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# configure.lib
# a library of shell routines for simple autoconf system
#
set -e
ac_substitutes=
rm -f conftest* config.log
exec 5>config.log
cat <<EOF >&5
This file contains any messages produced by compilers etc while
running configure, to aid debugging if configure script makes a mistake.
EOF
case `echo "a\c"` in
*c*) ac_en=-n ac_ec= ;;
*) ac_en= ac_ec='\c' ;;
esac
##### Messages
ac_msg() {
echo $ac_en "$*... $ac_ec"
echo ">>> $*" >&5
}
ac_checking() {
echo $ac_en "checking $*... $ac_ec"
echo ">>> checking $*" >&5
}
ac_result() {
echo "$1"
echo "=== $1" >&5
}
ac_fatal() {
echo "configure: fatal: $*" >&2
echo "=== FATAL: $*" >&5
exit 1
}
ac_warning() {
echo "configure: warning: $*" >&2
echo "=== WARNING: $*" >&5
}
ac_ign() {
"$@" || :
}
# ac_run command...
# captures output in conftest.out
ac_run() {
# apparently UnixWare (for one) /bin/sh optimizes the following "if"
# "away", by checking if there's such a command BEFORE redirecting
# output. So error message (like "gcc: command not found") goes
# to stderr instead of to conftest.out, and `cat conftest.out' below
# fails.
if "$@" >conftest.out 2>&1; then
return 0
else
echo "==== Command invocation failed. Command line was:" >&5
echo "$*" >&5
echo "==== compiler input was:" >&5
cat conftest.c >&5
echo "==== output was:" >&5
cat conftest.out >&5
echo "====" >&5
return 1
fi
}
# common case for ac_verbose: yes/no result
ac_yesno() {
ac_checking "$1"
shift
if "$@"; then
ac_result yes
return 0
else
ac_result no
return 1
fi
}
ac_subst() {
ac_substitutes="$ac_substitutes $*"
}
ac_define() {
CDEFS="$CDEFS -D$1=${2:-1}"
}
ac_have() {
ac_what=$1; shift
if "$@"; then
ac_define HAVE_$ac_what
eval ac_have_$ac_what=yes
return 0
else
eval ac_have_$ac_what=no
return 1
fi
}
##### Compiling, linking
# run a compiler
ac_run_compiler() {
rm -f conftest*; cat >conftest.c
ac_run $CC $CFLAGS $CDEFS "$@" conftest.c
}
ac_compile() {
ac_run_compiler -c
}
ac_link() {
ac_run_compiler -o conftest $LIBS "$@"
}
ac_cpp() {
ac_run_compiler -E "$@"
}
### check for C compiler. Set $CC, $CFLAGS etc
ac_prog_c_compiler_v() {
ac_checking "for C compiler"
rm -f conftest*
echo 'int main(int argc, char **argv) { return 0; }' >conftest.c
if [ -n "$CC" ]; then
if ac_run $CC -o conftest conftest.c && ac_run ./conftest; then
ac_result "\$CC ($CC)"
else
ac_result no
ac_fatal "\$CC ($CC) is not a working compiler"
fi
else
for cc in gcc cc ; do
if ac_run $cc -o conftest conftest.c && ac_run ./conftest; then
ac_result "$cc"
CC=$cc
break
fi
done
if [ -z "$CC" ]; then
ac_result no
ac_fatal "no working C compiler found in \$PATH. please set \$CC variable"
fi
fi
if [ -z "$CFLAGS" ]; then
if ac_yesno "whenever C compiler ($CC) is GNU CC" \
ac_grep_cpp yEs_mAsTeR <<EOF
#ifdef __GNUC__
yEs_mAsTeR;
#endif
EOF
then
CFLAGS="-Wall -W -O2 -pipe"
else
CFLAGS=-O
fi
fi
cc="$CC $CFLAGS"
ccld="$cc"
if [ -n "$LDFLAGS" ]; then ccld="$ccld $LDFLAGS"; fi
if [ -n "$LIBS" ]; then ccld="$ccld $LIBS"; fi
if ac_yesno "whenever the C compiler ($ccld)
can produce executables" \
ac_compile_run <<EOF
int main() { return 0; }
EOF
then :
else
ac_fatal "no working C compiler found"
fi
LD='$(CC)'
[ -n "$AR" ] || AR=ar
[ -n "$ARFLAGS" ] || ARFLAGS=rv
[ -n "$AWK" ] || AWK=awk
ac_substitutes="$ac_substitutes CC CFLAGS CDEFS LD LDFLAGS LIBS AR ARFLAGS AWK"
}
ac_prog_ranlib_v() {
ac_checking "for ranlib"
if [ -n "$RANLIB" ]; then
ac_result "\$RANLIB ($RANLIB)"
else
ifs="$IFS"
IFS=:
for dir in $PATH; do
[ -n "$dir" ] || dir=.
if [ -f $dir/ranlib ]; then
RANLIB=ranlib
break
fi
done
IFS="$ifs"
if [ -z "$RANLIB" ]; then ac_result no; RANLIB=:
else ac_result "$RANLIB"
fi
fi
ac_substitutes="$ac_substitutes RANLIB"
}
ac_library_find_v() {
ac_checking "for libraries needed for $1"
shift
fond=
rm -f conftest*; cat >conftest.c
for lib in "$@"; do
if ac_run $CC $CFLAGS $LDFLAGS conftest.c -o conftest $LIBS $lib; then
found=y
break
fi
done
if [ ! "$found" ]; then
ac_result "not found"
return 1
fi
if [ -z "$lib" ]; then
ac_result "ok (none needed)"
else
ac_result "ok ($lib)"
LIBS="$LIBS $lib"
fi
}
ac_compile_run() {
ac_link "$@" && ac_run ./conftest
}
ac_grep_cpp() {
pattern="$1"; shift
ac_cpp "$@" && grep "$pattern" conftest.out >/dev/null
}
ac_output() {
for var in $ac_substitutes; do
eval echo "\"s|@$var@|\$$var|\""
done >conftest.sed
for file in "$@"; do
ac_msg "creating $file"
if [ -f $file.in ]; then
sed -f conftest.sed $file.in > $file.tmp
mv -f $file.tmp $file
ac_result ok
else
ac_result failed
ac_fatal "$file.in not found"
fi
done
rm -f conftest*
}
ac_config_h() {
h=${1:-config.h}
ac_msg "creating $h"
rm -f $1.tmp
echo "/* automatically generated by configure. */" > $h.tmp
echo "$CDEFS" | tr ' ' '
' | sed -e 's/^-D/#define /' -e 's/=/ /' >> $h.tmp
if [ -f $h ] && cmp -s $h.tmp $h ; then
rm -f $h.tmp
ac_result unchanged
else
mv -f $h.tmp $h
ac_result ok
fi
CDEFS=-DHAVE_CONFIG_H
}