merge upstream 3.4.0

git-svn-id: svn://svn.debian.org/svn/pkg-samba/trunk/samba@2936 fc4039ab-9d04-0410-8cac-899223bdd6b0

1 files changed, 187 insertions, 0 deletions

diff --git a/source4/build/m4/check_ld.m4 b/source4/build/m4/check_ld.m4
new file mode 100644
index 0000000000..48d6b333ef
--- /dev/null
+++ b/source4/build/m4/check_ld.m4
@@ -0,0 +1,187 @@
+dnl SMB Build Environment LD Checks
+dnl -------------------------------------------------------
+dnl  Copyright (C) Stefan (metze) Metzmacher 2004
+dnl  Copyright (C) Jelmer Vernooij 2006
+dnl  Released under the GNU GPL
+dnl -------------------------------------------------------
+dnl
+
+AC_PATH_PROG(PROG_LD,ld)
+LD=${PROG_LD}
+AC_PROG_LD_GNU
+LD=""
+
+AC_SUBST(BLDSHARED)
+AC_SUBST(LD)
+AC_SUBST(SYS_LDFLAGS)
+AC_SUBST(LDFLAGS)
+
+# Assume non-shared by default and override below
+# these are the defaults, good for lots of systems
+BLDSHARED="false"
+LD="${CC}"
+PICFLAG=""
+
+# allow for --with-hostld=gcc
+AC_ARG_WITH(hostld,[  --with-hostld=linker    choose host linker],
+[HOSTLD=$withval],
+[HOSTLD=$HOSTCC])
+
+AC_MSG_CHECKING([whether to try to build shared libraries on $host_os])
+
+# and these are for particular systems
+case "$host_os" in
+	*linux*)
+		BLDSHARED="true"
+		SYS_LDFLAGS="-Wl,--export-dynamic"
+		;;
+	*solaris*)
+		BLDSHARED="true"
+		if test "${GCC}" = "yes"; then
+			if test "${ac_cv_prog_gnu_ld}" = "yes"; then
+				SYS_LDFLAGS="-Wl,-E"
+			fi
+		fi
+		;;
+	*sunos*)
+		BLDSHARED="true"
+		;;
+	*netbsd* | *freebsd* | *dragonfly* )  
+		BLDSHARED="true"
+		SYS_LDFLAGS="-Wl,--export-dynamic"
+		;;
+	*openbsd*)
+		BLDSHARED="true"
+		SYS_LDFLAGS="-Wl,-Bdynamic"
+		;;
+	*irix*)
+		BLDSHARED="true"
+		;;
+	*aix*)
+		BLDSHARED="true"
+		SYS_LDFLAGS="-Wl,-brtl,-bexpall,-bbigtoc"
+		;;
+	*hpux*)
+		# Use special PIC flags for the native HP-UX compiler.
+		BLDSHARED="true" # I hope this is correct
+		if test "$host_cpu" = "ia64"; then
+			SYS_LDFLAGS="-Wl,-E,+b/usr/local/lib/hpux32:/usr/lib/hpux32"
+		else
+			SYS_LDFLAGS="-Wl,-E,+b/usr/local/lib:/usr/lib"
+		fi
+		;;
+	*osf*)
+		BLDSHARED="true"
+		;;
+	*unixware*)
+		BLDSHARED="true"
+		;;
+	*darwin*)
+		BLDSHARED="true"
+		;;
+esac
+
+AC_MSG_RESULT($BLDSHARED)
+
+AC_MSG_CHECKING([LD])
+AC_MSG_RESULT([$LD])
+AC_MSG_CHECKING([LDFLAGS])
+AC_MSG_RESULT([$LDFLAGS])
+AC_MSG_CHECKING([SYS_LDFLAGS])
+AC_MSG_RESULT([$SYS_LDFLAGS])
+
+AC_SUBST(HOSTLD)
+
+AC_LIBREPLACE_STLD
+AC_LIBREPLACE_STLD_FLAGS
+
+AC_MSG_CHECKING([STLD])
+AC_MSG_RESULT([$STLD])
+AC_MSG_CHECKING([STLD_FLAGS])
+AC_MSG_RESULT([$STLD_FLAGS])
+
+AC_LD_PICFLAG
