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build: disable reduced exports by default

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This is really a packager's option. While it's helpful to encourage devs to
test this option for daily builds, it's not reliable in several real-world
use-cases. Some older libstdc++ runtimes (freebsd 9, debian wheezy, for
example) fail to properly catch exceptions due to mismatched type_info.

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19664 for more info.
This commit is contained in:
Cory Fields 2015-02-23 17:48:57 -05:00
parent 8b298ca7d7
commit 3ee028f131
1 changed files with 9 additions and 28 deletions
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35
configure.ac
View file

@ -115,9 +115,9 @@ AC_ARG_ENABLE([hardening],
AC_ARG_ENABLE([reduce-exports],
[AS_HELP_STRING([--enable-reduce-exports],
[attempt to reduce exported symbols in the resulting executables (default is yes)])],
[attempt to reduce exported symbols in the resulting executables (default is no)])],
[use_reduce_exports=$enableval],
[use_reduce_exports=auto])
[use_reduce_exports=no])
AC_ARG_ENABLE([ccache],
[AS_HELP_STRING([--enable-ccache],
@ -473,20 +473,12 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([
if test x$use_reduce_exports = xyes; then
AC_MSG_ERROR([Cannot find a working visibility attribute. Use --disable-reduced-exports.])
fi
AC_MSG_WARN([Cannot find a working visibility attribute. Disabling reduced exports.])
use_reduce_exports=no
]
)
if test x$use_reduce_exports != xno; then
AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],[RE_CXXFLAGS="-fvisibility=hidden"],
[
if test x$use_reduce_exports = xyes; then
AC_MSG_ERROR([Cannot set default symbol visibility. Use --disable-reduced-exports.])
fi
AC_MSG_WARN([Cannot set default symbol visibility. Disabling reduced exports.])
use_reduce_exports=no
])
AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],[RE_CXXFLAGS="-fvisibility=hidden"],
[AC_MSG_ERROR([Cannot set default symbol visibility. Use --disable-reduced-exports.])])
fi
LEVELDB_CPPFLAGS=
@ -533,7 +525,7 @@ AX_BOOST_THREAD
AX_BOOST_CHRONO
if test x$use_reduce_exports != xno; then
if test x$use_reduce_exports = xyes; then
AC_MSG_CHECKING([for working boost reduced exports])
TEMP_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$BOOST_CPPFLAGS $CPPFLAGS"
@ -547,25 +539,14 @@ if test x$use_reduce_exports != xno; then
#endif
]])],[
AC_MSG_RESULT(yes)
],[:
if test x$use_reduce_exports = xauto; then
use_reduce_exports=no
else
if test x$use_reduce_exports = xyes; then
],[
AC_MSG_ERROR([boost versions < 1.49 are known to be broken with reduced exports. Use --disable-reduced-exports.])
fi
fi
AC_MSG_RESULT(no)
AC_MSG_WARN([boost versions < 1.49 are known to have symbol visibility issues. Disabling reduced exports.])
])
CPPFLAGS="$TEMP_CPPFLAGS"
fi
elif test x$use_reduce_exports = xauto; then
use_reduce_exports=yes
fi
if test x$use_reduce_exports != xno; then
if test x$use_reduce_exports = xyes; then
CXXFLAGS="$CXXFLAGS $RE_CXXFLAGS"
AX_CHECK_LINK_FLAG([[-Wl,--exclude-libs,ALL]], [RELDFLAGS="-Wl,--exclude-libs,ALL"])
fi
@ -827,7 +808,7 @@ else
fi
AC_MSG_CHECKING([whether to reduce exports])
if test x$use_reduce_exports != xno; then
if test x$use_reduce_exports = xyes; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])