dnl -*- Autoconf -*- dnl dnl Copyright © 2010-2020 Inria. All rights reserved. dnl Copyright © 2009, 2011 Université Bordeaux dnl Copyright © 2004-2005 The Trustees of Indiana University and Indiana dnl University Research and Technology dnl Corporation. All rights reserved. dnl Copyright © 2004-2005 The Regents of the University of California. dnl All rights reserved. dnl Copyright © 2004-2008 High Performance Computing Center Stuttgart, dnl University of Stuttgart. All rights reserved. dnl Copyright © 2006-2014 Cisco Systems, Inc. All rights reserved. dnl dnl See COPYING in top-level directory. #----------------------------------------------------------------------- # Probably only ever invoked by hwloc's configure.ac AC_DEFUN([HWLOC_BUILD_STANDALONE],[ hwloc_mode=standalone ])dnl #----------------------------------------------------------------------- # Probably only ever invoked by hwloc's configure.ac AC_DEFUN([HWLOC_DEFINE_ARGS],[ # Embedded mode, or standalone? AC_ARG_ENABLE([embedded-mode], AC_HELP_STRING([--enable-embedded-mode], [Using --enable-embedded-mode puts the HWLOC into "embedded" mode. The default is --disable-embedded-mode, meaning that the HWLOC is in "standalone" mode.])) # Change the symbol prefix? AC_ARG_WITH([hwloc-symbol-prefix], AC_HELP_STRING([--with-hwloc-symbol-prefix=STRING], [STRING can be any valid C symbol name. It will be prefixed to all public HWLOC symbols. Default: "hwloc_"])) # Debug mode? AC_ARG_ENABLE([debug], AC_HELP_STRING([--enable-debug], [Using --enable-debug enables various hwloc maintainer-level debugging controls. This option is not recomended for end users.])) # Doxygen? AC_ARG_ENABLE([doxygen], [AC_HELP_STRING([--enable-doxygen], [enable support for building Doxygen documentation (note that this option is ONLY relevant in developer builds; Doxygen documentation is pre-built for tarball builds and this option is therefore ignored)])]) # Picky? AC_ARG_ENABLE(picky, AC_HELP_STRING([--disable-picky], [When in developer checkouts of hwloc and compiling with gcc, the default is to enable maximum compiler pickyness. Using --disable-picky or --enable-picky overrides any default setting])) # Cairo? AC_ARG_ENABLE([cairo], AS_HELP_STRING([--disable-cairo], [Disable the Cairo back-end of hwloc's lstopo command])) # CPUID AC_ARG_ENABLE([cpuid], AS_HELP_STRING([--disable-cpuid], [Disable the cpuid-based architecture specific support (x86 component)])) # XML using libxml2? AC_ARG_ENABLE([libxml2], AS_HELP_STRING([--disable-libxml2], [Do not use libxml2 for XML support, use a custom minimalistic support])) # I/O? AC_ARG_ENABLE([io], AS_HELP_STRING([--disable-io], [Disable I/O discovery build entirely (PCI, LinuxIO, CUDA, OpenCL, NVML, RSMI, GL) instead of only disabling it at runtime by default])) # PCI? AC_ARG_ENABLE([pci], AS_HELP_STRING([--disable-pci], [Disable the PCI device discovery build (instead of only disabling PCI at runtime by default)])) # 32bits_pci_domain? AC_ARG_ENABLE([32bits-pci-domain], AS_HELP_STRING([--enable-32bits-pci-domain], [Enable 32 bits PCI domains (domains > 16bits are ignored by default). WARNING: This breaks the library ABI, don't enable unless really