From 4d4473645282ded9c162611b8a658ad34671c824 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Tue, 3 Aug 2004 20:36:23 +0000 Subject: [PATCH] acinclude.m4 (AC_FUNC_MMAP_BLACKLIST): Check for and mmap() explicitly instead of relying on preset... 2004-07-30 Maciej W. Rozycki * acinclude.m4 (AC_FUNC_MMAP_BLACKLIST): Check for and mmap() explicitly instead of relying on preset autoconf cache variables. * aclocal.m4: Regenerate. * configure: Regenerate. From-SVN: r85500 --- libffi/ChangeLog | 8 ++ libffi/acinclude.m4 | 8 +- libffi/configure | 243 +++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 255 insertions(+), 4 deletions(-) diff --git a/libffi/ChangeLog b/libffi/ChangeLog index 30d95482cd9..edfe44320fe 100644 --- a/libffi/ChangeLog +++ b/libffi/ChangeLog @@ -1,3 +1,11 @@ +2004-07-30 Maciej W. Rozycki + + * acinclude.m4 (AC_FUNC_MMAP_BLACKLIST): Check for + and mmap() explicitly instead of relying on preset autoconf cache + variables. + * aclocal.m4: Regenerate. + * configure: Regenerate. + 2004-07-11 Ulrich Weigand * src/s390/ffi.c (ffi_prep_args): Fix C aliasing violation. diff --git a/libffi/acinclude.m4 b/libffi/acinclude.m4 index 90896098c70..61187cfa564 100644 --- a/libffi/acinclude.m4 +++ b/libffi/acinclude.m4 @@ -11,8 +11,12 @@ AC_SUBST(LIBTOOL) # mmap(2) blacklisting. Some platforms provide the mmap library routine # but don't support all of the features we need from it. AC_DEFUN([AC_FUNC_MMAP_BLACKLIST], -[if test $ac_cv_header_sys_mman_h != yes \ - || test $ac_cv_func_mmap != yes; then +[ +AC_CHECK_HEADER([sys/mman.h], + [libffi_header_sys_mman_h=yes], [libffi_header_sys_mman_h=no]) +AC_CHECK_FUNC([mmap], [libffi_func_mmap=yes], [libffi_func_mmap=no]) +if test "$libffi_header_sys_mman_h" != yes \ + || test "$libffi_func_mmap" != yes; then ac_cv_func_mmap_file=no ac_cv_func_mmap_dev_zero=no ac_cv_func_mmap_anon=no diff --git a/libffi/configure b/libffi/configure index 2ab015fe493..fe7f7d1b5d7 100755 --- a/libffi/configure +++ b/libffi/configure @@ -4883,8 +4883,247 @@ _ACEOF fi done -if test $ac_cv_header_sys_mman_h != yes \ - || test $ac_cv_func_mmap != yes; then + +if test "${ac_cv_header_sys_mman_h+set}" = set; then + echo "$as_me:$LINENO: checking for sys/mman.h" >&5 +echo $ECHO_N "checking for sys/mman.h... $ECHO_C" >&6 +if test "${ac_cv_header_sys_mman_h+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +fi +echo "$as_me:$LINENO: result: $ac_cv_header_sys_mman_h" >&5 +echo "${ECHO_T}$ac_cv_header_sys_mman_h" >&6 +else + # Is the header compilable? +echo "$as_me:$LINENO: checking sys/mman.h usability" >&5 +echo $ECHO_N "checking sys/mman.h usability... $ECHO_C" >&6 +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_includes_default +#include +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_header_compiler=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_header_compiler=no +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 +echo "${ECHO_T}$ac_header_compiler" >&6 + +# Is the header present? +echo "$as_me:$LINENO: checking sys/mman.h presence" >&5 +echo $ECHO_N "checking sys/mman.h presence... $ECHO_C" >&6 +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + ac_header_preproc=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_header_preproc=no +fi +rm -f conftest.err conftest.