ToolchainAndBuild [FreeBSD WIKI]

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===== Toolchain and Build Session =====

==== Agenda ====

  * <del>Incremental builds with bmake and so on (BSDCam holdover)</del> (punted to BSDCan)
  * Review GPL in base status (BSDCam holdover)
  * Brief comparison of %%NetBSD%% (build.sh) vs buildworld/installworld/release
  * External toolchain status
    * GCC Support

==== Notes ====

=== Review of GPLinBase ===
  * Recent changes for editorial intent (pro-permissive, not anti-GPL)
  * linker (mclinker)
    * Is it feature complete?
      * linker scripts supported, not sure of exact feature set?
      * include directive (hps)
  * diff                                                                          
    * Recollection that the issue with %%OpenBSD%%'s diff was wide char support                                                            
  * binutils
    * %%FreeBSD%% stuff has been upstreamed
    * Need a detailed breakout and to decide which pieces we should take from where
  * dtc
    * Done except for removing GPL version from tree
  * gcc (in tree)
    * esoteric architecture support needs to be upstreamed
    * format extensions patch needed for cross ports
  * libgcc
    * undwinder -> libunwind
    * ~60% done
  * groff
    * roff papers -> to doc repo
    * Some ports install things that mandoc won't render, but groff does                                                                 
      * bapt@ to add hook to find ports that do not work with mandoc                 
  * gdb
    * gone by 11
    * Should be building lldb by default by 10.1

=== NetBSD build.sh, build ===
  * Some discussion about build.sh vs alternative approaches to bootstrapping build tools
    * Needs to be more organized with pre-prep by %%FreeBSD%% and %%NetBSD%% people to be highly useful
    * NO_ROOT needs to be better documented

=== External Toolchain ===
Mostly about status of Warner's work to support GCC.
  * 4.9 is target for patches.  Estimate at ~1500 lines of relevant patches.
    * our tree (loc) :
      * modernize x86 bulk of patches not needed in newer versions (5000)
      * backported and relicensed gcc bugfixes (2500)
      * %%FreeBSD%% specific architecture changes (2000)
      * printf extensions (150)
  * make issues due to gcc differences
    * how gcc --sysroot support works still unclear
    * -B differs in meaning
  * make format extensions a COMPILER_FEATURE
  * Should have a way to include a .mk file to describe external toolchain: TOOLCHAIN= %%<%%foo>.mk                                        
  * Need to document external toolchain

==== Actions ====
  * add ports impact (column), e.g. gperf, texinfo to %%GPLinBase%% (bapt)
  * Break out binutils in %%GPLinBase%% (brooks, emaste)
  * Follow up with DES re diff status (gavin)
  * Move roff papers to doc repo (???)
  * Add ports infrastructure to detect invalid man pages for groff depend (bapt)
  * Have a kernel build session at BSDCan (brooks)
  * Merge architecture specific gcc patches upstream (imp, etc)
  * make WITH(OUT)_FORMAT_EXTENSIONS a COMPILER_FEATURE (brooks)
  * Need to document external toolchain support (brooks, imp)
  * Need cross gcc ports (imp)
  * Should figure out a standardizable way to implemnt format extensions as #pragmas (theraven)

==== Summary ====
{{devsummit/201309/toolchainandbuild/toolchain-and-build-eurobsdcon2013.pdf?linkonly|Summary Presentation}}