dnl === configure.ac --------------------------------------------------------=== dnl The LLVM Compiler Infrastructure dnl dnl This file is distributed under the University of Illinois Open Source dnl License. See LICENSE.TXT for details. dnl dnl===-----------------------------------------------------------------------=== dnl This is the LLVM configuration script. It is processed by the autoconf dnl program to produce a script named configure. This script contains the dnl configuration checks that LLVM needs in order to support multiple platforms. dnl This file is composed of 10 sections per the recommended organization of dnl autoconf input defined in the autoconf documentation. As this file evolves, dnl please keep the various types of checks within their sections. The sections dnl are as follows: dnl dnl SECTION 1: Initialization & Setup dnl SECTION 2: Architecture, target, and host checks dnl SECTION 3: Command line arguments for the configure script. dnl SECTION 4: Check for programs we need and that they are the right version dnl SECTION 5: Check for libraries dnl SECTION 6: Check for header files dnl SECTION 7: Check for types and structures dnl SECTION 8: Check for specific functions needed dnl SECTION 9: Additional checks, variables, etc. dnl SECTION 10: Specify the output files and generate it dnl dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 1: Initialization & Setup dnl=== dnl===-----------------------------------------------------------------------=== dnl Initialize autoconf and define the package name, version number and dnl email address for reporting bugs. AC_INIT([[llvm]],[[2.6svn]],[llvmbugs@cs.uiuc.edu]) dnl Provide a copyright substitution and ensure the copyright notice is included dnl in the output of --version option of the generated configure script. AC_SUBST(LLVM_COPYRIGHT,["Copyright (c) 2003-2008 University of Illinois at Urbana-Champaign."]) AC_COPYRIGHT([Copyright (c) 2003-2008 University of Illinois at Urbana-Champaign.]) dnl Indicate that we require autoconf 2.59 or later. Ths is needed because we dnl use some autoconf macros only available in 2.59. AC_PREREQ(2.59) dnl Verify that the source directory is valid. This makes sure that we are dnl configuring LLVM and not some other package (it validates --srcdir argument) AC_CONFIG_SRCDIR([lib/VMCore/Module.cpp]) dnl Place all of the extra autoconf files into the config subdirectory. Tell dnl various tools where the m4 autoconf macros are. AC_CONFIG_AUX_DIR([autoconf]) dnl Quit if the source directory has already been configured. dnl NOTE: This relies upon undocumented autoconf behavior. if test ${srcdir} != "." ; then if test -f ${srcdir}/include/llvm/Config/config.h ; then AC_MSG_ERROR([Already configured in ${srcdir}]) fi fi dnl Configure all of the projects present in our source tree. While we could dnl just AC_CONFIG_SUBDIRS on the set of directories in projects that have a dnl configure script, that usage of the AC_CONFIG_SUBDIRS macro is deprecated. dnl Instead we match on the known projects. for i in `ls ${srcdir}/projects` do if test -d ${srcdir}/projects/${i} ; then case ${i} in CVS) ;; sample) AC_CONFIG_SUBDIRS([projects/sample]) ;; privbracket) AC_CONFIG_SUBDIRS([projects/privbracket]) ;; llvm-stacker) AC_CONFIG_SUBDIRS([projects/llvm-stacker]) ;; # llvm-test is the old name of the test-suite, kept here for backwards # compatibility llvm-test) AC_CONFIG_SUBDIRS([projects/llvm-test]) ;; test-suite) AC_CONFIG_SUBDIRS([projects/test-suite]) ;; llvm-reopt) AC_CONFIG_SUBDIRS([projects/llvm-reopt]);; llvm-gcc) AC_CONFIG_SUBDIRS([projects/llvm-gcc]) ;; llvm-java) AC_CONFIG_SUBDIRS([projects/llvm-java]) ;; llvm-tv) AC_CONFIG_SUBDIRS([projects/llvm-tv]) ;; llvm-poolalloc) AC_CONFIG_SUBDIRS([projects/llvm-poolalloc]) ;; poolalloc) AC_CONFIG_SUBDIRS([projects/poolalloc]) ;; llvm-kernel) AC_CONFIG_SUBDIRS([projects/llvm-kernel]) ;; *) AC_MSG_WARN([Unknown project (${i}) won't be configured automatically]) ;; esac fi done dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 2: Architecture, target, and host checks dnl=== dnl===-----------------------------------------------------------------------=== dnl Check the target for which we're compiling and the host that will do the dnl compilations. This will tell us which LLVM compiler will be used for dnl compiling SSA into object code. This needs to be done early because dnl following tests depend on it. AC_CANONICAL_TARGET dnl Determine the platform type and cache its value. This helps us configure dnl the System library to the correct build platform. AC_CACHE_CHECK([type of operating system we're going to host