configure.ac: Weaken the check for MMAP.
2006-04-22 Andreas Tobler <a.tobler@schweiz.ch> * configure.ac: Weaken the check for MMAP. * configure: Rebuilt. * include/config.h.in: Likewise. From-SVN: r113182
This commit is contained in:
Andreas Tobler
parent
ac6ed182ed
commit
6d0b58a9aa
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@ -1,4 +1,10 @@
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2004-04-20 Bryce McKinlay <mckinlay@redhat.com>
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2006-04-22 Andreas Tobler <a.tobler@schweiz.ch>
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* configure.ac: Weaken the check for MMAP.
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* configure: Rebuilt.
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* include/config.h.in: Likewise.
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2006-04-20 Bryce McKinlay <mckinlay@redhat.com>
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PR libgcj/27170
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* gnu/gcj/runtime/natSharedLibLoader.cc: Include gc.h to override
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@ -16248,170 +16248,14 @@ _ACEOF
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fi
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if test x$gcc_no_link = xyes; then
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if test "x${ac_cv_func_mmap_fixed_mapped+set}" != xset; then
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ac_cv_func_mmap_fixed_mapped=no
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fi
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fi
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if test "x${ac_cv_func_mmap_fixed_mapped}" != xno; then
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# AC_FUNC_MMAP goes to far and checks for mmap fixed, we do only need mmap
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# at a mmap selected address. See
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# gnu/java/nio/channels/natFileChannelPosix.cc
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for ac_header in stdlib.h unistd.h
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do
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as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
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if eval "test \"\${$as_ac_Header+set}\" = set"; then
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echo "$as_me:$LINENO: checking for $ac_header" >&5
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echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
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if eval "test \"\${$as_ac_Header+set}\" = set"; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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fi
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echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
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echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
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else
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# Is the header compilable?
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echo "$as_me:$LINENO: checking $ac_header usability" >&5
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echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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$ac_includes_default
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#include <$ac_header>
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_ACEOF
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rm -f conftest.$ac_objext
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if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
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(eval $ac_compile) 2>conftest.er1
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ac_status=$?
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grep -v '^ *+' conftest.er1 >conftest.err
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rm -f conftest.er1
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cat conftest.err >&5
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } &&
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{ ac_try='test -z "$ac_c_werror_flag"
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|| test ! -s conftest.err'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } &&
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{ ac_try='test -s conftest.$ac_objext'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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ac_header_compiler=yes
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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ac_header_compiler=no
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fi
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rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
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echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
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echo "${ECHO_T}$ac_header_compiler" >&6
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# Is the header present?
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echo "$as_me:$LINENO: checking $ac_header presence" >&5
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echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <$ac_header>
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_ACEOF
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if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
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(eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
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ac_status=$?
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grep -v '^ *+' conftest.er1 >conftest.err
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rm -f conftest.er1
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cat conftest.err >&5
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } >/dev/null; then
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if test -s conftest.err; then
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ac_cpp_err=$ac_c_preproc_warn_flag
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ac_cpp_err=$ac_cpp_err$ac_c_werror_flag
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else
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ac_cpp_err=
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fi
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else
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ac_cpp_err=yes
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fi
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if test -z "$ac_cpp_err"; then
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ac_header_preproc=yes
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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ac_header_preproc=no
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fi
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rm -f conftest.err conftest.$ac_ext
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echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
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echo "${ECHO_T}$ac_header_preproc" >&6
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# So? What about this header?
