configure

早期freebsd实现

for hdr in dirent.h limits.h sys/dir.h stdlib.h
do
trhdr=HAVE_`echo $hdr | tr '[a-z]./' '[A-Z]__'`
echo checking for ${hdr}
cat > conftest.c <<EOF
#include <${hdr}>
EOF
err=`eval "$CPP $DEFS conftest.c 2>&1 >/dev/null"`
if test -z "$err"; then
  DEFS="$DEFS -D${trhdr}=1"
fi
rm -f conftest*
done

echo checking for 'C++ <limits.h>'
cat <<EOF >conftest.cc
#include <limits.h>
extern "C" { void exit(int); }
int main() { exit(0); } void t() { int x = INT_MIN; int y = INT_MAX; int z = UCHAR_MAX; }
EOF
if eval $cc_compile; then
  DEFS="$DEFS -DHAVE_CC_LIMITS_H=1"
fi
rm -f conftest*
echo checking for 'C++ <unistd.h>'
cat <<EOF >conftest.cc
#include <unistd.h>
extern "C" { void exit(int); }
int main() { exit(0); } void t() { read(0, 0, 0); }
EOF
if eval $cc_compile; then
  DEFS="$DEFS -DHAVE_CC_UNISTD_H=1"
fi
rm -f conftest*
echo checking for declaration of getopt in stdlib.h
cat <<EOF >conftest.cc
#include <stdlib.h>
extern "C" { void exit(int); }
int main() { exit(0); } void t() { int opt = getopt(0, 0, 0); optarg = "foo"; optind = 1; }
EOF
if eval $cc_compile; then
  DEFS="$DEFS -DSTDLIB_H_DECLARES_GETOPT=1"
fi
rm -f conftest*
echo checking for declaration of getopt in unistd.h
cat <<EOF >conftest.cc
#include <sys/types.h>
#include <unistd.h>
extern "C" { void exit(int); }
int main() { exit(0); } void t() { int opt = getopt(0, 0, 0); }
EOF
if eval $cc_compile; then
  DEFS="$DEFS -DUNISTD_H_DECLARES_GETOPT=1"
fi
rm -f conftest*

echo checking for declaration of putenv
cat <<EOF >conftest.cc
#include <stdlib.h>
extern "C" { void exit(int); }
int main() { exit(0); } void t() { putenv((char *)0); }
EOF
if eval $cc_compile; then
  DEFS="$DEFS -DSTDLIB_H_DECLARES_PUTENV=1"
fi
rm -f conftest*
echo checking for time_t
cat <<EOF >conftest.cc
#include <time.h>
extern "C" { void exit(int); }
int main() { exit(0); } void t() { time_t t = time(0); struct tm *p = localtime(&t); }
EOF
if eval $cc_compile; then
  :
else
  DEFS="$DEFS -DLONG_FOR_TIME_T=1"
fi
rm -f conftest*
echo checking for return type of signal handlers
cat > conftest.c <<EOF
#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern void (*signal ()) ();
main() { exit(0); } 
t() { int i; }
EOF
if eval $compile; then
  DEFS="$DEFS -DRETSIGTYPE=void"
else
  DEFS="$DEFS -DRETSIGTYPE=int"
fi
rm -f conftest*


echo checking for struct exception
cat > conftest.c <<EOF
#include <math.h>
main() { exit(0); } 
t() { struct exception e; }
EOF
if eval $compile; then
  DEFS="$DEFS -DHAVE_STRUCT_EXCEPTION=1"
fi
rm -f conftest*

echo checking for mmap
cat > conftest.c <<EOF
#include <sys/types.h>
#include <sys/mman.h>
main() { exit(0); } 
t() { char *p = mmap(0, 0, PROT_READ, MAP_PRIVATE, 0, 0); munmap(p, 0); }
EOF
if eval $compile; then
  DEFS="$DEFS -DHAVE_MMAP=1"
fi
rm -f conftest*

