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configure.ac
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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 address for reporting bugs.
AC_INIT([LLVM],[3.1svn],[http://llvm.org/bugs/])
AC_DEFINE([LLVM_VERSION_MAJOR], [3], [Major version of the LLVM API])
AC_DEFINE([LLVM_VERSION_MINOR], [1], [Minor version of the LLVM API])
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) 2003-2012 University of Illinois at Urbana-Champaign."])
AC_COPYRIGHT([Copyright (c) 2003-2012 University of Illinois at Urbana-Champaign.])
dnl Indicate that we require autoconf 2.60 or later.
AC_PREREQ(2.60)
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 We need to check for the compiler up here to avoid anything else
dnl starting with a different one.
AC_PROG_CC(clang llvm-gcc gcc)
AC_PROG_CXX(clang++ llvm-g++ g++)
AC_PROG_CPP
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.
dnl
dnl One tricky part of doing this is that some projects depend upon other
dnl projects. For example, several projects rely upon the LLVM test suite.
dnl We want to configure those projects first so that their object trees are
dnl created before running the configure scripts of projects that depend upon
dnl them.
dnl
dnl Several projects use llvm-gcc, so configure that first
if test -d ${srcdir}/projects/llvm-gcc ; then
AC_CONFIG_SUBDIRS([projects/llvm-gcc])
fi
dnl Several projects use the LLVM test suite, so configure it next.
if test -d ${srcdir}/projects/test-suite ; then
AC_CONFIG_SUBDIRS([projects/test-suite])
fi
dnl llvm-test is the old name of the test-suite, kept here for backwards
dnl compatibility
if test -d ${srcdir}/projects/llvm-test ; then
AC_CONFIG_SUBDIRS([projects/llvm-test])
fi
dnl Some projects use poolalloc; configure that next
if test -d ${srcdir}/projects/poolalloc ; then
AC_CONFIG_SUBDIRS([projects/poolalloc])
fi
if test -d ${srcdir}/projects/llvm-poolalloc ; then
AC_CONFIG_SUBDIRS([projects/llvm-poolalloc])
fi
dnl Check for all other projects
for i in `ls ${srcdir}/projects`
do
if test -d ${srcdir}/projects/${i} ; then
case ${i} in
sample) AC_CONFIG_SUBDIRS([projects/sample]) ;;
privbracket) AC_CONFIG_SUBDIRS([projects/privbracket]) ;;
llvm-stacker) AC_CONFIG_SUBDIRS([projects/llvm-stacker]) ;;
llvm-reopt) AC_CONFIG_SUBDIRS([projects/llvm-reopt]);;
llvm-java) AC_CONFIG_SUBDIRS([projects/llvm-java]) ;;
llvm-tv) AC_CONFIG_SUBDIRS([projects/llvm-tv]) ;;
safecode) AC_CONFIG_SUBDIRS([projects/safecode]) ;;
llvm-kernel) AC_CONFIG_SUBDIRS([projects/llvm-kernel]) ;;
compiler-rt) ;;
llvm-gcc) ;;
test-suite) ;;
llvm-test) ;;
poolalloc) ;;
llvm-poolalloc) ;;
*)
AC_MSG_WARN([Unknown project (${i}) won't be configured automatically])
;;
esac
fi
done
dnl Disable the build of polly, even if it is checked out into tools/polly.
AC_ARG_ENABLE(polly,
AS_HELP_STRING([--enable-polly],
[Use polly if available (default is YES)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_POLLY,[1]) ;;
no) AC_SUBST(ENABLE_POLLY,[0]) ;;
default) AC_SUBST(ENABLE_POLLY,[1]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-polly. Use "yes" or "no"]) ;;
esac
dnl Check if polly is checked out into tools/polly and configure it if
dnl available.