on], [llvm_cv_os_type], [case $host in *-*-aix*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="AIX" llvm_cv_platform_type="Unix" ;; *-*-irix*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="IRIX" llvm_cv_platform_type="Unix" ;; *-*-cygwin*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="Cygwin" llvm_cv_platform_type="Unix" ;; *-*-darwin*) llvm_cv_link_all_option="-Wl,-all_load" llvm_cv_no_link_all_option="-Wl,-noall_load" llvm_cv_os_type="Darwin" llvm_cv_platform_type="Unix" ;; *-*-freebsd*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="FreeBSD" llvm_cv_platform_type="Unix" ;; *-*-openbsd*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="OpenBSD" llvm_cv_platform_type="Unix" ;; *-*-netbsd*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="NetBSD" llvm_cv_platform_type="Unix" ;; *-*-dragonfly*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="DragonFly" llvm_cv_platform_type="Unix" ;; *-*-hpux*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="HP-UX" llvm_cv_platform_type="Unix" ;; *-*-interix*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="Interix" llvm_cv_platform_type="Unix" ;; *-*-linux*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="Linux" llvm_cv_platform_type="Unix" ;; *-*-solaris*) llvm_cv_link_all_option="-Wl,-z,allextract" llvm_cv_no_link_all_option="-Wl,-z,defaultextract" llvm_cv_os_type="SunOS" llvm_cv_platform_type="Unix" ;; *-*-win32*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="Win32" llvm_cv_platform_type="Win32" ;; *-*-mingw*) llvm_cv_link_all_option="-Wl,--whole-archive" llvm_cv_no_link_all_option="-Wl,--no-whole-archive" llvm_cv_os_type="MingW" llvm_cv_platform_type="Win32" ;; *) llvm_cv_link_all_option="" llvm_cv_no_link_all_option="" llvm_cv_os_type="Unknown" llvm_cv_platform_type="Unknown" ;; esac]) dnl Make sure we aren't attempting to configure for an unknown system if test "$llvm_cv_os_type" = "Unknown" ; then AC_MSG_ERROR([Operating system is unknown, configure can't continue]) fi dnl Set the "OS" Makefile variable based on the platform type so the dnl makefile can configure itself to specific build hosts AC_SUBST(OS,$llvm_cv_os_type) dnl Set the LINKALL and NOLINKALL Makefile variables based on the platform AC_SUBST(LINKALL,$llvm_cv_link_all_option) AC_SUBST(NOLINKALL,$llvm_cv_no_link_all_option) dnl Set the "LLVM_ON_*" variables based on llvm_cvs_platform_type dnl This is used by lib/System to determine the basic kind of implementation dnl to use. case $llvm_cv_platform_type in Unix) AC_DEFINE([LLVM_ON_UNIX],[1],[Define if this is Unixish platform]) AC_SUBST(LLVM_ON_UNIX,[1]) AC_SUBST(LLVM_ON_WIN32,[0]) ;; Win32) AC_DEFINE([LLVM_ON_WIN32],[1],[Define if this is Win32ish platform]) AC_SUBST(LLVM_ON_UNIX,[0]) AC_SUBST(LLVM_ON_WIN32,[1]) ;; esac dnl Determine what our target architecture is and configure accordingly. dnl This will allow Makefiles to make a distinction between the hardware and dnl the OS. AC_CACHE_CHECK([target architecture],[llvm_cv_target_arch], [case $target in i?86-*) llvm_cv_target_arch="x86" ;; amd64-* | x86_64-*) llvm_cv_target_arch="x86_64" ;; sparc*-*) llvm_cv_target_arch="Sparc" ;; powerpc*-*) llvm_cv_target_arch="PowerPC" ;; alpha*-*) llvm_cv_target_arch="Alpha" ;; ia64-*) llvm_cv_target_arch="IA64" ;; arm-*) llvm_cv_target_arch="ARM" ;; mips-*) llvm_cv_target_arch="Mips" ;; pic16-*) llvm_cv_target_arch="PIC16" ;; xcore-*) llvm_cv_target_arch="XCore" ;; *) llvm_cv_target_arch="Unknown" ;; esac]) if test "$llvm_cv_target_arch" = "Unknown" ; then AC_MSG_WARN([Configuring LLVM for an unknown target archicture]) fi dnl Define a substitution, ARCH, for the target architecture AC_SUBST(ARCH,$llvm_cv_target_arch) dnl Check for the endianness of the target AC_C_BIGENDIAN(AC_SUBST([ENDIAN],[big]),AC_SUBST([ENDIAN],[little])) dnl Check for build platform executable suffix if we're crosscompiling if test "$cross_compiling" = yes; then AC_SUBST(LLVM_CROSS_COMPILING, [1]) AC_BUILD_EXEEXT ac_build_prefix=${build_alias}- AC_CHECK_PROG(BUILD_CXX, ${ac_build_prefix}g++, ${ac_build_prefix}g++) if test -z "$BUILD_CXX"; then AC_CHECK_PROG(BUILD_CXX, g++, g++) if test -z "$BUILD_CXX"; then AC_CHECK_PROG(BUILD_CXX, c++, c++, , , /usr/ucb/c++) fi fi else AC_SUBST(LLVM_CROSS_COMPILING, [0]) fi dnl Check to see if there's a "CVS" (or .svn) directory indicating that this dnl build is being done from a checkout. This sets up several defaults for the dnl command line switches. When we build with a CVS directory, we get a dnl debug with assertions turned on. Without, we assume a source release and we dnl get an optimized build without assertions. See --enable-optimized