diff options
author | Alexandre Oliva <aoliva@redhat.com> | 2010-06-21 00:23:06 +0000 |
---|---|---|
committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2010-06-21 00:23:06 +0000 |
commit | 339325b30301c66ae49cefe390585530110befc9 (patch) | |
tree | 10127b0ac2c8329bd4281e72b0dc157bd8f3d8b7 | |
parent | 6122686d1336afd10254c45e7fc8f27fb99598da (diff) |
compare-debug: Drop LTO sections.
contrib/ChangeLog:
* compare-debug: Drop LTO sections.
config/ChangeLog:
* bootstrap-lto.mk: New.
gcc/ChangeLog:
* doc/install.texi: Document bootstrap-lto.
From-SVN: r161061
-rw-r--r-- | config/ChangeLog | 4 | ||||
-rw-r--r-- | config/bootstrap-lto.mk | 8 | ||||
-rw-r--r-- | contrib/ChangeLog | 4 | ||||
-rwxr-xr-x | contrib/compare-debug | 24 | ||||
-rw-r--r-- | gcc/ChangeLog | 4 | ||||
-rw-r--r-- | gcc/doc/install.texi | 5 |
6 files changed, 41 insertions, 8 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index 78259e63597..9d18d75f2a7 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,7 @@ +2010-06-20 Alexandre Oliva <aoliva@redhat.com> + + * bootstrap-lto.mk: New. + 2010-06-10 Paolo Bonzini <bonzini@gnu.org> * override.m4: Remove obsolete (<2.64) definitions. diff --git a/config/bootstrap-lto.mk b/config/bootstrap-lto.mk new file mode 100644 index 00000000000..14099a08b8d --- /dev/null +++ b/config/bootstrap-lto.mk @@ -0,0 +1,8 @@ +# This option enables LTO for stage2 and stage3. It requires lto to +# be enabled for stage1 with --enable-stage1-languages. + +STAGE2_CFLAGS += -flto +STAGE3_CFLAGS += -flto + +# Ada fails to build with LTO, turn it off for now. +BOOT_ADAFLAGS += -fno-lto diff --git a/contrib/ChangeLog b/contrib/ChangeLog index 5037767c2af..12271531ddf 100644 --- a/contrib/ChangeLog +++ b/contrib/ChangeLog @@ -1,3 +1,7 @@ +2010-06-20 Alexandre Oliva <aoliva@redhat.com> + + * compare-debug: Drop LTO sections. + 2010-06-15 Bernhard Reutner-Fischer <aldot@gcc.gnu.org> * gcc_update: Support updating a git clone. diff --git a/contrib/compare-debug b/contrib/compare-debug index 98c80f93e98..820721cd971 100755 --- a/contrib/compare-debug +++ b/contrib/compare-debug @@ -100,9 +100,11 @@ else done # If we found .eh_frame in one but not the other, or if we could not - # find a command to tell, try to strip off the .eh_frame section - # from both. - if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x"; then + # find a command to tell, or if there are LTO sections, try to strip + # off the .eh_frame and LTO sections from both. + if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x" || + $cmd --section-headers "$1.$suf1" | grep '.gnu.lto_' > /dev/null || + $cmd --section-headers "$2.$suf2" | grep '.gnu.lto_' > /dev/null ; then suf3=$suf1. while test -f "$1.$suf3"; do suf3=$suf3. @@ -115,21 +117,27 @@ else trap 'rm -f "$1.$suf1" "$2.$suf2" "$1.$suf3" "$2.$suf4"' 0 1 2 15 - echo stripping off .eh_frame, then retrying >&2 + echo stripping off .eh_frame and LTO sections, then retrying >&2 + + seclist=".eh_frame .rel.eh_frame .rela.eh_frame" + if test "x$cmd" != "x"; then + seclist="$seclist "`{ $cmd --section-headers "$1.$suf1"; $cmd --section-headers "$2.$suf2"; } | sed -n 's,.* \(\.gnu\.lto_[^ ]*\).*,\1,p' | sort -u` + fi + rsopts=`for sec in $seclist; do echo " --remove-section $sec"; done` if (objcopy -v) 2>&1 | grep ' --remove-section' > /dev/null; then - objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf1" "$1.$suf3" + objcopy $rsopts "$1.$suf1" "$1.$suf3" mv "$1.$suf3" "$1.$suf1" - objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf2" "$2.$suf4" + objcopy $rsopts "$2.$suf2" "$2.$suf4" mv "$2.$suf4" "$2.$suf2" elif (strip --help) 2>&1 | grep ' --remove-section' > /dev/null; then cp "$1.$suf1" "$1.$suf3" - strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf3" + strip $rsopts "$1.$suf3" mv "$1.$suf3" "$1.$suf1" cp "$2.$suf2" "$2.$suf4" - strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf4" + strip $rsopts "$2.$suf4" mv "$2.$suf4" "$2.$suf2" else echo failed to strip off .eh_frame >&2 diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f827fabc6de..4895bb108a0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2010-06-20 Alexandre Oliva <aoliva@redhat.com> + * doc/install.texi: Document bootstrap-lto. + +2010-06-20 Alexandre Oliva <aoliva@redhat.com> + PR debug/44248 * lto-streamer-in.c (input_bb): Leave debug stmts alone. (input_function): Drop them here, if VTA is disabled. diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index 9a15441991c..99077d7262d 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -2150,6 +2150,11 @@ Removes any @option{-O}-started option from @code{BOOT_CFLAGS}, and adds @item @samp{bootstrap-O3} Analogous to @code{bootstrap-O1}. +@item @samp{bootstrap-lto} +Enables Link-Time Optimization for host tools during bootstrapping. +@samp{BUILD_CONFIG=bootstrap-lto} is equivalent to adding +@option{-flto} to @samp{BOOT_CFLAGS}. + @item @samp{bootstrap-debug} Verifies that the compiler generates the same executable code, whether or not it is asked to emit debug information. To this end, this |