Merge changes from GCC for the config/ directory

[deliverable/binutils-gdb.git] / config / futex.m4

diff --git a/config/futex.m4 b/config/futex.m4
index e95144dd16ae1056556478929ea8a3c9849568f2..c21243854a9381fca22c6c949c4c2f8ae1a12b81 100644 (file)
--- a/config/futex.m4
+++ b/config/futex.m4
@@ -9,7 +9,7 @@ AC_DEFUN([GCC_LINUX_FUTEX],[dnl
 GCC_ENABLE(linux-futex,default, ,[use the Linux futex system call],
           permit yes|no|default)
 case "$target" in
-  *-linux*)
+  *-linux* | *-uclinux*)
     case "$enable_linux_futex" in
       default)
        # If headers don't have gettid/futex syscalls definition, then
@@ -22,6 +22,7 @@ case "$target" in
        AC_LINK_IFELSE(
         [AC_LANG_PROGRAM(
          [#include <sys/syscall.h>
+          #include <unistd.h>
           int lk;],
          [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],
          [save_LIBS="$LIBS"
@@ -48,6 +49,7 @@ If so, please configure with --disable-linux-futex])
        AC_LINK_IFELSE(
         [AC_LANG_PROGRAM(
          [#include <sys/syscall.h>
+          #include <unistd.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])])