patches/glibc/ports-2.10.1/220-section-comments.patch
author Anthony Foiani <anthony.foiani@gmail.com>
Thu May 19 23:06:16 2011 +0200 (2011-05-19)
changeset 2461 ec30b191f0e3
permissions -rw-r--r--
complibs/ppl: build only C and C++ interfaces for PPL

By default, PPL wants to build interfaces for any of a variety of
langauges it finds on the local host (python, java, possibly perl, also
more esoteric languages such as ocaml and prolog).

These extra interfaces can double the compile time for the library. For
single-process builds, I found a savings of more than 40%:

default / j1: 716s total, 143.2s avg, 0.52s stdev
just_c / j1: 406s total, 81.2s avg, 0.33s stdev
just_c_cpp / j1: 413s total, 82.6s avg, 0.22s stdev

And for multi-process builds, it approached 50%:

default / j4: 625s total, 125.0s avg, 0.57s stdev
just_c / j4: 338s total, 67.6s avg, 1.25s stdev
just_c_cpp / j4: 327s total, 65.4s avg, 0.36s stdev

Since the PPL we build within ct-ng is only used by GCC, we only need to
build the C and C++ interfaces.

Signed-Off-By: Anthony Foiani <anthony.foiani@gmail.com>
     1 http://sources.redhat.com/ml/binutils/2004-04/msg00665.html
     2 
     3 fixes building on some architectures (like m68k/arm/cris/etc...) because
     4 it does the right thing
     5 
     6 diff -durN glibc-2.10.1.orig/include/libc-symbols.h glibc-2.10.1/include/libc-symbols.h
     7 --- glibc-2.10.1.orig/include/libc-symbols.h	2009-03-14 00:51:46.000000000 +0100
     8 +++ glibc-2.10.1/include/libc-symbols.h	2009-11-13 00:50:07.000000000 +0100
     9 @@ -239,12 +239,12 @@
    10  #  define __make_section_unallocated(section_string)
    11  # endif
    12  
    13 -/* Tacking on "\n\t#" to the section name makes gcc put it's bogus
    14 +/* Tacking on "\n#APP\n\t#" to the section name makes gcc put it's bogus
    15     section attributes on what looks like a comment to the assembler.  */
    16  # ifdef HAVE_SECTION_QUOTES
    17 -#  define __sec_comment "\"\n\t#\""
    18 +#  define __sec_comment "\"\n#APP\n\t#\""
    19  # else
    20 -#  define __sec_comment "\n\t#"
    21 +#  define __sec_comment "\n#APP\n\t#"
    22  # endif
    23  # define link_warning(symbol, msg) \
    24    __make_section_unallocated (".gnu.warning." #symbol) \