configure: Accept glibmm-2.68 as an alternative to glibmm-2.4

[libsigrok.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 424b00022729e4ba70671bfdc17518c3b8646ed0..c98c55a4808b9921bce93e245134afdf481993ed 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -401,14 +401,41 @@ AC_ARG_ENABLE([java],
 
 sr_cxx_missing=
 
-# Check if the C++ compiler supports the C++11 standard.
-AX_CXX_COMPILE_STDCXX([11], [noext], [optional])
-AS_IF([test "x$HAVE_CXX11" != x1],
+# Check if the C++ compiler supports at least the C++11 standard.
+# Get the highest of the available C++17/C++14/C++11 standards.
+# This transparently amends CXXFLAGS to pick the detected standard.
+HAVE_MODERN_CXX=
+AS_IF([test "x$HAVE_MODERN_CXX" = x],
+       [AX_CXX_COMPILE_STDCXX([17], [noext], [optional])])
+AS_IF([test "x$HAVE_CXX17" = x1],
+       [HAVE_MODERN_CXX=yes])
+AS_IF([test "x$HAVE_MODERN_CXX" = x],
+       [AX_CXX_COMPILE_STDCXX([14], [noext], [optional])])
+AS_IF([test "x$HAVE_CXX14" = x1],
+       [HAVE_MODERN_CXX=yes])
+AS_IF([test "x$HAVE_MODERN_CXX" = x],
+       [AX_CXX_COMPILE_STDCXX([11], [noext], [optional])])
+AS_IF([test "x$HAVE_CXX11" = x1],
+       [HAVE_MODERN_CXX=yes])
+AS_IF([test "x$HAVE_MODERN_CXX" = x],
        [SR_APPEND([sr_cxx_missing], [', '], ['C++11'])])
 
 # The C++ bindings need glibmm.
-SR_PKG_CHECK([glibmm], [SR_PKGLIBS_CXX], [glibmm-2.4 >= 2.32.0])
+# Prefer glibmm-2.4 for backwards compatibility.
+# Accept glibmm-2.68 when glibmm-2.4 is not available.
+sr_have_glibmm=no
 AS_IF([test "x$sr_have_glibmm" != xyes],
+       [SR_PKG_CHECK([glibmm24], [SR_PKGLIBS_CXX], [glibmm-2.4 >= 2.32.0])])
+AS_IF([test "x$sr_have_glibmm24" = xyes],
+       [SR_APPEND([SR_GLIBMM_REQUIRES], [glibmm-2.4>=2.32.0])
+       sr_have_glibmm=yes])
+AS_IF([test "x$sr_have_glibmm" != xyes],
+       [SR_PKG_CHECK([glibmm268], [SR_PKGLIBS_CXX], [glibmm-2.68 >= 2.68.0])])
+AS_IF([test "x$sr_have_glibmm268" = xyes],
+       [SR_APPEND([SR_GLIBMM_REQUIRES], [glibmm-2.68>=2.68.0])
+       sr_have_glibmm=yes])
+AS_IF([test "x$sr_have_glibmm" = xyes],
+       [AC_SUBST(SR_GLIBMM_REQUIRES)],
        [SR_APPEND([sr_cxx_missing], [', '], [glibmm])])
 
 # The C++ bindings use Doxygen to parse libsigrok symbols.
@@ -630,9 +657,6 @@ AC_CHECK_FUNCS([ftdi_tciflush ftdi_tcoflush ftdi_tcioflush])
 LIBS=$sr_save_libs
 CFLAGS=$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`
 sr_zlib_version=`$PKG_CONFIG --modversion zlib 2>&AS_MESSAGE_LOG_FD`