and dnl --enable-assertions below if test -d "CVS" -o -d "${srcdir}/CVS" -o -d ".svn" -o -d "${srcdir}/.svn"; then cvsbuild="yes" optimize="no" AC_SUBST(CVSBUILD,[[CVSBUILD=1]]) else cvsbuild="no" optimize="yes" fi dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 3: Command line arguments for the configure script. dnl=== dnl===-----------------------------------------------------------------------=== dnl --enable-optimized : check whether they want to do an optimized build: AC_ARG_ENABLE(optimized, AS_HELP_STRING( [--enable-optimized,Compile with optimizations enabled (default is NO)]),,enableval=$optimize) if test ${enableval} = "no" ; then AC_SUBST(ENABLE_OPTIMIZED,[[]]) else AC_SUBST(ENABLE_OPTIMIZED,[[ENABLE_OPTIMIZED=1]]) fi dnl --enable-assertions : check whether they want to turn on assertions or not: AC_ARG_ENABLE(assertions,AS_HELP_STRING( [--enable-assertions,Compile with assertion checks enabled (default is YES)]),, enableval="yes") if test ${enableval} = "yes" ; then AC_SUBST(DISABLE_ASSERTIONS,[[]]) else AC_SUBST(DISABLE_ASSERTIONS,[[DISABLE_ASSERTIONS=1]]) fi dnl --enable-expensive-checks : check whether they want to turn on expensive debug checks: AC_ARG_ENABLE(expensive-checks,AS_HELP_STRING( [--enable-expensive-checks,Compile with expensive debug checks enabled (default is NO)]),, enableval="no") if test ${enableval} = "yes" ; then AC_SUBST(ENABLE_EXPENSIVE_CHECKS,[[ENABLE_EXPENSIVE_CHECKS=1]]) AC_SUBST(EXPENSIVE_CHECKS,[[yes]]) else AC_SUBST(ENABLE_EXPENSIVE_CHECKS,[[]]) AC_SUBST(EXPENSIVE_CHECKS,[[no]]) fi dnl --enable-debug-runtime : should runtime libraries have debug symbols? AC_ARG_ENABLE(debug-runtime, AS_HELP_STRING([--enable-debug-runtime,Build runtime libs with debug symbols (default is NO)]),,enableval=no) if test ${enableval} = "no" ; then AC_SUBST(DEBUG_RUNTIME,[[]]) else AC_SUBST(DEBUG_RUNTIME,[[DEBUG_RUNTIME=1]]) fi dnl --enable-jit: check whether they want to enable the jit AC_ARG_ENABLE(jit, AS_HELP_STRING(--enable-jit, [Enable Just In Time Compiling (default is YES)]),, enableval=default) if test ${enableval} = "no" then AC_SUBST(JIT,[[]]) else case "$llvm_cv_target_arch" in x86) AC_SUBST(TARGET_HAS_JIT,1) ;; Sparc) AC_SUBST(TARGET_HAS_JIT,0) ;; PowerPC) AC_SUBST(TARGET_HAS_JIT,1) ;; x86_64) AC_SUBST(TARGET_HAS_JIT,1) ;; Alpha) AC_SUBST(TARGET_HAS_JIT,1) ;; IA64) AC_SUBST(TARGET_HAS_JIT,0) ;; ARM) AC_SUBST(TARGET_HAS_JIT,0) ;; Mips) AC_SUBST(TARGET_HAS_JIT,0) ;; PIC16) AC_SUBST(TARGET_HAS_JIT,0) ;; XCore) AC_SUBST(TARGET_HAS_JIT,0) ;; *) AC_SUBST(TARGET_HAS_JIT,0) ;; esac fi dnl Allow enablement of doxygen generated documentation AC_ARG_ENABLE(doxygen, AS_HELP_STRING([--enable-doxygen], [Build doxygen documentation (default is NO)]),, enableval=default) case "$enableval" in yes) AC_SUBST(ENABLE_DOXYGEN,[1]) ;; no) AC_SUBST(ENABLE_DOXYGEN,[0]) ;; default) AC_SUBST(ENABLE_DOXYGEN,[0]) ;; *) AC_MSG_ERROR([Invalid setting for --enable-doxygen. Use "yes" or "no"]) ;; esac dnl Allow disablement of threads AC_ARG_ENABLE(threads, AS_HELP_STRING([--enable-threads], [Use threads if available (default is YES)]),, enableval=default) case "$enableval" in yes) AC_SUBST(ENABLE_THREADS,[1]) ;; no) AC_SUBST(ENABLE_THREADS,[0]) ;; default) AC_SUBST(ENABLE_THREADS,[1]) ;; *) AC_MSG_ERROR([Invalid setting for --enable-threads. Use "yes" or "no"]) ;; esac AC_DEFINE_UNQUOTED([ENABLE_THREADS],$ENABLE_THREADS,[Define if threads enabled]) dnl Allow building without position independent code AC_ARG_ENABLE(pic, AS_HELP_STRING([--enable-pic], [Build LLVM with Position Independent Code (default is YES)]),, enableval=default) case "$enableval" in yes) AC_SUBST(ENABLE_PIC,[1]) ;; no) AC_SUBST(ENABLE_PIC,[0]) ;; default) AC_SUBST(ENABLE_PIC,[1]) ;; *) AC_MSG_ERROR([Invalid setting for --enable-pic. Use "yes" or "no"]) ;; esac AC_DEFINE_UNQUOTED([ENABLE_PIC],$ENABLE_PIC, [Define if position independent code is enabled]) dnl Allow specific targets to be specified for building (or not) TARGETS_TO_BUILD="" AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets], [Build specific host targets: all,host-only,{target-name} (default=all)]),, enableval=all) case "$enableval" in all) TARGETS_TO_BUILD="X86 Sparc PowerPC Alpha IA64 ARM Mips CellSPU PIC16 XCore CBackend MSIL CppBackend" ;; host-only) case "$llvm_cv_target_arch" in x86) TARGETS_TO_BUILD="X86" ;; x86_64) TARGETS_TO_BUILD="X86" ;; Sparc) TARGETS_TO_BUILD="Sparc" ;; PowerPC) TARGETS_TO_BUILD="PowerPC" ;; Alpha) TARGETS_TO_BUILD="Alpha" ;; IA64) TARGETS_TO_BUILD="IA64" ;; ARM) TARGETS_TO_BUILD="ARM" ;; Mips) TARGETS_TO_BUILD="Mips" ;; CellSPU|SPU) TARGETS_TO_BUILD="CellSPU" ;; PIC16) TARGETS_TO_BUILD="PIC16" ;; XCore) TARGETS_TO_BUILD="XCore" ;; *) AC_MSG_ERROR([Can