Here are two patches to fix up the c++ (and c) support in the

configuration system.  The idea is to make the configure arguments
that specify compilers to be compatible with the other --with
options.  The main point, though, is that the c++ support is on by
default, but can easily be disabled by the --without-CXX option
for those few(?) that don't want it.

Brook Milligan

INSTALL

@@ -286,6 +286,16 @@ PostgreSQL:
                           for archive libraries.  (Typical use will need
                           --with-libraries=/usr/local/lib)
 
+       --with-CC=compiler
+                          Use a specific C compiler that the configure
+                          script cannot find.
+
+       --with-CXX=compiler
+       --without-CXX
+                          Use a specific C++ compiler that the configure
+                          script cannot find, or exclude C++ compilation
+                          altogether.
+
      As an example, here is the configure script I use on a Sparc
      Solaris 2.5 system with /opt/postgres being the install base.
 

src/configure.in

@@ -280,12 +280,18 @@ AC_ARG_ENABLE(
    AC_MSG_RESULT(disabled)
 )
 
-if test "X$with_compiler" != "X"
-then
-	CC=$with_compiler
-else
-	AC_PROG_CC
-fi
+dnl Check for C support (allow override if needed)
+AC_ARG_WITH(CC,
+    [  --with-CC=compiler     use specific C compiler],
+    [
+	case "$withval" in
+	"" | y | ye | yes | n | no)
+	    AC_MSG_ERROR([*** You must supply an argument to the --with-CC option.])
+	  ;;
+	esac
+	CC="$withval"
+    ],
+    [   AC_PROG_CC])
 
 if test "$CC" = "gcc"
 then
@@ -320,21 +326,24 @@ AC_SUBST(USE_TCL)
 AC_SUBST(USE_PERL)
 AC_SUBST(MB)
 
-dnl ****************************************************************
-dnl Hold off on the C++ stuff until we can figure out why it doesn't 
-dnl work under Solaris..
-dnl
-dnl AC_PROG_CXX
-dnl
-dnl Check if we should set   Have_Cplusplus
-dnl if test -n "$CXX"; then
-dnl   export HAVECXX
-dnl   HAVECXX='HAVE_Cplusplus=true'
-dnl fi
-dnl AC_SUBST(HAVECXX)
-dnl ****************************************************************
-HAVECXX='HAVE_Cplusplus=false'
+dnl Check for C++ support (allow override if needed)
+HAVECXX='HAVE_Cplusplus=true'
+AC_ARG_WITH(CXX,
+    [  --with-CXX=compiler     use specific C++ compiler],
+    [
+	case "$withval" in
+	"" | y | ye | yes)
+	    AC_MSG_ERROR([*** You must supply an argument to the --with-CC option.])
+	  ;;
+	n | no)
+	    HAVECXX='HAVE_Cplusplus=false'
+	  ;;
+	esac
+	CXX="$withval"
+    ],
+    [   AC_PROG_CXX])
 AC_SUBST(HAVECXX)
+
 INSTALLPATH="/usr/ucb:$PATH"
 AC_PATH_PROGS(INSTALL, ginstall installbsd bsdinst scoinst install, NONE, $INSTALLPATH)
 if test $INSTALL = "NONE"