I had some trouble getting 2.2.0 built in 64-bit mode on a Solaris 10
amd64 machine, and searching didn't turn much up. Here are my notes in
case someone else ends up with the same problems.
Environment:
$ uname -a
SunOS trouble 5.10 Generic_139556-08 i86pc i386 i86pc
[prophetic machine name!]
$ g++ -v
Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.10/3.4.3/specs
Configured with: /builds/sfw10-gate/usr/src/cmd/gcc/gcc-3.4.3/configure
--prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as
--with-ld=/usr/ccs/bin/ld --without-gnu-ld --enable-languages=c,c++
--enable-shared
Thread model: posix
gcc version 3.4.3 (csl-sol210-3_4-branch+sol_rpath)
Problems:
(1) Linking fails to find -lgcc_s.
I had to create a symlink in /usr/sfw/lib/amd64 from libgcc_s.so to
libgcc_s.so.1 before it'd find it. I'm not sure if this is a problem on
the protobuf side or whether the GCC install on this machine is slightly
broken.
(2) Linking fails because libtool is pulling in the 32-bit versions of
various runtime helper objects (crti.o, etc), not the 64-bit ones.
I tracked this down to:
- predeps_objects_CXX is being set incorrectly in configure because ..
- output_verbose_link_command is doing a 32-bit link because ..
- it uses CFLAGS and CFLAGS does not contain "-m64" because ..
- the handling of --{en,dis}sable-64bit-solaris only puts "-m64" in
CXXFLAGS, and not also in CFLAGS
Workaround: ./configure CFLAGS=-m64
...
I don't know about (1), but (2) certainly looks like it can be fixed on
protobuf side.
Also, I noticed that the Solaris 64-bit specific logic would modify
libdir even if it didn't modify CXXFLAGS because it was passed in on the
command line.
This can lead to confusing things like configuring with
CXXFLAGS="something without -m64" and ending up with a library installed
in a directory that doesn't match the compiled target at all (e.g.
32-bit library in $prefix/lib/amd64).
-O
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