libtool relinks all shared libraries when "make install" is performed

[Markus Franke]

Dear all,

we have a large C++ project containing
of several modules which each get compiled into seperate shared libraries.
Our directory structure looks somehow as follows:

---snip---
<src>
        <module_1>
        <module_2>
        <module_3>
        <module_4>
        ....
        <module_n>
---snap---

During compilation the shared libraries
get placed under "<src>/<module_X>/.libs".

The resulting binary can be exectuted
directly from our build directory.

The output for module "commonbasics"
during linking you can see below.

---snip---
/bin/sh ../../libtool --tag=CXX  
--mode=link g++  -DDEBUG -Wcast-align -Wundef -Wconversion -fno-builtin
-Wnon-virtual-dtor -Wno-long-long -g -Wall -pedantic -W -Wpointer-arith
-Wmissing-prototypes -Wwrite-strings -D_GNU_SOURCE -I/usr/X11R7/include
-fno-exceptions -fno-rtti -fno-check-new -DQT_THREAD_SUPPORT -fno-exceptions
-fno-rtti -version-info 1:0:0 -L/lib/qt-x11-338/lib -L/usr/include/lib
-L/usr/lib -o libCommonBasics.la -rpath /opt/kmt/lib libCommonBasics_la-Base64.lo
libCommonBasics_la-CommonOS.lo libCommonBasics_la-ConfigAccessXML.lo libCommonBasics_la-ConfigKeyXML.lo
libCommonBasics_la-Debug.lo libCommonBasics_la-global_funcs.lo libCommonBasics_la-Authentication.lo
libCommonBasics_la-LoggingCtrl.lo libCommonBasics_la-LoggingFile.lo libCommonBasics_la-LoggingService.lo
libCommonBasics_la-moc_ExternalProcess.lo libCommonBasics_la-ExternalProcess.lo
libCommonBasics_la-LoggingInterface.lo libCommonBasics_la-LoggingRemote.lo
libCommonBasics_la-strhelper.lo libCommonBasics_la-Timeval.lo libCommonBasics_la-UnitConvert.lo
../../src/commandline/libCommandLine.la ../../src/hash/libHash.la ../../src/uuid/libUUID.la
-lqt-mt -lfreetype
libtool: link: g++ -shared -nostdlib
/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../../crti.o /usr/lib/gcc/i686-t2-linux-gnu/4.4.3/crtbeginS.o
 .libs/libCommonBasics_la-Base64.o .libs/libCommonBasics_la-CommonOS.o
.libs/libCommonBasics_la-ConfigAccessXML.o .libs/libCommonBasics_la-ConfigKeyXML.o
.libs/libCommonBasics_la-Debug.o .libs/libCommonBasics_la-global_funcs.o
.libs/libCommonBasics_la-Authentication.o .libs/libCommonBasics_la-LoggingCtrl.o
.libs/libCommonBasics_la-LoggingFile.o .libs/libCommonBasics_la-LoggingService.o
.libs/libCommonBasics_la-moc_ExternalProcess.o .libs/libCommonBasics_la-ExternalProcess.o
.libs/libCommonBasics_la-LoggingInterface.o .libs/libCommonBasics_la-LoggingRemote.o
.libs/libCommonBasics_la-strhelper.o .libs/libCommonBasics_la-Timeval.o
.libs/libCommonBasics_la-UnitConvert.o   -Wl,-rpath -Wl,/root/KMT/KMT/src/commandline/.libs
-Wl,-rpath -Wl,/root/KMT/KMT/src/hash/.libs -Wl,-rpath -Wl,/root/KMT/KMT/src/uuid/.libs
-L/lib/qt-x11-338/lib -L/usr/include/lib -L/usr/lib ../../src/commandline/.libs/libCommandLine.so
-L/opt/postgresql/lib -L/usr/X11R7/lib -L//lib -L/TOOLCHAIN/src.gcc.default.20100331.154012.28770.tut-pc188/gcc-4.4.3/objdir/i686-t2-linux-gnu/libstdc++-v3/src
-L/TOOLCHAIN/src.gcc.default.20100331.154012.28770.tut-pc188/gcc-4.4.3/objdir/i686-t2-linux-gnu/libstdc++-v3/src/.libs
../../src/hash/.libs/libHash.so ../../src/uuid/.libs/libUUID.so /usr/X11R7/lib/libXfixes.so
/usr/lib/libexpat.so /usr/X11R7/lib/libxcb.so /usr/X11R7/lib/libXau.so
/usr/lib/libuuid.so /lib/qt-x11-338/lib/libqt-mt.so /usr/X11R7/lib/libXrender.so
/usr/X11R7/lib/libXrandr.so /usr/X11R7/lib/libXcursor.so /usr/X11R7/lib/libXinerama.so
/usr/X11R7/lib/libXft.so /usr/X11R7/lib/libfontconfig.so /usr/X11R7/lib/libXext.so
/usr/X11R7/lib/libX11.so /usr/X11R7/lib/libSM.so /usr/X11R7/lib/libICE.so
-ldl -lpthread /usr/lib/libfreetype.so -lz -L/usr/lib/gcc/i686-t2-linux-gnu/4.4.3
-L/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../../../i686-t2-linux-gnu/lib
-L/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../.. /usr/lib/libstdc++.so -lm
-lc -lgcc_s /usr/lib/gcc/i686-t2-linux-gnu/4.4.3/crtendS.o /usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../../crtn.o
   -Wl,-soname -Wl,libCommonBasics.so.1 -o .libs/libCommonBasics.so.1.0.0
libtool: link: (cd ".libs"
&& rm -f "libCommonBasics.so.1" && ln -s "libCommonBasics.so.1.0.0"
"libCommonBasics.so.1")
libtool: link: (cd ".libs"
&& rm -f "libCommonBasics.so" && ln -s "libCommonBasics.so.1.0.0"
"libCommonBasics.so")
libtool: link: ( cd ".libs"
&& rm -f "libCommonBasics.la" && ln -s "../libCommonBasics.la"
"libCommonBasics.la" )
---snap---

