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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug general/24498] 0.176: isn't LTO ready
Date: Wed, 06 May 2020 14:39:19 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D24498

--- Comment #19 from Mark Wielaard <mark at klomp dot org> ---
The following now works with current git master:

$ export AR=3Dgcc-ar RANLIB=3Dgcc-ranlib NM=3Dgcc-nm
$ autoreconf -f -v -i
$ ./configure --enable-maintainer-mode CFLAGS=3D"-O2 -g -flto
-flto-partition=3Dnone -Wno-error=3Dstack-usage=3D" CXXFLAGS=3D"-O2 -g -flto
-flto-partition=3Dnone"
$ make -j4
$ make check -j4

# TOTAL: 218
# PASS:  216
# SKIP:  2
# XFAIL: 0
# FAIL:  0
# XPASS: 0
# ERROR: 0

The -flto-partition=3Dnone workaround is still needed issues with symbol
versioning (even with the new gcc symver support we'll still get multiple
defined symbols).

The -Wno-error=3Dstack-usage=3D is needed for "linking" the various tools i=
n src
(they have -Wno-stack-usage=3D in src/Makefile.am, but it links with some c=
ode in
lib/ which doesn't...)

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