echo checking for pid_t in sys/types.h
echo '#include <sys/types.h>' > conftest.c
eval "$CPP $DEFS conftest.c > conftest.out 2>&1"
if egrep "pid_t" conftest.out >/dev/null 2>&1; then
  :
else 
  DEFS="$DEFS -Dpid_t=int"
fi
rm -f conftest*

echo checking for vfork.h
cat > conftest.c <<EOF
#include <vfork.h>
EOF
err=`eval "$CPP $DEFS conftest.c 2>&1 >/dev/null"`
if test -z "$err"; then
  DEFS="$DEFS -DHAVE_VFORK_H=1"
fi
rm -f conftest*

echo checking for working vfork
cat > conftest.c <<EOF
/* Thanks to Paul Eggert for this test.  */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
main() {
  pid_t parent = getpid();
  pid_t child = vfork();

  if (child == 0) {
    /* On sparc systems, changes by the child to local and incoming
       argument registers are propagated back to the parent.
       The compiler is told about this with #include <vfork.h>,
       but some compilers (e.g. gcc -O) don't grok <vfork.h>.
       Test for this by using lots of local variables, at least
       as many local variables as main has allocated so far
       including compiler temporaries.  4 locals are enough for
       gcc 1.40.3 on a sparc, but we use 8 to be safe.
       A buggy compiler should reuse the register of parent
       for one of the local variables, since it will think that
       parent can't possibly be used any more in this routine.
       Assigning to the local variable will thus munge parent
       in the parent process.  */
    pid_t
      p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
      p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
    /* Convince the compiler that p..p7 are live; otherwise, it might
       use the same hardware register for all 8 local variables.  */
    if (p != p1 || p != p2 || p != p3 || p != p4
	|| p != p5 || p != p6 || p != p7)
      _exit(1);

    /* On some systems (e.g. IRIX 3.3),
       vfork doesn't separate parent from child file descriptors.
       If the child closes a descriptor before it execs or exits,
       this munges the parent's descriptor as well.
       Test for this by closing stdout in the child.  */
    _exit(close(fileno(stdout)) != 0);
  } else {
    int status;
    struct stat st;

    while (wait(&status) != child)
      ;
    exit(
	 /* Was there some problem with vforking?  */
	 child < 0

	 /* Did the child fail?  (This shouldn't happen.)  */
	 || status

	 /* Did the vfork/compiler bug occur?  */
	 || parent != getpid()

	 /* Did the file descriptor bug occur?  */
	 || fstat(fileno(stdout), &st) != 0
	 );
  }
}
EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else
  DEFS="$DEFS -Dvfork=fork"
fi
rm -f conftest*

saved_libs="$LIBS"
LIBS="$LIBS -lm"
for func in fmod strtol getcwd strerror putenv
do
echo checking for ${func}
cat > conftest.c <<EOF

main() { exit(0); } 
t() { 
/* Override any gcc2 internal prototype to avoid an error.  */
extern char ${func}(); ${func}(); }
EOF
if eval $compile; then
  :
else
  LIBOBJS="$LIBOBJS ${func}.o"
fi
rm -f conftest*

done

LIBS="$saved_libs"
for func in rename mkstemp
do
trfunc=HAVE_`echo $func | tr '[a-z]' '[A-Z]'`
echo checking for ${func}
cat > conftest.c <<EOF
#include <stdio.h>
main() { exit(0); } 
t() { 
#ifdef __stub_${func}
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char ${func}(); ${func}();
#endif
 }
EOF
if eval $compile; then
  DEFS="$DEFS -D${trfunc}=1"
fi
rm -f conftest*
#endif
done

echo checking for sys_siglist
cat > conftest.c <<EOF

main() { exit(0); } 
t() { extern char *sys_siglist[]; sys_siglist[0] = 0; }
EOF
if eval $compile; then
  DEFS="$DEFS -DHAVE_SYS_SIGLIST=1"
fi
rm -f conftest*

echo checking for gcc/g++ delete bug
cat <<EOF > conftest.cc

#include <stdlib.h>
#include <stddef.h>

int testit = 0;

int main()
{
  testit = 1;
  int *p = new int;
  delete p;
  testit = 0;
  exit(1);
}

static unsigned dummy[3];

void *operator new(size_t n)
{
  if (testit) {
    dummy[1] = -(unsigned)(dummy + 2);
    return dummy + 2;
  }
  else
    return (void *)malloc(n);
}

void operator delete(void *p)
{
  if (testit) {
    if (p == dummy)
      exit(0);
  }
  else
    free(p);
}

