[sandbox 01/10] Allow disabling build with lzma.

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Some linux distributions don't package static lzma library. Allow
disabling it.
---
 configure.ac                                | 14 +++++++++++++-
 libvirt-sandbox/libvirt-sandbox-init-qemu.c | 12 ++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 140fb8c..834a444 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,7 +81,14 @@ PKG_CHECK_MODULES(LIBVIRT_GLIB, libvirt-glib-1.0 >= $LIBVIRT_GOBJECT_REQUIRED)
 PKG_CHECK_MODULES(LIBVIRT_GOBJECT, libvirt-gobject-1.0 >= $LIBVIRT_GOBJECT_REQUIRED)
 PKG_CHECK_MODULES(LIBVIRT_GCONFIG, libvirt-gconfig-1.0 >= $LIBVIRT_GCONFIG_REQUIRED)
 PKG_CHECK_MODULES(ZLIB, zlib >= $ZLIB_REQUIRED)
-PKG_CHECK_MODULES(LZMA, liblzma >= $LZMA_REQUIRED)
+AC_ARG_WITH([lzma],
+  [AS_HELP_STRING([--with-lzma],
+    [add LZMA support @<:@default=yes@:>@])])
+m4_divert_text([DEFAULTS], [with_lzma=yes])
+
+if test "$with_lzma" = "yes" ; then
+    PKG_CHECK_MODULES(LZMA, liblzma >= $LZMA_REQUIRED)
+fi
 
 LIBVIRT_SANDBOX_CAPNG
 LIBVIRT_SANDBOX_GETTEXT
@@ -118,6 +125,11 @@ AC_MSG_NOTICE([])
 AC_MSG_NOTICE([])
 AC_MSG_NOTICE([ Libraries:])
 AC_MSG_NOTICE([])
+if test "$with_lzma" != "no" ; then
+AC_MSG_NOTICE([            LZMA: $LZMA_CFLAGS $LZMA_LIBS])
+else
+AC_MSG_NOTICE([            LZMA: no])
+fi
 AC_MSG_NOTICE([         GOBJECT: $GOBJECT_CFLAGS $GOBJECT_LIBS])
 AC_MSG_NOTICE([ LIBVIRT_GOBJECT: $LIBVIRT_GOBJECT_CFLAGS $LIBVIRT_GOBJECT_LIBS])
 AC_MSG_NOTICE([])
diff --git a/libvirt-sandbox/libvirt-sandbox-init-qemu.c b/libvirt-sandbox/libvirt-sandbox-init-qemu.c
index 2c2c803..e91dbcf 100644
--- a/libvirt-sandbox/libvirt-sandbox-init-qemu.c
+++ b/libvirt-sandbox/libvirt-sandbox-init-qemu.c
@@ -42,7 +42,9 @@
 #include <fcntl.h>
 #include <sys/reboot.h>
 #include <termios.h>
+#if WITH_LZMA
 #include <lzma.h>
+#endif /* WITH_LZMA */
 #include <zlib.h>
 
 #define ATTR_UNUSED __attribute__((__unused__))
@@ -492,6 +494,7 @@ has_suffix(const char *filename, const char *ext)
              offset[strlen(ext)] == '\0');
 }
 
+#if WITH_LZMA
 static char *
 load_module_file_lzma(const char *filename, size_t *len)
 {
@@ -548,6 +551,15 @@ load_module_file_lzma(const char *filename, size_t *len)
     free(xzdata);
     return data;
 }
+#else
+static char *
+load_module_file_lzma(const char *filename, size_t *len)
+{
+    fprintf(stderr, "libvirt-sandbox-init-qemu: %s: "
+            "lzma support disabled, can't read module %s\n", __func__, filename);
+    exit_poweroff();
+}
+#endif /* WITH_LZMA */
 
 static char *
 load_module_file_zlib(const char *filename, size_t *len)
-- 
2.1.4

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