Added test by Henning Meier Geinitz: SANE_CHECK_JPEG to aclocal.m4 and configure[.in]

Oliver Rauch

acinclude.m4

@@ -81,3 +81,24 @@ AC_DEFUN(SANE_CHECK_PTAL,
 	unset PTAL_OLD_CPPFLAGS
 	unset PTAL_OLD_LDFLAGS
 ])
+
+#
+# Checks for jpeg library >= v6B (61), needed for DC210 backend.
+AC_DEFUN(SANE_CHECK_JPEG,
+[
+  AC_CHECK_LIB(jpeg,jpeg_start_decompress, 
+  [
+    AC_CHECK_HEADER(jconfig.h, 
+    [
+      AC_MSG_CHECKING([for jpeglib - version >= 61 (6a)])
+      AC_EGREP_CPP(sane_correct_jpeg_lib_version_found,
+      [
+        #include <jpeglib.h>
+        #if JPEG_LIB_VERSION >= 61
+          sane_correct_jpeg_lib_version_found
+        #endif
+      ],[sane_cv_use_libjpeg="yes"; LIBS="${LIBS} -ljpeg"; 
+      AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])
+    ],)
+  ],)
+])

aclocal.m4

@@ -94,6 +94,28 @@ AC_DEFUN(SANE_CHECK_PTAL,
 	unset PTAL_OLD_LDFLAGS
 ])
 
+#
+# Checks for jpeg library >= v6B (61), needed for DC210 backend.
+# Henning Meier Geinitz
+AC_DEFUN(SANE_CHECK_JPEG,
+[
+  AC_CHECK_LIB(jpeg,jpeg_start_decompress,
+  [
+    AC_CHECK_HEADER(jconfig.h,
+    [
+      AC_MSG_CHECKING([for jpeglib - version >= 61 (6a)])
+      AC_EGREP_CPP(sane_correct_jpeg_lib_version_found,
+      [
+        #include <jpeglib.h>
+        #if JPEG_LIB_VERSION >= 61
+          sane_correct_jpeg_lib_version_found
+        #endif
+      ],[sane_cv_use_libjpeg="yes"; LIBS="${LIBS} -ljpeg";
+      AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])
+    ],)
+  ],)
+])
+
 
 # serial 40 AC_PROG_LIBTOOL
 AC_DEFUN(AC_PROG_LIBTOOL,