configure

美国加州大学操作系统课程实验平台Nachos

if test -n "$LD"; then
  echo "$as_me:1762: result: $LD" >&5
echo "${ECHO_T}$LD" >&6
else
  echo "$as_me:1765: result: no" >&5
echo "${ECHO_T}no" >&6
fi

fi
if test -z "$ac_cv_prog_LD"; then
  ac_ct_LD=$LD
  # Extract the first word of "ld", so it can be a program name with args.
set dummy ld; ac_word=$2
echo "$as_me:1774: checking for $ac_word" >&5
echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
if test "${ac_cv_prog_ac_ct_LD+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  if test -n "$ac_ct_LD"; then
  ac_cv_prog_ac_ct_LD="$ac_ct_LD" # Let the user override the test.
else
  ac_save_IFS=$IFS; IFS=$ac_path_separator
ac_dummy="$PATH"
for ac_dir in $ac_dummy; do
  IFS=$ac_save_IFS
  test -z "$ac_dir" && ac_dir=.
  $as_executable_p "$ac_dir/$ac_word" || continue
ac_cv_prog_ac_ct_LD="ld"
echo "$as_me:1789: found $ac_dir/$ac_word" >&5
break
done

fi
fi
ac_ct_LD=$ac_cv_prog_ac_ct_LD
if test -n "$ac_ct_LD"; then
  echo "$as_me:1797: result: $ac_ct_LD" >&5
echo "${ECHO_T}$ac_ct_LD" >&6
else
  echo "$as_me:1800: result: no" >&5
echo "${ECHO_T}no" >&6
fi

  LD=$ac_ct_LD
else
  LD="$ac_cv_prog_LD"
fi

# Checks for libraries.
# FIXME: Replace `main' with a function in `-lc':

echo "$as_me:1812: checking for main in -lc" >&5
echo $ECHO_N "checking for main in -lc... $ECHO_C" >&6
if test "${ac_cv_lib_c_main+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  ac_check_lib_save_LIBS=$LIBS
LIBS="-lc  $LIBS"
cat >conftest.$ac_ext <<_ACEOF
#line 1820 "configure"
#include "confdefs.h"

int
main ()
{
main ();
  ;
  return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:1832: \"$ac_link\"") >&5
  (eval $ac_link) 2>&5
  ac_status=$?
  echo "$as_me:1835: \$? = $ac_status" >&5
  (exit $ac_status); } &&
         { ac_try='test -s conftest$ac_exeext'
  { (eval echo "$as_me:1838: \"$ac_try\"") >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  echo "$as_me:1841: \$? = $ac_status" >&5
  (exit $ac_status); }; }; then
  ac_cv_lib_c_main=yes
else
  echo "$as_me: failed program was:" >&5
cat conftest.$ac_ext >&5
ac_cv_lib_c_main=no
fi
rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
LIBS=$ac_check_lib_save_LIBS
fi
echo "$as_me:1852: result: $ac_cv_lib_c_main" >&5
echo "${ECHO_T}$ac_cv_lib_c_main" >&6
if test $ac_cv_lib_c_main = yes; then
  cat >>confdefs.h <<EOF
#define HAVE_LIBC 1
EOF

  LIBS="-lc $LIBS"

fi

# FIXME: Replace `main' with a function in `-lpthread':

echo "$as_me:1865: checking for main in -lpthread" >&5
echo $ECHO_N "checking for main in -lpthread... $ECHO_C" >&6
if test "${ac_cv_lib_pthread_main+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  ac_check_lib_save_LIBS=$LIBS
LIBS="-lpthread  $LIBS"
cat >conftest.$ac_ext <<_ACEOF
#line 1873 "configure"
#include "confdefs.h"

int
main ()
{
main ();
  ;
  return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:1885: \"$ac_link\"") >&5
  (eval $ac_link) 2>&5
  ac_status=$?
  echo "$as_me:1888: \$? = $ac_status" >&5
  (exit $ac_status); } &&
         { ac_try='test -s conftest$ac_exeext'
  { (eval echo "$as_me:1891: \"$ac_try\"") >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  echo "$as_me:1894: \$? = $ac_status" >&5
  (exit $ac_status); }; }; then
  ac_cv_lib_pthread_main=yes
else
  echo "$as_me: failed program was:" >&5
cat conftest.$ac_ext >&5
ac_cv_lib_pthread_main=no
fi
rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
LIBS=$ac_check_lib_save_LIBS
fi
echo "$as_me:1905: result: $ac_cv_lib_pthread_main" >&5
echo "${ECHO_T}$ac_cv_lib_pthread_main" >&6
if test $ac_cv_lib_pthread_main = yes; then
  cat >>confdefs.h <<EOF
#define HAVE_LIBPTHREAD 1
EOF

