mirror of
git://sourceware.org/git/libabigail.git
synced 2024-12-28 20:52:07 +00:00
8b28d171c3
While trying to diff two identical files (abidiff foo.so foo.so) it appeared that canonicalizing types during e.g, the DWARF reading process was leading to subtle errors because it's extremely hard to know when a type is complete. That is, during the building of a class type C, a pointer to C can be built before C is complete. Worse, even after reading the DIE (from DWARF) of class C, there can be DIE seen later in the translation unit that modifies type C. In these late cases, one needs to wait -- not only until C is fully built, but also sometimes, after the translation unit is fully built -- to canonicalize C and then the pointer to C. This kind of things. So now there are two possible points in time when canonicalization of a type can happen. It can happen early, when the type is built. This is the case for basic types and composite types for which all sub-types are canonicalized already. It can happen late, right after we've finished reading the debug info for the current translation unit. So this patch fixes the IR traversal and uses that to walk the translation unit (or even types) after it's built. It does away with the first attempt to perform early canonicalizing only. The patch also handles type canonicalizing while reading xml-abi format. * include/abg-fwd.h (is_class_type) (type_has_non_canonicalized_subtype): Declare new functions. (is_member_type): Remove the overload that takes a decl_base_sptr. It's superfluous. We just need the one that takes a type_base_sptr. * include/abg-ir.h (translation_unit::{is_constructed, set_is_constructed}): Add new methods. (class_decl::has_virtual_member_functions): Likewise. (class decl_base): Makes it virtually inherit ir_traversable_base. (class type_base): Make this virtually inherit traversable_base too. (type_base::canonicalize): Renamed enable_canonical_equality into this. (type_base::traverse): Declare new virtual method. (canonicalize): Renamed enable_canonical_equality into this. (scope_type_decl::traverse): Declare new virtual method. (namespace_decl::get_pretty_representation): Declare new virtual method. (function_type::traverse): Likewise. (class_decl::base_spec::traverse): Likewise. (ir_node_visitor::visit): Remove the overloads and replace each of them with a pair of ... (ir_node_visitor::{visit_begin, visit_end}): ... of these. * include/abg-traverse.h (traversable_base::visiting): New method. (traversable_base::visiting_): New data member. (traversable_base::traversable_base): New constructor. * src/abg-ir.cc ({scope_decl, type_decl, namespace_decl, qualified_type_def, pointer_type_def, reference_type_def, array_type_def, enum_type_decl, typedef_decl, var_decl, function_decl, function_decl::parameter, class_decl, class_decl::member_function_template, class_decl::member_class_template, function_tdecl, class_tdecl}::traverse): Fix this to properly set the traversable_base::visiting_ flag and to reflect the new signatures of the ir_node_visitor methods. ({type_base, scope_type_decl, function_type, class_decl::base_spec}::traverse): New method. (type_base::get_canonical_type_for): Handle the case of the type already having a canonical type. Properly hash the type using the dynamic type hasher. Look through declaration-only classes to consider the definition of the class instead. Fix logic to have a single pointer of return, to ease debugging. (canonicalize): Renamed enable_canonical_equality into this. (namespace_decl::get_pretty_representation): Define new method. (ir_node_visitor::visit): Replace each of these overloads with a pair of visit_begin/visit_end ones. (translation_unit::priv::is_constructed_): New data member. (translation_unit::priv::priv): Initialize it. (translation_unit::{is_constructed, set_is_constructed}): Define new methods. (is_member_type(const decl_base_sptr)): Remove. (is_class_type(decl_base *d)): Define new function. (class_decl::has_virtual_member_functions): Define new method. (equals(const class_decl&, const class_decl&, change_kind*)): If the containing translation unit is not constructed yet, do not take virtual member functions in account when comparing the classes. This is because when reading from DWARF, there can be DIEs that change the number of virtual member functions after the DIE of the class. So one needs to start taking virtual members into account only after the translation unit has been constructed. (class non_canonicalized_subtype_detector): Define new type. (type_has_non_canonicalized_subtype): Define new function. * src/abg-corpus.cc (symtab_build_visitor_type::visit): Renamed this into symtab_build_visitor_type::visit_end. * src/abg-dwarf-reader.cc (die_type_map_type): New typedef. (die_class_map_type): This is now a typedef on a map of Dwarf_Off/class_decl_sptr. (read_context::{die_type_map_, alternate_die_type_map_, types_to_canonicalize_, alt_types_to_canonicalize_}): New data members. (read_context::{associate_die_to_decl, associate_die_to_decl_primary}): Make these methods public. (read_context::{associate_die_to_type, lookup_type_from_die_offset, is_wip_class_die_offset, types_to_canonicalize, schedule_type_for_canonicalization}): Define new methods. (build_type_decl, build_enum_type) (build_class_type_and_add_to_ir, build_qualified_type) (build_pointer_type_def, build_reference_type, build_array_type) (build_typedef_type, build_function_decl): Do not canonicalize types here. (maybe_canonicalize_type): Define new function. (build_ir_node_from_die): Take a new flag that says if the ir node is a member type/function or not. Early-canonicalize base types. Canonicalize composite types that have only canonicalized sub-types. Schedule the other types for late canonicalizing. For class types, early canonicalize those that are non-member types, that are fully constructed and that have only