Re: [libvirt] [PATCH] Add some automatic dependency checks for configure to enable/disable {ESX, UML, LXC, Xen-Inotify}

Hi! While building libVirt on an older Debian Etch machine, I stumbled across some automatic enabled drivers which stopped configure and make very badly due to missing header files, old libraries and stuff. So I decided to improve the automagic tests so others won't face the same problem again :)

>From e198b3ed1fcfa68465a31d75192a901fc72b2c14 Mon Sep 17 00:00:00 2001 From: Maximilian Wilhelm <max(a)rfc2324.org&gt; Date: Thu, 30 Jul 2009 20:18:30 +0200 Subject: [PATCH] * configure.in: Add automatic check for libcurl and disable ESX driver if not present --- configure.in | 22 +++++++++++++--------- 1 files changed, 13 insertions(+), 9 deletions(-) diff --git a/configure.in b/configure.in index b905b23..db559f1 100644 --- a/configure.in +++ b/configure.in @@ -198,7 +198,7 @@ AC_ARG_WITH([lxc], AC_ARG_WITH([one], [ --with-one add ONE support (on)],[],[with_one=check]) AC_ARG_WITH([esx], -[ --with-esx add ESX support (on)],[],[with_esx=yes]) +[ --with-esx add ESX support (on)],[],[with_esx=check]) AC_ARG_WITH([test], [ --with-test add test driver support (on)],[],[with_test=yes]) AC_ARG_WITH([remote], @@ -1139,7 +1139,7 @@ AC_SUBST([LIBPARTED_CFLAGS]) AC_SUBST([LIBPARTED_LIBS]) dnl -dnl check for libcurl +dnl check for libcurl (ESX) dnl LIBCURL_CFLAGS="" @@ -1147,13 +1147,17 @@ LIBCURL_LIBS="" LIBCURL_REQUIRED="7.18.0" LIBCURL_FOUND="no" -if test "$with_esx" = "yes" ; then - PKG_CHECK_MODULES(LIBCURL, libcurl >= $LIBCURL_REQUIRED, [LIBCURL_FOUND=yes], [LIBCURL_FOUND=no]) - - if test "$LIBCURL_FOUND" = "no"; then - AC_MSG_CHECKING(for libcurl libraries >= $LIBCURL_REQUIRED) - AC_MSG_ERROR([libcurl >= $LIBCURL_REQUIRED is required for the ESX driver]) - fi +if test "$with_esx" = "yes" -o "$with_esx" = "check"; then + PKG_CHECK_MODULES(LIBCURL, libcurl >= $LIBCURL_REQUIRED, [ + LIBCURL_FOUND=yes + ], [ + if test "$with_esx" = "check"; then + with_esx=no + AC_MSG_NOTICE([libcurl is required for ESX driver, disabling it]) + else + AC_MSG_ERROR([libcurl >= $LIBCURL_REQUIRED is required for the ESX driver]) + fi + ]) fi AC_SUBST([LIBCURL_CFLAGS]) -- 1.5.6.5

>From 6d88873f6d4bc38c338ad05fbc4491b3fcbd3c05 Mon Sep 17 00:00:00 2001 From: Maximilian Wilhelm <max(a)rfc2324.org&gt; Date: Thu, 30 Jul 2009 20:27:23 +0200 Subject: [PATCH] * configure.in: Add automatic check for <sys/inotify.h> header and disable the UML driver if not present --- configure.in | 25 ++++++++++++++++++++++++- 1 files changed, 24 insertions(+), 1 deletions(-) diff --git a/configure.in b/configure.in index db559f1..008424c 100644 --- a/configure.in +++ b/configure.in @@ -184,7 +184,7 @@ AC_ARG_WITH([xen-inotify], AC_ARG_WITH([qemu], [ --with-qemu add QEMU/KVM support (on)],[],[with_qemu=yes]) AC_ARG_WITH([uml], -[ --with-uml add UML support (on)],[],[with_uml=yes]) +[ --with-uml add UML support (on)],[],[with_uml=check]) AC_ARG_WITH([openvz], [ --with-openvz add OpenVZ support (on)],[],[with_openvz=yes]) AC_ARG_WITH([libssh], @@ -780,6 +780,29 @@ AM_CONDITIONAL([HAVE_NUMACTL], [test "$with_numactl" != "no"]) AC_SUBST([NUMACTL_CFLAGS]) AC_SUBST([NUMACTL_LIBS]) + +dnl +dnl Checks for the UML driver +dnl + +if test "$with_uml" = "yes" -o "$with_uml" = "check"; then + AC_CHECK_HEADER([sys/inotify.h], [ + with_uml=yes + ], [ + if test "$with_uml" = "check"; then + with_uml=no + AC_MSG_NOTICE([<sys/inotify.h> is required for the UML driver, disabling it]) + else + AC_MSG_ERROR([The <sys/inotify.h> is required for the UML driver. Upgrade your libc6.]) + fi + ]) +fi + + +dnl +dnl libssh checks +dnl + if test "$with_libssh" != "yes" -a "$with_libssh" != "no"; then libssh_path="$with_libssh" elif test "$with_libssh" = "yes"; then -- 1.5.6.5

