configure

来自「包含哈希,对称以及非对称的经典算法 包含经典事例」· 代码 · 共 1,795 行 · 第 1/4 页

# Find the source files, if location was not specified.
if test -z "$srcdir"; then
  ac_srcdir_defaulted=yes
  # Try the directory containing this script, then its parent.
  ac_prog=$0
  ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'`
  test "x$ac_confdir" = "x$ac_prog" && ac_confdir=.
  srcdir=$ac_confdir
  if test ! -r $srcdir/$ac_unique_file; then
    srcdir=..
  fi
else
  ac_srcdir_defaulted=no
fi
if test ! -r $srcdir/$ac_unique_file; then
  if test "$ac_srcdir_defaulted" = yes; then
    { echo "configure: error: can not find sources in $ac_confdir or .." 1>&2; exit 1; }
  else
    { echo "configure: error: can not find sources in $srcdir" 1>&2; exit 1; }
  fi
fi
srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'`

# Prefer explicitly selected file to automatically selected ones.
if test -z "$CONFIG_SITE"; then
  if test "x$prefix" != xNONE; then
    CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
  else
    CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
  fi
fi
for ac_site_file in $CONFIG_SITE; do
  if test -r "$ac_site_file"; then
    echo "loading site script $ac_site_file"
    . "$ac_site_file"
  fi
done

if test -r "$cache_file"; then
  echo "loading cache $cache_file"
  . $cache_file
else
  echo "creating cache $cache_file"
  > $cache_file
fi

ac_ext=c
# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='echo $CPP $CPPFLAGS 1>&5;
$CPP $CPPFLAGS'
ac_compile='echo ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5;
${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5 2>&5'
ac_link='echo ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5;
${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5 2>&5'

if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
  # Stardent Vistra SVR4 grep lacks -e, says [e-mail].
  if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
    ac_n= ac_c='
' ac_t='	'
  else
    ac_n=-n ac_c= ac_t=
  fi
else
  ac_n= ac_c='\c' ac_t=
fi






# Find a compiler to use.
# Check 1) The $CC environment varaible, 2) gcc, 3) acc, and 4) cc.
# This deals with brain-damaged Sun systems that place a bogus cc or
# acc executable in the $PATH, which just prints an error and exit.
# We deal with this by actually trying to compile a trivial test program.
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
  echo $ac_n "checking For C compiler (cached)""... $ac_c" 1>&6
  CC="$ac_cv_prog_CC"
  echo "$ac_t""$CC" 1>&6
elif test -n "$CC"; then
  ac_cv_prog_CC="$CC" # Let the user override the test.
  echo $ac_n "checking For C compiler""... $ac_c" 1>&6
  echo "$ac_t""$CC" 1>&6
else
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
  echo 'main(){return 0;}' > conftest.$ac_ext
  for ac_prog in gcc acc cc; do
# Extract the first word of "$ac_prog", so it can be a program name with args.
    set dummy $ac_prog; ac_word=$2
    echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
    for ac_dir in $PATH; do
      test -z "$ac_dir" && ac_dir=.
      if test -x "$ac_dir/$ac_word"; then
        CC="$ac_prog"
        if eval $ac_compile; then
          ac_cv_prog_CC="$ac_prog"
        fi
        break
      fi
    done
    CC="$ac_cv_prog_CC"
    if test -n "$CC"; then
      echo "$ac_t""$ac_dir/$CC" 1>&6
      break;
    fi
    echo "$ac_t""no" 1>&6
  done
  if test ! -n "$CC"; then
    { echo "configure: error: no C compiler found" 1>&2; exit 1; }
  fi
  IFS="$ac_save_ifs"
  rm -f conftest*
fi


echo $ac_n "checking whether we are using GNU CC""... $ac_c" 1>&6
if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.c <<EOF
#ifdef __GNUC__
  yes;
#endif
EOF
if ${CC-cc} -E conftest.c 2>&5 | egrep yes >/dev/null 2>&1; then
  ac_cv_prog_gcc=yes
else
  ac_cv_prog_gcc=no
fi
fi

echo "$ac_t""$ac_cv_prog_gcc" 1>&6

if test $ac_cv_prog_gcc = yes; then
  if test "${CFLAGS+set}" != set; then
echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
if eval "test \"`echo '$''{'ac_cv_prog_gcc_g'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  echo 'void f(){}' > conftest.c
if test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then
  ac_cv_prog_gcc_g=yes
else
  ac_cv_prog_gcc_g=no
fi
rm -f conftest*

fi

echo "$ac_t""$ac_cv_prog_gcc_g" 1>&6
  fi

  # If we're using GCC, perform some Deep Magic to enable the result to
  # link cleanly with code compiled with a compiler that doesn't understand
  # GCC's support library (-lgcc).  Do a link, to relocatable object form,
  # with just -lgcc.  If it's not GCC, do the normal -c thing.
  # These substitutions are used in the Makefile to force that behaviour.
  GCCMAGIC1='-Wl,-r -nostdlib'
  GCCMAGIC2=-lgcc
else
  GCCMAGIC1=-c
  GCCMAGIC2=
fi



