Don't rebuild Python or Java bindings unless C++ interface changes.

[libsigrok.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index c35bf4245ab8c02b0d6ee5bbebe0cd8cb97ba3de..7e8340cdf8cefeff5f1f1f7488d77491a39ec7db 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,12 @@ AC_PROG_LN_S
 # Required for per-target flags or subdir-objects with C sources.
 AM_PROG_CC_C_O
 
-# Check if order-only dependencies are supported.
+# Get compiler versions.
+SR_PROG_VERSION([$CC], [sr_cc_version])
+SR_PROG_VERSION([$CXX], [sr_cxx_version])
+
+# Check for optional make features.
+SR_PROG_MAKE_NO_PRINT_DIRECTORY
 SR_PROG_MAKE_ORDER_ONLY
 
 # Initialize libtool.
@@ -91,10 +96,15 @@ SR_ARG_OPT_PKG([libftdi], [LIBFTDI],,
 
 # FreeBSD comes with an "integrated" libusb-1.0-style USB API.
 # This means libusb-1.0 is always available; no need to check for it.
-AS_CASE([$host], [*freebsd*], [sr_have_libusb=yes])
+# On Windows, require the latest version we can get our hands on,
+# until the new generic event handling has seen an official release.
+AS_CASE([$host_os],
+       [freebsd*], [sr_libusb_req='libusb-1.0' sr_have_libusb=yes],
+       [mingw*], [sr_libusb_req='libusb-1.0 >= 1.0.20'],
+       [sr_libusb_req='libusb-1.0 >= 1.0.16'])
 
 SR_ARG_OPT_PKG([libusb], [LIBUSB_1_0], [NEED_USB],
-       [libusb-1.0 >= 1.0.16])
+       [$sr_libusb_req])
 
 SR_ARG_OPT_PKG([librevisa], [LIBREVISA], [NEED_VISA],
        [librevisa >= 0.0.20130412])
@@ -108,7 +118,7 @@ SR_ARG_OPT_CHECK([libieee1284], [LIBIEEE1284],, [
        AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <ieee1284.h>]],
                                [[(void) ieee1284_open(0, 0, 0);]])],
                [sr_have_libieee1284=yes], [sr_have_libieee1284=no])
-       sr_save_LIBS=$LIBS
+       LIBS=$sr_save_LIBS
 ])
 AS_IF([test "x$sr_have_libieee1284" = xyes],
        [SR_PREPEND([SR_EXTRA_LIBS], [-lieee1284])])
@@ -420,6 +430,18 @@ AM_COND_IF([BINDINGS_CXX], [
        PKG_CHECK_MODULES([LIBSIGROKCXX], [$SR_PKGLIBS_CXX])
        PKG_CHECK_MODULES([PYSIGROK], [$SR_PKGLIBS_PYTHON $SR_PKGLIBS_CXX])
 ])
+
+# Check for specific libusb features, now that we know the CFLAGS.
+AC_LANG([C])
+sr_save_cflags=$CFLAGS
+CFLAGS="$LIBSIGROK_CFLAGS $CFLAGS"
+AC_CHECK_TYPES([libusb_os_handle],
+       [sr_have_libusb_os_handle=yes], [sr_have_libusb_os_handle=no],
+       [[#include <libusb.h>]])
+CFLAGS=$sr_save_cflags
+AM_COND_IF([NEED_USB], [AS_CASE([$sr_have_libusb_os_handle:$host_os], [no:mingw*],
+       [AC_MSG_ERROR([Windows builds require the event-abstraction branch of libusb])])])
+
 sr_glib_version=`$PKG_CONFIG --modversion glib-2.0 2>&AS_MESSAGE_LOG_FD`
 sr_libzip_version=`$PKG_CONFIG --modversion libzip 2>&AS_MESSAGE_LOG_FD`
 
@@ -448,11 +470,15 @@ libsigrok configuration summary:
  - Prefix.......................... $prefix
  - Building on..................... $build
  - Building for.................... $host
+
+Compile configuration:
  - C compiler...................... $CC
+ - C compiler version.............. $sr_cc_version
  - C compiler flags................ $CFLAGS
  - Additional C compiler flags..... $SR_EXTRA_CFLAGS
  - C compiler warnings............. $SR_WFLAGS
  - C++ compiler.................... $CXX
+ - C++ compiler version............ $sr_cxx_version
  - C++ compiler flags.............. $CXXFLAGS
  - C++ compiler warnings........... $SR_WXXFLAGS