D compiler sanity checks in configure; check D2 by default if no D1 compiler can be found.

For both D1 and D2, if the compiler has not been specified explicitly via a command line option, the configure script tries to compile a minimal program stub. Only if this succeeds, the respective compiler is enabled.

If neither a working D1 nor a working D2 compiler has been found, D is skipped completely as usual.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12334 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/Makefile.in

@@ -1219,6 +1219,10 @@ go_clean:
 
 DLIBPREFIX = @DLIBPREFIX@
 
+ifeq (,$(D_VERSION))
+  D_VERSION = @DDEFAULTVERSION@
+endif
+
 ifeq (2,$(D_VERSION))
   SWIGD = $(SWIG) -d -d2
   DCOMPILER = @D2COMPILER@
@@ -1229,7 +1233,7 @@ endif
 
 ifeq (dmd,$(DCOMPILER))
   # DMD is 32bit only by now
-  CFLAGS += -m32
+  DCFLAGS = -m32
 endif
 
 # ----------------------------------------------------------------
@@ -1238,8 +1242,8 @@ endif
 
 d: $(SRCS)
 	$(SWIGD) $(SWIGOPT) $(INTERFACEPATH)
-	$(CC) -c $(CCSHARED) $(CFLAGS) $(EXTRA_CFLAGS) $(SRCS) $(ISRCS) $(INCLUDES)
+	$(CC) -c $(CCSHARED) $(CFLAGS) $(DCFLAGS) $(EXTRA_CFLAGS) $(SRCS) $(ISRCS) $(INCLUDES)
-	$(LDSHARED) $(CFLAGS) $(EXTRA_LDFLAGS) $(OBJS) $(IOBJS) $(LIBS) -o $(DLIBPREFIX)$(TARGET)$(SO)
+	$(LDSHARED) $(CFLAGS) $(DCFLAGS) $(EXTRA_LDFLAGS) $(OBJS) $(IOBJS) $(LIBS) -o $(DLIBPREFIX)$(TARGET)$(SO)
 
 # ----------------------------------------------------------------
 # Build a dynamically loadable D wrapper for a C++ module
@@ -1247,8 +1251,8 @@ d: $(SRCS)
 
 d_cpp: $(SRCS)
 	$(SWIGD) -c++ $(SWIGOPT) $(INTERFACEPATH)
-	$(CXX) -c $(CCSHARED) $(CFLAGS) $(EXTRA_CFLAGS) $(SRCS) $(CXXSRCS) $(ICXXSRCS) $(INCLUDES)
+	$(CXX) -c $(CCSHARED) $(CFLAGS) $(DCFLAGS) $(EXTRA_CFLAGS) $(SRCS) $(CXXSRCS) $(ICXXSRCS) $(INCLUDES)
-	$(CXXSHARED) $(CFLAGS) $(EXTRA_LDFLAGS) $(OBJS) $(IOBJS) $(LIBS) $(CPP_DLLIBS) -o $(DLIBPREFIX)$(TARGET)$(SO)
+	$(CXXSHARED) $(CFLAGS) $(DCFLAGS) $(EXTRA_LDFLAGS) $(OBJS) $(IOBJS) $(LIBS) $(CPP_DLLIBS) -o $(DLIBPREFIX)$(TARGET)$(SO)
 
 # ----------------------------------------------------------------
 # Compile D files

configure.in

@@ -2028,25 +2028,68 @@ AC_SUBST(GO)
 #----------------------------------------------------------------
 
 AC_ARG_WITH(d, AS_HELP_STRING([--without-d], [Disable D]), [with_d="$withval"], [with_d=yes])
-AC_ARG_WITH(d1-compiler, [  --with-d1-compiler=path  Set location of D1 compiler (DMD compatible)],[D1COMPILERBIN="$withval"], [D1COMPILERBIN=])
+AC_ARG_WITH(d1-compiler, [  --with-d1-compiler=path  Set location of D1/Tango compiler (DMD compatible)],[D1COMPILERBIN="$withval"], [D1COMPILERBIN=])
 AC_ARG_WITH(d2-compiler, [  --with-d2-compiler=path  Set location of D2 compiler (DMD compatible)],[D2COMPILERBIN="$withval"], [D2COMPILERBIN=])
 
+
 # First, check for "--without-d" or "--with-d=no".
 if test x"${with_d}" = xno -o x"${with_alllang}" = xno ; then
   AC_MSG_NOTICE([Disabling D])
   D1COMPILER=
   D2COMPILER=
 else
+  old_ac_ext=$ac_ext
+  ac_ext=d
+
   if test -z "$D1COMPILERBIN" ; then
     AC_CHECK_PROGS(D1COMPILER, dmd ldmd gdmd)
+
+    AC_MSG_CHECKING(whether the D1/Tango compiler works)
+    cat > conftest.$ac_ext <<_ACEOF
+import tango.io.Stdout;
+void main() {
+}
+_ACEOF
+    rm -f conftest.$ac_objext
+    AS_IF(
+      [_AC_DO_STDERR($D1COMPILER conftest.$ac_ext) && test ! -s conftest.err && test -s conftest.$ac_objext],
+      [AC_MSG_RESULT([yes])],
+      [_AC_MSG_LOG_CONFTEST AC_MSG_RESULT([no])
+      D1COMPILER=]
+    )
+    rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   else
     D1COMPILER="$D1COMPILERBIN"
   fi
+
   if test -z "$D2COMPILERBIN" ; then
     AC_CHECK_PROGS(D2COMPILER, dmd gdmd)
+
+    AC_MSG_CHECKING(whether the D2 compiler works)
+    cat > conftest.$ac_ext <<_ACEOF
+import std.algorithm;
+void main() {
+}
+_ACEOF
+    rm -f conftest.$ac_objext
+    AS_IF(
+      [_AC_DO_STDERR($D2COMPILER conftest.$ac_ext) && test ! -s conftest.err && test -s conftest.$ac_objext],
+      [AC_MSG_RESULT([yes])],
+      [_AC_MSG_LOG_CONFTEST AC_MSG_RESULT([no])
+      D2COMPILER=]
+    )
+    rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   else
     D2COMPILER="$D2COMPILERBIN"
   fi
+
+  ac_ext=$old_ac_ext
+fi
+
+if test -n "$D1COMPILER"; then
+  DDEFAULTVERSION=1
+elif test -n "$D2COMPILER"; then
+  DDEFAULTVERSION=2
 fi
 
 # Do not prefix library file names with "lib" on Windows.
@@ -2057,6 +2100,7 @@ esac
 
 AC_SUBST(D1COMPILER)
 AC_SUBST(D2COMPILER)
+AC_SUBST(DDEFAULTVERSION)
 AC_SUBST(DLIBPREFIX)
 
 #----------------------------------------------------------------
@@ -2216,7 +2260,7 @@ fi
 AC_SUBST(SKIP_GO)
 
 SKIP_D=
-if test -z "$D1COMPILER" && test -z "$D2COMPILER" ; then
+if test -z "$DDEFAULTVERSION" ; then
     SKIP_D="1"
 fi
 AC_SUBST(SKIP_D)