Re: [PATCH v3] autoconf: only link binaries that need it to libtirpc

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On 01/13/2012 09:47 AM, Jeff Layton wrote:
> This patch is essentially the same as the previous version, but has
> been respun to fix up some merge conflicts with some of Chuck's
> recent changes.
> 
> When we first added tirpc support, we took a "big hammer" approach, and
> had it add libtirpc to $LIBS. That had the effect of making it so that
> that library was linked into every binary. That's unnecessary, and
> wasteful with memory.
> 
> Don't let AC_CHECK_LIB add -ltirpc to $LIBS. Instead, have the autoconf
> tests set $(LIBTIRPC) in the makefiles, and have the programs that
> need it explicitly include that library. In the event that we're not
> using libtirpc, then set $LIBTIRPC to a blank string.
> 
> This necessitates a change to the bindresvport_sa check too. Since that
> library is no longer included in $LIBS, we need to convert that check
> to use AC_CHECK_LIB instead of AC_CHECK_FUNCS.
> 
> This patch also fixes a subtle bug. If the library was usable, but the
> includes were not, the test would set $enable_tirpc to "no", but
> HAVE_LIBTIRPC would still be true. That configuration would likely
> fail to build.
> 
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Committed...

steved.

> ---
>  aclocal/ipv6.m4             |    4 +++-
>  aclocal/libtirpc.m4         |   15 +++++++++++++--
>  tools/rpcgen/Makefile.am    |    1 +
>  utils/gssd/Makefile.am      |    4 ++--
>  utils/mount/Makefile.am     |    3 ++-
>  utils/mountd/Makefile.am    |    2 +-
>  utils/nfsd/Makefile.am      |    2 +-
>  utils/showmount/Makefile.am |    3 ++-
>  utils/statd/Makefile.am     |    4 ++--
>  9 files changed, 27 insertions(+), 11 deletions(-)
> 
> diff --git a/aclocal/ipv6.m4 b/aclocal/ipv6.m4
> index 4e39fbe..75a8582 100644
> --- a/aclocal/ipv6.m4
> +++ b/aclocal/ipv6.m4
> @@ -10,9 +10,11 @@ AC_DEFUN([AC_IPV6], [
>      fi
>  
>      dnl IPv6-enabled networking functions required for IPv6
> -    AC_CHECK_FUNCS([getifaddrs getnameinfo bindresvport_sa], ,
> +    AC_CHECK_FUNCS([getifaddrs getnameinfo], ,
>                     [AC_MSG_ERROR([Missing library functions needed for IPv6.])])
>  
> +    AC_CHECK_LIB([tirpc], [bindresvport_sa], [:],
> +		 [AC_MSG_ERROR([Missing library functions needed for IPv6.])])
>    fi
>  
>  ])dnl
> diff --git a/aclocal/libtirpc.m4 b/aclocal/libtirpc.m4
> index 9f0fde0..19b8361 100644
> --- a/aclocal/libtirpc.m4
> +++ b/aclocal/libtirpc.m4
> @@ -13,8 +13,8 @@ AC_DEFUN([AC_LIBTIRPC], [
>  
>    if test "$enable_tirpc" != "no"; then
>  
> -    dnl look for the library; add to LIBS if found
> -    AC_CHECK_LIB([tirpc], [clnt_tli_create], ,
> +    dnl look for the library
> +    AC_CHECK_LIB([tirpc], [clnt_tli_create], [:],
>                   [if test "$enable_tirpc" = "yes"; then
>  			AC_MSG_ERROR([libtirpc not found.])
>  		  else
> @@ -37,4 +37,15 @@ AC_DEFUN([AC_LIBTIRPC], [
>  
>    fi
>  
> +  dnl now set $LIBTIRPC accordingly
> +  if test "$enable_tirpc" != "no"; then
> +    AC_DEFINE([HAVE_LIBTIRPC], 1,
> +              [Define to 1 if you have and wish to use libtirpc.])
> +    LIBTIRPC="-ltirpc"
> +  else
> +    LIBTIRPC=""
> +  fi
> +
> +  AC_SUBST(LIBTIRPC)
> +
>  ])dnl
> diff --git a/tools/rpcgen/Makefile.am b/tools/rpcgen/Makefile.am
> index 51a2bfa..8a9ec89 100644
> --- a/tools/rpcgen/Makefile.am
> +++ b/tools/rpcgen/Makefile.am
> @@ -12,6 +12,7 @@ rpcgen_SOURCES = rpc_clntout.c rpc_cout.c rpc_hout.c rpc_main.c \
>  rpcgen_CFLAGS=$(CFLAGS_FOR_BUILD)
