configure

gcc-2.95.3 Linux下最常用的C编译器

else
  echo "$ac_err" >&5
  echo "configure: failed program was:" >&5
  cat conftest.$ac_ext >&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>&6
  :
else
  echo "$ac_t""no" 1>&6
{ echo "configure: error: Can't find stdio.h.
You must have a usable C system for the target already installed, at least
including headers and, preferably, the library, before you can configure
the G77 runtime system.  If necessary, install gcc now with \`LANGUAGES=c',
then the target library, then build with \`LANGUAGES=f77'." 1>&2; exit 1; }
fi


echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
echo "configure:903: checking for ANSI C header files" >&5
if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 908 "configure"
#include "confdefs.h"
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <float.h>
EOF
ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
{ (eval echo configure:916: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
if test -z "$ac_err"; then
  rm -rf conftest*
  ac_cv_header_stdc=yes
else
  echo "$ac_err" >&5
  echo "configure: failed program was:" >&5
  cat conftest.$ac_ext >&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 933 "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 951 "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 972 "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
if { (eval echo configure:983: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
then
  :
else
  echo "configure: failed program was:" >&5
  cat conftest.$ac_ext >&5
  rm -fr conftest*
  ac_cv_header_stdc=no
fi
rm -fr conftest*
fi

fi
fi

echo "$ac_t""$ac_cv_header_stdc" 1>&6
if test $ac_cv_header_stdc = yes; then
  cat >> confdefs.h <<\EOF
#define STDC_HEADERS 1
EOF

fi


echo $ac_n "checking for posix""... $ac_c" 1>&6
echo "configure:1008: checking for posix" >&5
if eval "test \"`echo '$''{'g77_cv_header_posix'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1013 "configure"
#include "confdefs.h"
#include <sys/types.h>
#include <unistd.h>
#ifdef _POSIX_VERSION
  yes
#endif

EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "yes" >/dev/null 2>&1; then
  rm -rf conftest*
  g77_cv_header_posix=yes
else
  rm -rf conftest*
  g77_cv_header_posix=no
fi
rm -f conftest*

fi

echo "$ac_t""$g77_cv_header_posix" 1>&6

# We can rely on the GNU library being posix-ish.  I guess checking the 
# header isn't actually like checking the functions, though...
echo $ac_n "checking for GNU library""... $ac_c" 1>&6
echo "configure:1039: checking for GNU library" >&5
if eval "test \"`echo '$''{'g77_cv_lib_gnu'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1044 "configure"
#include "confdefs.h"
#include <stdio.h>
#ifdef __GNU_LIBRARY__
  yes
#endif

EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "yes" >/dev/null 2>&1; then
  rm -rf conftest*
  g77_cv_lib_gnu=yes
else
  rm -rf conftest*
  g77_cv_lib_gnu=no
fi
rm -f conftest*

fi

echo "$ac_t""$g77_cv_lib_gnu" 1>&6

# Apparently cygwin needs to be special-cased.
echo $ac_n "checking for cyg\`win'32""... $ac_c" 1>&6
echo "configure:1068: checking for cyg\`win'32" >&5
if eval "test \"`echo '$''{'g77_cv_sys_cygwin32'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1073 "configure"
#include "confdefs.h"
#ifdef __CYGWIN32__
  yes
#endif

EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "yes" >/dev/null 2>&1; then
  rm -rf conftest*
  g77_cv_sys_cygwin32=yes
else
  rm -rf conftest*
  g77_cv_sys_cygwin32=no
fi
rm -f conftest*

fi

echo "$ac_t""$g77_cv_sys_cygwin32" 1>&6

# ditto for mingw32.
echo $ac_n "checking for mingw32""... $ac_c" 1>&6
echo "configure:1096: checking for mingw32" >&5
if eval "test \"`echo '$''{'g77_cv_sys_mingw32'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1101 "configure"
#include "confdefs.h"
#ifdef __MINGW32__
  yes
#endif

EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "yes" >/dev/null 2>&1; then
  rm -rf conftest*
  g77_cv_sys_mingw32=yes
else
  rm -rf conftest*
  g77_cv_sys_mingw32=no
fi
rm -f conftest*

fi

echo "$ac_t""$g77_cv_sys_mingw32" 1>&6


ac_safe=`echo "fcntl.h" | sed 'y%./+-%__p_%'`
echo $ac_n "checking for fcntl.h""... $ac_c" 1>&6
echo "configure:1125: checking for fcntl.h" >&5
if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1130 "configure"
#include "confdefs.h"
#include <fcntl.h>
EOF
ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
{ (eval echo configure:1135: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
if test -z "$ac_err"; then
  rm -rf conftest*
  eval "ac_cv_header_$ac_safe=yes"
else
  echo "$ac_err" >&5
  echo "configure: failed program was:" >&5
  cat conftest.$ac_ext >&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>&6
  test $g77_cv_header_posix = yes && cat >> confdefs.h <<\EOF
#define _POSIX_SOURCE 1
EOF

else
  echo "$ac_t""no" 1>&6
cat >> confdefs.h <<\EOF
#define NO_FCNTL 1
EOF
 cat >> confdefs.h <<\EOF
#define OPEN_DECL 1
EOF

fi


echo $ac_n "checking for working const""... $ac_c" 1>&6
echo "configure:1168: checking for working const" >&5
if eval "test \"`echo '$''{'ac_cv_c_const'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1173 "configure"
#include "confdefs.h"

int main() {

/* Ultrix mips cc rejects this.  */
typedef int charset[2]; const charset x;
/* SunOS 4.1.1 cc rejects this.  */
char const *const *ccp;
char **p;
/* NEC SVR4.0.2 mips cc rejects this.  */
struct point {int x, y;};
static struct point const zero = {0,0};
/* AIX XL C 1.02.0.0 rejects this.
   It does not let you subtract one const X* pointer from another in an arm
   of an if-expression whose if-part is not a constant expression */
const char *g = "string";
ccp = &g + (g ? g-g : 0);
/* HPUX 7.0 cc rejects these. */
++ccp;
p = (char**) ccp;
ccp = (char const *const *) p;
{ /* SCO 3.2v4 cc rejects this.  */
  char *t;
  char const *s = 0 ? (char *) 0 : (char const *) 0;

  *t++ = 0;
}
{ /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
  int x[] = {25, 17};
  const int *foo = &x[0];
  ++foo;
}
{ /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
  typedef const int *iptr;
  iptr p = 0;
  ++p;
}
{ /* AIX XL C 1.02.0.0 rejects this saying
     "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
  struct s { int j; const int *ap[3]; };
  struct s *b; b->j = 5;
}
{ /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
  const int foo = 10;
}

; return 0; }
EOF
if { (eval echo configure:1222: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
  rm -rf conftest*
  ac_cv_c_const=yes
else
  echo "configure: failed program was:" >&5
  cat conftest.$ac_ext >&5
  rm -rf conftest*
  ac_cv_c_const=no
fi
rm -f conftest*
fi

echo "$ac_t""$ac_cv_c_const" 1>&6
if test $ac_cv_c_const = no; then
  cat >> confdefs.h <<\EOF
#define const 
EOF

fi

echo $ac_n "checking for size_t""... $ac_c" 1>&6
echo "configure:1243: checking for size_t" >&5
if eval "test \"`echo '$''{'ac_cv_type_size_t'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1248 "configure"
#include "confdefs.h"
#include <sys/types.h>
#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif
EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "(^|[^a-zA-Z_0-9])size_t[^a-zA-Z_0-9]" >/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>&6
if test $ac_cv_type_size_t = no; then
  cat >> confdefs.h <<\EOF
#define size_t unsigned
EOF

fi



# This should always succeed on unix.
# Apparently positive result on cygwin loses re. NON_UNIX_STDIO
# (as of cygwin b18). Likewise on mingw.
echo $ac_n "checking for fstat""... $ac_c" 1>&6
echo "configure:1281: checking for fstat" >&5
if eval "test \"`echo '$''{'ac_cv_func_fstat'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 1286 "configure"
#include "confdefs.h"
/* System header to define __stub macros and hopefully few prototypes,
    which can conflict with char fstat(); below.  */
#include <assert.h>
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char fstat();

int main() {

/* 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_fstat) || defined (__stub___fstat)
choke me
#else
fstat();
#endif

; return 0; }
EOF
if { (eval echo configure:1309: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
  rm -rf conftest*
  eval "ac_cv_func_fstat=yes"
else
  echo "configure: failed program was:" >&5
  cat conftest.$ac_ext >&5
  rm -rf conftest*
  eval "ac_cv_func_fstat=no"
fi
rm -f conftest*