patches/glibc/2.7/180-gcc-4.3-sysinclude-path.patch
author Anthony Foiani <anthony.foiani@gmail.com>
Thu May 19 23:06:16 2011 +0200 (2011-05-19)
changeset 2461 ec30b191f0e3
parent 747 d3e603e7c17c
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>
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Patch pointed to by Ryan ARNOLD on the libc-help ML.
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See: http://sourceware.org/ml/libc-help/2008-06/msg00063.html
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Forwarded to crosstool-NG by Ioannis E. VENETIS:
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See: http://sourceware.org/ml/libc-help/2008-06/msg00063.html
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GCC 4.3 changed the location of some of the header files.  I don't
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understand why you'd be getting these errors while building GCC since
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it provides them.
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With regard to GLIBC, Roland checked in some changes so that the GLIBC
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build system could find the new locations of the GCC provided header
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files.
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diff -durN glibc-2.7.orig/configure.in glibc-2.7/configure.in
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--- glibc-2.7.orig/configure.in	2007-06-08 05:16:36.000000000 +0200
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+++ glibc-2.7/configure.in	2008-06-24 18:38:46.000000000 +0200
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@@ -911,8 +911,12 @@
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 # header directory and add that to the list.  NOTE: Only does the right
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 # thing on a system that doesn't need fixincludes.  (Not presently a problem.)
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 if test -n "$sysheaders"; then
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-  ccheaders=`$CC -print-file-name=include`
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-  SYSINCLUDES="-nostdinc -isystem $ccheaders \
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+  SYSINCLUDES=-nostdinc
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+  for d in include include-fixed; do
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+    i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
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+    SYSINCLUDES="$SYSINCLUDES -isystem $i"
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+  done
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+  SYSINCLUDES="$SYSINCLUDES \
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 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
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   if test -n "$CXX"; then
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     cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
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diff -durN glibc-2.7.orig/configure glibc-2.7/configure
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--- glibc-2.7.orig/configure	2008-06-24 18:35:34.000000000 +0200
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+++ glibc-2.7/configure	2008-06-24 18:38:46.000000000 +0200
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@@ -5062,8 +5062,12 @@
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 # header directory and add that to the list.  NOTE: Only does the right
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 # thing on a system that doesn't need fixincludes.  (Not presently a problem.)
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 if test -n "$sysheaders"; then
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-  ccheaders=`$CC -print-file-name=include`
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-  SYSINCLUDES="-nostdinc -isystem $ccheaders \
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+  SYSINCLUDES=-nostdinc
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+  for d in include include-fixed; do
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+    i=`$CC -print-file-name="$d"` && test "x$i" != "x$d" &&
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+    SYSINCLUDES="$SYSINCLUDES -isystem $i"
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+  done
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+  SYSINCLUDES="$SYSINCLUDES \
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 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
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   if test -n "$CXX"; then
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     cxxversion=`$CXX -dumpversion 2>&5` &&