if (test -d ${srcdir}/tools/polly) && (test $ENABLE_POLLY -eq 1) ; then
AC_SUBST(LLVM_HAS_POLLY,1)
AC_CONFIG_SUBDIRS([tools/polly])
fi
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" ;;
*-*-minix*)
llvm_cv_link_all_option="-Wl,-all_load"
llvm_cv_no_link_all_option="-Wl,-noall_load"
llvm_cv_os_type="Minix"
llvm_cv_platform_type="Unix" ;;
*-*-freebsd* | *-*-kfreebsd-gnu)
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" ;;
*-*-gnu*)
llvm_cv_link_all_option="-Wl,--whole-archive"
llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
llvm_cv_os_type="GNU"
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" ;;
*-*-auroraux*)
llvm_cv_link_all_option="-Wl,-z,allextract"
llvm_cv_link_all_option="-Wl,-z,defaultextract"
llvm_cv_os_type="AuroraUX"
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" ;;
*-*-haiku*)
llvm_cv_link_all_option="-Wl,--whole-archive"
llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
llvm_cv_os_type="Haiku"
llvm_cv_platform_type="Unix" ;;
*-unknown-eabi*)
llvm_cv_link_all_option="-Wl,--whole-archive"
llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
llvm_cv_os_type="Freestanding"
llvm_cv_platform_type="Unix" ;;
*-unknown-elf*)
llvm_cv_link_all_option="-Wl,--whole-archive"
llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
llvm_cv_os_type="Freestanding"
llvm_cv_platform_type="Unix" ;;
*)
llvm_cv_link_all_option=""
llvm_cv_no_link_all_option=""
llvm_cv_os_type="Unknown"
llvm_cv_platform_type="Unknown" ;;
esac])
AC_CACHE_CHECK([type of operating system we're going to target],
[llvm_cv_target_os_type],
[case $target in
*-*-aix*)
llvm_cv_target_os_type="AIX" ;;
*-*-irix*)
llvm_cv_target_os_type="IRIX" ;;
*-*-cygwin*)
llvm_cv_target_os_type="Cygwin" ;;
*-*-darwin*)
llvm_cv_target_os_type="Darwin" ;;
*-*-minix*)
llvm_cv_target_os_type="Minix" ;;
*-*-freebsd*)
llvm_cv_target_os_type="FreeBSD" ;;
*-*-openbsd*)
llvm_cv_target_os_type="OpenBSD" ;;
*-*-netbsd*)
llvm_cv_target_os_type="NetBSD" ;;
*-*-dragonfly*)
llvm_cv_target_os_type="DragonFly" ;;
*-*-hpux*)
llvm_cv_target_os_type="HP-UX" ;;
*-*-interix*)
llvm_cv_target_os_type="Interix" ;;
*-*-linux*)
llvm_cv_target_os_type="Linux" ;;
*-*-solaris*)
llvm_cv_target_os_type="SunOS" ;;
*-*-auroraux*)
llvm_cv_target_os_type="AuroraUX" ;;
*-*-win32*)
llvm_cv_target_os_type="Win32" ;;
*-*-mingw*)
llvm_cv_target_os_type="MingW" ;;
*-*-haiku*)
llvm_cv_target_os_type="Haiku" ;;
*-*-rtems*)
llvm_cv_target_os_type="RTEMS" ;;
*-*-nacl*)
llvm_cv_target_os_type="NativeClient" ;;
*-unknown-eabi*)
llvm_cv_target_os_type="Freestanding" ;;
*)
llvm_cv_target_os_type="Unknown" ;;
esac])
dnl Make sure we aren't attempting to configure for an unknown system
if test "$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,$llvm_cv_os_type)
AC_SUBST(HOST_OS,$llvm_cv_os_type)
AC_SUBST(TARGET_OS,$llvm_cv_target_os_type)
dnl Set the LINKALL and NOLINKALL Makefile variables based on the platform
AC_SUBST(LINKALL,$llvm_cv_link_all_option)
AC_SUBST(NOLINKALL,$llvm_cv_no_link_all_option)
dnl Set the "LLVM_ON_*" variables based on llvm_cv_platform_type
