configure

Util-linux 软件包包含许多工具。其中比较重要的是加载、卸载、格式化、分区和管理硬盘驱动器

eval $compile
if test -s conftest; then
        echo "#define HAVE_rpmatch" >> defines.h
        echo "You have rpmatch()"
else
        echo "You don't have rpmatch()"
fi
rm -f conftest conftest.c

#
# 2. How is [n]curses installed?
#
test_curses_h=0
have_ncurses=1
if ! ./testincl "term.h"; then
	have_ncurses=0
elif ./testincl -q "ncurses/curses.h"; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-I/usr/include/ncurses -DNCH=0" >> make_include
	echo "You have ncurses. Using <ncurses/curses.h>."
elif ./testincl -q "ncurses.h"; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-DNCH=1" >> make_include
	echo "You have ncurses. Using <ncurses.h>."
elif [ -f /usr/local/include/ncurses.h ]; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-I/usr/local/include -DNCH=1" >> make_include
	echo "You have ncurses. Using /usr/local/include/ncurses.h."
elif ./testincl -q "curses.h"; then
	test_curses_h=1
else
	have_ncurses=0
fi
#
# If we found a curses.h, test whether it is ncurses
# (It should define __NCURSES_H and NCURSES_VERSION and NCURSES_CONST ...)
#
if [ $test_curses_h = 1 ]; then
  echo "
  #include <curses.h>
  int main(){ char *c = NCURSES_VERSION; exit(0); }
  " > conftest.c
  eval $compile
  if test -s conftest; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-DNCH=0" >> make_include
	echo "You have ncurses. Using <curses.h>."
  else
	have_ncurses=0
  fi
  rm -f conftest conftest.c
fi

if [ $have_ncurses = 0 ]; then
	echo "HAVE_NCURSES=no" >> make_include
	echo "You don't have ncurses - I will not make ul and setterm."
else
	echo "LIBCURSES=-lncurses" >> make_include
	echo "#define HAVE_ncurses" >> defines.h
fi

#
# 3. Some systems have /usr/lib/termcap.so -> /usr/lib/termcap.so.2
# where however the latter file does not exist. When termcap does
# not exist, we can try to compile more with curses instead.
#
echo '
#include <termcap.h>
int main(){ exit(0); tgetnum("li"); }
' > conftest.c
LIBS=-ltermcap
eval $compile
LIBS=
if test -s conftest; then
	echo "#define HAVE_termcap" >> defines.h
	echo "HAVE_TERMCAP=yes" >> make_include
	echo "LIBTERMCAP=-ltermcap" >> make_include
	echo "You have termcap"
else
	echo "HAVE_TERMCAP=no" >> make_include
	if [ $have_ncurses = 0 ]; then
		echo "You don't have termcap - I will not make more."
	else
		echo "You don't have termcap"
	fi
fi
rm -f conftest conftest.c

#
# 4. Do we need -lcrypt?
#
echo '
#define _XOPEN_SOURCE
#include <unistd.h>
int main(){ char *c = crypt("abc","pw"); exit(0); }
' > conftest.c
eval $compile
if test -s conftest; then
	echo "NEED_LIBCRYPT=no" >> make_include
	echo "You don't need -lcrypt"
else
	echo "NEED_LIBCRYPT=yes" >> make_include
	echo "You need -lcrypt"
fi
rm -f conftest conftest.c

#
# 5. Does static compilation work?
#
echo "
int main(){ return 0; }
" > conftest.c
eval $static_compile
if test -s conftest; then
	: OK, nothing special
else
	echo "CAN_DO_STATIC=no" >> make_include
	echo "Strange... Static compilation fails here."
fi
rm -f conftest.c conftest

#
# 6. For lib/nls.h: do we have <libintl.h> and gettext() ?
#
echo '
#include <libintl.h>
int main(int a, char **v){
  if (a == -1)  /* false */
        gettext("There is no gettext man page\n");
  exit(0);
}
' > conftest.c
eval $compile
if test -s conftest; then
        echo '#define HAVE_libintl_h' >> defines.h
        echo "You have <libintl.h> and gettext()"
        echo '#define MAY_ENABLE_NLS' >> defines.h
        MAY_ENABLE_NLS=yes
else
        echo "You don't have native language support"
        MAY_ENABLE_NLS=no
fi
rm -f conftest conftest.c


#
# 7. Does xgettext exist and take the option --foreign-user?
#
# We use the bash builtin "type" here.
# I don't see an easy way to avoid it.
# Many Linux systems do not have "which". Maybe "env" can be used.
# Writing /usr/bin/xgettext is no good: one may have xgettext elsewhere.
#
if (test $MAY_ENABLE_NLS = yes && type xgettext > /dev/null 2>&1); then
	msg=`xgettext --foreign-user 2>&1 | grep unrecognized`
	if test -n "$msg"; then
		echo "FOREIGN = " >> make_include
	else
		echo "FOREIGN = --foreign-user" >> make_include
	fi
	echo "HAVE_XGETTEXT=yes" >> make_include
else
	echo "HAVE_XGETTEXT=no" >> make_include
fi


#
# 8. For err.c: do we have __progname?
# [make sure gcc -O does not optimize the access away]
#
echo "
#include <stdio.h>
extern char *__progname;
int main(){ printf(__progname); exit(0); }
" > conftest.c
eval $compile
if test -s conftest; then
        echo "#define HAVE_progname" >> defines.h
        echo "You have __progname"
else
        echo "You don't have __progname"
fi
rm -f conftest conftest.c