not set target to build]) ;; esac ;; *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do case "$a_target" in x86) TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;; x86_64) TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;; sparc) TARGETS_TO_BUILD="Sparc $TARGETS_TO_BUILD" ;; powerpc) TARGETS_TO_BUILD="PowerPC $TARGETS_TO_BUILD" ;; alpha) TARGETS_TO_BUILD="Alpha $TARGETS_TO_BUILD" ;; ia64) TARGETS_TO_BUILD="IA64 $TARGETS_TO_BUILD" ;; arm) TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;; mips) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;; spu) TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;; pic16) TARGETS_TO_BUILD="PIC16 $TARGETS_TO_BUILD" ;; xcore) TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;; cbe) TARGETS_TO_BUILD="CBackend $TARGETS_TO_BUILD" ;; msil) TARGETS_TO_BUILD="MSIL $TARGETS_TO_BUILD" ;; cpp) TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;; *) AC_MSG_ERROR([Unrecognized target $a_target]) ;; esac done ;; esac AC_SUBST(TARGETS_TO_BUILD,$TARGETS_TO_BUILD) dnl Prevent the CBackend from using printf("%a") for floating point so older dnl C compilers that cannot deal with the 0x0p+0 hex floating point format dnl can still compile the CBE's output AC_ARG_ENABLE([cbe-printf-a],AS_HELP_STRING([--enable-cbe-printf-a], [Enable C Backend output with hex floating point via %a (default is YES)]),, enableval=default) case "$enableval" in yes) AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;; no) AC_SUBST(ENABLE_CBE_PRINTF_A,[0]) ;; default) AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;; *) AC_MSG_ERROR([Invalid setting for --enable-cbe-printf-a. Use "yes" or "no"]) ;; esac AC_DEFINE_UNQUOTED([ENABLE_CBE_PRINTF_A],$ENABLE_CBE_PRINTF_A, [Define if CBE is enabled for printf %a output]) dnl Allow a specific llvm-gcc/llvm-g++ pair to be used with this LLVM config. AC_ARG_WITH(llvmgccdir, AS_HELP_STRING([--with-llvmgccdir], [Specify location of llvm-gcc install dir (default searches PATH)]),, withval=default) case "$withval" in default) WITH_LLVMGCCDIR=default ;; /* | [[A-Za-z]]:[[\\/]]*) WITH_LLVMGCCDIR=$withval ;; *) AC_MSG_ERROR([Invalid path for --with-llvmgccdir. Provide full path]) ;; esac dnl Allow a specific llvm-gcc compiler to be used with this LLVM config. AC_ARG_WITH(llvmgcc, AS_HELP_STRING([--with-llvmgcc], [Specify location of llvm-gcc driver (default searches PATH)]), LLVMGCC=$with_llvmgcc WITH_LLVMGCCDIR="",) dnl Allow a specific llvm-g++ compiler to be used with this LLVM config. AC_ARG_WITH(llvmgxx, AS_HELP_STRING([--with-llvmgxx], [Specify location of llvm-g++ driver (default searches PATH)]), LLVMGXX=$with_llvmgxx WITH_LLVMGCCDIR="",) if test -n "$LLVMGCC" && test -z "$LLVMGXX"; then AC_MSG_ERROR([Invalid llvm-g++. Use --with-llvmgxx when --with-llvmgcc is used]); fi if test -n "$LLVMGXX" && test -z "$LLVMGCC"; then AC_MSG_ERROR([Invalid llvm-gcc. Use --with-llvmgcc when --with-llvmgxx is used]); fi dnl Specify extra build options AC_ARG_WITH(extra-options, AS_HELP_STRING([--with-extra-options], [Specify addtional options to compile LLVM with]),, withval=default) case "$withval" in default) EXTRA_OPTIONS= ;; *) EXTRA_OPTIONS=$withval ;; esac AC_SUBST(EXTRA_OPTIONS,$EXTRA_OPTIONS) dnl Allow specific bindings to be specified for building (or not) AC_ARG_ENABLE([bindings],AS_HELP_STRING([--enable-bindings], [Build specific language bindings: all,auto,none,{binding-name} (default=auto)]),, enableval=default) BINDINGS_TO_BUILD="" case "$enableval" in yes | default | auto) BINDINGS_TO_BUILD="auto" ;; all ) BINDINGS_TO_BUILD="ocaml" ;; none | no) BINDINGS_TO_BUILD="" ;; *)for a_binding in `echo $enableval|sed -e 's/,/ /g' ` ; do case "$a_binding" in ocaml) BINDINGS_TO_BUILD="ocaml $BINDINGS_TO_BUILD" ;; *) AC_MSG_ERROR([Unrecognized binding $a_binding]) ;; esac done ;; esac dnl Allow the ocaml libdir to be overridden. This could go in a configure dnl script for bindings/ocaml/configure, except that its auto value depends on dnl OCAMLC, which is found here to support tests. AC_ARG_WITH([ocaml-libdir], [AS_HELP_STRING([--with-ocaml-libdir], [Specify install location for ocaml bindings (default is stdlib)])], [], [withval=auto]) case "$withval" in auto) with_ocaml_libdir="$withval" ;; /* | [[A-Za-z]]:[[\\/]]*) with_ocaml_libdir="$withval" ;; *) AC_MSG_ERROR([Invalid path for --with-ocaml-libdir. Provide full path]) ;; esac dnl Allow linking of LLVM with GPLv3 binutils code. AC_ARG_WITH(binutils-include, AS_HELP_STRING([--with-binutils-include], [Specify path to binutils/include/ containing plugin-api.h