EOF
rm -f conftest
eval $cc_compile
if test -s conftest && (./conftest) 2>/dev/null; then
  DEFS="$DEFS -DCOOKIE_BUG=1"
fi
rm -f conftest*
echo checking for cfront ANSI C INT_MIN bug
cat <<EOF > conftest.cc
#include <stdlib.h>
#ifdef HAVE_CC_LIMITS_H
#include <limits.h>
#else
#define INT_MAX 2147483647
#endif

#undef INT_MIN
#define INT_MIN (-INT_MAX-1)

int main()
{
  int z = 0;
  exit(INT_MIN < z);
}

EOF
rm -f conftest
eval $cc_compile
if test -s conftest && (./conftest) 2>/dev/null; then
  DEFS="$DEFS -DCFRONT_ANSI_BUG=1"
fi
rm -f conftest*
echo checking for new array delete syntax
cat <<EOF >conftest.cc

extern "C" { void exit(int); }
int main() { exit(0); } void t() { char *p = new char[5]; delete [] p; }
EOF
if eval $cc_compile; then
  :
else
  DEFS="$DEFS -DARRAY_DELETE_NEEDS_SIZE=1"
fi
rm -f conftest*
echo checking for traditional preprocessor
cat <<EOF >conftest.cc
#define name2(a,b) a/**/b
extern "C" { void exit(int); }
int main() { exit(0); } void t() { int name2(foo,bar); }
EOF
if eval $cc_compile; then
  DEFS="$DEFS -DTRADITIONAL_CPP=1"
fi
rm -f conftest*
echo checking for w_coredump
cat > conftest.c <<EOF

#include <sys/types.h>
#include <sys/wait.h>
main()
{
#ifdef WCOREFLAG
  exit(1);
#else
  int i = 0;
  ((union wait *)&i)->w_coredump = 1;
  exit(i != 0200);
#endif
}

EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  DEFS="$DEFS -DWCOREFLAG=0200"
fi
rm -f conftest*
test -n "${BROKEN_SPOOLER_FLAGS}" || BROKEN_SPOOLER_FLAGS=7
echo using default value of ${BROKEN_SPOOLER_FLAGS} for grops -b option


if test -z "$PAGE" && test -r $prefix/lib/groff/font/devps/DESC
then
	if grep "^paperlength 841890" \
		$prefix/lib/groff/font/devps/DESC >/dev/null 2>&1
	then
		PAGE=A4
	else
		PAGE=letter
	fi
fi
if test -z "$PAGE"
then
	dom=`awk '($1 == "dom" || $1 == "search") { print $2; exit}' \
	    /etc/resolv.conf 2>/dev/null`

	if test -z "$dom"
	then
		dom=`(domainname) 2>/dev/null | tr -d '+'`
		if test -z "$dom"
		then
			dom=`(hostname) 2>/dev/null | grep '\.'`
		fi
	fi

