Instructions for Setting Up DXR

This page describes the steps necessary to manually create a working DXR. The goal of this is to eventually be able to automate the process as part of an RPM for Fedora.

• mkdir ~/dxr
• mkdir ~/dxr/tools

• Setup a working Mozilla build environment:
  • su -c "yum groupinstall 'Development Tools' 'Development Libraries' 'GNOME Software Development'"
  • su -c "yum install mercurial autoconf213"

• Setup a working GCC+plugins build environment
  • su -c "yum install mpfr-devel"

• Get Mozilla source code (needed for indexing, but also for SpiderMonkey)
  • mkdir ~/dxr/mozilla-central
  • cd ~/dxr/mozilla-central
  • hg clone http://hg.mozilla.org/mozilla-central/ mozilla

• Build SpiderMonkey
  • cd ~/dxr/tools
  • link or copy js/ from the mozilla-central tree (cp -R ~/dxr/mozilla-central/mozilla/js/ ./js)
  • cd ~/dxr/tools/js/src
  • autoconf-2.13
  • mkdir build-release
  • cd build-release
  • ../configure --prefix=~/dxr/tools/SpiderMonkey
  • make
  • make install

• Build GCC 4.3.0 with Plugin Support
  • mkdir ~/dxr/tools/gcc-dehydra
  • cd ~/dxr/tools/gcc-dehydra
  • Obtain GCC 4.3 sources - wget ftp://ftp.nluug.nl/mirror/languages/gcc/releases/gcc-4.3.0/gcc-4.3.0.tar.bz2
  • tar jxvf gcc-4.3.0.tar.bz2
  • cd gcc-4.3.0/
  • hg init .
  • hg clone http://hg.mozilla.org/users/tglek_mozilla.com/gcc-moz-plugin-mq .hg/patches
  • (for file in `cat .hg/patches/series`; do cat .hg/patches/$file; done) |patch -p1
  • cd ..
  • mkdir gcc-build
  • cd gcc-build
  • build for proper arch:
    • (32 bit) ../gcc-4.3.0/configure --without-libstdcxx --enable-checking --disable-bootstrap CFLAGS="-g3 -O0" --enable-languages=c,c++ --enable-__cxa_atexit --prefix=$PWD/../installed
    • (x86_64) ../gcc-4.3.0/configure --without-libstdcxx --enable-checking --disable-bootstrap CFLAGS="-g3 -O0 -m64" --enable-languages=c,c++ --disable-multilib --enable-__cxa_atexit --prefix=$PWD/../installed
  • make
  • make install
  • cd .. (note: ./installed now contains the built gcc)

• Build Dehydra
  • hg clone http://hg.mozilla.org/users/tglek_mozilla.com/dehydra-gcc/
  • cd dehydra-gcc
  • ./configure --js-libs=/home/dave/dxr/tools/SpiderMonkey/lib --js-headers=/home/dave/dxr/tools/SpiderMonkey/include --js-name=mozjs
    • note use of --js-name=mozjs (see bug 478103)
  • make

NOTE: running make check causes a known failure that can be ignored for now:

[dave@Germany dehydra-gcc]$ make check
make -C test check
make[1]: Entering directory `/home/dave/dxr/tools/gcc-dehydra/dehydra-gcc/test'
python unit_test_harness.py dehydra "/home/dave/dxr/tools/gcc-dehydra/gcc-build/gcc/cc1plus -quiet -O1 -ftest-coverage -fplugin=../gcc_%s.so -o /dev/null -fplugin-arg=%s %s"
...x..................................
Test Failure: 
    Test command: /home/dave/dxr/tools/gcc-dehydra/gcc-build/gcc/cc1plus -quiet -O1 -ftest-coverage -fplugin=../gcc_dehydra.so -o /dev/null -fplugin-arg=test_numinfo.js numinfo.cc
   Failure msg: Expected 'OK' output; got 'ERR  TestCase   Error: 0ul != 0u'

Unit Test Suite Summary:
     37 passed
      1 failed
      0 error(s)
make[1]: *** [check_dehydra] Error 1
make[1]: Leaving directory `/home/dave/dxr/tools/gcc-dehydra/dehydra-gcc/test'
make: *** [check] Error 2

• Get xref post-processing scripts (see bug 435814)
  • mkdir ~/dxr/tools/xref-scripts
  • cd ~/dxr/tools/xref-scripts
  • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=325316 -O class_schema.sql
  • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=325314 -O build_db.sh
  • Adjust paths for build_db.sh script:

SOURCEROOT=$HOME/dxr/mozilla-central/mozilla
OBJDIR=${SOURCEROOT}/objdir-opt
DEHYDRAROOT=$HOME/dxr/tools/xref-scripts
DBROOT=$HOME/dxr/xref-db
DBBACKUP=${DBROOT}-old

• • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=325317 -O fix_paths.pl
  • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=325318 -O process_xref.pl
  • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=325320 -O moz_types.js

• Patch xpidl to generate xref info
  • cd ~/dxr/mozilla-central
  • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=323401 -O xpidl-xref-build.diff
  • cd mozilla
  • patch -p1 < ../xpidl-xref-build.diff
  • cd ..
  • wget https://bug435814.bugzilla.mozilla.org/attachment.cgi?id=337530 -O xpidl_xref.c
  • cp xpidl_xref.c mozilla/xpcom/typelib/xpidl

• Create a mozconfig to work with dehydra

. $topsrcdir/browser/config/mozconfig
mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/objdir-opt
mk_add_options MOZ_MAKE_FLAGS=-j9
ac_add_options --enable-optimize --disable-debug
ac_add_options --disable-tests
# build with gcc+dehydra instead of normal g++
export CXX=$HOME/dxr/tools/gcc-dehydra/installed/bin/g++
export CXXFLAGS="-fplugin=$HOME/dxr/tools/gcc-dehydra/dehydra-gcc/gcc_dehydra.so -fplugin-arg=$HOME/dxr/tools/xref-scripts/moz_types.js"

• cd ~/dxr/tools/xref-scripts
• chmod +x *.pl
• ./build_db.sh