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Forcibly disable TLS on OS X.

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Forcibly disable TLS on OS X.  gcc and llvm-gcc on OS X do not support
TLS, but clang does.  Unfortunately, the implementation calls malloc()
internally during TLS initialization, which causes an unresolvable
bootstrapping issue.
This commit is contained in:
Jason Evans 2012-03-23 16:17:43 -07:00
parent 9022bf9bfd
commit b80581d309
1 changed files with 5 additions and 1 deletions
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6
configure.ac
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@ -214,6 +214,7 @@ case "${host}" in
RPATH=""
LD_PRELOAD_VAR="DYLD_INSERT_LIBRARIES"
so="dylib"
force_tls="0"
;;
*-*-freebsd*)
CFLAGS="$CFLAGS"
@ -767,7 +768,6 @@ dnl Check whether the BSD-specific _malloc_thread_cleanup() exists. If so, use
dnl it rather than pthreads TSD cleanup functions to support cleanup during
dnl thread exit, in order to avoid pthreads library recursion during
dnl bootstrapping.
force_tls="0"
AC_CHECK_FUNC([_malloc_thread_cleanup],
[have__malloc_thread_cleanup="1"],
[have__malloc_thread_cleanup="0"]
@ -813,6 +813,10 @@ if test "x${enable_tls}" = "x0" -a "x${force_tls}" = "x1" ; then
AC_MSG_RESULT([Forcing TLS to avoid allocator/threading bootstrap issues])
enable_tls="1"
fi
if test "x${enable_tls}" = "x1" -a "x${force_tls}" = "x0" ; then
AC_MSG_RESULT([Forcing no TLS to avoid allocator/threading bootstrap issues])
enable_tls="0"
fi
if test "x${enable_tls}" = "x1" ; then
AC_MSG_CHECKING([for TLS])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(