needed.])) # OpenCL? AC_ARG_ENABLE([opencl], AS_HELP_STRING([--disable-opencl], [Disable the OpenCL device discovery build (instead of only disabling OpenCL at runtime by default)])) # CUDA? AC_ARG_ENABLE([cuda], AS_HELP_STRING([--disable-cuda], [Disable the CUDA device discovery build using libcudart (instead of only disabling CUDA at runtime by default)])) # NVML? AC_ARG_ENABLE([nvml], AS_HELP_STRING([--disable-nvml], [Disable the NVML device discovery build (instead of only disabling NVML at runtime by default)])) # RSMI? AC_ARG_ENABLE([rsmi], AS_HELP_STRING([--disable-rsmi], [Disable the ROCm SMI device discovery])) # GL/Display AC_ARG_ENABLE([gl], AS_HELP_STRING([--disable-gl], [Disable the GL display device discovery (instead of only disabling GL at runtime by default)])) # LibUdev AC_ARG_ENABLE([libudev], AS_HELP_STRING([--disable-libudev], [Disable the Linux libudev])) # Plugins AC_ARG_ENABLE([plugins], AS_HELP_STRING([--enable-plugins=name,...], [Build the given components as dynamically-loaded plugins])) # Look for dlopen # Not --disable-dlopen because $enable_dlopen is already used/set AC_ARG_ENABLE([plugin-dlopen], AC_HELP_STRING([--disable-plugin-dlopen], [Do not use dlopen for loading plugins.])) # Look for ltdl # Not --disable-ltdl for consistency wrt dlopen above AC_ARG_ENABLE([plugin-ltdl], AC_HELP_STRING([--disable-plugin-ltdl], [Do not use ltdl for loading plugins.])) ])dnl #----------------------------------------------------------------------- dnl We only build documentation if this is a developer checkout. dnl Distribution tarballs just install pre-built docuemntation that was dnl included in the tarball. # Probably only ever invoked by hwloc's configure.ac AC_DEFUN([HWLOC_SETUP_DOCS],[ cat < /dev/null` AC_ARG_VAR([PDFLATEX], [Location of the pdflatex program (required for building the hwloc doxygen documentation)]) AC_PATH_TOOL([PDFLATEX], [pdflatex]) AC_ARG_VAR([MAKEINDEX], [Location of the makeindex program (required for building the hwloc doxygen documentation)]) AC_PATH_TOOL([MAKEINDEX], [makeindex]) AC_ARG_VAR([FIG2DEV], [Location of the fig2dev program (required for building the hwloc doxygen documentation)]) AC_PATH_TOOL([FIG2DEV], [fig2dev]) AC_ARG_VAR([GS], [Location of the gs program (required for building the hwloc doxygen documentation)]) AC_PATH_TOOL([GS], [gs]) AC_ARG_VAR([EPSTOPDF], [Location of the epstopdf program (required for building the hwloc doxygen documentation)]) AC_PATH_TOOL([EPSTOPDF], [epstopdf]) AC_MSG_CHECKING([if can build doxygen docs]) AS_IF([test "x$DOXYGEN" != "x" -a "x$PDFLATEX" != "x" -a "x$MAKEINDEX" != "x" -a "x$FIG2DEV" != "x" -a "x$GS" != "x" -a "x$EPSTOPDF" != "x"], [hwloc_generate_doxs=yes], [hwloc_generate_doxs=no]) AC_MSG_RESULT([$hwloc_generate_doxs]) AS_IF([test "x$hwloc_generate_doxs" = xyes -a "x$HWLOC_DOXYGEN_VERSION" = x1.6.2], [hwloc_generate_doxs="no"; AC_MSG_WARN([doxygen 1.6.2 has broken short name support, disabling])]) AS_IF([test "x$hwloc_generate_doxs" = xyes -a "x$HWLOC_DOXYGEN_VERSION" = x1.8.16 -a "$HWLOC_top_builddir" = "$HWLOC_top_srcdir"], [hwloc_generate_doxs="no"; AC_MSG_WARN([doxygen 1.8.16 fails when building inside the source-tree, disabling])]) AC_REQUIRE([AC_PROG_SED]) # Making the top-level