# Now, figure out the CFLAGS we want.  If the user didn't *ask*
# for CFLAGS, we're going to use some ideas of our own.
if test "$(CFLAGS+set)" != set; then

# First, remember one useful thing that was just figured out,
# namely whether the compiler can take -g with -O.  (Most compilers
# seem to do the opposite of what I want here - if you give both, -g
# overrides and disables optimization.)  This is only done for
# gcc at the moment, and the no/yes combination is possible but
# misleading
if test $ac_cv_prog_gcc$ac_cv_prog_gcc_g = yesyes; then
  CFLAGS=-g
else
  CFLAGS=""
fi

# Now, the whole raison d'e^tre of this library is that it's *fast*.
# So we are *not* happy with autoconf's normal conservative compilation
# flags.  Try to figure out what kind the compiler we're using and soup
# things up a bit.  Also turn on warnings if possible.
# If it's GCC, crank up optimization to -O6, and try to add some
# -m options, too.
# Otherwise, it gets even more ad-hoc, but the test below works for the
# SunPro C compiler and cranks it up to maximum optimization.
echo $ac_n "checking for useful tuning options (\$TUNE)""... $ac_c" 1>&6
if test $ac_cv_prog_gcc = yes; then
  : ${WARN="-Wall -W -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"}
  if test "${TUNE+set}" != set; then
    TUNE=-O6
    case `$CC -v 2>&1` in
    *gcc-lib/sparc-*)
	# Try to use the architecture-detecting tool with SunPro CC.
	if bn_tune=`(fpversion -foption) 2>/dev/null`; then
	  if test "$bn_tune" = xcg92 || test "$bn_tune" = cg92; then
	    TUNE="$TUNE -mv8"
	  elif test "$bn_tune" != xcg89 && test "$bn_tune" != cg89; then
	    TUNE="$TUNE -mv8"
	    bn_tune_guess=yes
	  fi
	else
	  TUNE="$TUNE -mv8"
	  bn_tune_guess=yes
	fi
    esac
  fi
elif $CC -flags 2>&1 | grep SunSoft >/dev/null 2>&1; then
  if test "${WARN+set}" != set; then
    if $CC -flags 2>&1 | grep 'checking' | grep '^-vc' > /dev/null 2>&1; then
      WARN=-vc
    elif $CC -flags 2>&1 | grep 'checking' | grep '^-v ' > /dev/null 2>&1; then
      WARN=-v
    fi
    if $CC -flags 2>&1 | grep '^-xstrconst' > /dev/null 2>&1; then
      WARN="${WARN}${WARN+ }-xstrconst"
    fi
  fi
  # SunPro C compiler - now grok version and platform
  if test "${TUNE+set}" != set; then
    if $CC -flags 2>&1 | grep '^-xO.*5' >/dev/null 2>&1; then
      TUNE=-xO5
    else
      TUNE=-xO4
    fi
    # Architecture: -native iv avail., else as fpversion says, else guess -mv8
    if $CC -flags 2>&1 | grep '^-native' >/dev/null 2>&1; then
      TUNE="$TUNE -native"
    elif bn_tune=`(fpversion -foption) 2>/dev/null`; then
      TUNE="$TUNE -$bn_tune"
    elif $CC -flags 2>&1 | grep '^-xcg92' >/dev/null 2>&1; then
      TUNE="$TUNE -xcg92"
      bn_tune_guess=yes
    fi
  fi
fi
bn_tune_set=${TUNE+set}
# If nothing better is available, turn on -O
: ${TUNE=-O}
echo "$ac_t""${TUNE-none}" 1>&6
if test "$bn_tune_set" != set; then
  echo "configure: warning: not optimizing heavily - try setting \$CFLAGS" 1>&2
elif test "$bn_tune_guess" = yes; then
  echo "configure: warning: architecture guessed.  If incorrect, use explicit \$TUNE." 1>&2
fi
echo $ac_n "checking for useful warning options (\$WARN)""... $ac_c" 1>&6
echo "$ac_t""${WARN-none}" 1>&6
fi 
# ^^ End of "$(CFLAGS+set)" != set condition



