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dnl
dnl
dnl compilelinkrun.m4 - used to check whether a required package is properly
dnl installed. Compiles, links and runs a c++ test program that uses the
dnl package to verify that the package is properly installed
dnl
dnl Expected arguments:
dnl $1: the name of the package we are testing, e.g. "OpenEXR"
dnl used for informational messages, warnings & errors
dnl
dnl $2: the argument passed to configure specifying how to disable this test
dnl for example:
dnl $3 = "openexrtest" and
dnl "configure --disable-openexrtest" will skip the test
dnl
dnl $3: CXXFLAGS used by the test
dnl
dnl $4: LDFLAGS used by the test
dnl
dnl $5: include section of sourcecode for a c++ test program
dnl $6: body section of sourcecode for a c++ test program
dnl The test program should make use of a library that is supposed to
dnl be tested.
dnl
dnl $7: the action to be perfomed if the test succeeds
dnl (e.g. AC_MSG_RESULT("OpenEXR test program succeeded"))
dnl
dnl $8 the action to be perfomed if the test fails
dnl (e.g. AC_MSG_ERROR("OpenEXR test program failed"))
dnl
AC_DEFUN([AM_COMPILELINKRUN],
[
dnl create some local m4 "variables" so that we don't have to use numbers
define([arg_pkg_name],$1)
define([arg_disable],$2)
define([arg_cxxflags],$3)
define([arg_ldflags],$4)
define([arg_libs],$5)
define([arg_include_source],$6)
define([arg_body_source],$7)
define([arg_do_yes],$8)
define([arg_do_no],$9)
dnl check arguments
AC_ARG_ENABLE(arg_disable, [ --disable-arg_disable Do not try to compile and run a test arg_pkg_name program],, enable_programtest=yes)
dnl
dnl if the test hasn't been disabled, then compile, link and run test program
dnl
if test "x$enable_programtest" = "xyes" ; then
dnl basic preliminary checks
AC_MSG_CHECKING(for arg_pkg_name)
test_runs="yes"
dnl save settings and setup c++ before we start
ac_save_CXXFLAGS="$CXXFLAGS"
ac_save_LDFLAGS="$LDFLAGS"
ac_save_LIBS="$LIBS"
CXXFLAGS="$CXXFLAGS arg_cxxflags"
LDFLAGS="$LDFLAGS arg_ldflags"
LIBS="$LIBS arg_libs"
AC_REQUIRE_CPP()
AC_LANG_PUSH([C++])
rm -f conf.testprogram
dnl
dnl first try a complete test - compile, link run
dnl
AC_RUN_IFELSE([AC_LANG_PROGRAM(arg_include_source,
arg_body_source; [[system("touch conf.testprogram"); ]])],
test_runs=yes,
test_runs=no,
[echo $ac_n "cross compiling; assumed OK... $ac_c"])
if test "x$test_runs" = "xyes" || test -f conf.testprogram ; then
AC_MSG_RESULT(yes)
ifelse([arg_do_yes], , :, [arg_do_yes])
else
AC_MSG_RESULT(no)
echo "*** Could not run the arg_pkg_name test program, checking why..."
test_compiles="yes"
test_links="yes"
dnl
dnl if the program did not run, attempt to compile only
dnl
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(arg_include_source,
arg_body_source ; )],
test_compiles=yes,
test_compiles=no)
if test "x$test_compiles" = "xno" ; then
echo "*** The test program could not be compiled. Is arg_pkg_name installed?"
echo "*** Check that the cflags (below) includes the arg_pkg_name include directory"
else
dnl
dnl if the program did compile, try linking
dnl
AC_LINK_IFELSE([AC_LANG_PROGRAM(arg_include_source,
arg_body_source ; )],
test_links=yes,
test_links=no)
if test "x$test_links" = "xyes"; then
echo "*** The test program compiled and staticly linked, but did not run. This "
echo "*** usually means that the run-time linker is not finding arg_pkg_name or finding"
echo "*** the wrong version of arg_pkg_name."
echo "***"
echo "*** If the linker is not finding arg_pkg_name, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system."
else
echo "*** The arg_pkg_name test program could be compiled, but could not be dynamically."
echo "*** or statically linked."
echo "***"
echo "*** Make sure the LDFLAGS points to the location of the arg_pkg_name library."
echo "*** (e.g. -L/usr/local/lib)."
echo "*** If the run-time linker is not finding arg_pkg_name, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system."
fi
fi
dnl
dnl The test failed for some reason. Print out more info,
dnl unset flags and signal an error.
dnl
echo "***"
echo "*** Flags used by the test:"
echo "*** cflags: $CXXFLAGS "
echo "*** ldflags: $LDFLAGS"
echo "***"
echo "*** You can also run configure with --disable-arg_disable to skip this test."
ifelse([arg_do_no], , :, [arg_do_no])
fi
AC_LANG_POP([C++])
CXXFLAGS="$ac_save_CXXFLAGS"
LDFLAGS="$ac_save_LDFLAGS"
LIBS="$ac_save_LIBS"
dnl
dnl clean up
dnl
rm -f conf.testprogram
fi
dnl clean up local "variables"
undefine([arg_pkg_name])
undefine([arg_disable])
undefine([arg_cxxflags])
undefine([arg_ldflags])
undefine([arg_libs])
undefine([arg_include_source])
undefine([arg_body_source])
undefine([arg_do_yes])
undefine([arg_do_no])
])
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