Merge branch 'develop' into mobile

CHANGELOG

@@ -40,7 +40,7 @@
      ecl_import_current_thread
      ecl_release_current_thread
 
-   - When cl-truename encounters a broken symlink it returns it's path
+   - When cl-truename encounters a broken symlink, it returns its path
      instead of signalling a file-error
 
    - Deprecated variables has been removed
@@ -55,6 +55,15 @@
 
    - C99 supporting compiler is mandatory for C backend.
 
+   - COMPILER::*cc_is_cxx*: New variable to switch the output extension of
+     emitted compiler code to ".cxx" when configured with "--with-c++". This
+     eliminates compiler warnings that compiling C++ with a ".c" extension is
+     deprecated; this is seen mostly with Clang++.
+
+   - Added Clang-specific pragmas to disable return type, unused value and
+     excessive parentheses warnings, which are fairly harmless, but annoying
+     and clutter user output.
+
 ** Enhancements:
 
    - Added code walker (present as *feature* :walker)

LICENSE

@@ -28,11 +28,13 @@
 	src/lsp/format.lsp	; CMUCL's format
   and the directories
 	contrib/		; User contributed extensions
+        examples/               ; Examples for the ECL usage
 	src/clx/		; portable CLX library from Telent
   Look the precise copyright of these extensions in the corresponding
   files.
+  Examples are licensed under: (SPDX-License-Identifier) BSD-2-Clause
 
   Report bugs, comments, suggestions to the ecl mailing list:
-  ecls-list@lists.sourceforge.net.
+  ecl-devel@common-lisp.net.
 
 ---- END OF COPYRIGHT FOR THE ECL CORE ENVIRONMENT ------------------

src/cmp/cmpdefs.lsp

@@ -52,6 +52,9 @@ coprocessor).")
 			  (t
 			   "~A -I. \"-I~A\" ~A ~:[~*~;~A~] -w -c \"~A\" -o \"~A\"~{ '~A'~}")))
 
+(defvar *cc-is-cxx* @CC_IS_CXX@
+  "ECL's compiler is really the C++ compiler, not a C compiler.")
+
 #-dlopen
 (defvar *ld-flags* "@LDFLAGS@ -lecl @CORE_LIBS@ @FASL_LIBS@ @LIBS@")
 #+dlopen

src/cmp/cmpmain.lsp

@@ -57,7 +57,7 @@ the environment variable TMPDIR to a different value." template))
       ((:static-library :library :lib) (setf format +static-library-format+))
       (:data (setf extension "data"))
       (:sdata (setf extension "sdat"))
-      (:c (setf extension "c"))
+      (:c (setf extension (if (not *cc-is-cxx*) "c" "cxx")))
       (:h (setf extension "eclh"))
       (:object (setf extension +object-file-extension+))
       (:program (setf format +executable-file-format+))

src/configure

@@ -627,6 +627,7 @@ ECL_EXTRA_LISP_FILES
 CHAR_CODE_LIMIT
 ECL_CHARACTER
 CLX_INFO
+CC_IS_CXX
 ECL_CC
 POW_LIB
 LIBOBJS
@@ -9353,9 +9354,13 @@ fi
 if test ${with_cxx} = "no" ; then
   ECL_CC=${CC}
 
+  CC_IS_CXX="nil"
+
 else
   ECL_CC=${CXX}
 
+  CC_IS_CXX="t"
+
   boehm_configure_flags="${boehm_configure_flags} --enable-cplusplus"
 fi
 

src/configure.ac

@@ -746,8 +746,10 @@ dnl ----------------------------------------------------------------------
 dnl Do we use C or C++ compiler to compile ecl?
 if test ${with_cxx} = "no" ; then
   AC_SUBST([ECL_CC], [${CC}])
+  AC_SUBST([CC_IS_CXX], ["nil"])
 else
   AC_SUBST([ECL_CC], [${CXX}])
+  AC_SUBST([CC_IS_CXX], ["t"])
   boehm_configure_flags="${boehm_configure_flags} --enable-cplusplus"
 fi
 

src/h/ecl-cmp.h

@@ -21,6 +21,11 @@
  * defined */
 #define _WINSOCKAPI_
 #endif /* __CYGWIN__ */
+/* Disable a couple of clang's more annoying diagnostics */
+#pragma clang diagnostic ignored "-Wreturn-type"
+#pragma clang diagnostic ignored "-Wunused-value"
+#pragma clang diagnostic ignored "-Wparentheses-equality"
+
 #include <ecl/ecl.h>
 #include <math.h> /* for inline mathematics */
 #include <ecl/ecl-inl.h>