	# If the top-level domain is two letters and it's not `us' or `ca'
	# then they probably use A4 paper.
	case "$dom" in
	*.[Uu][Ss]|*.[Cc][Aa]) ;;
	*.[A-Za-z][A-Za-z]) PAGE=A4 ;;
	esac
fi
test -n "$PAGE" || PAGE=letter
echo guessing $PAGE size paper

if test -n "$prefix"; then
  test -z "$exec_prefix" && exec_prefix='${prefix}'
  prsub="s%^prefix\\([ 	]*\\)=\\([ 	]*\\).*$%prefix\\1=\\2$prefix%"
fi
if test -n "$exec_prefix"; then
  prsub="$prsub
s%^exec_prefix\\([ 	]*\\)=\\([ 	]*\\).*$%\
exec_prefix\\1=\\2$exec_prefix%"
fi

trap 'rm -f config.status; exit 1' 1 3 15
echo creating config.status
rm -f config.status
cat > config.status <<EOF
#!/bin/sh
# Generated automatically by configure.
# Run this file to recreate the current configuration.
# This directory was configured as follows,
# on host `(hostname || uname -n) 2>/dev/null`:
#
# $0 $*

for arg
do
  case "\$arg" in
    -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
    exec /bin/sh $0 $* ;;
    *) echo "Usage: config.status --recheck" 2>&1; exit 1 ;;
  esac
done

trap 'rm -f Makefile; exit 1' 1 3 15
CC='$CC'
CCLIBS='$CCLIBS'
CCC='$CCC'
LPR='$LPR'
LP='$LP'
LPQ='$LPQ'
PSPRINT='$PSPRINT'
DVIPRINT='$DVIPRINT'
PERLPATH='$PERLPATH'
YACC='$YACC'
RANLIB='$RANLIB'
INSTALL='$INSTALL'
INSTALL_PROGRAM='$INSTALL_PROGRAM'
INSTALL_DATA='$INSTALL_DATA'
LN_S='$LN_S'
ETAGSCCFLAG='$ETAGSCCFLAG'
SH_SCRIPT_SED_CMD='$SH_SCRIPT_SED_CMD'
CPP='$CPP'
LIBOBJS='$LIBOBJS'
BROKEN_SPOOLER_FLAGS='$BROKEN_SPOOLER_FLAGS'
PAGE='$PAGE'
LIBS='$LIBS'
srcdir='$srcdir'
DEFS='$DEFS'
prefix='$prefix'
exec_prefix='$exec_prefix'
prsub='$prsub'
EOF
cat >> config.status <<\EOF

top_srcdir=$srcdir
for file in .. Makefile; do if [ "x$file" != "x.." ]; then
  srcdir=$top_srcdir
  # Remove last slash and all that follows it.  Not all systems have dirname.
  dir=`echo $file|sed 's%/[^/][^/]*$%%'`
  if test "$dir" != "$file"; then
    test "$top_srcdir" != . && srcdir=$top_srcdir/$dir
    test ! -d $dir && mkdir $dir
  fi
  echo creating $file
  rm -f $file
  echo "# Generated automatically from `echo $file|sed 's|.*/||'`.in by configure." > $file
  sed -e "
$prsub
s%@CC@%$CC%g
s%@CCLIBS@%$CCLIBS%g
s%@CCC@%$CCC%g
s%@LPR@%$LPR%g
s%@LP@%$LP%g
s%@LPQ@%$LPQ%g
s%@PSPRINT@%$PSPRINT%g
s%@DVIPRINT@%$DVIPRINT%g
s%@PERLPATH@%$PERLPATH%g
s%@YACC@%$YACC%g
s%@RANLIB@%$RANLIB%g
s%@INSTALL@%$INSTALL%g
s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
s%@INSTALL_DATA@%$INSTALL_DATA%g
s%@LN_S@%$LN_S%g
s%@ETAGSCCFLAG@%$ETAGSCCFLAG%g
s%@SH_SCRIPT_SED_CMD@%$SH_SCRIPT_SED_CMD%g
s%@CPP@%$CPP%g
s%@LIBOBJS@%$LIBOBJS%g
s%@BROKEN_SPOOLER_FLAGS@%$BROKEN_SPOOLER_FLAGS%g
s%@PAGE@%$PAGE%g
s%@LIBS@%$LIBS%g
s%@srcdir@%$srcdir%g
s%@DEFS@%$DEFS%
" $top_srcdir/${file}.in >> $file
fi; done

EOF
chmod +x config.status
test -n "$no_create" || ./config.status