diff options
author | Brian Gaeke <gaeke@uiuc.edu> | 2003-10-21 21:58:38 +0000 |
---|---|---|
committer | Brian Gaeke <gaeke@uiuc.edu> | 2003-10-21 21:58:38 +0000 |
commit | 46079d2274de38bd08ea7f731726d1a5a1296b75 (patch) | |
tree | 82b6a47c01dc25c1c396c93b76afbedba2eac45a /docs/CFEBuildInstrs.html | |
parent | f85770c9a670dc5c360015125389c389ae9592c7 (diff) | |
download | external_llvm-46079d2274de38bd08ea7f731726d1a5a1296b75.zip external_llvm-46079d2274de38bd08ea7f731726d1a5a1296b75.tar.gz external_llvm-46079d2274de38bd08ea7f731726d1a5a1296b75.tar.bz2 |
Add C/C++ build instructions, first draft.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9355 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/CFEBuildInstrs.html')
-rw-r--r-- | docs/CFEBuildInstrs.html | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/docs/CFEBuildInstrs.html b/docs/CFEBuildInstrs.html new file mode 100644 index 0000000..3dde111 --- /dev/null +++ b/docs/CFEBuildInstrs.html @@ -0,0 +1,140 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<html><head><title>Bootstrapping the C/C++ Front-End</title></head> + +<body bgcolor=white> +<center><h1><font size=7>Bootstrapping the C/C++ Front-End</font></h1></center> + +<br><br> + +<!-- *********************************************************************** --> +<table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0> +<tr><td align=center><font color="#EEEEFF" size=+2 face="Georgia,Palatino"><b> +<a name="instructions">Instructions +</b></font></td></tr></table><ul> +<!-- *********************************************************************** --> + +<p>This document is intended to explain the process of building the LLVM +C/C++ front-end, based on GCC 3.4, from source.</p> + +<p><b>NOTE:</b> This is currently a somewhat fragile, error-prone +process, and you should only try to do it if (A) you really, really, +really can't use the binaries we distribute, and (B) you are a wicked +good GCC hacker.</p> + +<p>We welcome patches to help make this process simpler.</p> + +<ol> +<li><p>Configure and build the LLVM libraries and tools using:</p> +<pre> + % cd llvm + % ./configure [options...] + % gmake tools-only +</pre> + <p>The use of the non-default target "tools-only" means that the + LLVM tools and libraries will build, and the binaries will be + deposited in llvm/tools/Debug, but the runtime (bytecode) + libraries will not build.</p> + +<li><p>Add the directory containing the tools to your PATH.</p> +<pre> + % set path = ( `cd llvm/tools/Debug && pwd` $path ) +</pre> + +<li><p>Unpack the C/C++ front-end source into cfrontend/src.</p> + +<li><p>Edit src/configure. Change the first line (starting w/ #!) to + contain the correct full pathname of sh.</p> + +<li><p>Make "build" and "install" directories as siblings of the "src" + tree.</p> +<pre> + % pwd + /usr/local/example/cfrontend/src + % cd .. + % mkdir build install + % set CFEINSTALL = `pwd`/install +</pre> + +<li><p>Configure, build and install the C front-end:</p> +<pre> + % cd build + % ../src/configure --prefix=$CFEINSTALL --disable-nls --disable-shared \ + --enable-languages=c,c++ + % gmake all-gcc + % setenv LLVM_LIB_SEARCH_PATH `pwd`/gcc + % gmake all; gmake install +</pre> + + <p><b>Common Problem 1:</b> You may get error messages regarding the fact + that LLVM does not support inline assembly. Here are two common + fixes:</p> + + <ul> + <li><p><b>Fix 1:</b> If you have system header files that include + inline assembly, you may have to modify them to remove the inline + assembly, and install the modified versions in + <code>$CFEINSTALL/<i>target-triplet</i>/sys-include</code>.</p> + + <li><b>Fix 2:</b> If you are building the C++ front-end on a CPU we + haven't tried yet, you will probably have to edit the appropriate + version of atomicity.h under + <code>src/libstdc++-v3/config/cpu/<i>name-of-cpu</i>/atomicity.h</code> + and apply a patch so that it does not use inline assembly.</p> + </ul> + + <p><b>Common Problem 2:</b> <b>FIXME:</b> Chris should add a section about + common problems porting to a new architecture, including changes you + might have to make to the gcc/gcc/config/<i>name-of-cpu</i> + directory. For example (expand these):</p> + + <ul> + <li>Munge linker flags so they are compatible with gccld. + <li>Change the target so it doesn't have long double; just use double + instead. + <li>No inline assembly for position independent code. + <li>We handle init and fini differently. + <li>Do not include inline assembly map things for SPARC, or profile things. + </ul> + +<li><p>Go back into the LLVM source tree proper. Edit Makefile.config +to redefine <code>LLVMGCCDIR</code> to the full pathname of the +<code>$CFEINSTALL</code> directory, which is the directory you just +installed the C front-end into. (The ./configure script is likely to +have set this to a directory which does not exist on your system.)</p> + +<li><p>If you edited header files during the C/C++ front-end build as +described in "Fix 1" above, you must now copy those header files from +<code>$CFEINSTALL/<i>target-triplet</i>/sys-include</code> to +<code>$CFEINSTALL/lib/gcc/<i>target-triplet</i>/3.4-llvm/include</code>. +(This should be the "include" directory in the same directory as the +libgcc.a library, which you can find by running +<code>$CFEINSTALL/bin/gcc --print-libgcc-file-name</code>.)</p> + +<li><p>Build and install the runtime (bytecode) libraries by running:</p> +<pre> + % gmake -C runtime + % mkdir $CFEINSTALL/bytecode-libs + % gmake -C runtime install + % setenv LLVM_LIB_SEARCH_PATH $CFEINSTALL/bytecode-libs +</pre> + +<li><p>Test the newly-installed C frontend by one or more of the +following means:</p> + <ul> + <li> compiling and running a "hello, world" program in C or C++. + <li> running the tests under test/Programs using <code>gmake -C + test/Programs</code>; + </ul> + +</p> +</ol> + +<!-- *********************************************************************** --> +</ul> +<!-- *********************************************************************** --> + +<hr><font size-1> +<address><a href="mailto:gaeke -at- uiuc.edu">Brian Gaeke</a></address> +Last modified: $Date$ +</font></body></html> + |