3835f82183
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> ---
84 lines
1.6 KiB
Bash
84 lines
1.6 KiB
Bash
#!/bin/sh
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# Check ncurses compatibility
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# What library to link
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ldflags()
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{
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$cc -print-file-name=libncursesw.so | grep -q /
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if [ $? -eq 0 ]; then
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echo '-lncursesw'
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exit
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fi
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$cc -print-file-name=libncurses.so | grep -q /
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if [ $? -eq 0 ]; then
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echo '-lncurses'
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exit
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fi
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$cc -print-file-name=libcurses.so | grep -q /
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if [ $? -eq 0 ]; then
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echo '-lcurses'
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exit
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fi
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exit 1
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}
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# Where is ncurses.h?
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ccflags()
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{
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if [ -f /usr/include/ncurses/ncurses.h ]; then
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echo '-I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>"'
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elif [ -f /usr/include/ncurses/curses.h ]; then
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echo '-I/usr/include/ncurses -DCURSES_LOC="<ncurses/curses.h>"'
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elif [ -f /usr/include/ncurses.h ]; then
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echo '-DCURSES_LOC="<ncurses.h>"'
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else
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echo '-DCURSES_LOC="<curses.h>"'
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fi
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}
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# Temp file, try to clean up after us
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tmp=.lxdialog.tmp
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trap "rm -f $tmp" 0 1 2 3 15
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# Check if we can link to ncurses
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check() {
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echo "main() {}" | $cc -xc - -o $tmp 2> /dev/null
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if [ $? != 0 ]; then
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echo " *** Unable to find the ncurses libraries." 1>&2
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echo " *** make menuconfig require the ncurses libraries" 1>&2
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echo " *** " 1>&2
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echo " *** Install ncurses (ncurses-devel) and try again" 1>&2
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echo " *** " 1>&2
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exit 1
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fi
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}
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usage() {
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printf "Usage: $0 [-check compiler options|-header|-library]\n"
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}
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if [ $# == 0 ]; then
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usage
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exit 1
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fi
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cc=""
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case "$1" in
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"-check")
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shift
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cc="$@"
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check
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;;
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"-ccflags")
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ccflags
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;;
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"-ldflags")
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shift
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cc="$@"
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ldflags
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;;
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"*")
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usage
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exit 1
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;;
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esac
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