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CMake/Templates/configure.in

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# Process this file with autoconf to produce a configure script.
AC_INIT()
CMAKE_CONFIG_DIR=`pwd`
AC_SUBST(CMAKE_CONFIG_DIR)
#
# check for some programs we use
#
AC_PROG_CC
AC_PROG_CXX
AC_PROG_RANLIB
AC_PROG_INSTALL
# check for X11 support
AC_PATH_XTRA
CMAKE_HAS_X=0
if test "$no_x"a = a; then
CMAKE_HAS_X=1
fi
AC_SUBST(CMAKE_HAS_X)
# get byte swapping info
AC_C_BIGENDIAN
if test $ac_cv_c_bigendian = yes; then
CMAKE_WORDS_BIGENDIAN=1
fi
AC_SUBST(CMAKE_WORDS_BIGENDIAN)
# some stuff Tcl uses
#
AC_CHECK_HEADER(limits.h, HAVE_LIMITS_H=-DHAVE_LIMITS_H,HAVE_LIMITS_H="")
AC_SUBST(CMAKE_HAVE_LIMITS_H)
AC_HAVE_HEADERS(unistd.h, HAVE_UNISTD_H=-DHAVE_UNISTD_H,HAVE_UNISTD_H="")
AC_SUBST(CMAKE_HAVE_UNISTD_H)
# Step 1: set the variable "system" to hold the name and version number
# for the system. This can usually be done via the "uname" command, but
# there are a few systems, like Next, where this doesn't work.
AC_MSG_CHECKING([system version (for dynamic loading)])
if test -f /usr/lib/NextStep/software_version; then
system=NEXTSTEP-`awk '/3/,/3/' /usr/lib/NextStep/software_version`
else
system=`uname -s`-`uname -r`
if test "$?" -ne 0 ; then
AC_MSG_RESULT([unknown (can't find uname command)])
system=unknown
else
# Special check for weird MP-RAS system (uname returns weird
# results, and the version is kept in special file).
if test -r /etc/.relid -a "X`uname -n`" = "X`uname -s`" ; then
system=MP-RAS-`awk '{print $3}' /etc/.relid'`
fi
AC_MSG_RESULT($system)
fi
fi
#
# use shared libs
#
CMAKE_shared_ok="yes"
