diff options
Diffstat (limited to 'config/futex.m4')
-rw-r--r-- | config/futex.m4 | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/config/futex.m4 b/config/futex.m4 deleted file mode 100644 index e95144d..0000000 --- a/config/futex.m4 +++ /dev/null @@ -1,64 +0,0 @@ -dnl ---------------------------------------------------------------------- -dnl This whole bit snagged from libgomp. - -dnl -dnl GCC_LINUX_FUTEX -dnl (SHELL-CODE_HANDLER) -dnl -AC_DEFUN([GCC_LINUX_FUTEX],[dnl -GCC_ENABLE(linux-futex,default, ,[use the Linux futex system call], - permit yes|no|default) -case "$target" in - *-linux*) - case "$enable_linux_futex" in - default) - # If headers don't have gettid/futex syscalls definition, then - # default to no, otherwise there will be compile time failures. - # Otherwise, default to yes. If we don't detect we are - # compiled/linked against NPTL and not cross-compiling, check - # if programs are run by default against NPTL and if not, issue - # a warning. - enable_linux_futex=no - AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [#include <sys/syscall.h> - int lk;], - [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])], - [save_LIBS="$LIBS" - LIBS="-lpthread $LIBS" - AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [#ifndef _GNU_SOURCE - #define _GNU_SOURCE 1 - #endif - #include <pthread.h> - pthread_t th; void *status;], - [pthread_tryjoin_np (th, &status);])],[enable_linux_futex=yes], - [if test x$cross_compiling = xno; then - if getconf GNU_LIBPTHREAD_VERSION 2>/dev/null \ - | LC_ALL=C grep -i NPTL > /dev/null 2>/dev/null; then :; else - AC_MSG_WARN([The kernel might not support futex or gettid syscalls. -If so, please configure with --disable-linux-futex]) - fi - fi - enable_linux_futex=yes]) - LIBS="$save_LIBS"]) - ;; - yes) - AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [#include <sys/syscall.h> - int lk;], - [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],[], - [AC_MSG_ERROR([SYS_gettid and SYS_futex required for --enable-linux-futex])]) - ;; - esac - ;; - *) - enable_linux_futex=no - ;; -esac -if test x$enable_linux_futex = xyes; then - $1 -fi -]) |