file for gold plugin.]),, withval=default) case "$withval" in default) WITH_BINUTILS_INCDIR=default ;; /* | [[A-Za-z]]:[[\\/]]*) WITH_BINUTILS_INCDIR=$withval ;; *) AC_MSG_ERROR([Invalid path for --with-binutils-include. Provide full path]) ;; esac if test "x$WITH_BINUTILS_INCDIR" != xdefault ; then AC_SUBST(BINUTILS_INCDIR,$WITH_BINUTILS_INCDIR) if test ! -f "$WITH_BINUTILS_INCDIR/plugin-api.h"; then echo "$WITH_BINUTILS_INCDIR/plugin-api.h" AC_MSG_ERROR([Invalid path to directory containing plugin-api.h.]); fi fi dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 4: Check for programs we need and that they are the right version dnl=== dnl===-----------------------------------------------------------------------=== dnl Check for compilation tools AC_PROG_CPP AC_PROG_CC(gcc) AC_PROG_CXX(g++) AC_PROG_NM AC_SUBST(NM) dnl Check for the tools that the makefiles require AC_CHECK_GNU_MAKE AC_PROG_LN_S AC_PATH_PROG(CMP, [cmp], [cmp]) AC_PATH_PROG(CP, [cp], [cp]) AC_PATH_PROG(DATE, [date], [date]) AC_PATH_PROG(FIND, [find], [find]) AC_PATH_PROG(GREP, [grep], [grep]) AC_PATH_PROG(MKDIR,[mkdir],[mkdir]) AC_PATH_PROG(MV, [mv], [mv]) AC_PROG_RANLIB AC_PATH_PROG(RM, [rm], [rm]) AC_PATH_PROG(SED, [sed], [sed]) AC_PATH_PROG(TAR, [tar], [gtar]) AC_PATH_PROG(BINPWD,[pwd], [pwd]) dnl Looking for misc. graph plotting software AC_PATH_PROG(GRAPHVIZ, [Graphviz], [echo Graphviz]) if test "$GRAPHVIZ" != "echo Graphviz" ; then AC_DEFINE([HAVE_GRAPHVIZ],[1],[Define if the Graphviz program is available]) dnl If we're targeting for mingw we should emit windows paths, not msys if test "$llvm_cv_os_type" = "MingW" ; then GRAPHVIZ=`echo $GRAPHVIZ | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' ` fi AC_DEFINE_UNQUOTED([LLVM_PATH_GRAPHVIZ],"$GRAPHVIZ${EXEEXT}", [Define to path to Graphviz program if found or 'echo Graphviz' otherwise]) fi AC_PATH_PROG(DOT, [dot], [echo dot]) if test "$DOT" != "echo dot" ; then AC_DEFINE([HAVE_DOT],[1],[Define if the dot program is available]) dnl If we're targeting for mingw we should emit windows paths, not msys if test "$llvm_cv_os_type" = "MingW" ; then DOT=`echo $DOT | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' ` fi AC_DEFINE_UNQUOTED([LLVM_PATH_DOT],"$DOT${EXEEXT}", [Define to path to dot program if found or 'echo dot' otherwise]) fi AC_PATH_PROGS(GV, [gv gsview32], [echo gv]) if test "$GV" != "echo gv" ; then AC_DEFINE([HAVE_GV],[1],[Define if the gv program is available]) dnl If we're targeting for mingw we should emit windows paths, not msys if test "$llvm_cv_os_type" = "MingW" ; then GV=`echo $GV | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' ` fi AC_DEFINE_UNQUOTED([LLVM_PATH_GV],"$GV${EXEEXT}", [Define to path to gv program if found or 'echo gv' otherwise]) fi AC_PATH_PROG(DOTTY, [dotty], [echo dotty]) if test "$DOTTY" != "echo dotty" ; then AC_DEFINE([HAVE_DOTTY],[1],[Define if the dotty program is available]) dnl If we're targeting for mingw we should emit windows paths, not msys if test "$llvm_cv_os_type" = "MingW" ; then DOTTY=`echo $DOTTY | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' ` fi AC_DEFINE_UNQUOTED([LLVM_PATH_DOTTY],"$DOTTY${EXEEXT}", [Define to path to dotty program if found or 'echo dotty' otherwise]) fi dnl Look for a sufficiently recent version of Perl. LLVM_PROG_PERL([5.006]) AC_SUBST(PERL) if test x"$PERL" = xnone; then AC_SUBST(HAVE_PERL,0) AC_MSG_ERROR([perl is required but was not found, please install it]) else AC_SUBST(HAVE_PERL,1) fi dnl Find the install program AC_PROG_INSTALL dnl Checks for documentation and testing tools that we can do without. If these dnl are not found then they are set to "true" which always succeeds but does dnl nothing. This just lets the build output show that we could have done dnl something if the tool was available. AC_PATH_PROG(BZIP2, [bzip2]) AC_PATH_PROG(DOXYGEN, [doxygen]) AC_PATH_PROG(GROFF, [groff]) AC_PATH_PROG(GZIP, [gzip]) AC_PATH_PROG(POD2HTML, [pod2html]) AC_PATH_PROG(POD2MAN, [pod2man]) AC_PATH_PROG(RUNTEST, [runtest]) DJ_AC_PATH_TCLSH AC_PATH_PROG(ZIP, [zip]) AC_PATH_PROGS(OCAMLC, [ocamlc]) AC_PATH_PROGS(OCAMLOPT, [ocamlopt]) AC_PATH_PROGS(OCAMLDEP, [ocamldep]) AC_PATH_PROGS(OCAMLDOC, [ocamldoc]) AC_PATH_PROGS(GAS, [gas as]) dnl Determine whether the linker supports the -R option. AC_LINK_USE_R dnl Determine whether the linker supports the -export-dynamic option. AC_LINK_EXPORT_DYNAMIC dnl Check for libtool and the library that has dlopen function (which must come dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with dnl libtool). AC_LIBTOOL_DLOPEN AC_LIB_LTDL AC_PROG_LIBTOOL if test "$lt_cv_dlopen_self" = "yes" ; then