apr_common.m4

Apache 2.0.63 is the current stable version of the 2.0 series, and is recommended over any previous

dnl -----------------------------------------------------------------
dnl apr_common.m4: APR's general-purpose autoconf macros
dnl

dnl APR_CONFIG_NICE(filename)
dnl
dnl Saves a snapshot of the configure command-line for later reuse
dnl
AC_DEFUN(APR_CONFIG_NICE,[
  rm -f $1
  cat >$1<<EOF
#! /bin/sh
#
# Created by configure

EOF
  if test -n "$CC"; then
    echo "CC=\"$CC\"; export CC" >> $1
  fi
  if test -n "$CFLAGS"; then
    echo "CFLAGS=\"$CFLAGS\"; export CFLAGS" >> $1
  fi
  if test -n "$CPPFLAGS"; then
    echo "CPPFLAGS=\"$CPPFLAGS\"; export CPPFLAGS" >> $1
  fi
  if test -n "$LDFLAGS"; then
    echo "LDFLAGS=\"$LDFLAGS\"; export LDFLAGS" >> $1
  fi
  if test -n "$LIBS"; then
    echo "LIBS=\"$LIBS\"; export LIBS" >> $1
  fi
  if test -n "$INCLUDES"; then
    echo "INCLUDES=\"$INCLUDES\"; export INCLUDES" >> $1
  fi
  if test -n "$NOTEST_CFLAGS"; then
    echo "NOTEST_CFLAGS=\"$NOTEST_CFLAGS\"; export NOTEST_CFLAGS" >> $1
  fi
  if test -n "$NOTEST_CPPFLAGS"; then
    echo "NOTEST_CPPFLAGS=\"$NOTEST_CPPFLAGS\"; export NOTEST_CPPFLAGS" >> $1
  fi
  if test -n "$NOTEST_LDFLAGS"; then
    echo "NOTEST_LDFLAGS=\"$NOTEST_LDFLAGS\"; export NOTEST_LDFLAGS" >> $1
  fi
  if test -n "$NOTEST_LIBS"; then
    echo "NOTEST_LIBS=\"$NOTEST_LIBS\"; export NOTEST_LIBS" >> $1
  fi

  # Retrieve command-line arguments.
  eval "set x $[0] $ac_configure_args"
  shift

  for arg
  do
    APR_EXPAND_VAR(arg, $arg)
    echo "\"[$]arg\" \\" >> $1
  done
  echo '"[$]@"' >> $1
  chmod +x $1
])dnl

dnl APR_MKDIR_P_CHECK(fallback-mkdir-p)
dnl checks whether mkdir -p works
AC_DEFUN(APR_MKDIR_P_CHECK,[
  AC_CACHE_CHECK(for working mkdir -p, ac_cv_mkdir_p,[
    test -d conftestdir && rm -rf conftestdir
    mkdir -p conftestdir/somedir >/dev/null 2>&1
    if test -d conftestdir/somedir; then
      ac_cv_mkdir_p=yes
    else
      ac_cv_mkdir_p=no
    fi
    rm -rf conftestdir
  ])
  if test "$ac_cv_mkdir_p" = "yes"; then
      mkdir_p="mkdir -p"
  else
      mkdir_p="$1"
  fi
])

dnl
dnl APR_SUBDIR_CONFIG(dir [, sub-package-cmdline-args, args-to-drop])
dnl
dnl dir: directory to find configure in
dnl sub-package-cmdline-args: arguments to add to the invocation (optional)
dnl args-to-drop: arguments to drop from the invocation (optional)
dnl
dnl Note: This macro relies on ac_configure_args being set properly.
dnl
dnl The args-to-drop argument is shoved into a case statement, so
dnl multiple arguments can be separated with a |.
dnl
dnl Note: Older versions of autoconf do not single-quote args, while 2.54+
dnl places quotes around every argument.  So, if you want to drop the
dnl argument called --enable-layout, you must pass the third argument as:
dnl [--enable-layout=*|\'--enable-layout=*]
dnl
dnl Trying to optimize this is left as an exercise to the reader who wants
dnl to put up with more autoconf craziness.  I give up.
dnl
AC_DEFUN(APR_SUBDIR_CONFIG, [
  # save our work to this point; this allows the sub-package to use it
  AC_CACHE_SAVE

  echo "configuring package in $1 now"
  ac_popdir=`pwd`
  apr_config_subdirs="$1"
  test -d $1 || $mkdir_p $1
  ac_abs_srcdir=`(cd $srcdir/$1 && pwd)`
  cd $1

changequote(, )dnl
      # A "../" for each directory in /$config_subdirs.
      ac_dots=`echo $apr_config_subdirs|sed -e 's%^\./%%' -e 's%[^/]$%&/%' -e 's%[^/]*/%../%g'`
changequote([, ])dnl