dnl This is used by lib/Support 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 $target in
i?86-*) llvm_cv_target_arch="x86" ;;
amd64-* | x86_64-*) llvm_cv_target_arch="x86_64" ;;
sparc*-*) llvm_cv_target_arch="Sparc" ;;
powerpc*-*) llvm_cv_target_arch="PowerPC" ;;
arm*-*) llvm_cv_target_arch="ARM" ;;
mips-*) llvm_cv_target_arch="Mips" ;;
mipsel-*) llvm_cv_target_arch="Mips" ;;
xcore-*) llvm_cv_target_arch="XCore" ;;
msp430-*) llvm_cv_target_arch="MSP430" ;;
hexagon-*) llvm_cv_target_arch="Hexagon" ;;
mblaze-*) llvm_cv_target_arch="MBlaze" ;;
ptx-*) llvm_cv_target_arch="PTX" ;;
*) llvm_cv_target_arch="Unknown" ;;
esac])
if test "$llvm_cv_target_arch" = "Unknown" ; then
AC_MSG_WARN([Configuring LLVM for an unknown target archicture])
fi
dnl Determine the LLVM native architecture for the target
case "$llvm_cv_target_arch" in
x86) LLVM_NATIVE_ARCH="X86" ;;
x86_64) LLVM_NATIVE_ARCH="X86" ;;
*) LLVM_NATIVE_ARCH="$llvm_cv_target_arch" ;;
esac
dnl Define a substitution, ARCH, for the target architecture
AC_SUBST(ARCH,$llvm_cv_target_arch)
dnl Check for the endianness of the target
AC_C_BIGENDIAN(AC_SUBST([ENDIAN],[big]),AC_SUBST([ENDIAN],[little]))
dnl Check for build platform executable suffix if we're cross-compiling
if test "$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 "$BUILD_CXX"; then
AC_CHECK_PROG(BUILD_CXX, c++, c++, , , /usr/ucb/c++)
fi
fi
else
AC_SUBST(LLVM_CROSS_COMPILING, [0])
fi
dnl Check to see if there's a .svn or .git directory indicating that this
dnl build is being done from a checkout. This sets up several defaults for
dnl the command line switches. When we build with a checkout directory,
dnl we get a debug with assertions turned on. Without, we assume a source
dnl release and we get an optimized build without assertions.
dnl See --enable-optimized and --enable-assertions below
if test -d ".svn" -o -d "${srcdir}/.svn" -o -d ".git" -o -d "${srcdir}/.git"; then
cvsbuild="yes"
optimize="no"
AC_SUBST(CVSBUILD,[[CVSBUILD=1]])
else
cvsbuild="no"
optimize="yes"
fi
dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 3: Command line arguments for the configure script.
dnl===
dnl===-----------------------------------------------------------------------===
dnl --enable-libcpp : check whether or not to use libc++ on the command line
AC_ARG_ENABLE(libcpp,
AS_HELP_STRING([--enable-libcpp],
[Use libc++ if available (default is NO)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_LIBCPP,[1]) ;;
no) AC_SUBST(ENABLE_LIBCPP,[0]) ;;
default) AC_SUBST(ENABLE_LIBCPP,[0]);;
*) AC_MSG_ERROR([Invalid setting for --enable-libcpp. Use "yes" or "no"]) ;;
esac
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-profiling : check whether they want to do a profile build:
AC_ARG_ENABLE(profiling, AS_HELP_STRING(
--enable-profiling,[Compile with profiling enabled (default is NO)]),,enableval="no")
if test ${enableval} = "no" ; then
AC_SUBST(ENABLE_PROFILING,[[]])
else
AC_SUBST(ENABLE_PROFILING,[[ENABLE_PROFILING=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-debug-symbols : should even optimized compiler libraries
dnl have debug symbols?
