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 #!/bin/sh
 
 # These variables are automatically filled in by the configure script.
 name="@PACKAGE_TARNAME@"
 version="@PACKAGE_VERSION@"
 
 show_usage()
 {
   echo "Usage: gmock-config [OPTIONS...]"
 }
 
 show_help()
 {
   show_usage
   cat <<\EOF
 
 The `gmock-config' script provides access to the necessary compile and linking
 flags to connect with Google C++ Mocking Framework, both in a build prior to
 installation, and on the system proper after installation. The installation
 overrides may be issued in combination with any other queries, but will only
 affect installation queries if called on a built but not installed gmock. The
 installation queries may not be issued with any other types of queries, and
 only one installation query may be made at a time. The version queries and
 compiler flag queries may be combined as desired but not mixed. Different
 version queries are always combined with logical "and" semantics, and only the
 last of any particular query is used while all previous ones ignored. All
 versions must be specified as a sequence of numbers separated by periods.
 Compiler flag queries output the union of the sets of flags when combined.
 
  Examples:
   gmock-config --min-version=1.0 || echo "Insufficient Google Mock version."
 
   g++ $(gmock-config --cppflags --cxxflags) -o foo.o -c foo.cpp
   g++ $(gmock-config --ldflags --libs) -o foo foo.o
 
   # When using a built but not installed Google Mock:
   g++ $(../../my_gmock_build/scripts/gmock-config ...) ...
 
   # When using an installed Google Mock, but with installation overrides:
   export GMOCK_PREFIX="/opt"
   g++ $(gmock-config --libdir="/opt/lib64" ...) ...
 
  Help:
   --usage                    brief usage information
   --help                     display this help message
 
  Installation Overrides:
   --prefix=<dir>             overrides the installation prefix
   --exec-prefix=<dir>        overrides the executable installation prefix
   --libdir=<dir>             overrides the library installation prefix
   --includedir=<dir>         overrides the header file installation prefix
 
  Installation Queries:
   --prefix                   installation prefix
   --exec-prefix              executable installation prefix
   --libdir                   library installation directory
   --includedir               header file installation directory
   --version                  the version of the Google Mock installation
 
  Version Queries:
   --min-version=VERSION      return 0 if the version is at least VERSION
   --exact-version=VERSION    return 0 if the version is exactly VERSION
   --max-version=VERSION      return 0 if the version is at most VERSION
 
  Compilation Flag Queries:
   --cppflags                 compile flags specific to the C-like preprocessors
   --cxxflags                 compile flags appropriate for C++ programs
   --ldflags                  linker flags
   --libs                     libraries for linking
 
 EOF
 }
 
 # This function bounds our version with a min and a max. It uses some clever
 # POSIX-compliant variable expansion to portably do all the work in the shell
 # and avoid any dependency on a particular "sed" or "awk" implementation.
 # Notable is that it will only ever compare the first 3 components of versions.
 # Further components will be cleanly stripped off. All versions must be
 # unadorned, so "v1.0" will *not* work. The minimum version must be in $1, and
 # the max in $2. TODO(chandlerc@google.com): If this ever breaks, we should
 # investigate expanding this via autom4te from AS_VERSION_COMPARE rather than
 # continuing to maintain our own shell version.
 check_versions()
 {
   major_version=${version%%.*}
   minor_version="0"
   point_version="0"
   if test "${version#*.}" != "${version}"; then
     minor_version=${version#*.}
     minor_version=${minor_version%%.*}
   fi
   if test "${version#*.*.}" != "${version}"; then
     point_version=${version#*.*.}
     point_version=${point_version%%.*}
   fi
 
   min_version="$1"
   min_major_version=${min_version%%.*}
   min_minor_version="0"
   min_point_version="0"
   if test "${min_version#*.}" != "${min_version}"; then
     min_minor_version=${min_version#*.}
     min_minor_version=${min_minor_version%%.*}
   fi
   if test "${min_version#*.*.}" != "${min_version}"; then
     min_point_version=${min_version#*.*.}
     min_point_version=${min_point_version%%.*}
   fi
 