#
# 9. For script.c: do we have <pty.h> and openpty()?
#
echo "
#include <pty.h>
int main(){ exit(0); openpty(0, 0, 0, 0, 0); }
" > conftest.c
LIBS=-lutil
eval $compile
LIBS=
if test -s conftest; then
	echo "HAVE_OPENPTY=yes" >> make_include
	echo "#define HAVE_openpty" >> defines.h
	echo "You have <pty.h> and openpty()"
else
	echo "You don't have <pty.h> and openpty()"
fi
rm -f conftest conftest.c

#
# 10. For lib/widechar.h: do we have wide character support?
# [Do we have the headers <wchar.h>, <wctype.h>, the types wchar_t, wint_t
# and the fgetwc, fputwc, WEOF functions/macros?]
#
echo "
#include <wchar.h>
#include <wctype.h>
#include <stdio.h>
int main () {
  wchar_t wc;
  wint_t w;
  w = fgetwc(stdin);
  if (w == WEOF) exit(1);
  wc = w;
  fputwc(wc,stdout);
  exit(0);
}
" > conftest.c
eval $compile
if test -s conftest && ./conftest < conftest.c > /dev/null 2>/dev/null; then
        echo "#define ENABLE_WIDECHAR" >> defines.h
        echo "You have wide character support"
else
        echo "You don't have wide character support"
fi
rm -f conftest conftest.c

#
# 11. For pivot_root.c: does <sys/syscall.h> define SYS_pivot_root?
#
echo "
#include <sys/syscall.h>
#include <unistd.h>
int main(void)
{
    return SYS_pivot_root;
}
" >conftest.c
eval $compile
if test -s conftest; then
	echo "HAVE_PIVOT_ROOT=yes" >> make_include
	echo "You have SYS_pivot_root"
else
	echo "You don't have SYS_pivot_root"
fi
rm -f conftest conftest.c

#
# 12. For hwclock.c: does struct tm have a field tm_gmtoff?
#
echo "
#include <time.h>
#include <unistd.h>
int main(int a, char **v)
{
    struct tm *tm = localtime(0);
    if (a == -1)  /* false */
        sleep(tm->tm_gmtoff);
    exit(0);
}
" >conftest.c
eval $compile
if test -s conftest; then
        echo "#define HAVE_tm_gmtoff" >> defines.h
        echo "You have a tm_gmtoff field in struct tm"
else
        echo "You don't have a tm_gmtoff field in struct tm"
fi
rm -f conftest conftest.c

#
# 13. For nfsmount: does the output of rpcgen compile?
#
# On some systems the output of rpcgen compiles with warnings
# Here we conclude "Your rpcgen output does not compile"
# and use pregenerated files. If one wishes to use rpcgen anyway,
# just add the line "HAVE_GOOD_RPC=yes" to make_include.
#
rm -f conftest conftestx.c conftestl.c conftest.h conftest.x
rm -f conftestx.o conftestl.o
echo "
#ifdef RPC_CLNT
%#include <string.h>            /* for memset() */
#endif
%#include <asm/types.h>
typedef opaque fhandle[1];
union fhstatus switch (unsigned fhs_status) {
case 0:
        fhandle fhs_fhandle;
default:
        void;
};
typedef string dirpath<1024>;
struct ppathcnf {
    short   pc_mask[2];
};

program MOUNTPROG {
    version MOUNTVERS {
	fhstatus
	MOUNTPROC_MNT(dirpath) = 1;
    } = 2;
} = 100005;
" > conftest.x
if rpcgen -h -o conftest.h conftest.x 2> conferrs > /dev/null && \
   rpcgen -c -o conftestx.c conftest.x 2>> conferrs > /dev/null && \
   rpcgen -l -o conftestl.c conftest.x 2>> conferrs > /dev/null && \
   $CC $CFLAGS -c conftestx.c 2>> conferrs > /dev/null && \
   $CC $CFLAGS -c conftestl.c 2>> conferrs > /dev/null && \
   test ! -s conferrs
then
        echo "HAVE_GOOD_RPC=yes" >> make_include
        echo "Your rpcgen seems to work"
else
        echo "Your rpcgen output does not compile - using pregenerated code"
fi
rm -f conftest conftestx.c conftestl.c conftest.h conftest.x conferrs
rm -f conftestx.o conftestl.o

#
# 14. For fsck.cramfs, mkfs.cramfs: do we have libz?
#
echo '
#include <zlib.h>
int main(){ exit(0); crc32(0, 0, 0); }
' > conftest.c
LIBS=-lz
eval $compile
LIBS=
if test -s conftest; then
        echo "HAVE_ZLIB=yes" >> make_include
        echo "You have zlib"
else
        echo "HAVE_ZLIB=no" >> make_include
        echo "You don't have zlib"
fi
rm -f conftest conftest.c

#
# 15. For mount, do we have blkid?
# 
echo '
#include <blkid/blkid.h>
int main(){ exit(0); blkid_known_fstype("ext2"); }
' > conftest.c
LIBS="-lblkid -luuid"
eval $compile
LIBS=
if test -s conftest; then
        echo "HAVE_BLKID=yes" >> make_include
        echo "You have blkid"
else
        echo "HAVE_BLKID=no" >> make_include
        echo "You don't have blkid"
fi
rm -f conftest conftest.c