canonicalized sub-types. Adjust to the new signature of build_ir_node_from_die. (get_scope_for_die, build_namespace_decl_and_add_to_ir) (build_qualified_type, build_pointer_type_def) (build_reference_type, build_array_type, build_typedef_type) (build_var_decl, build_function_decl): Adjust for the new signature of build_ir_node_from_die. (build_translation_unit_and_add_to_ir): Likewise. Perform the late canonicalizing of the types that have been scheduled for that. (build_class_type_and_add_to_ir): Return a class_decl_sptr, not a decl_base_sptr. Adjust for the new signature of build_ir_node_from_die. Early canonicalize member types that are created and added to a given class, or schedule them for late canonicalizing. * src/abg-reader.cc (class read_context::{m_wip_classes_map, m_types_to_canonicalize}): New data members. (read_context::{clear_types_to_canonicalize, clear_wip_classes_map, mark_class_as_wip, unmark_class_as_wip, is_wip_class, maybe_canonicalize_type, schedule_type_for_late_canonicalizing, perform_late_type_canonicalizing}): Add new method definitions. (read_context::clear_per_translation_unit_data): Call read_context::clear_types_to_canonicalize(). (read_translation_unit_from_input): Call read_context::perform_late_type_canonicalizing() at the end of the function. (build_function_decl): Fix the function type canonicalizing (per translation) that was already in place. Do the canonicalizing of these only when the type is fully built. Oops. This was really brokend. Also, when the function type is constructed, consider it for type canonicalizing. (build_type_decl): Early canonicalize basic types. (build_qualified_type_decl, build_pointer_type_def) (build_pointer_type_def, build_reference_type_def) (build_array_type_def, build_enum_type_decl, build_typedef_decl): Handle the canonicalizing for these composite types: either early or late. (build_class_decl): Likewise. Also, mark this class a 'being built' until it's fully built. This helps the canonicalizing code to know that it should leave a class alone until it's fully built. * tests/test-ir-walker.cc (struct name_printing_visitor): Adjust to the visitor methods naming change. * configure.ac: Generate the tests/runtestcanonicalizetypes.sh testing script from tests/runtestcanonicalizetypes.sh.in. * tests/runtestcanonicalizetypes.sh.in: Add the template for the new runtestcanonicalizetypes.sh script that test for type canonicalizing. * tests/Makefile.am: Add the new runtestcanonicalizetypes.sh regression testing script to the build system. Signed-off-by: Dodji Seketeli <dodji@redhat.com>
226 lines
5.9 KiB
Plaintext
226 lines
5.9 KiB
Plaintext
m4_define([version_major], [1])
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m4_define([version_minor], [0])
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m4_define([version_revision],[0])
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AC_INIT([libabigail],
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[version_major.version_minor.version_revision],
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[http://sourceware.org/bugzilla],
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[libabigail],
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[http://sourceware.org/libabigail])
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AC_PREREQ([2.63])
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AC_CONFIG_AUX_DIR([build-aux])
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AC_CONFIG_HEADER([config.h])
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AC_CONFIG_SRCDIR([README])
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AC_CONFIG_MACRO_DIR([m4])
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AM_INIT_AUTOMAKE([1.11.1 foreign subdir-objects tar-ustar parallel-tests])
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AM_MAINTAINER_MODE([enable])
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AM_SILENT_RULES([yes])
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VERSION_MAJOR=version_major
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VERSION_MINOR=version_minor
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VERSION_REVISION=version_revision
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AC_SUBST(VERSION_MAJOR)
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AC_SUBST(VERSION_MINOR)
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AC_SUBST(VERSION_REVISION)
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AC_ARG_ENABLE(zip-archive,
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AS_HELP_STRING([--enable-zip-archive=yes|no|auto],
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[enable bundling of TUs in zip archives (default is auto)]),
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ENABLE_ZIP_ARCHIVE=$enableval,
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ENABLE_ZIP_ARCHIVE=auto)
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AC_ARG_ENABLE(cxx11,
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AS_HELP_STRING([--enable-cxx11=yes|no],
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[enable features that use the C++11 compiler]),
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ENABLE_CXX11=$enableval,
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ENABLE_CXX11=no)
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AC_ARG_ENABLE(apidoc,
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AS_HELP_STRING([--enable-apidoc=yes|no|auto],
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[enable generation of the apidoc in html]),
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ENABLE_APIDOC=$enableval,
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ENABLE_APIDOC=auto)
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AC_ARG_ENABLE(manual,
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AS_HELP_STRING([--enable-manual=yes|no|auto],
