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Add support for libstdc++ assertions in autoconf builds
This is less powerful than stdlib-debug, but at least it does not change the ABI. This avoids crashes with Qt6 in particular. The new defaults are: - stdlib-assertions is enabled by default in development builds; - stdlib-debug has to be enabled explicitely. Fixes bug #12215.
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22
INSTALL
22
INSTALL
@ -109,12 +109,13 @@ flags:
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release prerelease development profiling gprof
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optimization -O2 -O2 -O -O2 -O2
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assertions X X
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stdlib-debug X
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stdlib-assertions X
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stdlib-debug
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warnings X X
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debug X X X X
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maintainer-mode X
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The defaults are as follows in terms of version number
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The defaults are as follows in terms of version number:
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release: stable release (2.x.y)
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prerelease: version number contains `alpha', `beta', `rc' or `pre'.
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development: version number contains `dev'.
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@ -228,12 +229,17 @@ values):
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code which checks that some variables have sane values. Opposite
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is --disable-assertions.
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o --enable-stdlib-debug adds some debug code in the standard
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library; this slows down the code, but has been helpful in the
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past to find bugs. Note that this is in general incompatible with
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the system hunspell library (as of version 1.5). You may have to use
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--disable-stdlib-debug when linking development versions against
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your system's hunspell library.
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o --enable-stdlib-assertions adds some bound checking code in the
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libstdc++ standard library; this slows down the code, but has been
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helpful in the past to find bugs. This has no effect when using
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llvm's libc++ library.
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o --enable-stdlib-debug encompasses stdlib-assertions and adds
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additional checks in libstdc++. Note that this changes the ABI and
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is in general incompatible with the system hunspell library (as of
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version 1.5). You may have to use --disable-stdlib-debug when
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linking development versions against your system's hunspell
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library. This has no effect when using llvm's libc++ library.
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@ -310,9 +310,14 @@ AC_ARG_ENABLE(debug,
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)
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AC_ARG_ENABLE(stdlib-debug,
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AS_HELP_STRING([--enable-stdlib-debug],[enable debug mode in the standard library]),,
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[AS_CASE([$build_type], [dev*], [enable_stdlib_debug=yes],
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[enable_stdlib_debug=no])]
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AS_HELP_STRING([--enable-stdlib-debug],[enable debug mode in libstdc++]),,
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[enable_stdlib_debug=no]
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)
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AC_ARG_ENABLE(stdlib-assertions,
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AS_HELP_STRING([--enable-stdlib-assertions],[enable assertions in libstdc++]),,
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[AS_CASE([$build_type], [dev*], [enable_stdlib_assertions=yes],
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[enable_stdlib_assertions=no])]
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)
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### set up optimization
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@ -357,6 +362,10 @@ if test x$GXX = xyes; then
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CXX_VERSION="($clang_version)"
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fi
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case $gxx_version in
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2.*|3.*|4.@<:@0-8@:>@*) AC_MSG_ERROR([gcc >= 4.9 is required]);;
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esac
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AM_CXXFLAGS="$lyx_optim $AM_CXXFLAGS"
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if test x$enable_debug = xyes ; then
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AM_CXXFLAGS="-g $AM_CXXFLAGS"
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@ -381,9 +390,6 @@ if test x$GXX = xyes; then
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[AM_CXXFLAGS="$AM_CXXFLAGS -Wno-deprecated-copy"], [], [-Werror])
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AC_LANG_POP(C++)
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fi
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case $gxx_version in
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2.*|3.*|4.@<:@0-8@:>@*) AC_MSG_ERROR([gcc >= 4.9 is required]);;
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esac
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if test x$enable_stdlib_debug = xyes ; then
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dnl FIXME: for clang/libc++, one should define _LIBCPP_DEBUG2=0
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dnl See http://clang-developers.42468.n3.nabble.com/libc-debug-mode-td3336742.html
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@ -396,6 +402,14 @@ if test x$GXX = xyes; then
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enable_stdlib_debug=no
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fi
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fi
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if test x$enable_stdlib_assertions = xyes ; then
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if test x$lyx_cv_lib_stdcxx = xyes ; then
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lyx_flags="$lyx_flags stdlib-assertions"
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AC_DEFINE(_GLIBCXX_ASSERTIONS, 1, [libstdc++ assertions mode])
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else
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enable_stdlib_assertions=no
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fi
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fi
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fi
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# Some additional flags may be needed
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