X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=configure.ac;h=c35bf4245ab8c02b0d6ee5bbebe0cd8cb97ba3de;hb=82b01e42f8c1bace29fb273417571543548618ad;hp=b4a4332eae15f01932c649a693a790af3f3f490b;hpb=bbb3996c06f2b1ebc9529d1e2181ddc55f70d9da;p=libsigrok.git

diff --git a/configure.ac b/configure.ac
index b4a4332e..c35bf424 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,6 +46,9 @@ 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.
+SR_PROG_MAKE_ORDER_ONLY
+
 # Initialize libtool.
 LT_INIT
 
@@ -62,6 +65,8 @@ SR_LIB_VERSION_SET([SR_LIB_VERSION], [2:0:0])
 ##  Optional dependencies  ##
 #############################
 
+AC_LANG([C])
+
 # Initialize pkg-config.
 # We require at least 0.22, as "Requires.private" behaviour changed there.
 PKG_PROG_PKG_CONFIG([0.22])
@@ -76,6 +81,7 @@ SR_VAR_OPT_PKG([SR_PKGLIBS], [sr_deps_avail])
 SR_PKGLIBS_TESTS=
 SR_PKGLIBS_CXX=
 SR_PKGLIBS_PYTHON=
+SR_EXTRA_LIBS=
 
 SR_ARG_OPT_PKG([libserialport], [LIBSERIALPORT], [NEED_SERIAL],
 	[libserialport >= 0.1.1])
@@ -96,6 +102,17 @@ SR_ARG_OPT_PKG([librevisa], [LIBREVISA], [NEED_VISA],
 SR_ARG_OPT_PKG([libgpib], [LIBGPIB], [NEED_GPIB],
 	[libgpib])
 
+SR_ARG_OPT_CHECK([libieee1284], [LIBIEEE1284],, [
+	sr_save_LIBS=$LIBS
+	LIBS="-lieee1284 $LIBS"
+	AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <ieee1284.h>]],
+				[[(void) ieee1284_open(0, 0, 0);]])],
+		[sr_have_libieee1284=yes], [sr_have_libieee1284=no])
+	sr_save_LIBS=$LIBS
+])
+AS_IF([test "x$sr_have_libieee1284" = xyes],
+	[SR_PREPEND([SR_EXTRA_LIBS], [-lieee1284])])
+
 ######################
 ##  Feature checks  ##
 ######################
@@ -104,8 +121,6 @@ SR_ARG_OPT_PKG([libgpib], [LIBGPIB], [NEED_GPIB],
 SR_PKG_CHECK([check], [SR_PKGLIBS_TESTS], [check >= 0.9.4])
 AM_CONDITIONAL([HAVE_CHECK], [test "x$sr_have_check" = xyes])
 
-AC_LANG([C])
-
 # Enable the C99 standard if possible, and enforce the use
 # of SR_API to explicitly mark all public API functions.
 SR_EXTRA_CFLAGS=
@@ -123,7 +138,7 @@ AC_CHECK_HEADERS([sys/ioctl.h], [SR_APPEND([sr_deps_avail], [sys_ioctl_h])])
 AC_CHECK_HEADERS([sys/timerfd.h], [SR_APPEND([sr_deps_avail], [sys_timerfd_h])])
 
 # We need to link against the Winsock2 library for SCPI over TCP.
-AS_CASE([$host], [*-mingw*], [SR_EXTRA_LIBS='-lws2_32'], [SR_EXTRA_LIBS=])
+AS_CASE([$host_os], [mingw*], [SR_PREPEND([SR_EXTRA_LIBS], [-lws2_32])])
 
 # libm (the standard math library) is always needed.
 SR_SEARCH_LIBS([SR_EXTRA_LIBS], [pow], [m])
@@ -433,8 +448,12 @@ libsigrok configuration summary:
  - Prefix.......................... $prefix
  - Building on..................... $build
  - Building for.................... $host
+ - C compiler...................... $CC
+ - C compiler flags................ $CFLAGS
  - Additional C compiler flags..... $SR_EXTRA_CFLAGS
  - C compiler warnings............. $SR_WFLAGS
+ - C++ compiler.................... $CXX
+ - C++ compiler flags.............. $CXXFLAGS
  - C++ compiler warnings........... $SR_WXXFLAGS
 
 Detected libraries (required):