configure.ac: handle --disable-shared flag

Since LVM 2.02 it appears that compiling LVM on a platform which
lacks a shared library linker/loader will fail to produce any
binaries (dmsetup, lvm2, etc).

Adds support for the standard --disable-shared flag, and
use it to disable attempts at building shared libraries.

Modified-by: zkabelac

configure.ac

@@ -185,6 +185,14 @@ AC_ARG_ENABLE(static_link,
 	      STATIC_LINK=$enableval, STATIC_LINK="no")
 AC_MSG_RESULT([$STATIC_LINK])
 
+################################################################################
+dnl -- Disables shared linking
+AC_MSG_CHECKING([whether to use dynamic linking])
+AC_ARG_ENABLE(shared,
+	      AS_HELP_STRING([--disable-shared], [disable dynamic linking]),
+	      SHARED_LINK=$enableval, SHARED_LINK="yes")
+AC_MSG_RESULT([$SHARED_LINK])
+
 ################################################################################
 dnl -- Check if compiler/linker supports PIE and RELRO
 AC_TRY_CCFLAG([-pie], [HAVE_PIE], [], [])
@@ -1218,7 +1226,10 @@ AC_ARG_ENABLE(cmdlib,
 	      CMDLIB=$enableval, CMDLIB="no")
 AC_MSG_RESULT([$CMDLIB])
 AC_SUBST([LVM2CMD_LIB])
-AS_IF([test "$CMDLIB" = "yes"], [LVM2CMD_LIB="-llvm2cmd"], [LVM2CMD_LIB=])
+AS_IF([test "$CMDLIB" = "yes"],
+      [AS_IF([test "$SHARED_LINK" = "no"],
+	     [AC_MSG_ERROR([--enable-cmdlib requires dynamic linking.])])
+       LVM2CMD_LIB="-llvm2cmd"], [LVM2CMD_LIB=])
 
 ################################################################################
 dnl -- Enable D-Bus service
@@ -1892,6 +1903,7 @@ AC_SUBST(SBINDIR)
 AC_SUBST(SELINUX_LIBS)
 AC_SUBST(SELINUX_PC)
 AC_SUBST(SELINUX_STATIC_LIBS)
+AC_SUBST(SHARED_LINK)
 AC_SUBST(SILENT_RULES)
 AC_SUBST(SNAPSHOTS)
 AC_SUBST(STATICDIR)

libdm/Makefile.in

@@ -47,7 +47,9 @@ endif
 
 LIB_SHARED = $(interface)/libdevmapper.$(LIB_SUFFIX)
 LIB_VERSION = $(LIB_VERSION_DM)
+ifeq ("@SHARED_LINK@", "yes")
 TARGETS = libdevmapper.$(LIB_SUFFIX) libdevmapper.$(LIB_SUFFIX).$(LIB_VERSION) .symver_check
+endif
 
 CFLOW_LIST = $(SOURCES)
 CFLOW_LIST_TARGET = libdevmapper.cflow
@@ -103,7 +105,12 @@ install_dynamic: install_@interface@
 
 install_static: install_@interface@_static
 
+ifeq ("@SHARED_LINK@", "yes")
 install_ioctl: install_lib_shared
+endif
+ifeq ("@STATIC_LINK@", "yes")
+install_ioctl: install_ioctl_static
+endif
 
 install_pkgconfig: libdevmapper.pc
 	@echo "    [INSTALL] $<"

libdm/dm-tools/Makefile.in

@@ -19,13 +19,15 @@ top_builddir = @top_builddir@
 all: device-mapper
 
 SOURCES2 = dmsetup.c
-TARGETS_DM = dmsetup
 
 CFLOW_SOURCES = $(addprefix $(srcdir)/, $(SOURCES2))
 CFLOW_TARGET := $(TARGETS_DM)
 -include $(top_builddir)/libdm/libdevmapper.cflow
 
-install_device-mapper: install_dmsetup_dynamic
+ifeq ("@SHARED_LINK@", "yes")
+  TARGETS_DM += dmsetup
+  install_device-mapper: install_dmsetup_dynamic
+endif
 
 ifeq ("@STATIC_LINK@", "yes")
   TARGETS_DM += dmsetup.static
@@ -35,8 +37,11 @@ endif
 # dmfilemapd support
 ifeq ("@BUILD_DMFILEMAPD@", "yes")
   SOURCES2 += dmfilemapd.c
-  TARGETS_DM += dmfilemapd
+
-  install_dmfilemapd: install_dmfilemapd_dynamic
+  ifeq ("@SHARED_LINK@", "yes")
+     TARGETS_DM += dmfilemapd
+     install_dmfilemapd: install_dmfilemapd_dynamic
+  endif
 
   ifeq ("@STATIC_LINK@", "yes")
     TARGETS_DM += dmfilemapd.static

libdm/make.tmpl.in

@@ -318,7 +318,12 @@ SUBDIRS.cflow := $(SUBDIRS:=.cflow)
 SUBDIRS.clean := $(SUBDIRS:=.clean)
 SUBDIRS.distclean := $(SUBDIRS:=.distclean)
 
-TARGETS += $(LIB_SHARED) $(LIB_STATIC)
+ifeq ("@SHARED_LINK@", "yes")
+  TARGETS += $(LIB_SHARED)
+endif
+ifeq ("@STATIC_LINK@", "yes")
+  TARGETS += $(LIB_STATIC)
+endif
 
 all: $(SUBDIRS) $(TARGETS)
 

make.tmpl.in

@@ -373,7 +373,12 @@ SUBDIRS.cflow := $(SUBDIRS:=.cflow)
 SUBDIRS.clean := $(SUBDIRS:=.clean)
 SUBDIRS.distclean := $(SUBDIRS:=.distclean)
 
-TARGETS += $(LIB_SHARED) $(LIB_STATIC)
+ifeq ("@SHARED_LINK@", "yes")
+  TARGETS += $(LIB_SHARED)
+endif
+ifeq ("@STATIC_LINK@", "yes")
+  TARGETS += $(LIB_STATIC)
+endif
 
 INTERNAL_LIBS = \
 	$(top_builddir)/libdaemon/client/libdaemonclient.a \

tools/Makefile.in

@@ -100,10 +100,12 @@ CLEAN_TARGETS = liblvm2cmd.$(LIB_SUFFIX) $(TARGETS_DM) \
 	$(LDDEPS) .exported_symbols_generated cmds.h \
 	command-lines-input.h command-count.h man-generator.c
 
+ifeq ("@SHARED_LINK@", "yes")
 ifeq ("@CMDLIB@", "yes")
 	TARGETS += liblvm2cmd.$(LIB_SUFFIX).$(LIB_VERSION)
 	INSTALL_LVM_TARGETS += $(INSTALL_CMDLIB_TARGETS)
 endif
+endif
 
 EXPORTED_HEADER = $(srcdir)/lvm2cmd.h
 EXPORTED_FN_PREFIX = lvm2