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case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
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yes:no: )
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{ echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
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echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
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{ echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
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echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
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ac_header_preproc=yes
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;;
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no:yes:* )
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{ echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
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echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
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{ echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
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echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
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{ echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
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echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
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{ echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5
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echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;}
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{ echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
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echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
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{ echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
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echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
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(
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cat <<\_ASBOX
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## ---------------------------------- ##
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## Report this to the libjava lists. ##
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## ---------------------------------- ##
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_ASBOX
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) |
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sed "s/^/$as_me: WARNING: /" >&2
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;;
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esac
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echo "$as_me:$LINENO: checking for $ac_header" >&5
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echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
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if eval "test \"\${$as_ac_Header+set}\" = set"; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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eval "$as_ac_Header=\$ac_header_preproc"
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fi
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echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
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echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
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fi
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if test `eval echo '${'$as_ac_Header'}'` = yes; then
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cat >>confdefs.h <<_ACEOF
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#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
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_ACEOF
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fi
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done
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for ac_func in getpagesize
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do
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as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
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echo "$as_me:$LINENO: checking for $ac_func" >&5
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echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
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if eval "test \"\${$as_ac_var+set}\" = set"; then
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echo "$as_me:$LINENO: checking for mmap" >&5
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echo $ECHO_N "checking for mmap... $ECHO_C" >&6
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if test "${ac_cv_func_mmap_ok+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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if test x$gcc_no_link = xyes; then
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@ -16425,47 +16269,16 @@ _ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
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For example, HP-UX 11i <limits.h> declares gettimeofday. */
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#define $ac_func innocuous_$ac_func
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/* System header to define __stub macros and hopefully few prototypes,
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which can conflict with char $ac_func (); below.
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Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
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<limits.h> exists even on freestanding compilers. */
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#ifdef __STDC__
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# include <limits.h>
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#else
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# include <assert.h>
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#endif
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#undef $ac_func
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/* Override any gcc2 internal prototype to avoid an error. */
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* We use char because int might match the return type of a gcc2
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builtin and then its argument prototype would still apply. */
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char $ac_func ();
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/* The GNU C library defines this for functions which it implements
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to always fail with ENOSYS. Some functions are actually named
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something starting with __ and the normal name is an alias. */
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#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
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choke me
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#else
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char (*f) () = $ac_func;
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#endif
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#ifdef __cplusplus
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}
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#endif
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int
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main ()
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{
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return f != $ac_func;
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mmap((void *)0, 0, PROT_READ, 0, 0, 0);
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;
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return 0;
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}
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@ -16492,201 +16305,26 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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eval "$as_ac_var=yes"
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ac_cv_func_mmap_ok=yes
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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eval "$as_ac_var=no"
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ac_cv_func_mmap_ok=no
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fi
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rm -f conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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fi
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echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
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echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
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if test `eval echo '${'$as_ac_var'}'` = yes; then
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cat >>confdefs.h <<_ACEOF
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#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
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_ACEOF
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fi
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done
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echo "$as_me:$LINENO: checking for working mmap" >&5
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echo $ECHO_N "checking for working mmap... $ECHO_C" >&6
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if test "${ac_cv_func_mmap_fixed_mapped+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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if test "$cross_compiling" = yes; then
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ac_cv_func_mmap_fixed_mapped=no
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else
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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$ac_includes_default
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/* malloc might have been renamed as rpl_malloc. */
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#undef malloc
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/* Thanks to Mike Haertel and Jim Avera for this test.
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Here is a matrix of mmap possibilities:
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mmap private not fixed
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mmap private fixed at somewhere currently unmapped
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mmap private fixed at somewhere already mapped
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mmap shared not fixed
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mmap shared fixed at somewhere currently unmapped
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mmap shared fixed at somewhere already mapped
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For private mappings, we should verify that changes cannot be read()
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back from the file, nor mmap's back from the file at a different
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address. (There have been systems where private was not correctly
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implemented like the infamous i386 svr4.0, and systems where the
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VM page cache was not coherent with the file system buffer cache
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like early versions of FreeBSD and possibly contemporary NetBSD.)
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For shared mappings, we should conversely verify that changes get
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propagated back to all the places they're supposed to be.
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Grep wants private fixed already mapped.
