Libtool creates static library only - I need shared objects
automake, autotools, c++, libtool, linux
Solution
If libtool somehow believes it's on a platform that doesn't support shared libraries, it simply ignores you and builds static libraries instead. I see you're cross-compiling, perhaps libtool doesn't know how to build shared libraries for the target platform.
You'll want to check your `configure` output for a line that says something like
checking whether to build shared libraries...no
and then read `config.log` to find out why.
Problem
I have a couple of C++ classes and I want to compile them into a shared library using autotools and libtool. These are my configure.ac and Makefile.am files: configure.ac: ``` AC_PREREQ(2.67) AC_INIT(somelib.so, 1.0, someone@somewhere.com) AC_LANG(C++) AM_INIT_AUTOMAKE(somelib, 1.0) LT_INIT([disable-static]) AM_DISABLE_STATIC AM_PROG_LIBTOOL AC_LIBTOOL_DLOPEN AC_PROG_LIBTOOL AC_CONFIG_SRCDIR([Logger.cpp]) AC_CONFIG_HEADER([config.h]) # Checks for programs. AC_PROG_CXX AC_PROG_CC AC_SUBST(LIBTOOL_DEPS) AC_LTDL_DLLIB AC_PROG_RANLIB AC_SUBST(LIBTOOL_DEPS) AC_LTDL_DLLIB # Checks for libraries. # Checks for header files. AC_HEADER_STDC AC_CHECK_HEADERS([cstring unistd.h pthread.h]) # Checks for typedefs, structures, and compiler characteristics. AC_HEADER_STDBOOL AC_C_CONST AC_C_INLINE AC_TYPE_SIZE_T # Checks for library functions. AC_FUNC_MALLOC AC_FUNC_REALLOC AC_TYPE_SIGNAL AC_CHECK_FUNCS([mkdir strdup dup2]) AC_CHECK_LIB(pthread, pthread_create, [], [ echo "ERROR!: libpthread not found!"; exit -1], []) AC_CHECK_LIB(xml2, htmlReadMemory, [], [ echo "ERROR!: libxml2 not found!"; exit -1], []) AC_CONFIG_MACRO_DIR([m4]) AC_OUTPUT(Makefile) ``` Makefile.am: ``` AUTOMAKE_OPTIONS = foreign ACLOCAL_AMFLAGS = -I m4 CPPFLAGS = `xml2-config --cflags` -g -fPIC -Wall -O2 AM_LDFLAGS = `xml2-config --libs` -pthread -shared -L$(libdir) -L.libs -lboost_iostreams -lz -lbz2 -L/shared/hudson/arm/lib -I/shared/hudson/arm/include LIBVER=1:0:0 lib_LTLIBRARIES = somelib.la somelib_la_SOURCES = <sources go here> somelib_la_LDFLAGS = -version-info $(LIBVER) library_includedir=$(includedir)/os library_include_HEADERS = <headers go here> ``` Libtool only creates static libs, although I call configure --disable-static --enable-shared to explicitly instruct the script to create shared objects. What is wrong with my files? --- EDIT --- The link cmd from libtool: ``` /bin/bash ./libtool --tag=CXX --mode=link arm-cortex_a8-linux-gnueabi-g++ -g -O2 -version-info 1:0:0 -o somelib.la -rpath /usr/local/lib AutoMutex.lo IniParser.lo Logger.lo Mutex.lo ProcInfo.lo Timer.lo XmlDocContainer.lo XmlNode.lo XmlParser.lo XmlSchemaValidator.lo XmlTree.lo ByteArray.lo IXmlEngine.lo LoggerSetup.lo Process.lo Thread.lo Utils.lo XmlError.lo XmlObjectEngine.lo XmlSchemaEngine.lo XmlSimpleEngine.lo Unziper.lo MUTool.lo -lxml2 -lpthread -ldl -ldl libtool: link: arm-cortex_a8-linux-gnueabi-ar cru .libs/somelib.a AutoMutex.o IniParser.o Logger.o Mutex.o ProcInfo.o Timer.o XmlDocContainer.o XmlNode.o XmlParser.o XmlSchemaValidator.o XmlTree.o ByteArray.o IXmlEngine.o LoggerSetup.o Process.o Thread.o Utils.o XmlError.o XmlObjectEngine.o XmlSchemaEngine.o XmlSimpleEngine.o Unziper.o MUTool.o libtool: link: arm-cortex_a8-linux-gnueabi-ranlib .libs/somelib.a libtool: link: ( cd ".libs" && rm -f "somelib.la" && ln -s "../somelib.la" "somelib.la" ) make[1]: Leaving directory `/home/bg/workspace/git/somelib/src' ```