configure

flex编译器的源代码

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 830 "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 848 "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
  ac_cv_header_stdc=no
else
cat > conftest.$ac_ext <<EOF
#line 869 "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
eval $ac_link
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else
  ac_cv_header_stdc=no
fi
fi
rm -fr conftest*
fi
fi
echo "$ac_t""$ac_cv_header_stdc" 1>&4
if test $ac_cv_header_stdc = yes; then
  cat >> confdefs.h <<\EOF
#define STDC_HEADERS 1
EOF

fi

echo $ac_n "checking for size_t""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_type_size_t'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 903 "configure"
#include "confdefs.h"
#include <sys/types.h>
#if STDC_HEADERS
#include <stdlib.h>
#endif
EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "size_t" >/dev/null 2>&1; then
  rm -rf conftest*
  ac_cv_type_size_t=yes
else
  rm -rf conftest*
  ac_cv_type_size_t=no
fi
rm -f conftest*

fi
echo "$ac_t""$ac_cv_type_size_t" 1>&4
if test $ac_cv_type_size_t = no; then
  cat >> confdefs.h <<\EOF
#define size_t unsigned
EOF

fi

echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_header_stdc'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 934 "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 956 "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 974 "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
  ac_cv_header_stdc=no
else
cat > conftest.$ac_ext <<EOF
#line 995 "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
eval $ac_link
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else
  ac_cv_header_stdc=no
fi
fi
rm -fr conftest*
fi
fi
echo "$ac_t""$ac_cv_header_stdc" 1>&4
if test $ac_cv_header_stdc = yes; then
  cat >> confdefs.h <<\EOF
#define STDC_HEADERS 1
EOF

fi

for ac_hdr in string.h malloc.h sys/types.h
do
ac_safe=`echo "$ac_hdr" | tr './\055' '___'`
echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_header_$ac_safe'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 1032 "configure"
#include "confdefs.h"
#include <$ac_hdr>
EOF
eval "$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*
  eval "ac_cv_header_$ac_safe=yes"
else
  echo "$ac_err" >&5
  rm -rf conftest*
  eval "ac_cv_header_$ac_safe=no"
fi
rm -f conftest*
fi
if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
  echo "$ac_t""yes" 1>&4
    ac_tr_hdr=HAVE_`echo $ac_hdr | tr '[a-z]./\055' '[A-Z]___'`
  cat >> confdefs.h <<EOF
#define $ac_tr_hdr 1
EOF
 
else
  echo "$ac_t""no" 1>&4
fi
done


case "$YACC" in
*bison*)
  # The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments.  Useless!
echo $ac_n "checking for working alloca.h""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_header_alloca_h'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 1070 "configure"
#include "confdefs.h"
#include <alloca.h>
int main() { return 0; }
int t() {
char *p = alloca(2 * sizeof(int));
; return 0; }
EOF
if eval $ac_link; then
  rm -rf conftest*
  ac_cv_header_alloca_h=yes
else
  rm -rf conftest*
  ac_cv_header_alloca_h=no
fi
rm -f conftest*

fi
echo "$ac_t""$ac_cv_header_alloca_h" 1>&4
if test $ac_cv_header_alloca_h = yes; then
  cat >> confdefs.h <<\EOF
#define HAVE_ALLOCA_H 1
EOF

fi

echo $ac_n "checking for alloca""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_func_alloca'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 1101 "configure"
#include "confdefs.h"

#ifdef __GNUC__
# define alloca __builtin_alloca
#else
# if HAVE_ALLOCA_H
#  include <alloca.h>
# else
#  ifdef _AIX
 #pragma alloca
#  else
#   ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#   endif
#  endif
# endif
#endif

int main() { return 0; }
int t() {
char *p = (char *) alloca(1);
; return 0; }
EOF
if eval $ac_link; then
  rm -rf conftest*
  ac_cv_func_alloca=yes
else
  rm -rf conftest*
  ac_cv_func_alloca=no
fi
rm -f conftest*

fi
echo "$ac_t""$ac_cv_func_alloca" 1>&4
if test $ac_cv_func_alloca = yes; then
  cat >> confdefs.h <<\EOF
#define HAVE_ALLOCA 1
EOF

fi

if test $ac_cv_func_alloca = no; then
  # The SVR3 libPW and SVR4 libucb both contain incompatible functions
  # that cause trouble.  Some versions do not even contain alloca or
  # contain a buggy version.  If you still want to use their alloca,
  # use ar to extract alloca.o from them instead of compiling alloca.c.
  ALLOCA=alloca.o
  cat >> confdefs.h <<\EOF
#define C_ALLOCA 1
EOF


echo $ac_n "checking whether alloca needs Cray hooks""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_os_cray'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 1159 "configure"
#include "confdefs.h"
#if defined(CRAY) && ! defined(CRAY2)
webecray
#else
wenotbecray
#endif

EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "webecray" >/dev/null 2>&1; then
  rm -rf conftest*
  ac_cv_os_cray=yes
else
  rm -rf conftest*
  ac_cv_os_cray=no
fi
rm -f conftest*

fi
echo "$ac_t""$ac_cv_os_cray" 1>&4
if test $ac_cv_os_cray = yes; then
echo $ac_n "checking for _getb67""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_func__getb67'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF
#line 1186 "configure"
#include "confdefs.h"
#include <ctype.h> /* Arbitrary system header to define __stub macros. */
/* Override any gcc2 internal prototype to avoid an error.  */
char _getb67(); 

int main() { return 0; }
int t() {

/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub__getb67) || defined (__stub____getb67)
choke me
#else
_getb67();
#endif

; return 0; }
EOF
if eval $ac_link; then
  rm -rf conftest*
  eval "ac_cv_func__getb67=yes"
else
  rm -rf conftest*
  eval "ac_cv_func__getb67=no"
fi
rm -f conftest*

fi
if eval "test \"`echo '$ac_cv_func_'_getb67`\" = yes"; then
  echo "$ac_t""yes" 1>&4
  cat >> confdefs.h <<\EOF
#define CRAY_STACKSEG_END _getb67
EOF

else
  echo "$ac_t""no" 1>&4
echo $ac_n "checking for GETB67""... $ac_c" 1>&4
if eval "test \"`echo '${'ac_cv_func_GETB67'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&4
else
  cat > conftest.$ac_ext <<EOF