scripts: remove . from $PATH
Add CT_SanitizePath function which removes entries referring to ., /tmp
and non-existing directories from $PATH, and call it early in the
build script.
If . is in PATH, gcc-4.4.4 build breaks:
[ALL ] checking what assembler to use...
/tmp/build/targets/arm-unknown-linux-uclibcgnueabi/build/gcc-core-static/arm-unknown-linux-uclibcgnueabi/bin/as
...
[ALL ] config.status: creating as
i.e. "as" is supposed to be the arm-unknown-linux-uclibcgnueabi cross assembler,
but config.status creates a local "as" script which is calling the
host assembler.
Signed-off-by: Johannes Stezenbach <js@sig21.net>
[Yann E. MORIN: style fixes + explanations]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from 20dd8cef1c8adff0aa3e78ae6d7acfbc45ed5a83)
1 diff -durN gcc-4.4.0.orig/gcc/doc/invoke.texi gcc-4.4.0/gcc/doc/invoke.texi
2 --- gcc-4.4.0.orig/gcc/doc/invoke.texi 2009-05-27 21:38:11.000000000 +0200
3 +++ gcc-4.4.0/gcc/doc/invoke.texi 2009-05-27 21:38:11.000000000 +0200
5 Please note the warning under @option{-fgcse} about
6 invoking @option{-O2} on programs that use computed gotos.
8 +NOTE: In Gentoo, @option{-D_FORTIFY_SOURCE=2} is set by default, and is
9 +activated when @option{-O} is set to 2 or higher. This enables additional
10 +compile-time and run-time checks for several libc functions. To disable,
11 +specify either @option{-U_FORTIFY_SOURCE} or @option{-D_FORTIFY_SOURCE=0}.
15 Optimize yet more. @option{-O3} turns on all optimizations specified
16 diff -durN gcc-4.4.0.orig/gcc/gcc.c gcc-4.4.0/gcc/gcc.c
17 --- gcc-4.4.0.orig/gcc/gcc.c 2009-03-17 22:25:59.000000000 +0100
18 +++ gcc-4.4.0/gcc/gcc.c 2009-05-27 21:38:11.000000000 +0200
20 %{H} %C %{D*&U*&A*} %{i*} %Z %i\
21 %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
22 %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
23 + %{!D_FORTIFY_SOURCE:%{!D_FORTIFY_SOURCE=*:%{!U_FORTIFY_SOURCE:-D_FORTIFY_SOURCE=2}}}\
26 /* This contains cpp options which are common with cc1_options and are passed