  # Make the cache file pathname absolute for the subdirs
  # required to correctly handle subdirs that might actually
  # be symlinks
  case "$cache_file" in
  /*) # already absolute
    ac_sub_cache_file=$cache_file ;;
  *)  # Was relative path.
    ac_sub_cache_file="$ac_popdir/$cache_file" ;;
  esac

  ifelse($3, [], [apr_configure_args=$ac_configure_args],[
  apr_configure_args=
  apr_sep=
  for apr_configure_arg in $ac_configure_args
  do
    case "$apr_configure_arg" in
      $3)
        continue ;;
    esac
    apr_configure_args="$apr_configure_args$apr_sep'$apr_configure_arg'"
    apr_sep=" "
  done
  ])

  dnl The eval makes quoting arguments work - specifically $2 where the
  dnl quoting mechanisms used is "" rather than [].
  dnl
  dnl We need to execute another shell because some autoconf/shell combinations
  dnl will choke after doing repeated APR_SUBDIR_CONFIG()s.  (Namely Solaris
  dnl and autoconf-2.54+)
  if eval $SHELL $ac_abs_srcdir/configure $apr_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_abs_srcdir $2
  then :
    echo "$1 configured properly"
  else
    echo "configure failed for $1"
    exit 1
  fi

  cd $ac_popdir

  # grab any updates from the sub-package
  AC_CACHE_LOAD
])dnl

dnl
dnl APR_SAVE_THE_ENVIRONMENT(variable_name)
dnl
dnl Stores the variable (usually a Makefile macro) for later restoration
dnl
AC_DEFUN(APR_SAVE_THE_ENVIRONMENT,[
  apr_ste_save_$1="$$1"
])dnl

dnl
dnl APR_RESTORE_THE_ENVIRONMENT(variable_name, prefix_)
dnl
dnl Uses the previously saved variable content to figure out what configure
dnl has added to the variable, moving the new bits to prefix_variable_name
dnl and restoring the original variable contents.  This makes it possible
dnl for a user to override configure when it does something stupid.
dnl
AC_DEFUN(APR_RESTORE_THE_ENVIRONMENT,[
if test "x$apr_ste_save_$1" = "x"; then
  $2$1="$$1"
  $1=
else
  if test "x$apr_ste_save_$1" = "x$$1"; then
    $2$1=
  else
    $2$1=`echo $$1 | sed -e "s%${apr_ste_save_$1}%%"`
    $1="$apr_ste_save_$1"
  fi
fi
echo "  restoring $1 to \"$$1\""
echo "  setting $2$1 to \"$$2$1\""
AC_SUBST($2$1)
])dnl

dnl
dnl APR_SETIFNULL(variable, value)
dnl
dnl  Set variable iff it's currently null
dnl
AC_DEFUN(APR_SETIFNULL,[
  if test -z "$$1"; then
    echo "  setting $1 to \"$2\""
    $1="$2"
  fi
])dnl

dnl
dnl APR_SETVAR(variable, value)
dnl
dnl  Set variable no matter what
dnl
AC_DEFUN(APR_SETVAR,[
  echo "  forcing $1 to \"$2\""
  $1="$2"
])dnl

dnl
dnl APR_ADDTO(variable, value)
dnl
dnl  Add value to variable
dnl
AC_DEFUN(APR_ADDTO,[
  if test "x$$1" = "x"; then
    echo "  setting $1 to \"$2\""
    $1="$2"
  else
    apr_addto_bugger="$2"
    for i in $apr_addto_bugger; do
      apr_addto_duplicate="0"
      for j in $$1; do
        if test "x$i" = "x$j"; then
          apr_addto_duplicate="1"
          break
        fi
      done
      if test $apr_addto_duplicate = "0"; then
        echo "  adding \"$i\" to $1"
        $1="$$1 $i"
      fi
    done
  fi
])dnl