README requires w3m or lynx. AC_ARG_VAR([W3M], [Location of the w3m program (required to building the top-level hwloc README file)]) AC_PATH_TOOL([W3M], [w3m]) AC_ARG_VAR([LYNX], [Location of the lynx program (required to building the top-level hwloc README file)]) AC_PATH_TOOL([LYNX], [lynx]) AC_MSG_CHECKING([if can build top-level README]) AS_IF([test "x$W3M" != "x"], [hwloc_generate_readme=yes HWLOC_W3_GENERATOR=$W3M], [AS_IF([test "x$LYNX" != "x"], [hwloc_generate_readme=yes HWLOC_W3_GENERATOR="$LYNX -dump -nolist"], [hwloc_generate_readme=no])]) AC_SUBST(HWLOC_W3_GENERATOR) AC_MSG_RESULT([$hwloc_generate_readme]) # If any one of the above tools is missing, we will refuse to make dist. AC_MSG_CHECKING([if will build doxygen docs]) AS_IF([test "x$hwloc_generate_doxs" = "xyes" -a "x$enable_doxygen" != "xno"], [], [hwloc_generate_doxs=no]) AC_MSG_RESULT([$hwloc_generate_doxs]) # See if we want to install the doxygen docs AC_MSG_CHECKING([if will install doxygen docs]) AS_IF([test "x$hwloc_generate_doxs" = "xyes" -o \ -f "$srcdir/doc/doxygen-doc/man/man3/hwloc_distrib.3" -a \ -f "$srcdir/doc/doxygen-doc/hwloc-a4.pdf" -a \ -f "$srcdir/doc/doxygen-doc/hwloc-letter.pdf"], [hwloc_install_doxs=yes], [hwloc_install_doxs=no]) AC_MSG_RESULT([$hwloc_install_doxs]) # Generate some files for the docs AC_CONFIG_FILES( hwloc_config_prefix[doc/Makefile] hwloc_config_prefix[doc/examples/Makefile] hwloc_config_prefix[doc/doxygen-config.cfg]) ]) #----------------------------------------------------------------------- # Probably only ever invoked by hwloc's configure.ac AC_DEFUN([HWLOC_SETUP_UTILS],[ cat <= 2.70 and in some backports if test "x${runstatedir}" != "x"; then HWLOC_runstatedir=${runstatedir} else HWLOC_runstatedir='${localstatedir}/run' fi AC_SUBST([HWLOC_runstatedir]) # X11 support AC_PATH_XTRA CPPFLAGS_save=$CPPFLAGS LIBS_save=$LIBS CPPFLAGS="$CPPFLAGS $X_CFLAGS" LIBS="$LIBS $X_PRE_LIBS $X_LIBS $X_EXTRA_LIBS" AC_CHECK_HEADERS([X11/Xlib.h], [AC_CHECK_LIB([X11], [XOpenDisplay], [ AC_CHECK_HEADERS([X11/Xutil.h], [AC_CHECK_HEADERS([X11/keysym.h], [AC_DEFINE([HWLOC_HAVE_X11_KEYSYM], [1], [Define to 1 if X11 headers including Xutil.h and keysym.h are available.]) hwloc_x11_keysym_happy=yes HWLOC_X11_CPPFLAGS="$X_CFLAGS" AC_SUBST([HWLOC_X11_CPPFLAGS]) HWLOC_X11_LIBS="$X_PRE_LIBS $X_LIBS -lX11 $X_EXTRA_LIBS" AC_SUBST([HWLOC_X11_LIBS])]) ], [], [#include ]) ]) ]) CPPFLAGS=$CPPFLAGS_save LIBS=$LIBS_save # Cairo support hwloc_cairo_happy=no if test "x$enable_cairo" != "xno"; then HWLOC_PKG_CHECK_MODULES([CAIRO], [cairo], [cairo_fill], [cairo.h], [hwloc_cairo_happy=yes], [hwloc_cairo_happy=no]) fi if test "x$hwloc_cairo_happy" = "xyes"; then AC_DEFINE([HWLOC_HAVE_CAIRO], [1], [Define to 1 if you have the `cairo' library.]) AC_MSG_CHECKING([whether lstopo Cairo/X11 interactive graphical output is supported]) if test "x$hwloc_x11_keysym_happy" = xyes; then save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS $HWLOC_CAIRO_CFLAGS $HWLOC_X11_CPPFLAGS" AC_PREPROC_IFELSE([ AC_LANG_PROGRAM([[ #include ]], [[ #ifndef CAIRO_HAS_XLIB_SURFACE #error #endif ]]) ], [ AC_MSG_RESULT([yes]) lstopo_have_x11=yes AC_DEFINE([LSTOPO_HAVE_X11], 1, [Define if lstopo Cairo/X11 interactive