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| author | Alexandre Oliva <oliva@adacore.com> | 2022-06-23 23:20:53 -0300 |
|---|---|---|
| committer | Alexandre Oliva <oliva@gnu.org> | 2022-06-23 23:28:14 -0300 |
| commit | 93070671eae44f24ba822383e17571a39257c637 (patch) | |
| tree | ec63cf8c4576857b089c6322d5e4a65c4d75d427 /libstdc++-v3/configure | |
| parent | 5d8a5f04acec697c893e1c2263032bc01e2c2f2b (diff) | |
| download | gcc-93070671eae44f24ba822383e17571a39257c637.tar.gz | |
libstdc++: check for openat
rtems6.0 has fdopendir, and fcntl.h defines AT_FDCWD and declares
openat, but there's no openat in libc. Adjust dir-common.h to not
assume ::openat just because of AT_FDCWD.
for libstdc++-v3/ChangeLog
* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for
openat.
* configure, config.h.in: Rebuilt.
* src/filesystem/dir-common.h (openat): Use ::openat if
_GLIBCXX_HAVE_OPENAT.
* src/filesystem/dir.cc (dir_and_pathname): Use dirfd if
_GLIBCXX_HAVE_OPENAT.
Diffstat (limited to 'libstdc++-v3/configure')
| -rwxr-xr-x | libstdc++-v3/configure | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure index 9b94fd71e42..eac60392121 100755 --- a/libstdc++-v3/configure +++ b/libstdc++-v3/configure @@ -77178,6 +77178,61 @@ $as_echo "$glibcxx_cv_dirfd" >&6; } $as_echo "#define HAVE_DIRFD 1" >>confdefs.h fi + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for openat" >&5 +$as_echo_n "checking for openat... " >&6; } +if ${glibcxx_cv_openat+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test x$gcc_no_link = xyes; then + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include <fcntl.h> +int +main () +{ +int fd = ::openat(AT_FDCWD, "", 0); + ; + return 0; +} +_ACEOF +if ac_fn_cxx_try_compile "$LINENO"; then : + glibcxx_cv_openat=yes +else + glibcxx_cv_openat=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +else + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include <fcntl.h> +int +main () +{ +int fd = ::openat(AT_FDCWD, "", 0); + ; + return 0; +} +_ACEOF +if ac_fn_cxx_try_link "$LINENO"; then : + glibcxx_cv_openat=yes +else + glibcxx_cv_openat=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +fi + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_openat" >&5 +$as_echo "$glibcxx_cv_openat" >&6; } + if test $glibcxx_cv_openat = yes; then + +$as_echo "#define HAVE_OPENAT 1" >>confdefs.h + + fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for unlinkat" >&5 $as_echo_n "checking for unlinkat... " >&6; } if ${glibcxx_cv_unlinkat+:} false; then : |