$ac_ext +echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 +echo "${ECHO_T}$ac_header_preproc" >&6 + +# So? What about this header? +case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in + yes:no: ) + { echo "$as_me:$LINENO: WARNING: sys/mman.h: accepted by the compiler, rejected by the preprocessor!" >&5 +echo "$as_me: WARNING: sys/mman.h: accepted by the compiler, rejected by the preprocessor!" >&2;} + { echo "$as_me:$LINENO: WARNING: sys/mman.h: proceeding with the compiler's result" >&5 +echo "$as_me: WARNING: sys/mman.h: proceeding with the compiler's result" >&2;} + ac_header_preproc=yes + ;; + no:yes:* ) + { echo "$as_me:$LINENO: WARNING: sys/mman.h: present but cannot be compiled" >&5 +echo "$as_me: WARNING: sys/mman.h: present but cannot be compiled" >&2;} + { echo "$as_me:$LINENO: WARNING: sys/mman.h: check for missing prerequisite headers?" >&5 +echo "$as_me: WARNING: sys/mman.h: check for missing prerequisite headers?" >&2;} + { echo "$as_me:$LINENO: WARNING: sys/mman.h: see the Autoconf documentation" >&5 +echo "$as_me: WARNING: sys/mman.h: see the Autoconf documentation" >&2;} + { echo "$as_me:$LINENO: WARNING: sys/mman.h: section \"Present But Cannot Be Compiled\"" >&5 +echo "$as_me: WARNING: sys/mman.h: section \"Present But Cannot Be Compiled\"" >&2;} + { echo "$as_me:$LINENO: WARNING: sys/mman.h: proceeding with the preprocessor's result" >&5 +echo "$as_me: WARNING: sys/mman.h: proceeding with the preprocessor's result" >&2;} + { echo "$as_me:$LINENO: WARNING: sys/mman.h: in the future, the compiler will take precedence" >&5 +echo "$as_me: WARNING: sys/mman.h: in the future, the compiler will take precedence" >&2;} + ( + cat <<\_ASBOX +## ------------------------------------------- ## +## Report this to http://gcc.gnu.org/bugs.html ## +## ------------------------------------------- ## +_ASBOX + ) | + sed "s/^/$as_me: WARNING: /" >&2 + ;; +esac +echo "$as_me:$LINENO: checking for sys/mman.h" >&5 +echo $ECHO_N "checking for sys/mman.h... $ECHO_C" >&6 +if test "${ac_cv_header_sys_mman_h+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + ac_cv_header_sys_mman_h=$ac_header_preproc +fi +echo "$as_me:$LINENO: result: $ac_cv_header_sys_mman_h" >&5 +echo "${ECHO_T}$ac_cv_header_sys_mman_h" >&6 + +fi +if test $ac_cv_header_sys_mman_h = yes; then + libffi_header_sys_mman_h=yes +else + libffi_header_sys_mman_h=no +fi + + +echo "$as_me:$LINENO: checking for mmap" >&5 +echo $ECHO_N "checking for mmap... $ECHO_C" >&6 +if test "${ac_cv_func_mmap+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +/* Define mmap to an innocuous variant, in case declares mmap. + For example, HP-UX 11i declares gettimeofday. */ +#define mmap innocuous_mmap + +/* System header to define __stub macros and hopefully few prototypes, + which can conflict with char mmap (); below. + Prefer to if __STDC__ is defined, since + exists even on freestanding compilers. */ + +#ifdef __STDC__ +# include +#else +# include +#endif + +#undef mmap + +/* Override any gcc2 internal prototype to avoid an error. */ +#ifdef __cplusplus +extern "C" +{ +#endif +/* We use char because int might match the return type of a gcc2 + builtin and then its argument prototype would still apply. */ +char mmap (); +/* 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_mmap) || defined (__stub___mmap) +choke me +#else +char (*f) () = mmap; +#endif +#ifdef __cplusplus +} +#endif + +int +main () +{ +return f != mmap; + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext conftest$ac_exeext +if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5 + (eval $ac_link) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest$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 $ac_status); }; }; then + ac_cv_func_mmap=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_cv_func_mmap=no +fi +rm -f conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +fi +echo "$as_me:$LINENO: result: $ac_cv_func_mmap" >&5 +echo "${ECHO_T}$ac_cv_func_mmap" >&6 +if test $ac_cv_func_mmap = yes; then + libffi_func_mmap=yes +else + libffi_func_mmap=no +fi + +if test "$libffi_header_sys_mman_h" != yes \ + || test "$libffi_func_mmap" != yes; then ac_cv_func_mmap_file=no ac_cv_func_mmap_dev_zero=no ac_cv_func_mmap_anon=no -- 2.30.2