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virsh: workaround readline prototypes warnings

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When building with clang 4.0.0, virsh build fails like this:

gmake[3]: Entering directory '/usr/home/novel/code/libvirt/tools'
  CC       virsh-virsh.o
In file included from virsh.c:45:
In file included from /usr/local/include/readline/readline.h:31:
/usr/local/include/readline/rltypedefs.h:35:22: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
typedef int Function () __attribute__ ((deprecated));
                     ^
                      void
/usr/local/include/readline/rltypedefs.h:36:24: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
typedef void VFunction () __attribute__ ((deprecated));
                       ^
                        void
/usr/local/include/readline/rltypedefs.h:37:26: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
typedef char *CPFunction () __attribute__ ((deprecated));
                         ^
                          void
/usr/local/include/readline/rltypedefs.h:38:28: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
typedef char **CPPFunction () __attribute__ ((deprecated));
                           ^
                            void
In file included from virsh.c:45:
/usr/local/include/readline/readline.h:385:23: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
extern int rl_message ();
                      ^
                       void
5 errors generated.
gmake[3]: *** [Makefile:2823: virsh-virsh.o] Error 1

Fix that by adding -D_FUNCTION_DEF to READLINE_CFLAGS to fix *Function
related warnings and add a check for stdarg.h so we have HAVE_STDARG_H
defined that's needed by the readline headers to use proper rl_message
declaration.

Bug report on the readline mailing list:

 http://lists.gnu.org/archive/html/bug-readline/2017-05/msg00004.html
This commit is contained in:
Roman Bogorodskiy 2017-05-26 21:43:42 +04:00
parent 5f44d7e357
commit 9ea3424a17
3 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
configure.ac
View File

@ -328,7 +328,7 @@ dnl Availability of various common headers (non-fatal if missing).
AC_CHECK_HEADERS([pwd.h regex.h sys/un.h \
sys/poll.h syslog.h mntent.h net/ethernet.h linux/magic.h \
sys/un.h sys/syscall.h sys/sysctl.h netinet/tcp.h ifaddrs.h \
libtasn1.h sys/ucred.h sys/mount.h])
libtasn1.h sys/ucred.h sys/mount.h stdarg.h])
dnl Check whether endian provides handy macros.
AC_CHECK_DECLS([htole64], [], [], [[#include <endian.h>]])
AC_CHECK_FUNCS([stat stat64 __xstat __xstat64 lstat lstat64 __lxstat __lxstat64])

4
m4/virt-readline.m4
View File

@ -45,7 +45,9 @@ AC_DEFUN([LIBVIRT_CHECK_READLINE],[
# function, to ensure we aren't being confused by caching.
LIBS=$lv_saved_libs
AC_CHECK_LIB([readline], [rl_initialize],
[], [READLINE_LIBS="$READLINE_LIBS $extra_LIBS"])
[READLINE_CFLAGS="-D_FUNCTION_DEF $READLINE_CFLAGS"
AC_SUBST(READLINE_CFLAGS)],
[READLINE_LIBS="$READLINE_LIBS $extra_LIBS"])
LIBS=$lv_saved_libs
])

3
tools/Makefile.am
View File

@ -244,7 +244,8 @@ virsh_CFLAGS = \
$(WARN_CFLAGS) \
$(PIE_CFLAGS) \
$(COVERAGE_CFLAGS) \
$(LIBXML_CFLAGS)
$(LIBXML_CFLAGS) \
$(READLINE_CFLAGS)
virt_admin_SOURCES = \
virt-admin.c virt-admin.h \