dnl
dnl APR_REMOVEFROM(variable, value)
dnl
dnl Remove a value from a variable
dnl
AC_DEFUN(APR_REMOVEFROM,[
  if test "x$$1" = "x$2"; then
    echo "  nulling $1"
    $1=""
  else
    apr_new_bugger=""
    apr_removed=0
    for i in $$1; do
      if test "x$i" != "x$2"; then
        apr_new_bugger="$apr_new_bugger $i"
      else
        apr_removed=1
      fi
    done
    if test $apr_removed = "1"; then
      echo "  removed \"$2\" from $1"
      $1=$apr_new_bugger
    fi
  fi
]) dnl

dnl
dnl APR_CHECK_DEFINE_FILES( symbol, header_file [header_file ...] )
dnl
AC_DEFUN(APR_CHECK_DEFINE_FILES,[
  AC_CACHE_CHECK([for $1 in $2],ac_cv_define_$1,[
    ac_cv_define_$1=no
    for curhdr in $2
    do
      AC_EGREP_CPP(YES_IS_DEFINED, [
#include <$curhdr>
#ifdef $1
YES_IS_DEFINED
#endif
      ], ac_cv_define_$1=yes)
    done
  ])
  if test "$ac_cv_define_$1" = "yes"; then
    AC_DEFINE(HAVE_$1, 1, [Define if $1 is defined])
  fi
])


dnl
dnl APR_CHECK_DEFINE(symbol, header_file)
dnl
AC_DEFUN(APR_CHECK_DEFINE,[
  AC_CACHE_CHECK([for $1 in $2],ac_cv_define_$1,[
    AC_EGREP_CPP(YES_IS_DEFINED, [
#include <$2>
#ifdef $1
YES_IS_DEFINED
#endif
    ], ac_cv_define_$1=yes, ac_cv_define_$1=no)
  ])
  if test "$ac_cv_define_$1" = "yes"; then
    AC_DEFINE(HAVE_$1, 1, [Define if $1 is defined in $2])
  fi
])

dnl
dnl APR_CHECK_APR_DEFINE( symbol )
dnl
AC_DEFUN(APR_CHECK_APR_DEFINE,[
apr_old_cppflags=$CPPFLAGS
CPPFLAGS="$CPPFLAGS $INCLUDES"
AC_EGREP_CPP(YES_IS_DEFINED, [
#include <apr.h>
#if $1
YES_IS_DEFINED
#endif
], ac_cv_define_$1=yes, ac_cv_define_$1=no)
CPPFLAGS=$apr_old_cppflags
])

dnl APR_CHECK_FILE(filename); set ac_cv_file_filename to
dnl "yes" if 'filename' is readable, else "no".
dnl @deprecated! - use AC_CHECK_FILE instead
AC_DEFUN([APR_CHECK_FILE], [
dnl Pick a safe variable name
define([apr_cvname], ac_cv_file_[]translit([$1], [./+-], [__p_]))
AC_CACHE_CHECK([for $1], [apr_cvname],
[if test -r $1; then
   apr_cvname=yes
 else
   apr_cvname=no
 fi])
])

define(APR_IFALLYES,[dnl
ac_rc=yes
for ac_spec in $1; do
    ac_type=`echo "$ac_spec" | sed -e 's/:.*$//'`
    ac_item=`echo "$ac_spec" | sed -e 's/^.*://'`
    case $ac_type in
        header )
            ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
            ac_var="ac_cv_header_$ac_item"
            ;;
        file )
            ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
            ac_var="ac_cv_file_$ac_item"
            ;;
        func )   ac_var="ac_cv_func_$ac_item"   ;;
        struct ) ac_var="ac_cv_struct_$ac_item" ;;
        define ) ac_var="ac_cv_define_$ac_item" ;;
        custom ) ac_var="$ac_item" ;;
    esac
    eval "ac_val=\$$ac_var"
    if test ".$ac_val" != .yes; then
        ac_rc=no
        break
    fi
done
if test ".$ac_rc" = .yes; then
    :
    $2
else
    :
    $3
fi
])


