[Qemu-devel] [PATCH v2] build: include sys/sysmacros.h for major() and minor()

[Christopher Covington <cov@codeaurora.org>]

The definition of the major() and minor() macros are moving within glibc to
<sys/sysmacros.h>. Include this header to avoid the following sorts of
build-stopping messages:

qga/commands-posix.c: In function ‘dev_major_minor’:
qga/commands-posix.c:656:13: error: In the GNU C Library, "major" is defined
 by <sys/sysmacros.h>. For historical compatibility, it is
 currently defined by <sys/types.h> as well, but we plan to
 remove this soon. To use "major", include <sys/sysmacros.h>
 directly. If you did not intend to use a system-defined macro
 "major", you should undefine it after including <sys/types.h>. [-Werror]
         *devmajor = major(st.st_rdev);
             ^~~~~~~~~~~~~~~~~~~~~~~~~~

qga/commands-posix.c:657:13: error: In the GNU C Library, "minor" is defined
 by <sys/sysmacros.h>. For historical compatibility, it is
 currently defined by <sys/types.h> as well, but we plan to
 remove this soon. To use "minor", include <sys/sysmacros.h>
 directly. If you did not intend to use a system-defined macro
 "minor", you should undefine it after including <sys/types.h>. [-Werror]
         *devminor = minor(st.st_rdev);
             ^~~~~~~~~~~~~~~~~~~~~~~~~~

The additional include allows the build to complete on Fedora 26 (Rawhide)
with glibc version 2.24.90.

Signed-off-by: Christopher Covington <cov@codeaurora.org>
---
 include/sysemu/os-posix.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/sysemu/os-posix.h b/include/sysemu/os-posix.h
index b0a6c0695b..772d58f7ed 100644
--- a/include/sysemu/os-posix.h
+++ b/include/sysemu/os-posix.h
@@ -28,6 +28,7 @@
 
 #include <sys/mman.h>
 #include <sys/socket.h>
+#include <sys/sysmacros.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
-- 
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