AC_DEFINE([CAN_DLOPEN_SELF],[1], [Define if dlopen(0) will open the symbols of the program]) fi if test "$WITH_LLVMGCCDIR" = "default" ; then LLVMGCC="llvm-gcc${EXEEXT}" LLVMGXX="llvm-g++${EXEEXT}" AC_PATH_PROG(LLVMGCC, $LLVMGCC, []) AC_PATH_PROG(LLVMGXX, $LLVMGXX, []) else if test -z "$LLVMGCC"; then LLVMGCC="$WITH_LLVMGCCDIR/bin/llvm-gcc${EXEEXT}" fi if test -z "$LLVMGXX"; then LLVMGXX="$WITH_LLVMGCCDIR/bin/llvm-g++${EXEEXT}" fi AC_SUBST(LLVMGCC,$LLVMGCC) AC_SUBST(LLVMGXX,$LLVMGXX) fi AC_MSG_CHECKING([tool compatibility]) dnl Ensure that compilation tools are GCC or a GNU compatible compiler such as dnl ICC; we use GCC specific options in the makefiles so the compiler needs dnl to support those options. dnl "icc" emits gcc signatures dnl "icc -no-gcc" emits no gcc signature BUT is still compatible ICC=no IXX=no case $CC in icc*|icpc*) ICC=yes IXX=yes ;; *) ;; esac if test "$GCC" != "yes" && test "$ICC" != "yes" then AC_MSG_ERROR([gcc|icc required but not found]) fi dnl Ensure that compilation tools are GCC; we use GCC specific extensions if test "$GXX" != "yes" && test "$IXX" != "yes" then AC_MSG_ERROR([g++|icc required but not found]) fi dnl Verify that GCC is version 3.0 or higher if test "$GCC" = "yes" then AC_COMPILE_IFELSE([[#if !defined(__GNUC__) || __GNUC__ < 3 #error Unsupported GCC version #endif ]], [], [AC_MSG_ERROR([gcc 3.x required, but you have a lower version])]) fi dnl Check for GNU Make. We use its extensions, so don't build without it if test -z "$llvm_cv_gnu_make_command" then AC_MSG_ERROR([GNU Make required but not found]) fi dnl Tool compatibility is okay if we make it here. AC_MSG_RESULT([ok]) dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 5: Check for libraries dnl=== dnl===-----------------------------------------------------------------------=== dnl libelf is for sparc only; we can ignore it if we don't have it AC_CHECK_LIB(elf, elf_begin) AC_CHECK_LIB(m,sin) if test "$llvm_cv_os_type" = "MingW" ; then AC_CHECK_LIB(imagehlp, main) AC_CHECK_LIB(psapi, main) fi dnl dlopen() is required for plugin support. AC_SEARCH_LIBS(dlopen,dl,AC_DEFINE([HAVE_DLOPEN],[1], [Define if dlopen() is available on this platform.]), AC_MSG_WARN([dlopen() not found - disabling plugin support])) dnl libffi is optional; used to call external functions from the interpreter AC_CHECK_LIB(ffi,ffi_call,[have_libffi=1], AC_MSG_WARN([libffi not found - disabling external calls from interpreter])) dnl mallinfo is optional; the code can compile (minus features) without it AC_SEARCH_LIBS(mallinfo,malloc,AC_DEFINE([HAVE_MALLINFO],[1], [Define if mallinfo() is available on this platform.])) dnl pthread locking functions are optional - but llvm will not be thread-safe dnl without locks. if test "$ENABLE_THREADS" -eq 1 ; then AC_CHECK_LIB(pthread,pthread_mutex_init) AC_SEARCH_LIBS(pthread_mutex_lock,pthread, AC_DEFINE([HAVE_PTHREAD_MUTEX_LOCK],[1], [Have pthread_mutex_lock])) fi dnl Allow extra x86-disassembler library AC_ARG_WITH(udis86, AS_HELP_STRING([--with-udis86=], [Use udis86 external x86 disassembler library]), [ AC_SUBST(USE_UDIS86, [1]) case "$withval" in /usr/lib|yes) ;; *) LDFLAGS="$LDFLAGS -L${withval}" ;; esac AC_CHECK_LIB(udis86, ud_init, [], [ echo "Error! You need to have libudis86 around." exit -1 ]) ], AC_SUBST(USE_UDIS86, [0])) AC_DEFINE_UNQUOTED([USE_UDIS86],$USE_UDIS86, [Define if use udis86 library]) dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 6: Check for header files dnl=== dnl===-----------------------------------------------------------------------=== dnl First, use autoconf provided macros for specific headers that we need dnl We don't check for ancient stuff or things that are guaranteed to be there dnl by the C++ standard. We always use the versions of C headers. dnl Generally we're looking for POSIX headers. AC_HEADER_DIRENT AC_HEADER_MMAP_ANONYMOUS AC_HEADER_STAT AC_HEADER_STDC AC_HEADER_SYS_WAIT AC_HEADER_TIME AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h limits.h link.h]) AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h unistd.h utime.h]) AC_CHECK_HEADERS([windows.h]) AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h]) AC_CHECK_HEADERS([sys/types.h malloc/malloc.h mach/mach.h]) if test "$ENABLE_THREADS" -eq 1 ; then AC_CHECK_HEADERS(pthread.h, AC_SUBST(HAVE_PTHREAD, 1), AC_SUBST(HAVE_PTHREAD, 0)) else AC_SUBST(HAVE_PTHREAD, 0) fi dnl Once we know we have libffi, try to find ffi.h. if test -n "$have_libffi" ; then AC_CHECK_HEADERS([ffi.h ffi/ffi.h], [AC_SUBST(HAVE_FFI, 1)]) fi dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 7: Check for types and structures