X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=docs%2FCFEBuildInstrs.html;h=8cdb197cbc20332f9e3d8ed8fb91547d9b0257b8;hb=a1ace76c70ae5332d6f33fce5c0c1e2fdb8cca11;hp=b75c0a133fc9ca9e35a14411142ba4bcab3db09f;hpb=caf4fbd5df1f4e0c1bd305391271e203949a2477;p=oota-llvm.git diff --git a/docs/CFEBuildInstrs.html b/docs/CFEBuildInstrs.html index b75c0a133fc..8cdb197cbc2 100644 --- a/docs/CFEBuildInstrs.html +++ b/docs/CFEBuildInstrs.html @@ -5,252 +5,11 @@
This section describes how to acquire and build llvm-gcc 4.0 and 4.2, which are -based on the GCC 4.0.1/4.2.1 front-ends respectively. Both front-ends support C, -C++, Objective-C and Objective-C++. The 4.2 front-end also supports Ada and -Fortran to some extent. Note that the instructions for building these front-ends -are completely different (and much easier!) than those for building llvm-gcc3 in -the past.
- -Retrieve the appropriate llvm-gcc4.x-y.z.source.tar.gz archive from the - llvm web site.
- -It is also possible to download the sources of the llvm-gcc front end - from a read-only mirror using subversion. To check out the 4.0 code - for first time use:
- --svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.0/trunk dst-directory --
To check out the 4.2 code use:
- --svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.2/trunk dst-directory --
After that, the code can be be updated in the destination directory - using:
- -svn update-
The mirror is brought up to date every evening.
Building with support for Ada amounts to following the directions in the -top-level README.LLVM file, adding ",ada" to EXTRALANGS, for example: -EXTRALANGS=,ada
- -There are some complications however:
- -The only platform for which the Ada front-end is known to build is - 32 bit intel x86 running linux. It is unlikely to build for other - systems without some work.
The build requires having a compiler that supports Ada, C and C++. - The Ada front-end is written in Ada so an Ada compiler is needed to - build it. The LLVM parts of llvm-gcc are written in C++ so a C++ - compiler is needed to build them. The rest of gcc is written in C. - Some linux distributions provide a version of gcc that supports all - three languages (the Ada part often comes as an add-on package to - the rest of gcc). Otherwise it is possible to combine two versions - of gcc, one that supports Ada and C (such as - GNAT GPL Edition) and another - which supports C++, see below.
Supposing appropriate compilers are available, llvm-gcc with Ada support can - be built on an x86-32 linux box using the following recipe:
- -Download the LLVM source - and unpack it:
- -wget http://llvm.org/releases/2.2/llvm-2.2.tar.gz -tar xzf llvm-2.2.tar.gz -mv llvm-2.2 llvm-
or check out the - latest version from subversion:
- -svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm-
Download the - llvm-gcc-4.2 source - and unpack it:
- -wget http://llvm.org/releases/2.2/llvm-gcc4.2-2.2.source.tar.gz -tar xzf llvm-gcc4.2-2.2.source.tar.gz -mv llvm-gcc4.2-2.2.source llvm-gcc-4.2-
or check out the - latest version from subversion:
- -svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.2/trunk llvm-gcc-4.2-
Make a build directory llvm-objects for llvm and make it the - current directory:
- -mkdir llvm-objects -cd llvm-objects-
Configure LLVM (here it is configured to install into /usr/local):
- -../llvm/configure --prefix=/usr/local-
If you have a multi-compiler setup and the C++ compiler is not the - default, then you can configure like this:
- -CXX=PATH_TO_C++_COMPILER ../llvm/configure --prefix=/usr/local-
Build LLVM:
- -make-
Install LLVM (optional):
- -make install-
Make a build directory llvm-gcc-4.2-objects for llvm-gcc and make it the - current directory:
- --cd .. -mkdir llvm-gcc-4.2-objects -cd llvm-gcc-4.2-objects-
Configure llvm-gcc (here it is configured to install into /usr/local). - Additional languages can be appended to the --enable-languages switch, - for example --enable-languages=ada,c,c++.
- -../llvm-gcc-4.2/configure --prefix=/usr/local --enable-languages=ada,c --enable-checking --enable-llvm=$PWD/../llvm-objects --disable-shared --disable-bootstrap --disable-multilib-
If you have a multi-compiler setup, then you can configure like this:
--export CC=PATH_TO_C_AND_ADA_COMPILER -export CXX=PATH_TO_C++_COMPILER -../llvm-gcc-4.2/configure --prefix=/usr/local --enable-languages=ada,c --enable-checking --enable-llvm=$PWD/../llvm-objects --disable-shared --disable-bootstrap --disable-multilib-
Build and install the compiler:
- -make -make install-
-To build with support for Fortran, follow the directions in the top-level -README.LLVM file, adding ",fortran" to EXTRALANGS, for example:
- --EXTRALANGS=,fortran --
-The LLVM GCC frontend is licensed to you under the GNU General Public License -and the GNU Lesser General Public License. Please see the files COPYING and -COPYING.LIB for more details. -
- --More information is available in the FAQ. -
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