path: root/autoconf/configure.ac

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]],[[2.7svn]],[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) 2003-2009 University of Illinois at Urbana-Champaign."])
AC_COPYRIGHT([Copyright (c) 2003-2009 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"