dnl=== dnl===-----------------------------------------------------------------------=== AC_HUGE_VAL_CHECK AC_TYPE_PID_T AC_TYPE_SIZE_T AC_TYPE_SIGNAL AC_STRUCT_TM AC_CHECK_TYPES([int64_t],,AC_MSG_ERROR([Type int64_t required but not found])) AC_CHECK_TYPES([uint64_t],, AC_CHECK_TYPES([u_int64_t],, AC_MSG_ERROR([Type uint64_t or u_int64_t required but not found]))) dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 8: Check for specific functions needed dnl=== dnl===-----------------------------------------------------------------------=== AC_CHECK_FUNCS([backtrace ceilf floorf roundf rintf nearbyintf getcwd ]) AC_CHECK_FUNCS([powf fmodf strtof round ]) AC_CHECK_FUNCS([getpagesize getrusage getrlimit setrlimit gettimeofday ]) AC_CHECK_FUNCS([isatty mkdtemp mkstemp ]) AC_CHECK_FUNCS([mktemp realpath sbrk setrlimit strdup strerror strerror_r ]) AC_CHECK_FUNCS([strtoll strtoq sysconf malloc_zone_statistics ]) AC_CHECK_FUNCS([setjmp longjmp sigsetjmp siglongjmp]) AC_C_PRINTF_A AC_FUNC_ALLOCA AC_FUNC_RAND48 dnl Check for variations in the Standard C++ library and STL. These macros are dnl provided by LLVM in the autoconf/m4 directory. AC_CXX_HAVE_HASH_MAP AC_CXX_HAVE_HASH_SET AC_CXX_HAVE_STD_ITERATOR AC_CXX_HAVE_BI_ITERATOR AC_CXX_HAVE_FWD_ITERATOR AC_FUNC_ISNAN AC_FUNC_ISINF dnl Check for mmap support.We also need to know if /dev/zero is required to dnl be opened for allocating RWX memory. dnl Make sure we aren't attempting to configure for an unknown system if test "$llvm_cv_platform_type" = "Unix" ; then AC_FUNC_MMAP AC_FUNC_MMAP_FILE AC_NEED_DEV_ZERO_FOR_MMAP if test "$ac_cv_func_mmap_fixed_mapped" = "no" then AC_MSG_WARN([mmap() of a fixed address required but not supported]) fi if test "$ac_cv_func_mmap_file" = "no" then AC_MSG_WARN([mmap() of files required but not found]) fi fi dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 9: Additional checks, variables, etc. dnl=== dnl===-----------------------------------------------------------------------=== dnl Check, whether __dso_handle is present AC_CHECK_FUNCS([__dso_handle]) dnl See if the llvm-gcc executable can compile to LLVM assembly AC_CACHE_CHECK([whether llvm-gcc is sane],[llvm_cv_llvmgcc_sanity], [llvm_cv_llvmgcc_sanity="no" if test -x "$LLVMGCC" ; then cp /dev/null conftest.c "$LLVMGCC" -emit-llvm -S -o - conftest.c | \ grep 'target datalayout =' > /dev/null 2>&1 if test $? -eq 0 ; then llvm_cv_llvmgcc_sanity="yes" fi rm conftest.c fi]) dnl Since we have a sane llvm-gcc, identify it and its sub-tools if test "$llvm_cv_llvmgcc_sanity" = "yes" ; then AC_MSG_CHECKING([llvm-gcc component support]) llvmcc1path=`"$LLVMGCC" --print-prog-name=cc1` AC_SUBST(LLVMCC1,$llvmcc1path) llvmcc1pluspath=`"$LLVMGCC" --print-prog-name=cc1plus` AC_SUBST(LLVMCC1PLUS,$llvmcc1pluspath) llvmgccdir=`echo "$llvmcc1path" | sed 's,/libexec/.*,,'` AC_SUBST(LLVMGCCDIR,$llvmgccdir) llvmgcclibexec=`echo "$llvmcc1path" | sed 's,/cc1,,'` AC_SUBST(LLVMGCCLIBEXEC,$llvmgcclibexec) llvmgccversion=[`"$LLVMGCC" -dumpversion 2>&1 | sed 's/^\([0-9.]*\).*/\1/'`] llvmgccmajvers=[`echo $llvmgccversion | sed 's/^\([0-9]\).*/\1/'`] AC_SUBST(LLVMGCC_VERSION,$llvmgccversion) AC_SUBST(LLVMGCC_MAJVERS,$llvmgccmajvers) llvmgcclangs=[`"$LLVMGCC" -v --help 2>&1 | grep '^Configured with:' | sed 's/^.*--enable-languages=\([^ ]*\).*/\1/'`] AC_SUBST(LLVMGCC_LANGS,$llvmgcclangs) AC_MSG_RESULT([ok]) fi dnl Propagate the shared library extension that the libltdl checks did to dnl the Makefiles so we can use it there too AC_SUBST(SHLIBEXT,$libltdl_cv_shlibext) # Translate the various configuration directories and other basic # information into substitutions that will end up in Makefile.config.in # that these configured values can be used by the makefiles if test "${prefix}" = "NONE" ; then prefix="/usr/local" fi eval LLVM_PREFIX="${prefix}"; eval LLVM_BINDIR="${prefix}/bin"; eval LLVM_LIBDIR="${prefix}/lib"; eval LLVM_DATADIR="${prefix}/share/llvm"; eval LLVM_DOCSDIR="${prefix}/docs/llvm"; eval LLVM_ETCDIR="${prefix}/etc/llvm"; eval LLVM_INCLUDEDIR="${prefix}/include"; eval LLVM_INFODIR="${prefix}/info"; eval LLVM_MANDIR="${prefix}/man"; LLVM_CONFIGTIME=`date` AC_SUBST(LLVM_PREFIX) AC_SUBST(LLVM_BINDIR) AC_SUBST(LLVM_LIBDIR) AC_SUBST(LLVM_DATADIR) AC_SUBST(LLVM_DOCSDIR) AC_SUBST(LLVM_ETCDIR) AC_SUBST(LLVM_INCLUDEDIR) AC_SUBST(LLVM_INFODIR) AC_SUBST(LLVM_MANDIR) AC_SUBST(LLVM_CONFIGTIME) # Place the various directores into the config.h file as #defines so that we # can know about the installation paths within LLVM. AC_DEFINE_UNQUOTED(LLVM_PREFIX,"$LLVM_PREFIX", [Installation prefix directory]) AC_DEFINE_UNQUOTED(LLVM_BINDIR, "$LLVM_BINDIR", [Installation directory for binary