AC_ARG_ENABLE(debug-symbols,
AS_HELP_STRING(--enable-debug-symbols,[Build compiler with debug symbols (default is NO if optimization is on and YES if it's off)]),,enableval=no)
if test ${enableval} = "no" ; then
AC_SUBST(DEBUG_SYMBOLS,[[]])
else
AC_SUBST(DEBUG_SYMBOLS,[[DEBUG_SYMBOLS=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) ;;
ARM) AC_SUBST(TARGET_HAS_JIT,1) ;;
Mips) AC_SUBST(TARGET_HAS_JIT,1) ;;
XCore) AC_SUBST(TARGET_HAS_JIT,0) ;;
MSP430) AC_SUBST(TARGET_HAS_JIT,0) ;;
Hexagon) AC_SUBST(TARGET_HAS_JIT,0) ;;
MBlaze) AC_SUBST(TARGET_HAS_JIT,0) ;;
PTX) AC_SUBST(TARGET_HAS_JIT,0) ;;
*) AC_SUBST(TARGET_HAS_JIT,0) ;;
esac
fi
dnl Allow enablement of building and installing docs
AC_ARG_ENABLE(docs,
AS_HELP_STRING([--enable-docs],
[Build documents (default is YES)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_DOCS,[1]) ;;
no) AC_SUBST(ENABLE_DOCS,[0]) ;;
default) AC_SUBST(ENABLE_DOCS,[1]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-docs. Use "yes" or "no"]) ;;
esac
dnl Allow enablement of doxygen generated documentation
AC_ARG_ENABLE(doxygen,
AS_HELP_STRING([--enable-doxygen],
[Build doxygen documentation (default is NO)]),,
enableval=default)
case "$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 "$enableval" in
yes) AC_SUBST(LLVM_ENABLE_THREADS,[1]) ;;
no) AC_SUBST(LLVM_ENABLE_THREADS,[0]) ;;
default) AC_SUBST(LLVM_ENABLE_THREADS,[1]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-threads. Use "yes" or "no"]) ;;
esac
AC_DEFINE_UNQUOTED([LLVM_ENABLE_THREADS],$LLVM_ENABLE_THREADS,
[Define if threads enabled])
dnl Allow disablement of pthread.h
AC_ARG_ENABLE(pthreads,
AS_HELP_STRING([--enable-pthreads],
[Use pthreads if available (default is YES)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_PTHREADS,[1]) ;;
no) AC_SUBST(ENABLE_PTHREADS,[0]) ;;
default) AC_SUBST(ENABLE_PTHREADS,[1]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-pthreads. Use "yes" or "no"]) ;;
esac
dnl Allow building without position independent code
AC_ARG_ENABLE(pic,
AS_HELP_STRING([--enable-pic],
[Build LLVM with Position Independent Code (default is YES)]),,
enableval=default)
case "$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],$ENABLE_PIC,
[Define if position independent code is enabled])
dnl Allow building a shared library and linking tools against it.
AC_ARG_ENABLE(shared,
AS_HELP_STRING([--enable-shared],
[Build a shared library and link tools against it (default is NO)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_SHARED,[1]) ;;
no) AC_SUBST(ENABLE_SHARED,[0]) ;;
default) AC_SUBST(ENABLE_SHARED,[0]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-shared. Use "yes" or "no"]) ;;
esac
dnl Allow libstdc++ is embedded in LLVM.dll.
AC_ARG_ENABLE(embed-stdcxx,
AS_HELP_STRING([--enable-embed-stdcxx],
[Build a shared library with embedded libstdc++ for Win32 DLL (default is NO)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_EMBED_STDCXX,[1]) ;;
no) AC_SUBST(ENABLE_EMBED_STDCXX,[0]) ;;
default) AC_SUBST(ENABLE_EMBED_STDCXX,[0]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-embed-stdcxx. Use "yes" or "no"]) ;;
esac
dnl Enable embedding timestamp information into build.
AC_ARG_ENABLE(timestamps,
AS_HELP_STRING([--enable-timestamps],
[Enable embedding timestamp information in build (default is YES)]),,
enableval=default)
case "$enableval" in
yes) AC_SUBST(ENABLE_TIMESTAMPS,[1]) ;;
no) AC_SUBST(ENABLE_TIMESTAMPS,[0]) ;;
default) AC_SUBST(ENABLE_TIMESTAMPS,[1]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-timestamps. Use "yes" or "no"]) ;;
esac
AC_DEFINE_UNQUOTED([ENABLE_TIMESTAMPS],$ENABLE_TIMESTAMPS,
[Define if timestamp information (e.g., __DATE___) is allowed])
dnl Allow specific targets to be specified for building (or not)
TARGETS_TO_BUILD=""
AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets],
[Build specific host targets: all or target1,target2,... Valid targets are:
host, x86, x86_64, sparc, powerpc, arm, mips, spu, hexagon,
xcore, msp430, ptx, cbe, and cpp (default=all)]),,
enableval=all)
if test "$enableval" = host-only ; then
enableval=host
fi
case "$enableval" in
all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 CBackend CppBackend MBlaze PTX Hexagon" ;;
*)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" ;;
arm) TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
mips) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
mipsel) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
spu) TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;;
xcore) TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
msp430) TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
cbe) TARGETS_TO_BUILD="CBackend $TARGETS_TO_BUILD" ;;
cpp) TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
hexagon) TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
mblaze) TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
ptx) TARGETS_TO_BUILD="PTX $TARGETS_TO_BUILD" ;;
host) case "$llvm_cv_target_arch" 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" ;;
ARM) TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
Mips) TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
MBlaze) TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
CellSPU|SPU) TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;;
XCore) TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
MSP430) TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
Hexagon) TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
PTX) TARGETS_TO_BUILD="PTX $TARGETS_TO_BUILD" ;;
*) AC_MSG_ERROR([Can not set target to build]) ;;
esac ;;
*) AC_MSG_ERROR([Unrecognized target $a_target]) ;;
esac
done
;;
esac
AC_SUBST(TARGETS_TO_BUILD,$TARGETS_TO_BUILD)
dnl Determine whether we are building LLVM support for the native architecture.
