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# Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
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i n c l u d e M a k e f i l e - d e c l s . a m
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i n c l u d e M a k e f i l e - e x t r a . i n c
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newname = nts
i f B U I L D O P T _ N E W _ N A M E
primaryname = $( newname)
e l s e
primaryname = rpm-ostree
e n d i f
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SUBDIRS += .
i f E N A B L E _ G T K _ D O C
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SUBDIRS += api-doc
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e n d i f
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RPM_OSTREE_GITREV = $( shell if command -v git >/dev/null 2>& 1 && test -e $( srcdir) /.git; then git describe --abbrev= 42 --tags --always HEAD; fi )
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ACLOCAL_AMFLAGS += -I m4 ${ ACLOCAL_FLAGS }
AM_CPPFLAGS += -DDATADIR= '"$(datadir)"' \
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-DLIBEXECDIR= '"$(libexecdir)"' \
-DLOCALEDIR= \" $( datadir) /locale\" \
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-DSYSCONFDIR= '"$(sysconfdir)"' \
-DRPM_OSTREE_FEATURES= '"$(RPM_OSTREE_FEATURES)"' \
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-DRPM_OSTREE_GITREV= '"$(RPM_OSTREE_GITREV)"' \
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-DGLIB_VERSION_MIN_REQUIRED= GLIB_VERSION_2_56 -DGLIB_VERSION_MAX_ALLOWED= GLIB_VERSION_2_56
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# Keep this in sync with the AM_CFLAGS in libostree; see
# that project for more information about e.g. -fno-strict-aliasing
AM_CFLAGS += -std= gnu11 -fno-strict-aliasing $( WARN_CFLAGS)
Makefile.am: Link with --enable-new-dtags
When g-ir-scanner runs, it uses a stub binary to help introspect the
target rpm-ostree library. That binary needs to link to the library, and
of course, transitively, to our bundled libdnf. Since we run the scanner
uninstalled, we use `LD_LIBRARY_PATH` to point the stub at the libdnf
from the build directory.
When we compile rpm-ostree, we use `-rpath` to point it at our libdnf,
which emits a `DT_RPATH` attribute. However, during dynamic linking at
runtime, it turns out that `LD_LIBRARY_PATH` has *lower* precedence than
`DT_RPATH`. This means that if there is already a libdnf at
`/usr/lib64/rpm-ostree`, it takes precedence.
This subtlety is mostly fine to ignore usually, because the stub doesn't
actually run any rpm-ostree business logic, so it doesn't really matter
that it runs against the "technically wrong" `libdnf.so.2`.
Where it becomes obvious something is off however is if we've just
built a new libdnf, and we have new code which references symbols from
the new libdnf that aren't in the stale libdnf at `$libdir/rpm-ostree`.
And this is exactly what was happening in CI (though it's of course
possible to reproduce this locally as well): we were using a new symbol,
`hy_goal_favor`, and building inside the cosa buildroot image, which
already has rpm-ostree installed, and so `ld.so` chose the bundled
libdnf of the installed rpm-ostree when loading the `g-ir-scanner` stub.
Thus why it failed with:
```
./tmp-introspectzh0n2cga/.libs/lt-RpmOstree-1.0: symbol lookup error: .libs/librpmostree-1.so.1: undefined symbol: hy_goal_favor
```
And of course, the root cause here has nothing to do with the stub in
itself. It's actually trivially easy to see the behaviour difference wrt
`LD_LIBRARY_PATH` on installed binaries. Using a shared object
from `python3-libdnf` which links to libdnf without using rpath, we can
see that `LD_LIBRARY_PATH` has an effect:
```
$ ldd /usr/lib64/python3.7/site-packages/libdnf/_transaction.so | grep libdnf
libdnf.so.2 => /lib64/libdnf.so.2 (0x00007fdde789e000)
$ LD_LIBRARY_PATH=./libdnf-build/libdnf ldd /usr/lib64/python3.7/site-packages/libdnf/_transaction.so | grep libdnf
libdnf.so.2 => ./libdnf-build/libdnf/libdnf.so.2 (0x00007fa615048000)
```
Whereas with rpm-ostree:
```
$ ldd /usr/bin/rpm-ostree | grep libdnf
libdnf.so.2 => /usr/lib64/rpm-ostree/libdnf.so.2 (0x00007f7da5271000)
$ LD_LIBRARY_PATH=./libdnf-build/libdnf ldd /usr/bin/rpm-ostree | grep libdnf
libdnf.so.2 => /usr/lib64/rpm-ostree/libdnf.so.2 (0x00007fc905dbd000)
```
And going further down the rabbit hole, `DT_RPATH` is in fact considered
deprecated for this reason; it makes it harder to run with uninstalled
libraries or whatever reason one has to want to override a library (one
can still use `LD_PRELOAD`, though the semantics are different, and it's
less commonly used than `LD_LIBRARY_PATH`). Instead, we should use
`DT_RUNPATH`, which does have lower precedence than `LD_LIBRARY_PATH`,
matching the usual behaviour.