graphical output is supported]) ], [ AC_MSG_RESULT([no (missing CAIRO_HAS_XLIB_SURFACE)]) ]) CPPFLAGS="$save_CPPFLAGS" else AC_MSG_RESULT([no (missing X11)]) fi else AS_IF([test "$enable_cairo" = "yes"], [AC_MSG_WARN([--enable-cairo requested, but Cairo/X11 support was not found]) AC_MSG_ERROR([Cannot continue])]) fi AC_CHECK_TYPES([wchar_t], [ AC_CHECK_FUNCS([putwc]) ], [], [[#include ]]) HWLOC_XML_LOCALIZED=1 AC_CHECK_HEADERS([locale.h xlocale.h], [ AC_CHECK_FUNCS([setlocale]) AC_CHECK_FUNCS([uselocale], [HWLOC_XML_LOCALIZED=0]) ]) AC_SUBST([HWLOC_XML_LOCALIZED]) AC_CHECK_HEADERS([langinfo.h], [ AC_CHECK_FUNCS([nl_langinfo]) ]) hwloc_old_LIBS="$LIBS" chosen_curses="" for curses in ncurses curses do for lib in "" -ltermcap -l${curses}w -l$curses -ltinfo do AC_MSG_CHECKING(termcap support using $curses and $lib) LIBS="$hwloc_old_LIBS $lib" AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <$curses.h> #include ]], [[tparm(NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0)]])], [ AC_MSG_RESULT(yes) AC_SUBST([HWLOC_TERMCAP_LIBS], ["$LIBS"]) AC_DEFINE([HWLOC_HAVE_LIBTERMCAP], [1], [Define to 1 if you have a library providing the termcap interface]) chosen_curses=$curses ], [ AC_MSG_RESULT(no) ]) test "x$chosen_curses" != "x" && break done test "x$chosen_curses" != "x" && break done if test "$chosen_curses" = ncurses then AC_DEFINE([HWLOC_USE_NCURSES], [1], [Define to 1 if ncurses works, preferred over curses]) fi LIBS="$hwloc_old_LIBS" unset hwloc_old_LIBS _HWLOC_CHECK_DIFF_U _HWLOC_CHECK_DIFF_W # Solaris needs -lsocket for socket/bind/... in hwloc-ps AC_CHECK_DECLS([bind], [ AC_CHECK_LIB([socket], [bind], [need_libsocket=yes]) ], [], [[#include ]]) if test x$need_libsocket = xyes; then # keep -lsocket first in case there's also -lnsl which cannot be before -lsocket HWLOC_PS_LIBS="-lsocket $HWLOC_PS_LIBS" fi AC_SUBST(HWLOC_PS_LIBS) AC_CHECK_HEADERS([time.h], [ AC_CHECK_FUNCS([clock_gettime]) ]) # Only generate this if we're building the utilities # Even the netloc library Makefile is here because # we don't embed libnetloc yet, it's useless without tools AC_CONFIG_FILES( hwloc_config_prefix[utils/Makefile] hwloc_config_prefix[utils/hwloc/Makefile] hwloc_config_prefix[utils/lstopo/Makefile] hwloc_config_prefix[hwloc.pc] hwloc_config_prefix[netloc/Makefile] hwloc_config_prefix[utils/netloc/infiniband/Makefile] hwloc_config_prefix[utils/netloc/draw/Makefile] hwloc_config_prefix[utils/netloc/scotch/Makefile] hwloc_config_prefix[utils/netloc/mpi/Makefile] hwloc_config_prefix[netloc.pc] hwloc_config_prefix[netlocscotch.pc] ) ])dnl #----------------------------------------------------------------------- # Probably only ever invoked by hwloc's configure.ac AC_DEFUN([HWLOC_SETUP_TESTS],[ cat <]) ])]) AC_CHECK_HEADERS([stdlib.h], [ AC_CHECK_FUNCS([mkstemp]) ]) AC_CHECK_HEADERS([infiniband/verbs.h], [ AC_CHECK_LIB([ibverbs], [ibv_open_device], [AC_DEFINE([HAVE_LIBIBVERBS], 1, [Define to 1 if we have -libverbs]) hwloc_have_libibverbs=yes]) ]) AC_CHECK_PROGS(XMLLINT, [xmllint]) AC_CHECK_PROGS(BUNZIPP, bunzip2, false) AC_MSG_CHECKING(if CXX works) AC_LANG_PUSH([C++]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include using namespace std; int