   max_version="$2"
   max_major_version=${max_version%%.*}
   max_minor_version="0"
   max_point_version="0"
   if test "${max_version#*.}" != "${max_version}"; then
     max_minor_version=${max_version#*.}
     max_minor_version=${max_minor_version%%.*}
   fi
   if test "${max_version#*.*.}" != "${max_version}"; then
     max_point_version=${max_version#*.*.}
     max_point_version=${max_point_version%%.*}
   fi
 
   test $(($major_version)) -lt $(($min_major_version)) && exit 1
   if test $(($major_version)) -eq $(($min_major_version)); then
     test $(($minor_version)) -lt $(($min_minor_version)) && exit 1
     if test $(($minor_version)) -eq $(($min_minor_version)); then
       test $(($point_version)) -lt $(($min_point_version)) && exit 1
     fi
   fi
 
   test $(($major_version)) -gt $(($max_major_version)) && exit 1
   if test $(($major_version)) -eq $(($max_major_version)); then
     test $(($minor_version)) -gt $(($max_minor_version)) && exit 1
     if test $(($minor_version)) -eq $(($max_minor_version)); then
       test $(($point_version)) -gt $(($max_point_version)) && exit 1
     fi
   fi
 
   exit 0
 }
 
 # Show the usage line when no arguments are specified.
 if test $# -eq 0; then
   show_usage
   exit 1
 fi
 
 while test $# -gt 0; do
   case $1 in
     --usage)          show_usage;         exit 0;;
     --help)           show_help;          exit 0;;
 
     # Installation overrides
     --prefix=*)       GMOCK_PREFIX=${1#--prefix=};;
     --exec-prefix=*)  GMOCK_EXEC_PREFIX=${1#--exec-prefix=};;
     --libdir=*)       GMOCK_LIBDIR=${1#--libdir=};;
     --includedir=*)   GMOCK_INCLUDEDIR=${1#--includedir=};;
 
     # Installation queries
     --prefix|--exec-prefix|--libdir|--includedir|--version)
       if test -n "${do_query}"; then
         show_usage
         exit 1
       fi
       do_query=${1#--}
       ;;
 
     # Version checking
     --min-version=*)
       do_check_versions=yes
       min_version=${1#--min-version=}
       ;;
     --max-version=*)
       do_check_versions=yes
       max_version=${1#--max-version=}
       ;;
     --exact-version=*)
       do_check_versions=yes
       exact_version=${1#--exact-version=}
       ;;
 
     # Compiler flag output
     --cppflags)       echo_cppflags=yes;;
     --cxxflags)       echo_cxxflags=yes;;
     --ldflags)        echo_ldflags=yes;;
     --libs)           echo_libs=yes;;
 
     # Everything else is an error
     *)                show_usage;         exit 1;;
   esac
   shift
 done
 
 # These have defaults filled in by the configure script but can also be
 # overridden by environment variables or command line parameters.
 prefix="${GMOCK_PREFIX:-@prefix@}"
 exec_prefix="${GMOCK_EXEC_PREFIX:-@exec_prefix@}"
 libdir="${GMOCK_LIBDIR:-@libdir@}"
 includedir="${GMOCK_INCLUDEDIR:-@includedir@}"
 
 # We try and detect if our binary is not located at its installed location. If
 # it's not, we provide variables pointing to the source and build tree rather
 # than to the install tree. We also locate Google Test using the configured
 # gtest-config script rather than searching the PATH and our bindir for one.
 # This allows building against a just-built gmock rather than an installed
 # gmock.
 bindir="@bindir@"
 this_relative_bindir=`dirname $0`
 this_bindir=`cd ${this_relative_bindir}; pwd -P`
 if test "${this_bindir}" = "${this_bindir%${bindir}}"; then
   # The path to the script doesn't end in the bindir sequence from Autoconf,
   # assume that we are in a build tree.
   build_dir=`dirname ${this_bindir}`
   src_dir=`cd ${this_bindir}/@top_srcdir@; pwd -P`
 
