If you are editing code that creates shared libraries, please be aware
that the options -shared, -soname, --whole-archive and
--no-whole-archive will NOT be acceptable on Solaris IF the Sun linker
is used, but WILL be if the GNU linker is used.
People use both linkers on Solaris, so different options must be used
when creating shared libraries.
The GNU linker options -shared, -soname, --whole-archive and
--no-whole-archive would need to be changed if the Sun linker is used
on Solaris to -G, -h, -zallextract and -zdefaultextract respectively.
One line of code I looked at recently has this:
$(LINK_CXX) -fPIC -shared -Wl,-soname,lib`cat DIRNAME`.so -o lib`cat
DIRNAME`.so $(OBJ) $(GMP_LIBDIR) $(GMP_LIB)
The -Wl, option to gcc or g++ passes whatever follows the comma directly
to the linker. So in the above case, -soname gets passed to the linker,
which will fail if the OS is Solaris AND the linker is the Sun one.
In scripts, it's easy to create an exception for Solaris with the Sun
linker, by first checking if the OS is Solaris (uname returns 'SunOS')
and checking if the linker (ld) outputs 'GNU' if called with the option
'--version'
The following is one bit of example code, changes the -soname option to
a -h using sed.
Obviously different things are appropriate in shell scrips, make files
and python scripts. But if you can try to create variable names for the
options it would help.
If you build a package which creates shared libraries, perhaps you
make me aware of it, then I see if it breaks on Solaris.
Dave
if [ `uname` = "Darwin" ]; then
echo "64 bit MacIntel"
CFLAGS="-O3 -g -m64 -fPIC -L."; export CFLAGS
LDFLAGS="-m64 "; export LDFLAGS
cp patches/makemakefile.py src/makemakefile.py
elif [ `uname` = "SunOS" -a "`ld --version 2>&1 | grep GNU`" = "" ];
then
# Change -soname to -h if the Sun linker is used.
sed 's/-soname/-h/g' src/makemakefile.py > /tmp/makemakefile.py.$$
mv /tmp/makemakefile.py.$$ src/makemakefile.py
CFLAGS="-fPIC -O3 -L."; export CFLAGS
LDFLAGS=""; export LDFLAGS
else
CFLAGS="-fPIC -O3 -L."; export CFLAGS
LDFLAGS=""; export LDFLAGS
fi
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