>  rpcgen_CPPLAGS=$(CPPFLAGS_FOR_BUILD)
>  rpcgen_LDFLAGS=$(LDFLAGS_FOR_BUILD)
> +rpcgen_LDADD=$(LIBTIRPC)
>  
>  MAINTAINERCLEANFILES = Makefile.in
>  
> diff --git a/utils/gssd/Makefile.am b/utils/gssd/Makefile.am
> index 9136189..d29e132 100644
> --- a/utils/gssd/Makefile.am
> +++ b/utils/gssd/Makefile.am
> @@ -40,7 +40,7 @@ gssd_SOURCES = \
>  
>  gssd_LDADD =	../../support/nfs/libnfs.a \
>  		$(RPCSECGSS_LIBS) $(GSSGLUE_LIBS) $(KRBLIBS)
> -gssd_LDFLAGS = $(KRBLDFLAGS)
> +gssd_LDFLAGS = $(KRBLDFLAGS) $(LIBTIRPC)
>  
>  gssd_CFLAGS = $(AM_CFLAGS) $(CFLAGS) \
>  	      $(RPCSECGSS_CFLAGS) $(GSSGLUE_CFLAGS) $(KRBCFLAGS)
> @@ -59,7 +59,7 @@ svcgssd_SOURCES = \
>  svcgssd_LDADD = \
>  	../../support/nfs/libnfs.a \
>  	$(RPCSECGSS_LIBS) $(GSSGLUE_LIBS) $(LIBNFSIDMAP) \
> -	$(KRBLIBS)
> +	$(KRBLIBS) $(LIBTIRPC)
>  
>  svcgssd_LDFLAGS = $(KRBLDFLAGS)
>  
> diff --git a/utils/mount/Makefile.am b/utils/mount/Makefile.am
> index 7bc3e2b..7627854 100644
> --- a/utils/mount/Makefile.am
> +++ b/utils/mount/Makefile.am
> @@ -24,7 +24,8 @@ EXTRA_DIST += nfsmount.conf
>  endif
>  
>  mount_nfs_LDADD = ../../support/nfs/libnfs.a \
> -		  ../../support/export/libexport.a
> +		  ../../support/export/libexport.a \
> +		  $(LIBTIRPC)
>  
>  mount_nfs_SOURCES = $(mount_common)
>  
> diff --git a/utils/mountd/Makefile.am b/utils/mountd/Makefile.am
> index 5a2d1b6..7db968b 100644
> --- a/utils/mountd/Makefile.am
> +++ b/utils/mountd/Makefile.am
> @@ -12,7 +12,7 @@ mountd_SOURCES = mountd.c mount_dispatch.c auth.c rmtab.c cache.c \
>  mountd_LDADD = ../../support/export/libexport.a \
>  	       ../../support/nfs/libnfs.a \
>  	       ../../support/misc/libmisc.a \
> -	       $(LIBBSD) $(LIBWRAP) $(LIBNSL) $(LIBBLKID) $(LIBDL)
> +	       $(LIBBSD) $(LIBWRAP) $(LIBNSL) $(LIBBLKID) $(LIBDL) $(LIBTIRPC)
>  mountd_CPPFLAGS = $(AM_CPPFLAGS) $(CPPFLAGS) \
>  		  -I$(top_builddir)/support/include \
>  		  -I$(top_srcdir)/support/export
> diff --git a/utils/nfsd/Makefile.am b/utils/nfsd/Makefile.am
> index c4c6fb0..1536065 100644
> --- a/utils/nfsd/Makefile.am
> +++ b/utils/nfsd/Makefile.am
> @@ -8,7 +8,7 @@ KPREFIX		= @kprefix@
>  sbin_PROGRAMS	= nfsd
>  
>  nfsd_SOURCES = nfsd.c nfssvc.c
> -nfsd_LDADD = ../../support/nfs/libnfs.a
> +nfsd_LDADD = ../../support/nfs/libnfs.a $(LIBTIRPC)
>  
>  MAINTAINERCLEANFILES = Makefile.in
>  
> diff --git a/utils/showmount/Makefile.am b/utils/showmount/Makefile.am
> index 077b2c7..4ba5ead 100644
> --- a/utils/showmount/Makefile.am
> +++ b/utils/showmount/Makefile.am
> @@ -7,7 +7,8 @@ sbin_PROGRAMS	= showmount
>  showmount_SOURCES = showmount.c
>  showmount_LDADD = ../../support/export/libexport.a \
>  		  ../../support/nfs/libnfs.a \
> -	  	  ../../support/misc/libmisc.a
> +		  ../../support/misc/libmisc.a \
> +		  $(LIBTIRPC)
>  showmount_CPPFLAGS = $(AM_CPPFLAGS) $(CPPFLAGS) \
>  		   -I$(top_builddir)/support/export
>  
> diff --git a/utils/statd/Makefile.am b/utils/statd/Makefile.am
> index 1744791..dc2bfc4 100644
> --- a/utils/statd/Makefile.am
> +++ b/utils/statd/Makefile.am
> @@ -15,10 +15,10 @@ BUILT_SOURCES = $(GENFILES)
>  statd_LDADD = ../../support/nsm/libnsm.a \
>  	      ../../support/nfs/libnfs.a \
>  	      ../../support/misc/libmisc.a \
> -	      $(LIBWRAP) $(LIBNSL) $(LIBCAP)
> +	      $(LIBWRAP) $(LIBNSL) $(LIBCAP) $(LIBTIRPC)
>  sm_notify_LDADD = ../../support/nsm/libnsm.a \
>  		  ../../support/nfs/libnfs.a \
> -		  $(LIBNSL) $(LIBCAP)
> +		  $(LIBNSL) $(LIBCAP) $(LIBTIRPC)
>  
>  EXTRA_DIST = sim_sm_inter.x $(man8_MANS) COPYRIGHT simulate.c
>  
> -- 1.7.1
--
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