define(APR_BEGIN_DECISION,[dnl
ac_decision_item='$1'
ac_decision_msg='FAILED'
ac_decision=''
])


define(APR_DECIDE,[dnl
ac_decision='$1'
ac_decision_msg='$2'
ac_decision_$1=yes
ac_decision_$1_msg='$2'
])


define(APR_DECISION_OVERRIDE,[dnl
    ac_decision=''
    for ac_item in $1; do
         eval "ac_decision_this=\$ac_decision_${ac_item}"
         if test ".$ac_decision_this" = .yes; then
             ac_decision=$ac_item
             eval "ac_decision_msg=\$ac_decision_${ac_item}_msg"
         fi
    done
])


define(APR_DECISION_FORCE,[dnl
ac_decision="$1"
eval "ac_decision_msg=\"\$ac_decision_${ac_decision}_msg\""
])


define(APR_END_DECISION,[dnl
if test ".$ac_decision" = .; then
    echo "[$]0:Error: decision on $ac_decision_item failed" 1>&2
    exit 1
else
    if test ".$ac_decision_msg" = .; then
        ac_decision_msg="$ac_decision"
    fi
    AC_DEFINE_UNQUOTED(${ac_decision_item})
    AC_MSG_RESULT([decision on $ac_decision_item... $ac_decision_msg])
fi
])


dnl
dnl APR_CHECK_SIZEOF_EXTENDED(INCLUDES, TYPE [, CROSS_SIZE])
dnl
dnl A variant of AC_CHECK_SIZEOF which allows the checking of
dnl sizes of non-builtin types
dnl
AC_DEFUN(APR_CHECK_SIZEOF_EXTENDED,
[changequote(<<,>>)dnl
dnl The name to #define
define(<<AC_TYPE_NAME>>, translit(sizeof_$2, [a-z *], [A-Z_P]))dnl
dnl The cache variable
define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$2, [ *],[<p>]))dnl
changequote([, ])dnl
AC_MSG_CHECKING(size of $2)
AC_CACHE_VAL(AC_CV_NAME,
[AC_TRY_RUN([#include <stdio.h>
$1
main()
{
  FILE *f=fopen("conftestval","w");
  if (!f) exit(1);
  fprintf(f, "%d\n", sizeof($2));
  exit(0);
}], AC_CV_NAME=`cat conftestval`, AC_CV_NAME=0, ifelse([$3],,,
AC_CV_NAME=$3))])dnl
AC_MSG_RESULT($AC_CV_NAME)
AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [The size of ]$2)
undefine([AC_TYPE_NAME])dnl
undefine([AC_CV_NAME])dnl
])


dnl
dnl APR_TRY_COMPILE_NO_WARNING(INCLUDES, FUNCTION-BODY,
dnl             [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl
dnl Tries a compile test with warnings activated so that the result
dnl is false if the code doesn't compile cleanly.
dnl
AC_DEFUN(APR_TRY_COMPILE_NO_WARNING,
[if test "x$CFLAGS_WARN" = "x"; then
  apr_tcnw_flags=""
else
  apr_tcnw_flags=$CFLAGS_WARN
fi
if test "$ac_cv_prog_gcc" = "yes"; then 
  apr_tcnw_flags="$apr_tcnw_flags -Werror"
fi
changequote(', ')
cat > conftest.$ac_ext <<EOTEST
#include "confdefs.h"
'$1'
int main(int argc, const char * const *argv) {
'$2'
; return 0; }
EOTEST
changequote([, ])
if ${CC-cc} -c $CFLAGS $CPPFLAGS $apr_tcnw_flags conftest.$ac_ext 2>&AC_FD_CC ; then
  ifelse([$3], , :, [rm -rf conftest*
  $3])
else
  echo "configure: failed or warning program:" >&AC_FD_CC
  cat conftest.$ac_ext >&AC_FD_CC
  ifelse([$4], , , [rm -rf conftest*
  $4])
fi
rm -f conftest*
])dnl

dnl
dnl APR_CHECK_STRERROR_R_RC
dnl
dnl  Decide which style of retcode is used by this system's 
dnl  strerror_r().  It either returns int (0 for success, -1
dnl  for failure), or it returns a pointer to the error