+AC_LD_EXPORT_DYNAMIC
+AC_LD_SHLIBEXT
+AC_LD_SONAMEFLAG
+AC_LIBREPLACE_SHLD
+AC_LIBREPLACE_SHLD_FLAGS
+AC_LIBREPLACE_MDLD
+AC_LIBREPLACE_MDLD_FLAGS
+AC_LIBREPLACE_RUNTIME_LIB_PATH_VAR
+
+#######################################################
+# test whether building a shared library actually works
+if test $BLDSHARED = true; then
+
+	AC_MSG_CHECKING([SHLD])
+	AC_MSG_RESULT([$SHLD])
+	AC_MSG_CHECKING([SHLD_FLAGS])
+	AC_MSG_RESULT([$SHLD_FLAGS])
+
+	AC_MSG_CHECKING([MDLD])
+	AC_MSG_RESULT([$MDLD])
+	AC_MSG_CHECKING([MDLD_FLAGS])
+	AC_MSG_RESULT([$MDLD_FLAGS])
+
+	AC_MSG_CHECKING([SHLIBEXT])
+	AC_MSG_RESULT([$SHLIBEXT])
+	AC_MSG_CHECKING([SONAMEFLAG])
+	AC_MSG_RESULT([$SONAMEFLAG])
+
+	AC_MSG_CHECKING([PICFLAG])
+	AC_MSG_RESULT([$PICFLAG])
+
+	AC_CACHE_CHECK([whether building shared libraries actually works], 
+	               [ac_cv_shlib_works],[
+			ac_cv_shlib_works=no
+			# try building a trivial shared library
+			# TODO: also test SONAMEFLAG
+			${CC} ${CFLAGS} ${PICFLAG} -c ${srcdir-.}/../tests/shlib.c -o shlib.o &&
+				${SHLD} ${SHLD_FLAGS} -o shlib.${SHLIBEXT} shlib.o && 
+				ac_cv_shlib_works=yes
+			rm -f shlib.${SHLIBEXT} shlib.o
+	])
+	AC_CACHE_CHECK([whether building shared modules actually works], 
+	               [ac_cv_shmod_works],[
+			ac_cv_shmod_works=no
+			# try building a trivial shared library
+			${CC} ${CFLAGS} ${PICFLAG} -c ${srcdir-.}/../tests/shlib.c -o shlib.o &&
+				${MDLD} ${MDLD_FLAGS} -o shlib.${SHLIBEXT} shlib.o && 
+				ac_cv_shmod_works=yes
+			rm -f shlib.${SHLIBEXT} shlib.o
+	])
+	if test $ac_cv_shlib_works = no; then
+		AC_MSG_ERROR(unable to build shared libraries)
+	fi
+	if test $ac_cv_shmod_works = no; then
+		AC_MSG_ERROR(unable to build shared modules)
+	fi
+fi
+
+AC_DEFINE_UNQUOTED(SHLIBEXT, "$SHLIBEXT", [Shared library extension])
+
+AC_MSG_CHECKING([if we can link using the selected flags])
+AC_TRY_RUN([#include "${srcdir-.}/../tests/trivial.c"],
+	    AC_MSG_RESULT(yes),
+	    AC_MSG_ERROR([we cannot link with the selected cc and ld flags. Aborting configure]),
+	    AC_MSG_WARN([cannot run when cross-compiling]))
+
+
+USESHARED=false
+AC_SUBST(USESHARED)
+
+AC_ARG_ENABLE(dso,
+[  --enable-dso 	          Enable using shared libraries internally (experimental)],
+[],[enable_dso=no])
+
+if test x"$enable_dso" = x"yes" -a x"$BLDSHARED" != x"true"; then
+	AC_MSG_ERROR([--enable-dso: no support for shared libraries])
+fi
+
+if test x"$enable_dso" != x"no"; then
+	USESHARED=$BLDSHARED
+fi
+
+AC_MSG_CHECKING([if binaries will use shared libraries])
+AC_MSG_RESULT([$USESHARED])