runtime, syscall: force EPOLLET to be positive

    
    The C definition is 1U << 31.  Reportedly on some systems GCC's
    -fgo-dump-spec can print this as -2147483648.
    
    Reviewed-on: https://go-review.googlesource.com/31448


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@241347 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 0 deletions

diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
index f79b5cfd7d84..3640476a434d 100755
--- a/libgo/mksysinfo.sh
+++ b/libgo/mksysinfo.sh
@@ -185,7 +185,15 @@ fi
 
 # epoll constants.
 grep '^const _EPOLL' gen-sysinfo.go |
+  grep -v EPOLLET |
   sed -e 's/^\(const \)_\(EPOLL[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
+# Make sure EPOLLET is positive.
+if grep '^const _EPOLLET = [0-9]' gen-sysinfo.go; then
+  grep '^const _EPOLLET ' gen-sysinfo.go |
+    sed -e 's/^\(const \)_\(EPOLL[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
+else
+  echo "const EPOLLET = 0x80000000" >> ${OUT}
+fi
 # Make sure EPOLLRDHUP and EPOLL_CLOEXEC are defined.
 if ! grep '^const EPOLLRDHUP' ${OUT} >/dev/null 2>&1; then
   echo "const EPOLLRDHUP = 0x2000" >> ${OUT}