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
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@ -1,3 +1,7 @@
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2010-06-20 Alexandre Oliva <aoliva@redhat.com>
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* bootstrap-lto.mk: New.
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2010-06-10 Paolo Bonzini <bonzini@gnu.org>
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* override.m4: Remove obsolete (<2.64) definitions.
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@ -0,0 +1,8 @@
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# This option enables LTO for stage2 and stage3. It requires lto to
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# be enabled for stage1 with --enable-stage1-languages.
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STAGE2_CFLAGS += -flto
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STAGE3_CFLAGS += -flto
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# Ada fails to build with LTO, turn it off for now.
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BOOT_ADAFLAGS += -fno-lto
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@ -1,3 +1,7 @@
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2010-06-20 Alexandre Oliva <aoliva@redhat.com>
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* compare-debug: Drop LTO sections.
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2010-06-15 Bernhard Reutner-Fischer <aldot@gcc.gnu.org>
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* gcc_update: Support updating a git clone.
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@ -100,9 +100,11 @@ else
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done
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# If we found .eh_frame in one but not the other, or if we could not
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# find a command to tell, try to strip off the .eh_frame section
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# from both.
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if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x"; then
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# find a command to tell, or if there are LTO sections, try to strip
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# off the .eh_frame and LTO sections from both.
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if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x" ||
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$cmd --section-headers "$1.$suf1" | grep '.gnu.lto_' > /dev/null ||
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$cmd --section-headers "$2.$suf2" | grep '.gnu.lto_' > /dev/null ; then
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suf3=$suf1.
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while test -f "$1.$suf3"; do
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suf3=$suf3.
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@ -115,21 +117,27 @@ else
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trap 'rm -f "$1.$suf1" "$2.$suf2" "$1.$suf3" "$2.$suf4"' 0 1 2 15
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echo stripping off .eh_frame, then retrying >&2
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echo stripping off .eh_frame and LTO sections, then retrying >&2
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seclist=".eh_frame .rel.eh_frame .rela.eh_frame"
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if test "x$cmd" != "x"; then
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seclist="$seclist "`{ $cmd --section-headers "$1.$suf1"; $cmd --section-headers "$2.$suf2"; } | sed -n 's,.* \(\.gnu\.lto_[^ ]*\).*,\1,p' | sort -u`
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fi
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rsopts=`for sec in $seclist; do echo " --remove-section $sec"; done`
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if (objcopy -v) 2>&1 | grep ' --remove-section' > /dev/null; then
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objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf1" "$1.$suf3"
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objcopy $rsopts "$1.$suf1" "$1.$suf3"
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mv "$1.$suf3" "$1.$suf1"
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objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf2" "$2.$suf4"
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objcopy $rsopts "$2.$suf2" "$2.$suf4"
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mv "$2.$suf4" "$2.$suf2"
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elif (strip --help) 2>&1 | grep ' --remove-section' > /dev/null; then
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cp "$1.$suf1" "$1.$suf3"
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strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf3"
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strip $rsopts "$1.$suf3"
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mv "$1.$suf3" "$1.$suf1"
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cp "$2.$suf2" "$2.$suf4"
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strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf4"
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strip $rsopts "$2.$suf4"
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mv "$2.$suf4" "$2.$suf2"
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else
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echo failed to strip off .eh_frame >&2
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@ -1,3 +1,7 @@
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2010-06-20 Alexandre Oliva <aoliva@redhat.com>
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* doc/install.texi: Document bootstrap-lto.
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2010-06-20 Alexandre Oliva <aoliva@redhat.com>
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PR debug/44248
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@ -2150,6 +2150,11 @@ Removes any @option{-O}-started option from @code{BOOT_CFLAGS}, and adds
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@item @samp{bootstrap-O3}
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Analogous to @code{bootstrap-O1}.
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@item @samp{bootstrap-lto}
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Enables Link-Time Optimization for host tools during bootstrapping.
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@samp{BUILD_CONFIG=bootstrap-lto} is equivalent to adding
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@option{-flto} to @samp{BOOT_CFLAGS}.
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@item @samp{bootstrap-debug}
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Verifies that the compiler generates the same executable code, whether
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or not it is asked to emit debug information. To this end, this
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