As one can see, absolute paths are compiled
into the resulting library for the RPATH. (/root/KMT/KMT/src/commandline/.libs)

When performing the "make install"
step all the libraries and binaries get installed to our prefix directory
"/opt/kmt". This currently takes very long (~20 minutes) as libtool
relinks all libraries. The output for module "commonbasics" you
can see below.

---snip---
-bash-4.1# make install DESTDIR=/
make[1]: Entering directory `/root/KMT/KMT/src/commonbasics'
test -z "/opt/kmt/lib" ||
../../admin/install-sh -c -d "//opt/kmt/lib"
 /bin/sh ../../libtool   --mode=install
/usr/bin/install -c   libCommonBasics.la '//opt/kmt/lib'
libtool: install: warning: relinking
`libCommonBasics.la'
libtool: install: (cd /root/KMT/KMT/src/commonbasics;
/bin/sh /root/KMT/KMT/libtool  --tag CXX --mode=relink g++ -DDEBUG
-Wcast-align -Wundef -Wconversion -fno-builtin -Wnon-virtual-dtor -Wno-long-long
-g -Wall -pedantic -W -Wpointer-arith -Wmissing-prototypes -Wwrite-strings
-D_GNU_SOURCE -I/usr/X11R7/include -fno-exceptions -fno-rtti -fno-check-new
-DQT_THREAD_SUPPORT -fno-exceptions -fno-rtti -version-info 1:0:0 -L/lib/qt-x11-338/lib
-L/usr/include/lib -L/usr/lib -o libCommonBasics.la -rpath /opt/kmt/lib
libCommonBasics_la-Base64.lo libCommonBasics_la-CommonOS.lo libCommonBasics_la-ConfigAccessXML.lo
libCommonBasics_la-ConfigKeyXML.lo libCommonBasics_la-Debug.lo libCommonBasics_la-global_funcs.lo
libCommonBasics_la-Authentication.lo libCommonBasics_la-LoggingCtrl.lo
libCommonBasics_la-LoggingFile.lo libCommonBasics_la-LoggingService.lo
libCommonBasics_la-moc_ExternalProcess.lo libCommonBasics_la-ExternalProcess.lo
libCommonBasics_la-LoggingInterface.lo libCommonBasics_la-LoggingRemote.lo
libCommonBasics_la-strhelper.lo libCommonBasics_la-Timeval.lo libCommonBasics_la-UnitConvert.lo
../../src/commandline/libCommandLine.la ../../src/hash/libHash.la ../../src/uuid/libUUID.la
-lqt-mt -lfreetype -inst-prefix-dir /)
libtool: relink: g++ -shared -nostdlib
/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../../crti.o /usr/lib/gcc/i686-t2-linux-gnu/4.4.3/crtbeginS.o
 .libs/libCommonBasics_la-Base64.o .libs/libCommonBasics_la-CommonOS.o
.libs/libCommonBasics_la-ConfigAccessXML.o .libs/libCommonBasics_la-ConfigKeyXML.o
.libs/libCommonBasics_la-Debug.o .libs/libCommonBasics_la-global_funcs.o
.libs/libCommonBasics_la-Authentication.o .libs/libCommonBasics_la-LoggingCtrl.o
.libs/libCommonBasics_la-LoggingFile.o .libs/libCommonBasics_la-LoggingService.o
.libs/libCommonBasics_la-moc_ExternalProcess.o .libs/libCommonBasics_la-ExternalProcess.o
.libs/libCommonBasics_la-LoggingInterface.o .libs/libCommonBasics_la-LoggingRemote.o
