[LLVMdev] llvm build not respecting DESTDIR?
rspencer at reidspencer.com
Fri Dec 8 06:26:32 PST 2006
On Thu, 2006-12-07 at 23:31 -0800, Erick Tryzelaar wrote:
> I'm updating the macports build of llvm, and I'm running into an issue
> trying to stage llvm into a temporary directory. It builds fine, but
> when I try to install it into a temporary location, it insists on
> installing into the final location.
> The only reference I saw to the
> standard gnu DESTDIR was in the llvm.spec file, but none of the
> generated Makefiles have that value.
LLVM isn't strictly a GNU project. It has similarities, but this
obviously isn't one of them :)
> Is there another way to do this?
> Here's the commands I'm running:
> > ./configure --prefix=/opt/local
> > make ENABLED_OPTIMIZED=1 OPTIMIZE_OPTION='-O2' tools-only
> > make install
DESTDIR isn't used by the makefiles so specifying a value for it isn't
going to accomplish what you want. The --prefix= configure option
controls where installation goes to.
> This is the output from make install. You can see that it's trying to
> install into the final location, /opt/local:
> install: /opt/local/include/./llvm/Transforms/Utils/Local.h: No such
> file or directory
> llvm: Making install directory /opt/local/include/./llvm/Transforms/Utils
> mkdir: /opt/local/include/./llvm: Permission denied
> mkdir: /opt/local/include/./llvm: No such file or directory
> mkdir: /opt/local/include/./llvm/Transforms: No such file or directory
Yes, that's what I'd expect.
> I also tried "make install PREFIX=...", but that didn't work either. Are
> there any suggestions on how to get this to work?
Yes, but its a bit verbose. The variables that control this are all
defined in the Makefile.config file. The variables are:
PROJ_prefix := /proj/llvm/install-1
PROJ_bindir := /proj/llvm/install-1/bin
PROJ_libdir := /proj/llvm/install-1/lib
PROJ_datadir := /proj/llvm/install-1/share
PROJ_docsdir := /proj/llvm/install-1/docs/llvm
PROJ_etcdir := /proj/llvm/install-1/etc/llvm
PROJ_includedir := /proj/llvm/install-1/include
PROJ_infodir := /proj/llvm/install-1/info
PROJ_mandir := /proj/llvm/install-1/man
The values are from my environment. You can either override each of
these individually on the command line or replace their values in
> Also, some questions about llvm-gcc. If we're just installing the binary
> version, does anything need to be done in order to let llvm find the
> libraries, such as modifying the DLYD_LIBRARY_PATH, or are all the paths
There aren't any shared libraries so the library path doesn't matter.
For llvm-gcc3, the path needs to be able to find gccas and gccld from
the LLVM build. For llvm-gcc4, everything is linked in statically so
after llvm-gcc4 is built, it doesn't matter where LLVM lives.
> What about for the stuff compiled by llvm-gcc, does that need
> paths to be set as well?
It shouldn't. llvm-gcc will pre-pend its library paths to the search
list. Wherever it installed the libraries it will search first.
> Finally, does llvm require llvm-gcc for it's runtime, as mentioned by
> GettingStarted.html, or can it be used by itself?
LLVM does not require llvm-gcc for its runtime. The runtime library is
only to support llvm-gcc3 and building it requires llvm-gcc3 to be
available. However, release 2.0 (current one we're working on) will drop
support for llvm-gcc3. Its replacement, llvm-gcc4 will not require the
runtime library as it will use llvm-gcc's normal runtime (libgcc.a).
LLVM can be used by itself but the only languages it can process are
LLVM assembly and Stacker. llvm-gcc4 just provides the C/C++/Obj-C/Obj-C
++ front end languages. Other front ends could be developed.
> If not, does it make
> sense to package the two in the two packages?
> Macports is a source-based
> packaging system, so it would seem odd to have to temporarily install
> llvm-gcc to build llvm, but then install llvm-gcc in a separate package.
That issue goes away with llvm-gcc4. You would simply build llvm and
then build llvm-gcc4. With llvm-gcc3, its a little more contorted:
1. build llvm tools only (don't build the runtime)
2. build llvm-gcc3
3. build the llvm runtime library
> Thanks for all your help!
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
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