diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 566ecb276d..e89faa0dfe 100644 --- a/configure.ac +++ b/configure.ac @@ -1901,6 +1901,23 @@ if test $libc_cv_ehdr_start = yes; then AC_DEFINE([HAVE_EHDR_START]) fi +AC_CACHE_CHECK(for __builtin_trap with no external dependencies, + libc_cv_builtin_trap, [dnl +libc_cv_builtin_trap=no +AC_TRY_COMPILE([], [__builtin_trap ()], [ +libc_undefs=`$NM -u conftest.o | + LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ + 2>&AS_MESSAGE_LOG_FD` || { + AC_MSG_ERROR([confusing output from $NM -u]) +} +echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" +if test -z "$libc_undefs"; then + libc_cv_builtin_trap=yes +fi])]) +if test $libc_cv_builtin_trap = yes; then + AC_DEFINE([HAVE_BUILTIN_TRAP]) +fi + ### End of automated tests. ### Now run sysdeps configure fragments. |