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[enable generation of the manual in html]),
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ENABLE_MANUAL=$enableval,
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ENABLE_MANUAL=auto)
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dnl *************************************************
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dnl Here is the list of versions of the dependencies
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dnl *************************************************
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AC_PROG_CXX
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AC_USE_SYSTEM_EXTENSIONS
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AC_PROG_INSTALL
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LT_PREREQ([2.2])
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LT_INIT
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AC_LANG([C++])
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AC_LANG_COMPILER_REQUIRE
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dnl Check for dependency: libelf, libdw, libebl (elfutils)
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ELF_LIBS=
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AC_CHECK_LIB([elf], [elf_end], [ELF_LIBS="-lelf"])
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AC_CHECK_HEADER([libelf.h],
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[],
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[AC_MSG_ERROR([could not find libelf.h])])
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DW_LIBS=
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AC_CHECK_LIB(dw, dwfl_begin, [DW_LIBS=-ldw])
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AC_CHECK_HEADER(elfutils/libdwfl.h,
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[],
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[AC_MSG_ERROR([could not find elfutils/libdwfl.h installed])])
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if test x$ELF_LIBS = x; then
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AC_MSG_ERROR([could not find elfutils elf library installed])
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fi
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if test x$DW_LIBS = x; then
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AC_MSG_ERROR([could not find elfutils dwarf library installed])
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fi
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AC_SUBST(DW_LIBS)
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AC_SUBST([ELF_LIBS])
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dnl Check for dependency: libxml
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LIBXML2_VERSION=2.6.22
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PKG_CHECK_MODULES(XML, libxml-2.0 >= $LIBXML2_VERSION)
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AC_SUBST(LIBXML2_VERSION)
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AC_SUBST(XML_LIBS)
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AC_SUBST(XML_CFLAGS)
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dnl Check for dependency: libzip
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LIBZIP_VERSION=0.10
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HAS_LIBZIP=no
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# The below doesn't seem to work on my box for a reason. Let's write
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# the damn thing by hand:
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# PKG_CHECK_EXISTS([libzip >= $LIBZIP_VERSION], [HAS_LIBZIP=yes], [HAS_LIBZIP=no])
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if $PKG_CONFIG --exists --print-errors "libzip >= $LIBZIP_VERSION"; then
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AC_MSG_NOTICE(found libzip version $LIBZIP_VERSION)
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HAS_LIBZIP=yes
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else
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AC_MSG_NOTICE(no libzip >= $LIBZIP_VERSION has been found)
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HAS_LIBZIP=no
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fi
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if test x$ENABLE_ZIP_ARCHIVE = xauto; then
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if test x$HAS_LIBZIP = xyes; then
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ENABLE_ZIP_ARCHIVE=yes;
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else
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ENABLE_ZIP_ARCHIVE=no
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fi
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fi
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if test x$ENABLE_ZIP_ARCHIVE = xyes; then
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AC_MSG_NOTICE(the zip-archive feature is enabled)
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else
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AC_MSG_NOTICE(the zip-archive feature is disabled)
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fi
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FOUND_LIBZIP=no
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if test x$ENABLE_ZIP_ARCHIVE = xyes; then
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PKG_CHECK_MODULES(LIBZIP, libzip >= $LIBZIP_VERSION)
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FOUND_LIBZIP=yes
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AC_SUBST(LIBZIP_VERSION)
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AC_SUBST(LIBZIP_LIBS)
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AC_SUBST(LIBZIP_CFLAGS)
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AC_DEFINE([WITH_ZIP_ARCHIVE], 1, [compile the zip archive support])