# the following is an excerpt from the tcl7.5b2 configure.in
#--------------------------------------------------------------------
# The statements below define a collection of symbols related to
# dynamic loading and shared libraries:
#
# CMAKE_SHLIB_CFLAGS - Flags to pass to cc when compiling the components
# of a shared library (may request position-independent
# code, among other things).
# CMAKE_SHLIB_LD_LIBS - Dependent libraries for the linker to scan when
# creating shared libraries. This symbol typically
# goes at the end of the "ld" commands that build
# shared libraries. The value of the symbol if
# "${LIBS}" if all of the dependent libraries should
# be specified when creating a shared library. If
# dependent libraries should not be specified (as on
# SunOS 4.x, where they cause the link to fail, or in
# general if Tcl and Tk aren't themselves shared
# libraries), then this symbol has an empty string
# as its value.
# CMAKE_SHLIB_SUFFIX - Suffix to use for the name of the shared library. An
# empty string means we don't know how to use shared
# libraries on this platform.
# CMAKE_SHLIB_BUILD_FLAGS -
# Flags to use when building a shared library.
# CMAKE_SHLIB_LINK_FLAGS -
# Flags to pass to the compiler when linking object
# files into an executable application binary such
# as tclsh.
# CMAKE_SHLIB_RUNTIME_FLAG -
# Flag used to specify the runtime directories (e.g. "-R" or
# "-Wl,-rpath,"). If null, no attempt is make to specify the
# runtime paths.
# CMAKE_SHLIB_RUNTIME_SEP -
# If null, then each path is a separate argument. If not null,
# then all the directories are joined together, separated by
# $(CMAKE_SHLIB_RUNTIME_SEP) and appended to
# $(CMAKE_SHLIB_RUNTIME_FLAG). When not null, this is
# typically a colon ":".
#--------------------------------------------------------------------
# Step 2: check for existence of -ldl library. This is needed because
# Linux can use either -ldl or -ldld for dynamic loading.
AC_CHECK_LIB(dl, dlopen, have_dl=yes, have_dl=no)
# Step 4: set configuration options based on system name and version.
fullSrcDir=`cd $srcdir; pwd`
AC_SUBST(fullSrcDir)
case $system in
AIX-*)
# AIX: can't link shared library extensions unless Tcl and Tk are
# also shared libraries.
CMAKE_SHLIB_CFLAGS=""
CMAKE_SHLIB_LD_LIBS='${LIBS}'
CMAKE_SHLIB_SUFFIX="..o"
CMAKE_DL_LIBS=""
AC_CHECK_LIB(ld,printf, CMAKE_DL_LIBS="-lld")
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
HP-UX-*.08.*|HP-UX-*.09.*|HP-UX-*.10.*)
CMAKE_SHLIB_CFLAGS="+z"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".sl"
CMAKE_DL_LIBS="-ldld"
CMAKE_SHLIB_BUILD_FLAGS='+Z -Wl,-E -b'
CMAKE_SHLIB_LINK_FLAGS='-Wl,+s'
CMAKE_SHLIB_RUNTIME_FLAG='-Wl,+b,'
CMAKE_SHLIB_RUNTIME_SEP=':'
if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
CMAKE_SHLIB_BUILD_FLAGS='-shared -Wl,-E -Wl,-b'
CMAKE_SHLIB_LINK_FLAGS='-Wl,+s'
CMAKE_SHLIB_RUNTIME_FLAG='-Wl,+b,'
CMAKE_SHLIB_RUNTIME_SEP=':'
fi
;;
IRIX-5.*)
CMAKE_SHLIB_CFLAGS=""
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_BUILD_FLAGS="-shared -rdata_shared"
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-rpath,"
CMAKE_SHLIB_RUNTIME_SEP=":"
;;
IRIX-6* | IRIX64-6* | IRIX-64-6*)
CMAKE_SHLIB_CFLAGS=""
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_BUILD_FLAGS="-shared -rdata_shared"
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-rpath,"
CMAKE_SHLIB_RUNTIME_SEP=":"
;;
Linux*)
CMAKE_SHLIB_CFLAGS="-fPIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_SHLIB_BUILD_FLAGS="-shared"
if test "$have_dl" = yes; then
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_LINK_FLAGS="-rdynamic"
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-rpath,"
CMAKE_SHLIB_RUNTIME_SEP=":"
else
AC_CHECK_HEADER(dld.h, [
CMAKE_DL_LIBS="-ldld"
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-rpath,"
CMAKE_SHLIB_RUNTIME_SEP=""])
fi
;;
CYGWIN_NT*)
CMAKE_SHLIB_CFLAGS=""
CMAKE_DL_LIBS="-lgdi32"
CMAKE_SHLIB_BUILD_FLAGS="-shared"
CMAKE_SHLIB_SUFFIX=".dll"
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
MP-RAS-02*)
CMAKE_SHLIB_CFLAGS="-K PIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
MP-RAS-*)
CMAKE_SHLIB_CFLAGS="-K PIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_LINK_FLAGS="-Wl,-Bexport"
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
NetBSD-*|FreeBSD-*)