foo(void) { cout << "test" << endl; return 0; } ]])], [hwloc_have_cxx=yes], [hwloc_have_cxx=no]) AC_LANG_POP([C++]) AC_MSG_RESULT([$hwloc_have_cxx]) _HWLOC_CHECK_DIFF_U # Only generate these files if we're making the tests AC_CONFIG_FILES( hwloc_config_prefix[tests/Makefile] hwloc_config_prefix[tests/hwloc/Makefile] hwloc_config_prefix[tests/hwloc/linux/Makefile] hwloc_config_prefix[tests/hwloc/linux/allowed/Makefile] hwloc_config_prefix[tests/hwloc/linux/gather/Makefile] hwloc_config_prefix[tests/hwloc/x86/Makefile] hwloc_config_prefix[tests/hwloc/x86+linux/Makefile] hwloc_config_prefix[tests/hwloc/xml/Makefile] hwloc_config_prefix[tests/hwloc/ports/Makefile] hwloc_config_prefix[tests/hwloc/rename/Makefile] hwloc_config_prefix[tests/hwloc/linux/allowed/test-topology.sh] hwloc_config_prefix[tests/hwloc/linux/gather/test-gather-topology.sh] hwloc_config_prefix[tests/hwloc/linux/test-topology.sh] hwloc_config_prefix[tests/hwloc/x86/test-topology.sh] hwloc_config_prefix[tests/hwloc/x86+linux/test-topology.sh] hwloc_config_prefix[tests/hwloc/xml/test-topology.sh] hwloc_config_prefix[tests/hwloc/wrapper.sh] hwloc_config_prefix[utils/hwloc/hwloc-compress-dir] hwloc_config_prefix[utils/hwloc/hwloc-gather-topology] hwloc_config_prefix[utils/hwloc/test-hwloc-annotate.sh] hwloc_config_prefix[utils/hwloc/test-hwloc-calc.sh] hwloc_config_prefix[utils/hwloc/test-hwloc-compress-dir.sh] hwloc_config_prefix[utils/hwloc/test-hwloc-diffpatch.sh] hwloc_config_prefix[utils/hwloc/test-hwloc-distrib.sh] hwloc_config_prefix[utils/hwloc/test-hwloc-info.sh] hwloc_config_prefix[utils/hwloc/test-fake-plugin.sh] hwloc_config_prefix[utils/hwloc/test-parsing-flags.sh] hwloc_config_prefix[utils/hwloc/test-hwloc-dump-hwdata/Makefile] hwloc_config_prefix[utils/hwloc/test-hwloc-dump-hwdata/test-hwloc-dump-hwdata.sh] hwloc_config_prefix[utils/lstopo/test-lstopo.sh] hwloc_config_prefix[utils/lstopo/test-lstopo-shmem.sh] hwloc_config_prefix[utils/netloc/infiniband/netloc_ib_gather_raw] hwloc_config_prefix[contrib/hwloc-ps.www/Makefile] hwloc_config_prefix[contrib/systemd/Makefile] hwloc_config_prefix[contrib/completion/Makefile] hwloc_config_prefix[contrib/misc/Makefile] hwloc_config_prefix[contrib/windows/Makefile] hwloc_config_prefix[contrib/windows/test-windows-version.sh] hwloc_config_prefix[tests/netloc/Makefile] hwloc_config_prefix[tests/netloc/tests.sh] ) AC_CONFIG_COMMANDS([chmoding-scripts], [chmod +x] \ hwloc_config_prefix[tests/hwloc/linux/test-topology.sh] \ hwloc_config_prefix[tests/hwloc/x86/test-topology.sh] \ hwloc_config_prefix[tests/hwloc/x86+linux/test-topology.sh] \ hwloc_config_prefix[tests/hwloc/xml/test-topology.sh] \ hwloc_config_prefix[tests/hwloc/linux/allowed/test-topology.sh] \ hwloc_config_prefix[tests/hwloc/linux/gather/test-gather-topology.sh] \ hwloc_config_prefix[tests/hwloc/wrapper.sh] \ hwloc_config_prefix[utils/hwloc/hwloc-compress-dir] \ hwloc_config_prefix[utils/hwloc/hwloc-gather-topology] \ hwloc_config_prefix[utils/hwloc/test-hwloc-annotate.sh] \ hwloc_config_prefix[utils/hwloc/test-hwloc-calc.sh] \ hwloc_config_prefix[utils/hwloc/test-hwloc-compress-dir.sh] \ hwloc_config_prefix[utils/hwloc/test-hwloc-diffpatch.sh] \ hwloc_config_prefix[utils/hwloc/test-hwloc-distrib.sh] \ hwloc_config_prefix[utils/hwloc/test-hwloc-info.sh] \ hwloc_config_prefix[utils/hwloc/test-fake-plugin.sh] \ hwloc_config_prefix[utils/hwloc/test-parsing-flags.sh] \ hwloc_config_prefix[utils/hwloc/test-hwloc-dump-hwdata/test-hwloc-dump-hwdata.sh] \ hwloc_config_prefix[utils/lstopo/test-lstopo.sh] \ hwloc_config_prefix[utils/lstopo/test-lstopo-shmem.sh] \ hwloc_config_prefix[utils/netloc/infiniband/netloc_ib_gather_raw] \ hwloc_config_prefix[contrib/windows/test-windows-version.sh] \ hwloc_config_prefix[tests/netloc/tests.sh]) # These links are only needed in standalone mode. It would # be nice to m4 foreach this somehow, but whenever I tried # it, I got obscure "invalid tag" errors from # AC_CONFIG_LINKS. :-\ Since these tests are only run when # built in standalone mode, only generate them in # standalone mode. AC_CONFIG_LINKS( hwloc_config_prefix[tests/hwloc/ports/topology-solaris.c]:hwloc_config_prefix[hwloc/topology-solaris.c] hwloc_config_prefix[tests/hwloc/ports/topology-solaris-chiptype.c]:hwloc_config_prefix[hwloc/topology-solaris-chiptype.c] hwloc_config_prefix[tests/hwloc/ports/topology-aix.c]:hwloc_config_prefix[hwloc/topology-aix.c] hwloc_config_prefix[tests/hwloc/ports/topology-windows.c]:hwloc_config_prefix[hwloc/topology-windows.c] hwloc_config_prefix[tests/hwloc/ports/topology-darwin.c]:hwloc_config_prefix[hwloc/topology-darwin.c] hwloc_config_prefix[tests/hwloc/ports/topology-freebsd.c]:hwloc_config_prefix[hwloc/topology-freebsd.c] hwloc_config_prefix[tests/hwloc/ports/topology-netbsd.c]:hwloc_config_prefix[hwloc/topology-netbsd.c] hwloc_config_prefix[tests/hwloc/ports/topology-hpux.c]:hwloc_config_prefix[hwloc/topology-hpux.c] hwloc_config_prefix[tests/hwloc/ports/topology-bgq.c]:hwloc_config_prefix[hwloc/topology-bgq.c] hwloc_config_prefix[tests/hwloc/ports/topology-opencl.c]:hwloc_config_prefix[hwloc/topology-opencl.c] hwloc_config_prefix[tests/hwloc/ports/topology-cuda.c]:hwloc_config_prefix[hwloc/topology-cuda.c] hwloc_config_prefix[tests/hwloc/ports/topology-nvml.c]:hwloc_config_prefix[hwloc/topology-nvml.c] hwloc_config_prefix[tests/hwloc/ports/topology-rsmi.c]:hwloc_config_prefix[hwloc/topology-rsmi.c] hwloc_config_prefix[tests/hwloc/ports/topology-gl.c]:hwloc_config_prefix[hwloc/topology-gl.c] hwloc_config_prefix[tests/hwloc/ports/lstopo-windows.c]:hwloc_config_prefix[utils/lstopo/lstopo-windows.c] hwloc_config_prefix[tests/hwloc/ports/lstopo-android.c]:hwloc_config_prefix[utils/lstopo/lstopo-android.c]) ]) ])dnl #----------------------------------------------------------------------- AC_DEFUN([_HWLOC_PROG_DIFF], [ AC_ARG_VAR(DIFF, [diff tool]) AC_PATH_PROG([DIFF], [diff]) ]) AC_DEFUN([_HWLOC_CHECK_DIFF_U], [ AC_REQUIRE([_HWLOC_PROG_DIFF]) AC_MSG_CHECKING([whether diff accepts -u]) if $DIFF -u /dev/null /dev/null 2> /dev/null then AC_MSG_RESULT([yes]) HWLOC_DIFF_U="-u" else AC_MSG_RESULT([no]) HWLOC_DIFF_U="" fi AC_SUBST([HWLOC_DIFF_U]) ]) AC_DEFUN([_HWLOC_CHECK_DIFF_W], [ AC_REQUIRE([_HWLOC_PROG_DIFF]) AC_MSG_CHECKING([whether diff accepts -w]) if $DIFF -w /dev/null /dev/null 2> /dev/null then AC_MSG_RESULT([yes]) HWLOC_DIFF_W="-w" else AC_MSG_RESULT([no]) HWLOC_DIFF_W="" fi AC_SUBST([HWLOC_DIFF_W]) ])