From 207c35fa9ee1cde68cb992aa2525d96fa86d1f20 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Tue, 1 Nov 2011 04:12:01 +0000
Subject: syscall: Portability code for epoll_event on GNU/Linux.

From-SVN: r180729
---
 libgo/Makefile.in | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'libgo/Makefile.in')

diff --git a/libgo/Makefile.in b/libgo/Makefile.in
index 05223a6..da7031f 100644
--- a/libgo/Makefile.in
+++ b/libgo/Makefile.in
@@ -424,9 +424,11 @@ RANLIB = @RANLIB@
 SED = @SED@
 SET_MAKE = @SET_MAKE@
 SHELL = @SHELL@
+SIZEOF_STRUCT_EPOLL_EVENT = @SIZEOF_STRUCT_EPOLL_EVENT@
 SPLIT_STACK = @SPLIT_STACK@
 STRINGOPS_FLAG = @STRINGOPS_FLAG@
 STRIP = @STRIP@
+STRUCT_EPOLL_EVENT_FD_OFFSET = @STRUCT_EPOLL_EVENT_FD_OFFSET@
 VERSION = @VERSION@
 WARN_FLAGS = @WARN_FLAGS@
 WERROR = @WERROR@
@@ -1868,7 +1870,7 @@ go_testing_script_files = \
 @LIBGO_IS_LINUX_FALSE@@LIBGO_IS_SOLARIS_TRUE@syscall_socket_file = go/syscall/socket_solaris.go
 
 # Define socket sizes and types.
-@LIBGO_IS_LINUX_TRUE@syscall_socket_file = go/syscall/socket_linux.go
+@LIBGO_IS_LINUX_TRUE@syscall_socket_file = go/syscall/socket_linux.go epoll.go
 @LIBGO_IS_386_FALSE@@LIBGO_IS_SOLARIS_TRUE@syscall_uname_file = go/syscall/libcall_uname.go
 
 # Support for uname.
@@ -4475,6 +4477,34 @@ s-sysinfo: $(srcdir)/mksysinfo.sh config.h
 	$(SHELL) $(srcdir)/../move-if-change tmp-sysinfo.go sysinfo.go
 	$(STAMP) $@
 
+# The epoll struct has an embedded union and is packed on x86_64,
+# which is too complicated for mksysinfo.sh.  We find the offset of
+# the only field we care about in configure.ac, and generate the
+# struct here.
+epoll.go: s-epoll; @true
+s-epoll: Makefile
+	rm -f epoll.go.tmp
+	echo 'package syscall' > epoll.go.tmp
+	echo 'type EpollEvent struct {' >> epoll.go.tmp
+	echo '	Events uint32' >> epoll.go.tmp
+	case "$(SIZEOF_STRUCT_EPOLL_EVENT),$(STRUCT_EPOLL_EVENT_FD_OFFSET)" in \
+	0,0) echo 1>&2 "*** struct epoll_event data.fd offset unknown"; \
+	   exit 1; ;; \
+	8,4) echo '	Fd int32' >> epoll.go.tmp; ;; \
+	12,4) echo '	Fd int32' >> epoll.go.tmp; \
+	   echo '	Pad [4]byte' >> epoll.go.tmp; ;; \
+	12,8) echo '	Pad [4]byte' >> epoll.go.tmp; \
+	   echo '	Fd int32' >> epoll.go.tmp; ;; \
+	16,8) echo '	Pad [4]byte' >> epoll.go.tmp; \
+	   echo '	Fd int32' >> epoll.go.tmp; \
+	   echo '	Pad2 [4]byte' >> epoll.go.tmp; ;; \
+	*) echo 1>&2 "*** struct epoll_event unsupported"; \
+	   exit 1; ;; \
+	esac
+	echo '}' >> epoll.go.tmp
+	$(SHELL) $(srcdir)/../move-if-change epoll.go.tmp epoll.go
+	$(STAMP) $@
+
 asn1/asn1.lo: $(go_asn1_files) big.gox bytes.gox fmt.gox io.gox os.gox \
 		reflect.gox strconv.gox strings.gox time.gox
 	$(BUILDPACKAGE)
-- 
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