/usr/src/gcc-5/debian/patches/skip-bootstrap-multilib.diff is in gcc-5-source 5.5.0-12ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | # DP: Skip non-default multilib and libstdc++-v3 debug builds in bootstrap builds
Index: b/src/config-ml.in
===================================================================
--- a/src/config-ml.in
+++ b/src/config-ml.in
@@ -479,6 +479,17 @@ esac
# Tests like `if [ -n "$multidirs" ]' require it.
multidirs=`echo "$multidirs" | sed -e 's/^[ ][ ]*//' -e 's/[ ][ ]*$//' -e 's/[ ][ ]*/ /g'`
+# stage1 and stage2 builds of the non-default multilib configurations
+# are not needed; skip these to save some build time.
+if [ -f ../../stage_final ] && [ -f ../../stage_current ]; then
+ stage_final=`cat ../../stage_final`
+ stage_current=`cat ../../stage_current`
+ if [ "$stage_current" != "$stage_final" ]; then
+ echo "Skip `basename $ml_realsrcdir` non-default multilibs for bootstrap stage $stage_current"
+ multidirs=
+ fi
+fi
+
# Add code to library's top level makefile to handle building the multilib
# subdirs.
Index: b/src/libstdc++-v3/acinclude.m4
===================================================================
--- a/src/libstdc++-v3/acinclude.m4
+++ b/src/libstdc++-v3/acinclude.m4
@@ -2556,7 +2556,20 @@ dnl
AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
AC_MSG_CHECKING([for additional debug build])
GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
+ if test x$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$stage_final ; then
+ skip_debug_build=yes
+ enable_libstdcxx_debug=no
+ fi
+ fi
+ fi
AC_MSG_RESULT($enable_libstdcxx_debug)
+ if test x$skip_debug_build = xyes ; then
+ AC_MSG_NOTICE([Skip libstdc++-v3 debug build for bootstrap stage $stage_current])
+ fi
GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
])
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