dnl If so, define LLVM_NATIVE_ARCH to that LLVM target.
for a_target in $TARGETS_TO_BUILD; do
if test "$a_target" = "$LLVM_NATIVE_ARCH"; then
AC_DEFINE_UNQUOTED(LLVM_NATIVE_ARCH, $LLVM_NATIVE_ARCH,
[LLVM architecture name for the native architecture, if available])
LLVM_NATIVE_TARGET="LLVMInitialize${LLVM_NATIVE_ARCH}Target"
LLVM_NATIVE_TARGETINFO="LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo"
LLVM_NATIVE_TARGETMC="LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC"
LLVM_NATIVE_ASMPRINTER="LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter"
if test -f ${srcdir}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/Makefile ; then
LLVM_NATIVE_ASMPARSER="LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser"
fi
AC_DEFINE_UNQUOTED(LLVM_NATIVE_TARGET, $LLVM_NATIVE_TARGET,
[LLVM name for the native Target init function, if available])
AC_DEFINE_UNQUOTED(LLVM_NATIVE_TARGETINFO, $LLVM_NATIVE_TARGETINFO,
[LLVM name for the native TargetInfo init function, if available])
AC_DEFINE_UNQUOTED(LLVM_NATIVE_TARGETMC, $LLVM_NATIVE_TARGETMC,
[LLVM name for the native target MC init function, if available])
AC_DEFINE_UNQUOTED(LLVM_NATIVE_ASMPRINTER, $LLVM_NATIVE_ASMPRINTER,
[LLVM name for the native AsmPrinter init function, if available])
if test -f ${srcdir}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/Makefile ; then
AC_DEFINE_UNQUOTED(LLVM_NATIVE_ASMPARSER, $LLVM_NATIVE_ASMPARSER,
[LLVM name for the native AsmParser init function, if available])
fi
fi
done
dnl Build the LLVM_TARGET and LLVM_... macros for Targets.def and the individual
dnl target feature def files.
LLVM_ENUM_TARGETS=""
LLVM_ENUM_ASM_PRINTERS=""
LLVM_ENUM_ASM_PARSERS=""
LLVM_ENUM_DISASSEMBLERS=""
for target_to_build in $TARGETS_TO_BUILD; do
LLVM_ENUM_TARGETS="LLVM_TARGET($target_to_build) $LLVM_ENUM_TARGETS"
if test -f ${srcdir}/lib/Target/${target_to_build}/*AsmPrinter.cpp ; then
LLVM_ENUM_ASM_PRINTERS="LLVM_ASM_PRINTER($target_to_build) $LLVM_ENUM_ASM_PRINTERS";
fi
if test -f ${srcdir}/lib/Target/${target_to_build}/AsmParser/Makefile ; then
LLVM_ENUM_ASM_PARSERS="LLVM_ASM_PARSER($target_to_build) $LLVM_ENUM_ASM_PARSERS";
fi
if test -f ${srcdir}/lib/Target/${target_to_build}/Disassembler/Makefile ; then
LLVM_ENUM_DISASSEMBLERS="LLVM_DISASSEMBLER($target_to_build) $LLVM_ENUM_DISASSEMBLERS";
fi
done
AC_SUBST(LLVM_ENUM_TARGETS)
AC_SUBST(LLVM_ENUM_ASM_PRINTERS)
AC_SUBST(LLVM_ENUM_ASM_PARSERS)
AC_SUBST(LLVM_ENUM_DISASSEMBLERS)
dnl Prevent the CBackend from using printf("%a") for floating point so older
dnl C compilers that cannot deal with the 0x0p+0 hex floating point format
dnl can still compile the CBE's output
AC_ARG_ENABLE([cbe-printf-a],AS_HELP_STRING([--enable-cbe-printf-a],
[Enable C Backend output with hex floating point via %a (default is YES)]),,
enableval=default)
case "$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],$ENABLE_CBE_PRINTF_A,
[Define if CBE is enabled for printf %a output])
dnl Override the option to use for optimized builds.
