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