To make the linker emit `DT_RUNPATH` attributes, we have to use the
`--enable-new-dtags` flag. This also then fixes the g-ir-scanner issue
described above.
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# bundled libdnf; --enable-new-dtags emits DT_RUNPATH instead of deprecated DT_RPATH, which
# can't be overridden by LD_LIBRARY_PATH; which is useful for uninstalled runs/tests
AM_LDFLAGS += " -Wl,-rpath= $( libdir) /rpm-ostree,--enable-new-dtags "
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EXTRA_DIST += autogen.sh COPYING
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GITIGNOREFILES += build-aux/ gtk-doc.make config.h.in aclocal.m4 insttree/ rpm-ostreed
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SED_SUBST = sed \
-e 's,[@]libexecdir[@],$(libexecdir),g' \
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-e 's,[@]primaryname[@],$(primaryname),g' \
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-e 's,[@]bindir[@],$(bindir),g' \
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$( NULL)
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libglnx_srcpath := $( srcdir) /libglnx
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libglnx_cflags := $( PKGDEP_GIO_UNIX_CFLAGS) -I$( libglnx_srcpath) -fvisibility= hidden
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libglnx_ldflags :=
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libglnx_libs := $( PKGDEP_GIO_UNIX_LIBS)
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i n c l u d e $( INTROSPECTION_MAKEFILE )
GIRS =
TYPELIBS = $( GIRS:.gir= .typelib)
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# These bits were originally based on gnome:librsvg/Makefile.am
# but have been adapted to non-recursive Automake, and additionally
# the "cargo vendor" bits for us live in packaging/Makefile.dist-packaging.
.PHONY : check -local -cargo clean -local -cargo use -git -not -dist -hook
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i f R U S T _ D E B U G
CARGO_RELEASE_ARGS =
e l s e
CARGO_RELEASE_ARGS = --release
e n d i f
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check-local-cargo :
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cd $( srcdir) /rust && CARGO_TARGET_DIR = $( abs_top_builddir) /target cargo test
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CHECK_LOCAL_HOOKS += check-local-cargo
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clean-local-cargo :
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cd $( srcdir) /rust && CARGO_TARGET_DIR = $( abs_top_builddir) /target cargo clean
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CLEAN_LOCAL_HOOKS += clean-local-cargo
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use-git-not-dist-hook :
@echo
@echo 'ERROR: rpm-ostree does not use/support "make dist"; see packaging/Makefile.dist-packaging' 1>& 2
@echo
@exit 1
DIST_HOOKS += use-git-not-dist-hook
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GITIGNOREFILES += target/
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# From coreos-assembler
GITIGNOREFILES += "fastbuild*.qcow2" _kola_temp/
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i n c l u d e l i b g l n x / M a k e f i l e - l i b g l n x . a m . i n c
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noinst_LTLIBRARIES += libglnx.la
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i n c l u d e M a k e f i l e - l i b p r i v . a m
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i n c l u d e M a k e f i l e - l i b d n f . a m
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i n c l u d e M a k e f i l e - l i b . a m
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i n c l u d e M a k e f i l e - d a e m o n . a m
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i n c l u d e M a k e f i l e - r p m - o s t r e e . a m
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i n c l u d e M a k e f i l e - t e s t s . a m
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i n c l u d e M a k e f i l e - m a n . a m
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i n c l u d e M a k e f i l e - b a s h . a m
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- i n c l u d e $( top_srcdir ) / g i t . m k