executables]) AC_DEFINE_UNQUOTED(LLVM_LIBDIR, "$LLVM_LIBDIR", [Installation directory for libraries]) AC_DEFINE_UNQUOTED(LLVM_DATADIR, "$LLVM_DATADIR", [Installation directory for data files]) AC_DEFINE_UNQUOTED(LLVM_DOCSDIR, "$LLVM_DOCSDIR", [Installation directory for documentation]) AC_DEFINE_UNQUOTED(LLVM_ETCDIR, "$LLVM_ETCDIR", [Installation directory for config files]) AC_DEFINE_UNQUOTED(LLVM_INCLUDEDIR, "$LLVM_INCLUDEDIR", [Installation directory for include files]) AC_DEFINE_UNQUOTED(LLVM_INFODIR, "$LLVM_INFODIR", [Installation directory for .info files]) AC_DEFINE_UNQUOTED(LLVM_MANDIR, "$LLVM_MANDIR", [Installation directory for man pages]) AC_DEFINE_UNQUOTED(LLVM_CONFIGTIME, "$LLVM_CONFIGTIME", [Time at which LLVM was configured]) AC_DEFINE_UNQUOTED(LLVM_HOSTTRIPLE, "$host", [Host triple we were built on]) # Determine which bindings to build. if test "$BINDINGS_TO_BUILD" = auto ; then BINDINGS_TO_BUILD="" if test "x$OCAMLC" != x -a "x$OCAMLDEP" != x ; then BINDINGS_TO_BUILD="ocaml $BINDINGS_TO_BUILD" fi fi AC_SUBST(BINDINGS_TO_BUILD,$BINDINGS_TO_BUILD) # This isn't really configurey, but it avoids having to repeat the list in # other files. AC_SUBST(ALL_BINDINGS,ocaml) # Do any work necessary to ensure that bindings have what they need. binding_prereqs_failed=0 for a_binding in $BINDINGS_TO_BUILD ; do case "$a_binding" in ocaml) if test "x$OCAMLC" = x ; then AC_MSG_WARN([--enable-bindings=ocaml specified, but ocamlc not found. Try configure OCAMLC=/path/to/ocamlc]) binding_prereqs_failed=1 fi if test "x$OCAMLDEP" = x ; then AC_MSG_WARN([--enable-bindings=ocaml specified, but ocamldep not found. Try configure OCAMLDEP=/path/to/ocamldep]) binding_prereqs_failed=1 fi if test "x$OCAMLOPT" = x ; then AC_MSG_WARN([--enable-bindings=ocaml specified, but ocamlopt not found. Try configure OCAMLOPT=/path/to/ocamlopt]) dnl ocamlopt is optional! fi if test "x$with_ocaml_libdir" != xauto ; then AC_SUBST(OCAML_LIBDIR,$with_ocaml_libdir) else ocaml_stdlib="`"$OCAMLC" -where`" if test "$LLVM_PREFIX" '<' "$ocaml_stdlib" -a "$ocaml_stdlib" '<' "$LLVM_PREFIX~" then # ocaml stdlib is beneath our prefix; use stdlib AC_SUBST(OCAML_LIBDIR,$ocaml_stdlib) else # ocaml stdlib is outside our prefix; use libdir/ocaml AC_SUBST(OCAML_LIBDIR,$LLVM_LIBDIR/ocaml) fi fi ;; esac done if test "$binding_prereqs_failed" = 1 ; then AC_MSG_ERROR([Prequisites for bindings not satisfied. Fix them or use configure --disable-bindings.]) fi dnl Determine whether the compiler supports -fvisibility-inlines-hidden. AC_CXX_USE_VISIBILITY_INLINES_HIDDEN dnl Determine linker rpath flag if test "$llvm_cv_link_use_r" = "yes" ; then RPATH="-Wl,-R" else RPATH="-Wl,-rpath" fi AC_SUBST(RPATH) dnl Determine linker rdynamic flag if test "$llvm_cv_link_use_export_dynamic" = "yes" ; then RDYNAMIC="-Wl,-export-dynamic" else RDYNAMIC="" fi AC_SUBST(RDYNAMIC) dnl===-----------------------------------------------------------------------=== dnl=== dnl=== SECTION 10: Specify the output files and generate it dnl=== dnl===-----------------------------------------------------------------------=== dnl Configure header files dnl WARNING: dnl If you add or remove any of the following config headers, then dnl you MUST also update Makefile.rules so that the variable FilesToConfig dnl contains the same list of files as AC_CONFIG_HEADERS below. This ensures the dnl files can be updated automatically when their *.in sources change. AC_CONFIG_HEADERS([include/llvm/Config/config.h]) AC_CONFIG_HEADERS([include/llvm/Support/DataTypes.h]) AC_CONFIG_HEADERS([include/llvm/ADT/hash_map.h]) AC_CONFIG_HEADERS([include/llvm/ADT/hash_set.h]) AC_CONFIG_HEADERS([include/llvm/ADT/iterator.h]) dnl Configure the makefile's configuration data AC_CONFIG_FILES([Makefile.config]) dnl Configure the RPM spec file for LLVM AC_CONFIG_FILES([llvm.spec]) dnl Configure doxygen's configuration file AC_CONFIG_FILES([docs/doxygen.cfg]) dnl Do the first stage of configuration for llvm-config.in. AC_CONFIG_FILES([tools/llvm-config/llvm-config.in]) dnl Do special configuration of Makefiles AC_CONFIG_COMMANDS([setup],,[llvm_src="${srcdir}"]) AC_CONFIG_MAKEFILE(Makefile) AC_CONFIG_MAKEFILE(Makefile.common) AC_CONFIG_MAKEFILE(examples/Makefile) AC_CONFIG_MAKEFILE(lib/Makefile) AC_CONFIG_MAKEFILE(runtime/Makefile) AC_CONFIG_MAKEFILE(test/Makefile) AC_CONFIG_MAKEFILE(test/Makefile.tests) AC_CONFIG_MAKEFILE(unittests/Makefile) AC_CONFIG_MAKEFILE(tools/Makefile) AC_CONFIG_MAKEFILE(utils/Makefile) AC_CONFIG_MAKEFILE(projects/Makefile) AC_CONFIG_MAKEFILE(bindings/Makefile) AC_CONFIG_MAKEFILE(bindings/ocaml/Makefile.ocaml) dnl Finally, crank out the output AC_OUTPUT