AC_ARG_WITH(optimize-option,
AS_HELP_STRING([--with-optimize-option],
[Select the compiler options to use for optimized builds]),,
withval=default)
AC_MSG_CHECKING([optimization flags])
case "$withval" in
default)
case "$llvm_cv_os_type" in
FreeBSD) optimize_option=-O2 ;;
MingW) optimize_option=-O2 ;;
*) optimize_option=-O3 ;;
esac ;;
*) optimize_option="$withval" ;;
esac
AC_SUBST(OPTIMIZE_OPTION,$optimize_option)
AC_MSG_RESULT([$optimize_option])
dnl Specify extra build options
AC_ARG_WITH(extra-options,
AS_HELP_STRING([--with-extra-options],
[Specify additional options to compile LLVM with]),,
withval=default)
case "$withval" in
default) EXTRA_OPTIONS= ;;
*) EXTRA_OPTIONS=$withval ;;
esac
AC_SUBST(EXTRA_OPTIONS,$EXTRA_OPTIONS)
dnl Specify extra linker build options
AC_ARG_WITH(extra-ld-options,
AS_HELP_STRING([--with-extra-ld-options],
[Specify additional options to link LLVM with]),,
withval=default)
case "$withval" in
default) EXTRA_LD_OPTIONS= ;;
*) EXTRA_LD_OPTIONS=$withval ;;
esac
AC_SUBST(EXTRA_LD_OPTIONS,$EXTRA_LD_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
AC_ARG_WITH(clang-srcdir,
AS_HELP_STRING([--with-clang-srcdir],
[Directory to the out-of-tree Clang source]),,
withval="-")
case "$withval" in
-) clang_src_root="" ;;
/* | [[A-Za-z]]:[[\\/]]*) clang_src_root="$withval" ;;
*) clang_src_root="$ac_pwd/$withval" ;;
esac
AC_SUBST(CLANG_SRC_ROOT,[$clang_src_root])
AC_ARG_WITH(clang-resource-dir,
AS_HELP_STRING([--with-clang-resource-dir],
[Relative directory from the Clang binary for resource files]),,
withval="")
AC_DEFINE_UNQUOTED(CLANG_RESOURCE_DIR,"$withval",
[Relative directory for resource files])
AC_ARG_WITH(c-include-dirs,
AS_HELP_STRING([--with-c-include-dirs],
[Colon separated list of directories clang will search for headers]),,
withval="")
AC_DEFINE_UNQUOTED(C_INCLUDE_DIRS,"$withval",
[Directories clang will search for headers])
# Clang normally uses the system c++ headers and libraries. With this option,
# clang will use the ones provided by a gcc installation instead. This option should
# be passed the same value that was used with --prefix when configuring gcc.
AC_ARG_WITH(gcc-toolchain,
AS_HELP_STRING([--with-gcc-toolchain],
[Directory where gcc is installed.]),,
withval="")
AC_DEFINE_UNQUOTED(GCC_INSTALL_PREFIX,"$withval",
[Directory where gcc is installed.])
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 Specify the URL where bug reports should be submitted.