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The main things grep needs to know about mmap are:
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* does it exist and is it safe to write into the mmap'd area
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* how to use it (BSD variants) */
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#include <fcntl.h>
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#include <sys/mman.h>
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#if !STDC_HEADERS && !HAVE_STDLIB_H
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char *malloc ();
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#endif
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/* This mess was copied from the GNU getpagesize.h. */
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#if !HAVE_GETPAGESIZE
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/* Assume that all systems that can run configure have sys/param.h. */
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# if !HAVE_SYS_PARAM_H
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# define HAVE_SYS_PARAM_H 1
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# endif
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# ifdef _SC_PAGESIZE
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# define getpagesize() sysconf(_SC_PAGESIZE)
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# else /* no _SC_PAGESIZE */
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# if HAVE_SYS_PARAM_H
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# include <sys/param.h>
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# ifdef EXEC_PAGESIZE
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# define getpagesize() EXEC_PAGESIZE
|
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# else /* no EXEC_PAGESIZE */
|
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# ifdef NBPG
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# define getpagesize() NBPG * CLSIZE
|
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# ifndef CLSIZE
|
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# define CLSIZE 1
|
||||
# endif /* no CLSIZE */
|
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# else /* no NBPG */
|
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# ifdef NBPC
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# define getpagesize() NBPC
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# else /* no NBPC */
|
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# ifdef PAGESIZE
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# define getpagesize() PAGESIZE
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# endif /* PAGESIZE */
|
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# endif /* no NBPC */
|
||||
# endif /* no NBPG */
|
||||
# endif /* no EXEC_PAGESIZE */
|
||||
# else /* no HAVE_SYS_PARAM_H */
|
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# define getpagesize() 8192 /* punt totally */
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# endif /* no HAVE_SYS_PARAM_H */
|
||||
# endif /* no _SC_PAGESIZE */
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|
||||
#endif /* no HAVE_GETPAGESIZE */
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|
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int
|
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main ()
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{
|
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char *data, *data2, *data3;
|
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int i, pagesize;
|
||||
int fd;
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||||
|
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pagesize = getpagesize ();
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||||
|
||||
/* First, make a file with some known garbage in it. */
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data = (char *) malloc (pagesize);
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if (!data)
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exit (1);
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for (i = 0; i < pagesize; ++i)
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*(data + i) = rand ();
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||||
umask (0);
|
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fd = creat ("conftest.mmap", 0600);
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if (fd < 0)
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exit (1);
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if (write (fd, data, pagesize) != pagesize)