  LIBS="-lpthread $LIBS"

fi

# Checks for header files.
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
echo "$as_me:1922: checking how to run the C preprocessor" >&5
echo $ECHO_N "checking how to run the C preprocessor... $ECHO_C" >&6
# On Suns, sometimes $CPP names a directory.
if test -n "$CPP" && test -d "$CPP"; then
  CPP=
fi
if test -z "$CPP"; then
  if test "${ac_cv_prog_CPP+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
      # Double quotes because CPP needs to be expanded
    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
    do
      ac_preproc_ok=false
for ac_c_preproc_warn_flag in '' yes
do
  # Use a header file that comes with gcc, so configuring glibc
  # with a fresh cross-compiler works.
  # On the NeXT, cc -E runs the code through the compiler's parser,
  # not just through cpp. "Syntax error" is here to catch this case.
  cat >conftest.$ac_ext <<_ACEOF
#line 1943 "configure"
#include "confdefs.h"
#include <assert.h>
                     Syntax error
_ACEOF
if { (eval echo "$as_me:1948: \"$ac_cpp conftest.$ac_ext\"") >&5
  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
  ac_status=$?
  egrep -v '^ *\+' conftest.er1 >conftest.err
  rm -f conftest.er1
  cat conftest.err >&5
  echo "$as_me:1954: \$? = $ac_status" >&5
  (exit $ac_status); } >/dev/null; then
  if test -s conftest.err; then
    ac_cpp_err=$ac_c_preproc_warn_flag
  else
    ac_cpp_err=
  fi
else
  ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
  :
else
  echo "$as_me: failed program was:" >&5
  cat conftest.$ac_ext >&5
  # Broken: fails on valid input.
continue
fi
rm -f conftest.err conftest.$ac_ext

  # OK, works on sane cases.  Now check whether non-existent headers
  # can be detected and how.
  cat >conftest.$ac_ext <<_ACEOF
#line 1977 "configure"
#include "confdefs.h"
#include <ac_nonexistent.h>
_ACEOF
if { (eval echo "$as_me:1981: \"$ac_cpp conftest.$ac_ext\"") >&5
  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
  ac_status=$?
  egrep -v '^ *\+' conftest.er1 >conftest.err
  rm -f conftest.er1
  cat conftest.err >&5
  echo "$as_me:1987: \$? = $ac_status" >&5
  (exit $ac_status); } >/dev/null; then
  if test -s conftest.err; then
    ac_cpp_err=$ac_c_preproc_warn_flag
  else
    ac_cpp_err=
  fi
else
  ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
  # Broken: success on invalid input.
continue
else
  echo "$as_me: failed program was:" >&5
  cat conftest.$ac_ext >&5
  # Passes both tests.
ac_preproc_ok=:
break
fi
rm -f conftest.err conftest.$ac_ext

done
# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
rm -f conftest.err conftest.$ac_ext
if $ac_preproc_ok; then
  break
fi