# Not available on all versions: check for include file.
if test -f /usr/include/dlfcn.h; then
CMAKE_SHLIB_CFLAGS="-fPIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_BUILD_FLAGS="-shared"
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-rpath,"
CMAKE_SHLIB_RUNTIME_SEP=":"
else
CMAKE_SHLIB_CFLAGS=""
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX="..o"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
fi
;;
NEXTSTEP-*)
CMAKE_SHLIB_CFLAGS=""
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
OSF1-1.[012])
# OSF/1 1.[012] from OSF, and derivatives, including Paragon OSF/1
CMAKE_SHLIB_CFLAGS=""
# Hack: make package name same as library name
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
OSF1-1.*)
# OSF/1 1.3 from OSF using ELF, and derivatives, including AD2
CMAKE_SHLIB_CFLAGS="-fpic"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
OSF1-V*)
# Digital OSF/1
CMAKE_SHLIB_CFLAGS=""
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_BUILD_FLAGS='-shared -Wl,-expect_unresolved,\\*'
CMAKE_SHLIB_LINK_FLAGS=''
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-rpath,"
CMAKE_SHLIB_RUNTIME_SEP=":"
;;
RISCos-*)
CMAKE_SHLIB_CFLAGS="-G 0"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX="..o"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS="-Wl,-D,08000000"
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
SCO_SV-3.2*)
# Note, dlopen is available only on SCO 3.2.5 and greater. However,
# this test works, since "uname -s" was non-standard in 3.2.4 and
# below.
CMAKE_SHLIB_CFLAGS="-Kpic -belf"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS="-belf -Wl,-Bexport"
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
SINIX*5.4*)
CMAKE_SHLIB_CFLAGS="-K PIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_LINK_FLAGS=""
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
SunOS-4*)
CMAKE_SHLIB_CFLAGS="-PIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_BUILD_FLAGS='-shared -Wl,-r -nostdlib'
CMAKE_SHLIB_LINK_FLAGS=''
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-R,"
CMAKE_SHLIB_RUNTIME_SEP=":"
;;
SunOS-5*)
CMAKE_SHLIB_CFLAGS="-KPIC"
CMAKE_SHLIB_LD_LIBS='${LIBS}'
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_BUILD_FLAGS='-G'
CMAKE_SHLIB_LINK_FLAGS=''
CMAKE_SHLIB_RUNTIME_FLAG="-R "
CMAKE_SHLIB_RUNTIME_SEP=":"
if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
CMAKE_SHLIB_BUILD_FLAGS='-Wl,-G'
CMAKE_SHLIB_LINK_FLAGS=''
CMAKE_SHLIB_RUNTIME_FLAG="-Wl,-R,"
CMAKE_SHLIB_RUNTIME_SEP=":"
fi
;;
ULTRIX-4.*)
CMAKE_SHLIB_CFLAGS="-G 0"
CMAKE_SHLIB_SUFFIX="..o"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_DL_LIBS=""
CMAKE_SHLIB_LINK_FLAGS="-Wl,-D,08000000"
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
UNIX_SV*)
CMAKE_SHLIB_CFLAGS="-K PIC"
CMAKE_SHLIB_LD_LIBS=""
CMAKE_SHLIB_SUFFIX=".so"
CMAKE_DL_LIBS="-ldl"
CMAKE_SHLIB_LINK_FLAGS="-Wl,-Bexport"
CMAKE_SHLIB_RUNTIME_FLAG=""
CMAKE_SHLIB_RUNTIME_SEP=""
;;