# Find "ranlib".  Sone systems don't have or need ranlib.  If so,
# ":" (do nothing) is used instead.
# Extract the first word of "ranlib", so it can be a program name with args.
set dummy ranlib; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  if test -n "$RANLIB"; then
  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
else
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
  for ac_dir in $PATH; do
    test -z "$ac_dir" && ac_dir=.
    if test -f $ac_dir/$ac_word; then
      if test -x $ac_dir/$ac_word; then
        ac_cv_prog_RANLIB="ranlib"
      fi
      break
    fi
  done
  IFS="$ac_save_ifs"
  test -z "$ac_cv_prog_RANLIB" && ac_cv_prog_RANLIB=":"
fi
fi
RANLIB="$ac_cv_prog_RANLIB"
if test -n "$RANLIB"; then
  echo "$ac_t""$RANLIB" 1>&6
else
  echo "$ac_t""no" 1>&6
fi



echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
# On Suns, sometimes $CPP names a directory.
if test -n "$CPP" && test -d "$CPP"; then
  CPP=
fi
if test -z "$CPP"; then
if eval "test \"`echo '$''{'ac_cv_prog_CPP'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
    # This must be in double quotes, not single quotes, because CPP may get
  # substituted into the Makefile and "${CC-cc}" will confuse make.
  CPP="${CC-cc} -E"
  # On the NeXT, cc -E runs the code through the compiler's parser,
  # not just through cpp.
  cat > conftest.$ac_ext <<EOF
#line 758 "configure"
#include "confdefs.h"
#include <assert.h>
Syntax Error
EOF
eval "$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
ac_err=`grep -v '^ *+' conftest.out`
if test -z "$ac_err"; then
  :
else
  echo "$ac_err" >&5
  rm -rf conftest*
  CPP="${CC-cc} -E -traditional-cpp"
  cat > conftest.$ac_ext <<EOF
#line 772 "configure"
#include "confdefs.h"
#include <assert.h>
Syntax Error
EOF
eval "$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
ac_err=`grep -v '^ *+' conftest.out`
if test -z "$ac_err"; then
  :
else
  echo "$ac_err" >&5
  rm -rf conftest*
  CPP=/lib/cpp
fi
rm -f conftest*
fi
rm -f conftest*
  ac_cv_prog_CPP="$CPP"
fi
  CPP="$ac_cv_prog_CPP"
else
  ac_cv_prog_CPP="$CPP"
fi
echo "$ac_t""$CPP" 1>&6

# If we cannot run a trivial program, we must be cross compiling.
echo $ac_n "checking whether cross-compiling""... $ac_c" 1>&6
if eval "test \"`echo '$''{'ac_cv_c_cross'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  if test "$cross_compiling" = yes; then
  ac_cv_c_cross=yes
else
cat > conftest.$ac_ext <<EOF
#line 806 "configure"
#include "confdefs.h"
main(){return(0);}
EOF
eval $ac_link
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  ac_cv_c_cross=no
else
  ac_cv_c_cross=yes
fi
fi
rm -fr conftest*
fi

echo "$ac_t""$ac_cv_c_cross" 1>&6
cross_compiling=$ac_cv_c_cross

echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 828 "configure"
#include "confdefs.h"
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <float.h>
EOF
eval "$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
ac_err=`grep -v '^ *+' conftest.out`
if test -z "$ac_err"; then
  rm -rf conftest*
  ac_cv_header_stdc=yes
else
  echo "$ac_err" >&5
  rm -rf conftest*
  ac_cv_header_stdc=no
fi
rm -f conftest*

if test $ac_cv_header_stdc = yes; then
  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
cat > conftest.$ac_ext <<EOF
#line 850 "configure"
#include "confdefs.h"
#include <string.h>
EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "memchr" >/dev/null 2>&1; then
  :
else
  rm -rf conftest*
  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 <<EOF
#line 868 "configure"
#include "confdefs.h"
#include <stdlib.h>
EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "free" >/dev/null 2>&1; then
  :
else
  rm -rf conftest*
  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_ext <<EOF
#line 889 "configure"
#include "confdefs.h"
#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
int main () { int i; for (i = 0; i < 256; i++)
if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
exit (0); }

EOF