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author | Maciej W. Rozycki <macro@linux-mips.org> | 2004-08-03 20:36:23 +0000 |
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committer | Nathanael Nerode <neroden@gcc.gnu.org> | 2004-08-03 20:36:23 +0000 |
commit | 4d4473645282ded9c162611b8a658ad34671c824 (patch) | |
tree | 33d61d719d255a8c77f377dd7936927e2fbf7284 /libffi/configure | |
parent | b522f768aba8391c18c16353cf42cc576ec88c06 (diff) | |
download | gcc-4d4473645282ded9c162611b8a658ad34671c824.zip gcc-4d4473645282ded9c162611b8a658ad34671c824.tar.gz gcc-4d4473645282ded9c162611b8a658ad34671c824.tar.bz2 |
acinclude.m4 (AC_FUNC_MMAP_BLACKLIST): Check for <sys/mman.h> and mmap() explicitly instead of relying on preset...
2004-07-30 Maciej W. Rozycki <macro@linux-mips.org>
* acinclude.m4 (AC_FUNC_MMAP_BLACKLIST): Check for <sys/mman.h>
and mmap() explicitly instead of relying on preset autoconf cache
variables.
* aclocal.m4: Regenerate.
* configure: Regenerate.
From-SVN: r85500
Diffstat (limited to 'libffi/configure')
-rwxr-xr-x | libffi/configure | 243 |
1 files changed, 241 insertions, 2 deletions
diff --git a/libffi/configure b/libffi/configure index 2ab015f..fe7f7d1 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. */ +$ac_includes_default +#include <sys/mman.h> +_ACEOF +rm -f conftest.$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 <sys/mman.h> +_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 <limits.h> declares mmap. + For example, HP-UX 11i <limits.h> declares gettimeofday. */ +#define mmap innocuous_mmap + +/* System header to define __stub macros and hopefully few prototypes, + which can conflict with char mmap (); below. + Prefer <limits.h> to <assert.h> if __STDC__ is defined, since + <limits.h> exists even on freestanding compilers. */ + +#ifdef __STDC__ +# include <limits.h> +#else +# include <assert.h> +#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 |