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config.gcc (default_use_cxa_atexit): Extend the description of this configure variable.

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* config.gcc (default_use_cxa_atexit): Extend the description of
  this configure variable.  Set its default value to "yes" for
  Linux, NetBSD and ELF targets on the assumption that they will
  use C libraries with the __cxa_atexit function.

From-SVN: r111636
This commit is contained in:
Nick Clifton 2006-03-02 10:01:21 +00:00 committed by Nick Clifton
parent 7533450810
commit c5dde55b61
2 changed files with 23 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2006-03-02 Nick Clifton <nickc@redhat.com>
* config.gcc (default_use_cxa_atexit): Extend the description of
this configure variable. Set its default value to "yes" for
Linux, NetBSD and ELF targets on the assumption that they will
use C libraries with the __cxa_atexit function.
2006-03-02 Ben Elliston <bje@au.ibm.com>
* config/rs6000/linux-unwind.h (frob_update_context): Mark `fs'

19
gcc/config.gcc
View File

@ -34,9 +34,14 @@
# threads support was requested.
#
# default_use_cxa_atexit
# "no" by default, can be set to "yes" if a target
# wishes to use __cxa_atexit() by default if the
# $enable___cxa_atexit variable is not set.
# The default value for the $enable___cxa_atexit
# variable. enable___cxa_atexit needs to be set to
# "yes" for the correct operation of C++ destructors
# but it relies upon the presence of a non-standard C
# library function called __cxa_atexit.
# Since not all C libraries provide __cxa_atexit the
# default value of $default_use_cxa_atexit is set to
# "no" except for targets which are known to be OK.
#
# gas_flag Either yes or no depending on whether GNU as was
# requested.
@ -461,6 +466,8 @@ case ${target} in
tm_defines="${tm_defines} UCLIBC_DEFAULT=0"
;;
esac
# Assume that glibc or uClibc are being used and so __cxa_atexit is provided.
default_use_cxa_atexit=yes
;;
*-*-gnu*)
# On the Hurd, the setup is just about the same on
@ -482,6 +489,8 @@ case ${target} in
tm_file="${cpu_type}/${cpu_type}.h i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h i386/linux.h gnu.h ${tm_file}"
;;
esac
# Assume that glibc is being used and so __cxa_atexit is provided.
default_use_cxa_atexit=yes
;;
*-*-netbsd*)
tmake_file="t-slibgcc-elf-ver t-libc-ok t-netbsd t-libgcc-pic"
@ -551,6 +560,10 @@ case ${target} in
*) echo 'Unknown thread configuration for VxWorks'; exit 1 ;;
esac
;;
*-*-elf)
# Assume that newlib is being used and so __cxa_atexit is provided.
default_use_cxa_atexit=yes
;;
esac
case ${target} in