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AC_DEFINE([HAVE_LIBZIP], 1, [Defined to 1 if the libzip library is available])
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fi
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AM_CONDITIONAL(ENABLE_ZIP_ARCHIVE, test x$ENABLE_ZIP_ARCHIVE = xyes)
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DEPS_CPPFLAGS="$XML_CFLAGS $LIBZIP_CFLAGS"
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AC_SUBST(DEPS_CPPFLAGS)
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dnl Handle conditional use of a C++11 compiler
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if test x$ENABLE_CXX11 = xyes; then
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AC_DEFINE([WITH_CXX11], 1, [Defined to 1 if a C++11 compiler is used])
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fi
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AM_CONDITIONAL(ENABLE_CXX11, test x$ENABLE_CXX11 = xyes)
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dnl Check for the presence of doxygen program
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if test x$ENABLE_APIDOC != xno; then
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AC_CHECK_PROG(FOUND_DOXYGEN, doxygen, yes, no)
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if test x$ENABLE_APIDOC = xauto; then
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if test x$FOUND_DOXYGEN = xyes; then
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ENABLE_APIDOC=yes
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else
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ENABLE_APIDOC=no
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fi
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fi
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fi
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AM_CONDITIONAL(ENABLE_APIDOC, test x$ENABLE_APIDOC = xyes)
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dnl Check for the presence of the sphinx-build program
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if test x$ENABLE_MANUAL != xno; then
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AC_CHECK_PROG(FOUND_SPHINX_BUILD, sphinx-build, yes, no)
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if test x$ENABLE_MANUAL = xauto; then
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if test x$FOUND_SPHINX_BUILD = xyes; then
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ENABLE_MANUAL=yes
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else
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ENABLE_MANUAL=no
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fi
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fi
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fi
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AM_CONDITIONAL(ENABLE_MANUAL, test x$ENABLE_MANUAL = xyes)
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dnl Set the list of libraries libabigail depends on
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DEPS_LIBS="$XML_LIBS $LIBZIP_LIBS $ELF_LIBS $DW_LIBS"
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AC_SUBST(DEPS_LIBS)
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if test x$ABIGAIL_DEVEL != x; then
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CFLAGS="-g -Wall -Wextra -Werror"
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CXXFLAGS="-g -Wall -Wextra -Werror"
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fi
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AC_CONFIG_FILES([Makefile
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libabigail.pc
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include/Makefile
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include/abg-version.h
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doc/Makefile
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doc/manuals/Makefile
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src/Makefile
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tools/Makefile
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tests/Makefile
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tests/data/Makefile])
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dnl Some test scripts are generated by autofoo.
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AC_CONFIG_FILES([tests/runtestcanonicalizetypes.sh], [chmod +x tests/runtestcanonicalizetypes.sh])
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AC_OUTPUT
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AC_MSG_NOTICE([
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=====================================================================
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Libabigail: $VERSION_MAJOR.$VERSION_MINOR.$VERSION_REVISION
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=====================================================================
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Here is the configuration of the package:
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Prefix : ${prefix}
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Source code location : ${srcdir}
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C Compiler : ${CC}
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C++ Compiler : ${CXX}
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OPTIONAL FEATURES:
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Enable zip archives : ${ENABLE_ZIP_ARCHIVE}
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Use a C++-11 compiler : ${ENABLE_CXX11}
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Generate html apidoc : ${ENABLE_APIDOC}
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Generate html manual : ${ENABLE_MANUAL}
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])
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