esac
export CMAKE_SHLIB_SUFFIX
# If we're running gcc, then change the C flags for compiling shared
# libraries to the right flags for gcc, instead of those for the
# standard manufacturer compiler.
if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
CMAKE_SHLIB_CFLAGS="-fPIC"
fi
# if running on cygwin remove -fPIC flag
case $system in
CYGWIN_NT*)
CMAKE_SHLIB_CFLAGS=""
;;
esac
# If the user has supplied C flags for compiling shared objects, use
# those instead
if test "${SHLIB_CFLAGS}" != ""; then
CMAKE_SHLIB_CFLAGS="${SHLIB_CFLAGS}"
fi
CMAKE_LD_SEARCH_FLAGS="${LD_SEARCH_FLAGS}"
AC_SUBST(CMAKE_SHLIB_LINK_FLAGS)
AC_SUBST(CMAKE_SHLIB_BUILD_FLAGS)
AC_SUBST(CMAKE_SHLIB_CFLAGS)
AC_SUBST(CMAKE_LIB_EXT)
AC_SUBST(CMAKE_DL_LIBS)
AC_SUBST(CMAKE_SHLIB_LD_LIBS)
AC_SUBST(CMAKE_SHLIB_SUFFIX)
AC_SUBST(CMAKE_SHLIB_RUNTIME_FLAG)
AC_SUBST(CMAKE_SHLIB_RUNTIME_SEP)
##########################
## ##
## Check thread support ##
## ##
##########################
# initialize thread vars
CMAKE_THREAD_LIBS=""
use_sproc=no
CMAKE_USE_SPROC=0
CMAKE_USE_PTHREADS=0
CMAKE_HP_PTHREADS=0
##########################
## ##
## sproc ##
## ##
##########################
# check for sproc
force_sproc=no
AC_ARG_WITH(sproc,
[ --with-sproc use sproc instead of pthreads if possible],
if test "$withval" = yes; then
force_sproc=yes
fi,)
AC_CHECK_HEADERS(sys/prctl.h, [use_sproc=yes])
if test "$use_sproc" = "yes"; then
case $system in
Linux* | IRIX64-6.5 | IRIX-6.5)
if test "$force_sproc" = "yes"; then
CMAKE_USE_SPROC=1
else
use_sproc=no
fi
;;
IRIX*)
CMAKE_USE_SPROC=1
;;
esac
fi
use_pthreads=no
AC_CHECK_HEADERS(pthread.h, [use_pthreads=yes])
if test "$use_pthreads" = "yes"; then
if test "$use_sproc" = "no"; then
AC_CHECK_LIB(pthreads, pthread_create, CMAKE_THREAD_LIBS="-lpthreads")
AC_CHECK_LIB(pthread, pthread_create, CMAKE_THREAD_LIBS="-lpthread")
# Work around Solaris 5.6 and 5.7 bug:
if test "`uname -s -r`" = "SunOS 5.6"; then
AC_CHECK_LIB(thread, thr_create, CMAKE_THREAD_LIBS="$CMAKE_THREAD_LIBS -lthread")
fi
if test "`uname -s -r`" = "SunOS 5.7"; then
AC_CHECK_LIB(thread, thr_create, CMAKE_THREAD_LIBS="$CMAKE_THREAD_LIBS -lthread")
fi
CMAKE_USE_PTHREADS=1
fi
fi
# on an HP with pthread we need to use -lcma
# on dec alphas we have had problems as well
if test "$use_pthreads" = "yes"; then
case $system in
HP-UX-*.10.*)
CMAKE_THREAD_LIBS="-lcma"
CMAKE_USE_PTHREADS=1
CMAKE_HP_PTHREADS=1
;;
OSF1-V*)
CMAKE_USE_PTHREADS=0
CMAKE_THREAD_LIBS=""
;;
FreeBSD*)
CMAKE_USE_PTHREADS=0
CMAKE_THREAD_LIBS=""
;;
CYGWIN_NT*)
CMAKE_THREAD_LIBS=""
CMAKE_USE_WIN32_THREADS=0
CMAKE_USE_PTHREADS=1
;;
esac
fi
AC_SUBST(CMAKE_USE_SPROC)
AC_SUBST(CMAKE_USE_PTHREADS)
AC_SUBST(CMAKE_USE_WIN32_THREADS)
AC_SUBST(CMAKE_HP_PTHREADS)
AC_SUBST(CMAKE_THREAD_LIBS)
CMAKE_ANSI_CFLAGS=""
# on hp use -Aa for ansi
if test $ac_cv_prog_gxx = no; then
case $system in
HP-UX-*.08.*|HP-UX-*.09.*|HP-UX-*.10.*)
echo $ac_n "checking whether ${CC} accepts -Aa""... $ac_c" 1>&6
echo 'void f(){}' > conftest.c
if test -z "`${CC} -Aa -c conftest.c 2>&1`"; then
echo "$ac_t""yes" 1>&6
CMAKE_ANSI_CFLAGS="-Aa"
else
echo "$ac_t""no" 1>&6
fi
rm -f conftest*
;;
esac
fi
AC_SUBST(CMAKE_ANSI_CFLAGS)
# if we are not running g++ then we might need some other flags
# to get the templates compiled correctly
CMAKE_TEMPLATE_FLAGS=""
if test $ac_cv_prog_gxx = no; then
echo $ac_n "checking whether ${CXX} accepts -ptused -no_prelink""... $ac_c" 1>&6
echo 'void f(){}' > conftest.cc
if test -z "`${CXX} -ptused -no_prelink -c conftest.cc 2>&1`"; then
echo "$ac_t""yes" 1>&6
CMAKE_TEMPLATE_FLAGS="-ptused -no_prelink"
else
echo "$ac_t""no" 1>&6
fi
rm -f conftest*
fi
AC_SUBST(CMAKE_TEMPLATE_FLAGS)
# check no g++ compilers to see if they have the standard
# ansi stream files (without the .h)
if test $ac_cv_prog_gxx = no; then
AC_MSG_CHECKING( ansi standard C++ stream headers )
rm -rf conftest.*
cat > conftest.cc <<!
