rigol-ds: fix search for the closest vdiv.

[libsigrok.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index d2340beaab7d08eec3406a641dd927dd829b047b..595dafe25623ed48b822b095bbc281b59e6f21e3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -33,6 +33,9 @@ AC_CONFIG_HEADER([config.h])
 AC_CONFIG_MACRO_DIR([autostuff])
 AC_CONFIG_AUX_DIR([autostuff])
 
+# We require this to know the target settings if we're cross-compiling.
+AC_CANONICAL_SYSTEM
+
 # We require at least automake 1.11 (needed for 'silent rules').
 AM_INIT_AUTOMAKE([1.11 -Wall -Werror subdir-objects check-news color-tests])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
@@ -260,8 +263,8 @@ AM_CONDITIONAL(NEED_RPC, test "x$have_rpc" != "x0")
 
 # libglib-2.0 is always needed. Abort if it's not found.
 # Note: glib-2.0 is part of the libsigrok API (hard pkg-config requirement).
-# We require at least 2.34.0 due to e.g. g_slist_deep_copy().
-AM_PATH_GLIB_2_0([2.34.0],
+# We require at least 2.32.0 due to e.g. g_variant_new_fixed_array().
+AM_PATH_GLIB_2_0([2.32.0],
        [LIB_CFLAGS="$LIB_CFLAGS $GLIB_CFLAGS"; LIBS="$LIBS $GLIB_LIBS"])
 
 # libzip is always needed. Abort if it's not found.
@@ -302,7 +305,7 @@ fi
 AM_CONDITIONAL(NEED_SERIAL, test "x$have_libserialport" != xno)
 
 # The VISA SCPI backend is only compiled in if librevisa was found.
-PKG_CHECK_MODULES([librevisa], [librevisa >= 0.0.20130812],
+PKG_CHECK_MODULES([librevisa], [librevisa >= 0.0.20130412],
        [have_librevisa="yes"; LIB_CFLAGS="$LIB_CFLAGS $librevisa_CFLAGS";
        LIBS="$LIBS $librevisa_LIBS";
        SR_PKGLIBS="$SR_PKGLIBS librevisa"],
@@ -396,7 +399,7 @@ PKG_CHECK_MODULES([glibmm], [glibmm-2.4 >= 2.32.0],
        [BINDINGS_CXX="no"; cxx_msg="glibmm required"])
 
 # C++ bindings want stoi and stod.
-if test "x$BINDINGS_CXX" == "xyes"; then
+if test "x$BINDINGS_CXX" = "xyes"; then
        AC_LANG_PUSH([C++])
        AC_MSG_CHECKING([for stoi and stod])
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <string>],
@@ -554,13 +557,13 @@ echo "Detected libraries:"
 echo
 
 # Note: This only works for libs with pkg-config integration.
-for lib in "glib-2.0 >= 2.34.0" "libzip >= 0.10" "libserialport >= 0.2.0" \
-       "librevisa >= 0.0.20130812" "libusb-1.0 >= 1.0.16" "libftdi >= 0.16" \
+for lib in "glib-2.0 >= 2.32.0" "libzip >= 0.10" "libserialport >= 0.2.0" \
+       "librevisa >= 0.0.20130412" "libusb-1.0 >= 1.0.16" "libftdi >= 0.16" \
        "libftdi1 >= 1.0" "libgpib" "glibmm-2.4 >= 2.32.0" \
        "pygobject-3.0 >= 3.0.0" "check >= 0.9.4"
 do
        optional="OPTIONAL"
-       if test "x$lib" = "xglib-2.0 >= 2.34.0"; then optional="REQUIRED"; fi
+       if test "x$lib" = "xglib-2.0 >= 2.32.0"; then optional="REQUIRED"; fi
        if test "x$lib" = "xlibzip >= 0.10"; then optional="REQUIRED"; fi
        if `$PKG_CONFIG --exists $lib`; then
                ver=`$PKG_CONFIG --modversion $lib`