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||||
exit (1);
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close (fd);
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|
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/* Next, try to mmap the file at a fixed address which already has
|
||||
something else allocated at it. If we can, also make sure that
|
||||
we see the same garbage. */
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||||
fd = open ("conftest.mmap", O_RDWR);
|
||||
if (fd < 0)
|
||||
exit (1);
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||||
data2 = (char *) malloc (2 * pagesize);
|
||||
if (!data2)
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||||
exit (1);
|
||||
data2 += (pagesize - ((long) data2 & (pagesize - 1))) & (pagesize - 1);
|
||||
if (data2 != mmap (data2, pagesize, PROT_READ | PROT_WRITE,
|
||||
MAP_PRIVATE | MAP_FIXED, fd, 0L))
|
||||
exit (1);
|
||||
for (i = 0; i < pagesize; ++i)
|
||||
if (*(data + i) != *(data2 + i))
|
||||
exit (1);
|
||||
|
||||
/* Finally, make sure that changes to the mapped area do not
|
||||
percolate back to the file as seen by read(). (This is a bug on
|
||||
some variants of i386 svr4.0.) */
|
||||
for (i = 0; i < pagesize; ++i)
|
||||
*(data2 + i) = *(data2 + i) + 1;
|
||||
data3 = (char *) malloc (pagesize);
|
||||
if (!data3)
|
||||
exit (1);
|
||||
if (read (fd, data3, pagesize) != pagesize)
|
||||
exit (1);
|
||||
for (i = 0; i < pagesize; ++i)
|
||||
if (*(data + i) != *(data3 + i))
|
||||
exit (1);
|
||||
close (fd);
|
||||
exit (0);
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest$ac_exeext
|
||||
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
|
||||
(eval $ac_link) 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); } && { ac_try='./conftest$ac_exeext'
|
||||
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
|
||||
(eval $ac_try) 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; }; then
|
||||
ac_cv_func_mmap_fixed_mapped=yes
|
||||
else
|
||||
echo "$as_me: program exited with status $ac_status" >&5
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
( exit $ac_status )
|
||||
ac_cv_func_mmap_fixed_mapped=no
|
||||
fi
|
||||
rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
fi
|
||||
echo "$as_me:$LINENO: result: $ac_cv_func_mmap_fixed_mapped" >&5
|
||||
echo "${ECHO_T}$ac_cv_func_mmap_fixed_mapped" >&6
|
||||
if test $ac_cv_func_mmap_fixed_mapped = yes; then
|
||||
echo "$as_me:$LINENO: result: $ac_cv_func_mmap_ok" >&5
|
||||
echo "${ECHO_T}$ac_cv_func_mmap_ok" >&6
|
||||
if test $ac_cv_func_mmap_ok = yes
|
||||
then
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define HAVE_MMAP 1
|
||||
_ACEOF
|
||||
|
||||
fi
|
||||
rm -f conftest.mmap
|
||||
|
||||
fi
|
||||
|
||||
for ac_prog in perl
|
||||
|
|
|
|||
|
|
@ -1346,7 +1346,31 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <time.h>]], [[struct tm tim; tim.t
|
|||
[AC_MSG_RESULT(no)])])])
|
||||
|
||||
AC_FUNC_ALLOCA
|
||||
AC_FUNC_MMAP
|
||||
|
||||
dnl Check for mmap()
|
||||
# AC_FUNC_MMAP goes to far and checks for mmap fixed, we do only need mmap
|
||||
# at a mmap selected address. See
|
||||
# gnu/java/nio/channels/natFileChannelPosix.cc
|
||||
|
||||
AC_MSG_CHECKING([for mmap])
|
||||
AC_CACHE_VAL(ac_cv_func_mmap_ok,
|
||||
[AC_TRY_LINK(
|
||||
changequote(<<, >>)dnl
|
||||
<<
|
||||
#include <unistd.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
>>,
|
||||
changequote([, ])dnl
|
||||
[mmap((void *)0, 0, PROT_READ, 0, 0, 0);],
|
||||
ac_cv_func_mmap_ok=yes,
|
||||
ac_cv_func_mmap_ok=no)] )
|
||||
AC_MSG_RESULT($ac_cv_func_mmap_ok)
|
||||
if test $ac_cv_func_mmap_ok = yes
|
||||
then
|
||||
AC_DEFINE(HAVE_MMAP, 1, [ Define to 1 if you have a working `mmap' system call w/o fixed address ability.])
|
||||
fi
|
||||
|
||||
AC_CHECK_PROGS(PERL, perl, false)
|
||||
|
||||
|
|
|
|||
|
|
@ -115,9 +115,6 @@
|
|||
/* Define if gethostname is declared in <unistd.h>. */
|
||||
#undef HAVE_GETHOSTNAME_DECL
|
||||
|
||||
/* Define to 1 if you have the `getpagesize' function. */
|
||||
#undef HAVE_GETPAGESIZE
|
||||
|
||||
/* Define to 1 if you have the `getpwuid_r' function. */
|
||||
#undef HAVE_GETPWUID_R
|
||||
|
||||
|
|
@ -187,7 +184,8 @@
|
|||
/* Define is you have 'mktime' in <time.h> */
|
||||
#undef HAVE_MKTIME
|
||||
|
||||
/* Define to 1 if you have a working `mmap' system call. */
|
||||
/* Define to 1 if you have a working `mmap' system call w/o fixed address
|
||||
ability. */
|
||||
#undef HAVE_MMAP
|
||||
|
||||
/* Define to 1 if you have the <netdb.h> header file. */
|
||||
|
|
|
|||
Loading…
Reference in New Issue