#include <iostream>
!
if test -z "`${CXX} $CXXFLAGS $CPPFLAGS -c conftest.cc 2>&1`"; then
echo "$ac_t""yes" 1>&6
else
CMAKE_NO_ANSI_STREAM_HEADERS="1"
echo "$ac_t""no" 1>&6
fi
fi
AC_SUBST(CMAKE_NO_ANSI_STREAM_HEADERS)
# check to see if stl is in the std namespace
if test $ac_cv_prog_gxx = no; then
AC_MSG_CHECKING( ansi standard namespace support )
rm -rf conftest.*
cat > conftest.cc <<!
#include <list>
void foo() { std::list<int> l; }
!
if test -z "`${CXX} $CXXFLAGS $CPPFLAGS -c conftest.cc 2>&1`"; then
echo "$ac_t""yes" 1>&6
else
CMAKE_NO_STD_NAMESPACE="1"
echo "$ac_t""no" 1>&6
fi
fi
AC_SUBST(CMAKE_NO_STD_NAMESPACE)
# check to see if for scoping is supported
if test $ac_cv_prog_gxx = no; then
AC_MSG_CHECKING( ansi for scope support )
rm -rf conftest.*
cat > conftest.cc <<!
void foo() { for(int i;;); for(int i;;); }
!
if test -z "`${CXX} $CXXFLAGS $CPPFLAGS -c conftest.cc 2>&1`"; then
echo "$ac_t""yes" 1>&6
else
CMAKE_NO_ANSI_FOR_SCOPE="1"
echo "$ac_t""no" 1>&6
fi
fi
AC_SUBST(CMAKE_NO_ANSI_FOR_SCOPE)
if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
SHLIB_CFLAGS="-fPIC"
fi
# find make to use to build cmake, prefer gmake
AC_PATH_PROGS(RUNMAKE, gmake make)
AC_PATH_PROGS(CMAKE_AR_TMP, ar)
CMAKE_AR="$CMAKE_AR_TMP"
CMAKE_AR_ARGS="cr"
# if on SunOS and not using gXX then use the compiler to make .a libs
case $system in
SunOS-5*)
if test $ac_cv_prog_gxx = yes; then
:
else
echo "Using $CXX -xar -o for creating .a libraries"
CMAKE_AR="$CXX"
CMAKE_AR_ARGS="-xar -o"
fi
esac
AC_SUBST(CMAKE_AR)
AC_SUBST(CMAKE_AR_ARGS)
CMAKE_COMPILER_IS_GNUGXX=0
if test $ac_cv_prog_gxx = yes; then
CMAKE_COMPILER_IS_GNUCXX=1
fi
AC_SUBST(CMAKE_COMPILER_IS_GNUCXX)
# generate output files.
# create mkdir files just to make some of the directories
AC_OUTPUT( CMakeSystemConfig.cmake )
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