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scripts/crosstool-NG.sh.in: patch regex to work with BSD grep

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BSD grep does not interpret a null alteration. It complains about an
empty sub-expression, e.g.:

$ grep --version && grep -E '^(# |)CT_' .config
grep (BSD grep) 2.5.1-FreeBSD
grep: empty (sub)expression

This patch replaces the null alteration with a zero or once quantifier
which works with both BSD & GNU grep.

$ grep --version && grep -E '^(# )?CT_' .config
grep (BSD grep) 2.5.1-FreeBSD
CT_CONFIGURE_has_xz=y
CT_CONFIGURE_has_svn=y
...
$ ggrep --version && ggrep -E '^(# )?CT_' .config
ggrep (GNU grep) 2.20
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and others, see
<http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>.
CT_CONFIGURE_has_xz=y
CT_CONFIGURE_has_svn=y
...

Signed-off-by: Jason T. Masker <jason@masker.net>
Tested-by: Andreas Bießmann <andreas@biessmann.de>
Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
This commit is contained in:
Jason T. Masker 2014-10-21 19:20:22 +02:00 committed by Bryan Hundven
parent 60b5bc4c3e
commit 10e1579799
2 changed files with 2 additions and 2 deletions
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2
kconfig/kconfig.mk
View File

@ -38,7 +38,7 @@ defconfig:
# Always be silent, the stdout an be >.config
extractconfig:
@$(awk) 'BEGIN { dump=0; } \
dump==1 && $$0~/^\[.....\][[:space:]]+(# |)CT_/ { \
dump==1 && $$0~/^\[.....\][[:space:]]+(# )?CT_/ { \
$$1=""; \
gsub("^[[:space:]]",""); \
print; \

2
scripts/crosstool-NG.sh.in
View File

@ -125,7 +125,7 @@ CT_DoLog INFO "Build started ${CT_STAR_DATE_HUMAN}"
# We really need to extract from ,config and not .config.2, as we
# do want the kconfig's values, not our mangled config with arrays.
CT_DoStep DEBUG "Dumping user-supplied crosstool-NG configuration"
CT_DoExecLog DEBUG ${grep} -E '^(# |)CT_' .config
CT_DoExecLog DEBUG ${grep} -E '^(# )?CT_' .config
CT_EndStep
CT_DoLog DEBUG "Unsetting and unexporting MAKEFLAGS"