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| author | Sam Ravnborg <sam@mars.ravnborg.org> | 2006-01-21 12:03:09 +0100 |
|---|---|---|
| committer | Sam Ravnborg <sam@mars.ravnborg.org> | 2006-01-21 12:03:09 +0100 |
| commit | 3835f82183eab8b67ddda6b32c127859a546c82d (patch) | |
| tree | 25d3e5179e13548b034213c54ed0a17db448e9b2 /scripts | |
| parent | 3ee68c4af3fd7228c1be63254b9f884614f9ebb2 (diff) | |
| download | lwn-3835f82183eab8b67ddda6b32c127859a546c82d.tar.gz lwn-3835f82183eab8b67ddda6b32c127859a546c82d.zip | |
kconfig: fix /dev/null breakage
While running "make menuconfig" and "make mrproper"
some people experienced that /dev/null suddenly changed
permissions or suddenly became a regular file.
The main reason was that /dev/null was used as output
to gcc in the check-lxdialog.sh script and gcc did
some strange things with the output file; in this
case /dev/null when it errorred out.
Following patch implements a suggestion
from Bryan O'Sullivan <bos@serpentine.com> to
use gcc -print-file-name=libxxx.so.
Also the Makefile is adjusted to not resolve value of
HOST_EXTRACFLAGS and HOST_LOADLIBES until they are actually used.
This prevents us from calling gcc when running make *clean/mrproper
Thanks to Eyal Lebedinsky <eyal@eyal.emu.id.au> and
Jean Delvare <khali@linux-fr.org> for the first error reports.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/kconfig/lxdialog/Makefile | 7 | ||||
| -rw-r--r-- | scripts/kconfig/lxdialog/check-lxdialog.sh | 14 |
2 files changed, 14 insertions, 7 deletions
diff --git a/scripts/kconfig/lxdialog/Makefile b/scripts/kconfig/lxdialog/Makefile index fae3e29fc924..bbf4887cff74 100644 --- a/scripts/kconfig/lxdialog/Makefile +++ b/scripts/kconfig/lxdialog/Makefile @@ -2,8 +2,11 @@ # check-lxdialog := $(srctree)/$(src)/check-lxdialog.sh -HOST_EXTRACFLAGS:= $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) -HOST_LOADLIBES := $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC)) + +# Use reursively expanded variables so we do not call gcc unless +# we really need to do so. (Do not call gcc as part of make mrproper) +HOST_EXTRACFLAGS = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) +HOST_LOADLIBES = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC)) HOST_EXTRACFLAGS += -DLOCALE diff --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh index 448e353923f3..120d624e672c 100644 --- a/scripts/kconfig/lxdialog/check-lxdialog.sh +++ b/scripts/kconfig/lxdialog/check-lxdialog.sh @@ -4,17 +4,17 @@ # What library to link ldflags() { - echo "main() {}" | $cc -lncursesw -xc - -o /dev/null 2> /dev/null + $cc -print-file-name=libncursesw.so | grep -q / if [ $? -eq 0 ]; then echo '-lncursesw' exit fi - echo "main() {}" | $cc -lncurses -xc - -o /dev/null 2> /dev/null + $cc -print-file-name=libncurses.so | grep -q / if [ $? -eq 0 ]; then echo '-lncurses' exit fi - echo "main() {}" | $cc -lcurses -xc - -o /dev/null 2> /dev/null + $cc -print-file-name=libcurses.so | grep -q / if [ $? -eq 0 ]; then echo '-lcurses' exit @@ -36,10 +36,13 @@ ccflags() fi } -compiler="" +# Temp file, try to clean up after us +tmp=.lxdialog.tmp +trap "rm -f $tmp" 0 1 2 3 15 + # Check if we can link to ncurses check() { - echo "main() {}" | $cc -xc - -o /dev/null 2> /dev/null + echo "main() {}" | $cc -xc - -o $tmp 2> /dev/null if [ $? != 0 ]; then echo " *** Unable to find the ncurses libraries." 1>&2 echo " *** make menuconfig require the ncurses libraries" 1>&2 @@ -59,6 +62,7 @@ if [ $# == 0 ]; then exit 1 fi +cc="" case "$1" in "-check") shift |