Upstream-Status: Pending, Submitted
http://code.google.com/p/xdelta/issues/detail?id=178

xdelta3: add --with-liblzma configure option

As xdelta3 can be compiled with or without liblzma external library, make it configurable.
Default is autodetect (unchanged behavior).

Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>
---
 configure.ac | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 3b430d7..8c53ba8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,8 +8,6 @@ AM_INIT_AUTOMAKE([1.9 no-define foreign tar-ustar])
 AX_CHECK_ALIGNED_ACCESS_REQUIRED
 AC_PROG_CC
 AC_PROG_CXX
-AC_CHECK_HEADERS([lzma.h])
-AC_CHECK_LIB(lzma, lzma_easy_buffer_encode)
 AC_CHECK_SIZEOF(size_t)
 #AM_PATH_PYTHON(,, [:])
 #AM_CONDITIONAL([HAVE_PYTHON], [test "$PYTHON" != :])
@@ -22,6 +20,25 @@ AC_ARG_ENABLE(debug-symbols,
    AS_HELP_STRING(--enable-debug-symbols,[Build with debug symbols (default is NO)]),,enableval=no)
 AM_CONDITIONAL([DEBUG_SYMBOLS], [test ${enableval} = "yes"])
 
+AC_ARG_WITH(
+    [liblzma],
+    [AC_HELP_STRING(
+        [--with-liblzma],
+        [build with liblzma support @<:@default=autodetect@:>@])],
+    [USE_LIBLZMA=$withval],
+    [USE_LIBLZMA=auto])
+
+if test "x$USE_LIBLZMA" != xno ; then
+    AC_CHECK_HEADERS([lzma.h],,[
+        if test "x$with_liblzma" = xyes ; then
+            AC_MSG_FAILURE([liblzma includes was not found])
+        fi])
+    AC_CHECK_LIB([lzma], [lzma_easy_buffer_encode],,[
+        if test "x$with_liblzma" = xyes ; then
+            AC_MSG_FAILURE([liblzma library was not found])
+        fi])
+fi
+
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT
-- 
1.8.5.4