    done
    ac_cv_prog_CPP=$CPP

fi
  CPP=$ac_cv_prog_CPP
else
  ac_cv_prog_CPP=$CPP
fi
echo "$as_me:2024: result: $CPP" >&5
echo "${ECHO_T}$CPP" >&6
ac_preproc_ok=false
for ac_c_preproc_warn_flag in '' yes
do
  # Use a header file that comes with gcc, so configuring glibc
  # with a fresh cross-compiler works.
  # On the NeXT, cc -E runs the code through the compiler's parser,
  # not just through cpp. "Syntax error" is here to catch this case.
  cat >conftest.$ac_ext <<_ACEOF
#line 2034 "configure"
#include "confdefs.h"
#include <assert.h>
                     Syntax error
_ACEOF
if { (eval echo "$as_me:2039: \"$ac_cpp conftest.$ac_ext\"") >&5
  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
  ac_status=$?
  egrep -v '^ *\+' conftest.er1 >conftest.err
  rm -f conftest.er1
  cat conftest.err >&5
  echo "$as_me:2045: \$? = $ac_status" >&5
  (exit $ac_status); } >/dev/null; then
  if test -s conftest.err; then
    ac_cpp_err=$ac_c_preproc_warn_flag
  else
    ac_cpp_err=
  fi
else
  ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
  :
else
  echo "$as_me: failed program was:" >&5
  cat conftest.$ac_ext >&5
  # Broken: fails on valid input.
continue
fi
rm -f conftest.err conftest.$ac_ext

  # OK, works on sane cases.  Now check whether non-existent headers
  # can be detected and how.
  cat >conftest.$ac_ext <<_ACEOF
#line 2068 "configure"
#include "confdefs.h"
#include <ac_nonexistent.h>
_ACEOF
if { (eval echo "$as_me:2072: \"$ac_cpp conftest.$ac_ext\"") >&5
  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
  ac_status=$?
  egrep -v '^ *\+' conftest.er1 >conftest.err
  rm -f conftest.er1
  cat conftest.err >&5
  echo "$as_me:2078: \$? = $ac_status" >&5
  (exit $ac_status); } >/dev/null; then
  if test -s conftest.err; then
    ac_cpp_err=$ac_c_preproc_warn_flag
  else
    ac_cpp_err=
  fi
else
  ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
  # Broken: success on invalid input.
continue
else
  echo "$as_me: failed program was:" >&5
  cat conftest.$ac_ext >&5
  # Passes both tests.
ac_preproc_ok=:
break
fi
rm -f conftest.err conftest.$ac_ext

done
# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
rm -f conftest.err conftest.$ac_ext
if $ac_preproc_ok; then
  :
else
  { { echo "$as_me:2106: error: C preprocessor \"$CPP\" fails sanity check" >&5
echo "$as_me: error: C preprocessor \"$CPP\" fails sanity check" >&2;}
   { (exit 1); exit 1; }; }
fi

ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu

echo "$as_me:2117: checking for ANSI C header files" >&5
echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6
if test "${ac_cv_header_stdc+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
  cat >conftest.$ac_ext <<_ACEOF
#line 2123 "configure"
#include "confdefs.h"
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <float.h>

_ACEOF
if { (eval echo "$as_me:2131: \"$ac_cpp conftest.$ac_ext\"") >&5
  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
  ac_status=$?
  egrep -v '^ *\+' conftest.er1 >conftest.err
  rm -f conftest.er1
  cat conftest.err >&5
  echo "$as_me:2137: \$? = $ac_status" >&5
  (exit $ac_status); } >/dev/null; then
  if test -s conftest.err; then
    ac_cpp_err=$ac_c_preproc_warn_flag
  else
    ac_cpp_err=
  fi
else
  ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
  ac_cv_header_stdc=yes
else
  echo "$as_me: failed program was:" >&5
  cat conftest.$ac_ext >&5
  ac_cv_header_stdc=no
fi
rm -f conftest.err conftest.$ac_ext

if test $ac_cv_header_stdc = yes; then
  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
  cat >conftest.$ac_ext <<_ACEOF
#line 2159 "configure"
#include "confdefs.h"
#include <string.h>

_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "memchr" >/dev/null 2>&1; then
  :
else
  ac_cv_header_stdc=no
fi
rm -f conftest*

fi

if test $ac_cv_header_stdc = yes; then
  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
  cat >conftest.$ac_ext <<_ACEOF
#line 2177 "configure"
#include "confdefs.h"
#include <stdlib.h>

_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "free" >/dev/null 2>&1; then
  :
else
  ac_cv_header_stdc=no
fi
rm -f conftest*

fi

if test $ac_cv_header_stdc = yes; then
  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
  if test "$cross_compiling" = yes; then
  :
else
  cat >conftest.$ac_ex