>From aece7bd89b9c5f90412b252ec339fac0d072f9a6 Mon Sep 17 00:00:00 2001 From: Maximilian Wilhelm <max(a)rfc2324.org&gt; Date: Thu, 30 Jul 2009 20:30:08 +0200 Subject: [PATCH] Enable/disable LXC driver automatically. * configure.in: Check for <sched.h> header file and availability of the unshare() function within this header by performing a compile and link test. This function is required for the LXC driver. --- configure.in | 36 +++++++++++++++++++++++++++++++++++- 1 files changed, 35 insertions(+), 1 deletions(-) diff --git a/configure.in b/configure.in index 008424c..1a326af 100644 --- a/configure.in +++ b/configure.in @@ -194,7 +194,7 @@ AC_ARG_WITH([phyp], AC_ARG_WITH([vbox], [ --with-vbox add VirtualBox support (on)],[],[with_vbox=yes]) AC_ARG_WITH([lxc], -[ --with-lxc add Linux Container support (on)],[],[with_lxc=yes]) +[ --with-lxc add Linux Container support (on)],[],[with_lxc=check]) AC_ARG_WITH([one], [ --with-one add ONE support (on)],[],[with_one=check]) AC_ARG_WITH([esx], @@ -429,6 +429,40 @@ dnl check for kvm headers dnl AC_CHECK_HEADERS([linux/kvm.h]) +dnl +dnl check for sufficient headers for LXC +dnl +if test "$with_lxc" = "yes" -o "$with_lxc" = "check"; then + AC_CHECK_HEADER([sched.h], + dnl Header is there, check for unshare() + [ + AC_TRY_LINK([#define _GNU_SOURCE + #include <sched.h>], [ + unshare (1); + ], [ + with_lxc=yes + ], [ + if test "$with_lxc" = "check"; then + with_lxc=no + AC_MSG_NOTICE([Function unshare() not present in <sched.h> header but required for LXC driver, disabling it]) + else + AC_MSG_ERROR([Function unshare() not present in <sched.h> header, but required for LXC driver]) + fi + + ]) + + dnl Header is not there + ],[ + if test "$with_lxc" = "check"; then + with_lxc=no + AC_MSG_NOTICE([Header <sched.h> not found but required for LXC driver, disabling it]) + else + AC_MSG_ERROR([Header <sched.h> not found but required for LXC driver]) + fi + + ]) +fi + dnl OpenNebula driver Compilation setting dnl -- 1.5.6.5

>From 658d7e7ed06f7b1a672ff348a92e522dbb77d3be Mon Sep 17 00:00:00 2001 From: Maximilian Wilhelm <max(a)rfc2324.org&gt; Date: Thu, 30 Jul 2009 21:06:31 +0200 Subject: [PATCH] Fixed check for inotify header and build Xen inotify regarding to the result * configure.in: The Xen inotify code added in commit 1eeceaa649c6ff92baf13a4f31edb1eb0fdb5990 uses the <sys/inotify.h> header but the configure script checks for <linux/inotify.h> which is a different file and not used within the library. Use the existance of <sys/inotify.h> to decide wether Xen inotify support should be build or not. --- configure.in | 13 +++++++++++-- 1 files changed, 11 insertions(+), 2 deletions(-) diff --git a/configure.in b/configure.in index 1a326af..1f06c60 100644 --- a/configure.in +++ b/configure.in @@ -180,7 +180,7 @@ dnl Allow to build without Xen, QEMU/KVM, test or remote driver AC_ARG_WITH([xen], [ --with-xen add XEN support (on)],[],[with_xen=yes]) AC_ARG_WITH([xen-inotify], -[ --with-xen-inotify add XEN inotify support (on)],[],[with_xen_inotify=yes]) +[ --with-xen-inotify add XEN inotify support (on)],[],[with_xen_inotify=check]) AC_ARG_WITH([qemu], [ --with-qemu add QEMU/KVM support (on)],[],[with_qemu=yes]) AC_ARG_WITH([uml], @@ -409,7 +409,16 @@ if test "$with_xen" != "yes"; then with_xen_inotify=no fi if test "$with_xen_inotify" != "no"; then - AC_CHECK_HEADER([linux/inotify.h],[],[with_xen_inotify=no]) + AC_CHECK_HEADER([sys/inotify.h], [ + with_xen_inotify=yes + ], [ + if test "$with_xen_inotify" = "check"; then + with_xen_inotify=no + AC_MSG_NOTICE([Header file <sys/inotify.h> is required for Xen Inotify support, disabling it]) + else + AC_MSG_ERROR([Header file <sys/inotify.h> is required for Xen Inotify support!]) + fi + 0]) fi if test "$with_xen_inotify" = "yes"; then AC_DEFINE_UNQUOTED([WITH_XEN_INOTIFY], 1,[whether Xen inotify sub-driver is enabled]) -- 1.5.6.5