AC_ARG_WITH(bug-report-url,
AS_HELP_STRING([--with-bug-report-url],
[Specify the URL where bug reports should be submitted (default=http://llvm.org/bugs/)]),,
withval="http://llvm.org/bugs/")
AC_DEFINE_UNQUOTED(BUG_REPORT_URL,"$withval",
[Bug report URL.])
dnl --enable-libffi : check whether the user wants to turn off libffi:
AC_ARG_ENABLE(libffi,AS_HELP_STRING(
--enable-libffi,[Check for the presence of libffi (default is NO)]),
[case "$enableval" in
yes) llvm_cv_enable_libffi="yes" ;;
no) llvm_cv_enable_libffi="no" ;;
*) AC_MSG_ERROR([Invalid setting for --enable-libffi. Use "yes" or "no"]) ;;
esac],
llvm_cv_enable_libffi=no)
AC_ARG_WITH(internal-prefix,
AS_HELP_STRING([--with-internal-prefix],
[Installation directory for internal files]),,
withval="")
AC_SUBST(INTERNAL_PREFIX,[$withval])
dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 4: Check for programs we need and that they are the right version
dnl===
dnl===-----------------------------------------------------------------------===
AC_PROG_NM
AC_SUBST(NM)
dnl Check for the tools that the makefiles require
AC_CHECK_GNU_MAKE
AC_PROG_LN_S
AC_PATH_PROG(CMP, [cmp], [cmp])
AC_PATH_PROG(CP, [cp], [cp])
AC_PATH_PROG(DATE, [date], [date])
AC_PATH_PROG(FIND, [find], [find])
AC_PATH_PROG(GREP, [grep], [grep])
AC_PATH_PROG(MKDIR,[mkdir],[mkdir])
AC_PATH_PROG(MV, [mv], [mv])
AC_PROG_RANLIB
AC_CHECK_TOOL(AR, ar, false)
AC_PATH_PROG(RM, [rm], [rm])
AC_PATH_PROG(SED, [sed], [sed])
AC_PATH_PROG(TAR, [tar], [gtar])
AC_PATH_PROG(BINPWD,[pwd], [pwd])
dnl Looking for misc. graph plotting software
AC_PATH_PROG(GRAPHVIZ, [Graphviz], [echo Graphviz])
if test "$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_PROG(FDP, [fdp], [echo fdp])
if test "$FDP" != "echo fdp" ; then
AC_DEFINE([HAVE_FDP],[1],[Define if the neat program is available])
dnl If we're targeting for mingw we should emit windows paths, not msys
if test "$llvm_cv_os_type" = "MingW" ; then
FDP=`echo $FDP | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
fi
AC_DEFINE_UNQUOTED([LLVM_PATH_FDP],"$FDP${EXEEXT}",
[Define to path to fdp program if found or 'echo fdp' otherwise])
fi
AC_PATH_PROG(NEATO, [neato], [echo neato])
if test "$NEATO" != "echo neato" ; then
AC_DEFINE([HAVE_NEATO],[1],[Define if the neat program is available])
dnl If we're targeting for mingw we should emit windows paths, not msys
if test "$llvm_cv_os_type" = "MingW" ; then
NEATO=`echo $NEATO | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
fi
AC_DEFINE_UNQUOTED([LLVM_PATH_NEATO],"$NEATO${EXEEXT}",
[Define to path to neato program if found or 'echo neato' otherwise])
fi
AC_PATH_PROG(TWOPI, [twopi], [echo twopi])
if test "$TWOPI" != "echo twopi" ; then
AC_DEFINE([HAVE_TWOPI],[1],[Define if the neat program is available])
dnl If we're targeting for mingw we should emit windows paths, not msys
if test "$llvm_cv_os_type" = "MingW" ; then
TWOPI=`echo $TWOPI | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
fi
AC_DEFINE_UNQUOTED([LLVM_PATH_TWOPI],"$TWOPI${EXEEXT}",
[Define to path to twopi program if found or 'echo twopi' otherwise])
fi
AC_PATH_PROG(CIRCO, [circo], [echo circo])
if test "$CIRCO" != "echo circo" ; then
AC_DEFINE([HAVE_CIRCO],[1],[Define if the neat program is available])
dnl If we're targeting for mingw we should emit windows paths, not msys
if test "$llvm_cv_os_type" = "MingW" ; then
CIRCO=`echo $CIRCO | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
fi
AC_DEFINE_UNQUOTED([LLVM_PATH_CIRCO],"$CIRCO${EXEEXT}",
[Define to path to circo program if found or 'echo circo' 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
AC_PATH_PROG(XDOT_PY, [xdot.py], [echo xdot.py])
if test "$XDOT_PY" != "echo xdot.py" ; then
AC_DEFINE([HAVE_XDOT_PY],[1],[Define if the xdot.py program is available])
dnl If we're targeting for mingw we should emit windows paths, not msys