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Enabling lto will result in failure during test phase, to be precise test 67 will cause it.
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Compiler flags for this test (and most likely for rest of them) are inherited from actual build phase.
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I'm not sure if this is expected.
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Most distribution disables this test. We try to keep it by stripping lto flags for it.
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Origin for this tests: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=391427
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--- a/tests/link-order2.at 2015-01-16 19:52:04.000000000 +0100
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+++ b/tests/link-order2_new.at 2021-11-30 02:01:09.574451906 +0100
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@@ -47,6 +47,8 @@
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AT_KEYWORDS([libtool])
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AT_KEYWORDS([interactive])dnl running 'wrong' may cause a popup window.
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+NO_LTO_CFLAGS=${CFLAGS/-flto*-ffat-lto-objects }
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+
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eval `$LIBTOOL --config | $EGREP '^(shlibpath_var|allow_undefined_flag)='`
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undefined_setting=-no-undefined
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@@ -89,12 +91,12 @@
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EOF
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for file in a0 a1 b; do
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- $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c $file.c
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+ $LIBTOOL --mode=compile $CC $CPPFLAGS $NO_LTO_CFLAGS -c $file.c
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done
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-$CC $CPPFLAGS $CFLAGS -c main.c
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+$CC $CPPFLAGS $NO_LTO_CFLAGS -c main.c
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# Build an old, installed library.
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-$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o liba0.la a0.lo -rpath $deflibdir
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+$LIBTOOL --mode=link $CC $NO_LTO_CFLAGS $LDFLAGS $static -o liba0.la a0.lo -rpath $deflibdir
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$LIBTOOL --mode=install cp liba0.la $deflibdir/liba0.la
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$LIBTOOL --mode=clean rm -f liba0.la
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@@ -118,13 +120,13 @@
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esac
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test non-libtool,-static-libtool-libs = "$type_of_depdepl,$static" &&
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static=-all-static
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- $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o liba1.la a1.lo -rpath $libdir
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- $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o libb.la b.lo liba1.la -rpath $libdir
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- AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o main$EXEEXT main.$OBJEXT libb.la -la0],
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+ $LIBTOOL --mode=link $CC $NO_LTO_CFLAGS $LDFLAGS $static -o liba1.la a1.lo -rpath $libdir
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+ $LIBTOOL --mode=link $CC $NO_LTO_CFLAGS $LDFLAGS $static -o libb.la b.lo liba1.la -rpath $libdir
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+ AT_CHECK([$LIBTOOL --mode=link $CC $NO_LTO_CFLAGS $LDFLAGS $static -o main$EXEEXT main.$OBJEXT libb.la -la0],
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[], [ignore], [ignore])
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LT_AT_EXEC_CHECK([./main])
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# Now test that if we reverse the link order, the program fails.
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- AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o wrong$EXEEXT main.$OBJEXT -la0 libb.la],
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+ AT_CHECK([$LIBTOOL --mode=link $CC $NO_LTO_CFLAGS $LDFLAGS $static -o wrong$EXEEXT main.$OBJEXT -la0 libb.la],
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[], [ignore], [ignore])
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if test yes, != "$shared_fails,$static"; then
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LT_AT_EXEC_CHECK([./wrong], [1], [], [ignore], [|| (exit 1)])
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