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| author | Jonathan Wakely <jwakely@redhat.com> | 2019-06-20 15:17:57 +0100 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2019-06-20 15:17:57 +0100 |
| commit | 86f73527aa3556b7d5ead9b03d8a5c91d351a409 (patch) | |
| tree | 0604cda3573398f131595dab0039ed64be1c0c6a /libstdc++-v3/acinclude.m4 | |
| parent | d306dee31dc030d1a9992927eb17b8171aaf8308 (diff) | |
| download | gcc-86f73527aa3556b7d5ead9b03d8a5c91d351a409.tar.gz | |
Skip libstdc++ debug build in early bootstrap stages
As mentioned in PR 90770, this is a patch that Debian have been carrying
for some time. The additional unoptimized copies of libstdc++ libs that
get built during each stage are never going to be used, so don't bother
building them.
For a profiled bootstrap this means we won't train the compiler on the
unoptimized library code with assertions enabled, but that doesn't seem
like a big problem, as the same code has already been compiled once for
the main libstdc++ library.
* acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
stage of bootstrap.
* configure: Regenerate.
From-SVN: r272509
Diffstat (limited to 'libstdc++-v3/acinclude.m4')
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index 19e9f14b0f5..fad390ba322 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -2899,8 +2899,20 @@ dnl Where DEFAULT is either `yes' or `no'. dnl AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ AC_MSG_CHECKING([for additional debug build]) + skip_debug_build= GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) - AC_MSG_RESULT($enable_libstdcxx_debug) + if test x$enable_libstdcxx_debug = xyes; then + if test -f $toplevel_builddir/../stage_final \ + && test -f $toplevel_builddir/../stage_current; then + stage_final=`cat $toplevel_builddir/../stage_final` + stage_current=`cat $toplevel_builddir/../stage_current` + if test x$stage_current != x$stage_final ; then + skip_debug_build=" (skipped for bootstrap stage $stage_current)" + enable_libstdcxx_debug=no + fi + fi + fi + AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build) GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) ]) |