.libs/libCommonBasics_la-strhelper.o .libs/libCommonBasics_la-Timeval.o
.libs/libCommonBasics_la-UnitConvert.o   -L/lib/qt-x11-338/lib -L/usr/include/lib
-L/usr/lib -L//opt/kmt/lib -L/opt/kmt/lib -lCommandLine -L/opt/postgresql/lib
-L/usr/X11R7/lib -L//lib -L/TOOLCHAIN/src.gcc.default.20100331.154012.28770.tut-pc188/gcc-4.4.3/objdir/i686-t2-linux-gnu/libstdc++-v3/src
-L/TOOLCHAIN/src.gcc.default.20100331.154012.28770.tut-pc188/gcc-4.4.3/objdir/i686-t2-linux-gnu/libstdc++-v3/src/.libs
-lHash -lUUID -L//usr/X11R7/lib -lXfixes -L//usr/lib -lexpat -lxcb -lXau
-luuid -L//lib/qt-x11-338/lib -lqt-mt -lXrender -lXrandr -lXcursor -lXinerama
-lXft -lfontconfig -lXext -lX11 -lSM -lICE -ldl -lpthread -lfreetype -lz
-L/usr/lib/gcc/i686-t2-linux-gnu/4.4.3 -L/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../../../i686-t2-linux-gnu/lib
-L/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../.. -lstdc++ -lm -lc -lgcc_s
/usr/lib/gcc/i686-t2-linux-gnu/4.4.3/crtendS.o /usr/lib/gcc/i686-t2-linux-gnu/4.4.3/../../../crtn.o
   -Wl,-soname -Wl,libCommonBasics.so.1 -o .libs/libCommonBasics.so.1.0.0
libtool: install: /usr/bin/install -c
.libs/libCommonBasics.so.1.0.0T //opt/kmt/lib/libCommonBasics.so.1.0.0
libtool: install: (cd //opt/kmt/lib
&& { ln -s -f libCommonBasics.so.1.0.0 libCommonBasics.so.1 ||
{ rm -f libCommonBasics.so.1 && ln -s libCommonBasics.so.1.0.0
libCommonBasics.so.1; }; })
libtool: install: (cd //opt/kmt/lib
&& { ln -s -f libCommonBasics.so.1.0.0 libCommonBasics.so || {
rm -f libCommonBasics.so && ln -s libCommonBasics.so.1.0.0 libCommonBasics.so;
}; })
libtool: install: /usr/bin/install -c
.libs/libCommonBasics.lai //opt/kmt/lib/libCommonBasics.la
libtool: install: warning: remember
to run `libtool --finish /opt/kmt/lib'
make[1]: Nothing to be done for `install-data-am'.
make[1]: Leaving directory `/root/KMT/KMT/src/commonbasics'
---snap---

How can I avoid this additional relinking
step during "make install"? I guess it's because of the absolutes
paths which get compiled into the libraries RPATH during compilation. Actually,
we always want to run the binary from it's install prefix and not out of
the build tree. How can I force libtool to set the correct rpath for the
resulting libraries already during the compilation step so that relinking
ist not needed anymore during "make install".

We are using libtool-2.2.6b and automake-1.11.1.
Please feel free to ask any further information which you might need to
figure out the problem.

Thanks for any comments on this,

Markus Franke



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