   # TODO(chandlerc@google.com): This is a dangerous dependency on libtool, we
   # should work to remove it, and/or remove libtool altogether, replacing it
   # with direct references to the library and a link path.
   gmock_libs="${build_dir}/lib/libgmock.la"
   gmock_ldflags=""
 
   # We provide hooks to include from either the source or build dir, where the
   # build dir is always preferred. This will potentially allow us to write
   # build rules for generated headers and have them automatically be preferred
   # over provided versions.
   gmock_cppflags="-I${build_dir}/include -I${src_dir}/include"
   gmock_cxxflags=""
 
   # Directly invoke the gtest-config script used during the build process.
   gtest_config="@GTEST_CONFIG@"
 else
   # We're using an installed gmock, although it may be staged under some
   # prefix. Assume (as our own libraries do) that we can resolve the prefix,
   # and are present in the dynamic link paths.
   gmock_ldflags="-L${libdir}"
   gmock_libs="-l${name}"
   gmock_cppflags="-I${includedir}"
   gmock_cxxflags=""
 
   # We also prefer any gtest-config script installed in our prefix. Lacking
   # one, we look in the PATH for one.
   gtest_config="${bindir}/gtest-config"
   if test ! -x "${gtest_config}"; then
     gtest_config=`which gtest-config`
   fi
 fi
 
 # Ensure that we have located a Google Test to link against.
 if ! test -x "${gtest_config}"; then
   echo "Unable to locate Google Test, check your Google Mock configuration" \
        "and installation" >&2
   exit 1
 elif ! "${gtest_config}" "--exact-version=@GTEST_VERSION@"; then
   echo "The Google Test found is not the same version as Google Mock was " \
        "built against" >&2
   exit 1
 fi
 
 # Add the necessary Google Test bits into the various flag variables
 gmock_cppflags="${gmock_cppflags} `${gtest_config} --cppflags`"
 gmock_cxxflags="${gmock_cxxflags} `${gtest_config} --cxxflags`"
 gmock_ldflags="${gmock_ldflags} `${gtest_config} --ldflags`"
 gmock_libs="${gmock_libs} `${gtest_config} --libs`"
 
 # Do an installation query if requested.
 if test -n "$do_query"; then
   case $do_query in
     prefix)           echo $prefix;       exit 0;;
     exec-prefix)      echo $exec_prefix;  exit 0;;
     libdir)           echo $libdir;       exit 0;;
     includedir)       echo $includedir;   exit 0;;
     version)          echo $version;      exit 0;;
     *)                show_usage;         exit 1;;
   esac
 fi
 
 # Do a version check if requested.
 if test "$do_check_versions" = "yes"; then
   # Make sure we didn't receive a bad combination of parameters.
   test "$echo_cppflags" = "yes" && show_usage && exit 1
   test "$echo_cxxflags" = "yes" && show_usage && exit 1
   test "$echo_ldflags" = "yes"  && show_usage && exit 1
   test "$echo_libs" = "yes"     && show_usage && exit 1
 
   if test "$exact_version" != ""; then
     check_versions $exact_version $exact_version
     # unreachable
   else
     check_versions ${min_version:-0.0.0} ${max_version:-9999.9999.9999}
     # unreachable
   fi
 fi
 
 # Do the output in the correct order so that these can be used in-line of
 # a compiler invocation.
 output=""
 test "$echo_cppflags" = "yes" && output="$output $gmock_cppflags"
 test "$echo_cxxflags" = "yes" && output="$output $gmock_cxxflags"
 test "$echo_ldflags" = "yes"  && output="$output $gmock_ldflags"
 test "$echo_libs" = "yes"     && output="$output $gmock_libs"
 echo $output
 
 exit 0

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