX="${SYSROOT}/usr/lib${OPENJDK_TARGET_CPU_ISADIR}/libCrun.so.1"
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  fi
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  AC_SUBST(LIBCXX)
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  # Setup Windows runtime dlls
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  if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
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    TOOLCHAIN_SETUP_VS_RUNTIME_DLLS
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  fi
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])