[RFC] [PATCH] Change dependency-generating compiler from $(CC) to $(CXX) in gcc/

[Jan-Benedict Glaw]

On Tue, 2013-10-01 20:49:30 +0200, Jan-Benedict Glaw <jbglaw@lug-owl.de> wrote:
[...]
>   Since we're using $(CXX) instead of $(CC) these days, I suggest
> using CXX instead of CC. A quick check (without regenerating all
> configure and Makefile files just changing CC to CXX in gcc/configure)
> makes it build properly. (If done properly, some variables will change
> their name s/CC/CXX/, so that must be changed in some more files if
> done properly.)

For gcc/, I prepared this patch, which seems to work:


2013-10-01  Jan-Benedict Glaw  <jbglaw@lug-owl.de>

gcc/
	* configure.ac: Use CXX instead of CC for dependency generation.
	* Makefile.in: Change CCDEPMODE to CXXDEPMODE.
	* configure: Regenerate.

diff --git a/gcc/configure.ac b/gcc/configure.ac
index f216962..105c534 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -974,7 +974,7 @@ AC_CONFIG_COMMANDS([gccdepdir],[
       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
 
-ZW_PROG_COMPILER_DEPENDENCIES([CC])
+ZW_PROG_COMPILER_DEPENDENCIES([CXX])
 AC_LANG_POP(C++)
 
 # --------diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index f55f1d1..9a6369e 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -309,7 +309,7 @@ write_entries_to_file = $(shell rm -f $(2) || :) $(shell touch $(2)) \
 # --------
 
 # Dependency tracking stuff.
-CCDEPMODE = @CCDEPMODE@
+CXXDEPMODE = @CXXDEPMODE@
 DEPDIR = @DEPDIR@
 depcomp = $(SHELL) $(srcdir)/../depcomp
 
@@ -1029,7 +1029,7 @@ INCLUDES = -I. -I$(@D) -I$(srcdir) -I$(srcdir)/$(@D) \
 	   $(CLOOGINC) $(ISLINC)
 
 COMPILE.base = $(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) -o $@
-ifeq ($(CCDEPMODE),depmode=gcc3)
+ifeq ($(CXXDEPMODE),depmode=gcc3)
 # Note a subtlety here: we use $(@D) for the directory part, to make
 # things like the go/%.o rule work properly; but we use $(*F) for the
 # file part, as we just want the file part of the stem, not the entire
@@ -1038,7 +1038,7 @@ COMPILE = $(COMPILE.base) -MT $@ -MMD -MP -MF $(@D)/$(DEPDIR)/$(*F).TPo
 POSTCOMPILE = @mv $(@D)/$(DEPDIR)/$(*F).TPo $(@D)/$(DEPDIR)/$(*F).Po
 else
 COMPILE = source='$<' object='$@' libtool=no \
-    DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) $(COMPILE.base)
+    DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) $(COMPILE.base)
 POSTCOMPILE =
 endif
 
diff --git a/gcc/configure b/gcc/configure
index 2ac0347..0ca79bd 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -735,7 +735,7 @@ LDEXP_LIB
 EXTRA_GCC_LIBS
 GNAT_LIBEXC
 COLLECT2_LIBS
-CCDEPMODE
+CXXDEPMODE
 DEPDIR
 am__leading_dot
 CXXCPP
@@ -8762,12 +8762,12 @@ ac_config_commands="$ac_config_commands depdir"
 ac_config_commands="$ac_config_commands gccdepdir"
 
 
-depcc="$CC"   am_compiler_list=
+depcc="$CXX"  am_compiler_list=
 
 am_depcomp=$ac_aux_dir/depcomp
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
 $as_echo_n "checking dependency style of $depcc... " >&6; }
-if test "${am_cv_CC_dependencies_compiler_type+set}" = set; then :
+if test "${am_cv_CXX_dependencies_compiler_type+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -f "$am_depcomp"; then
@@ -8789,7 +8789,7 @@ else
   # directory.
   mkdir sub
 
-  am_cv_CC_dependencies_compiler_type=none
+  am_cv_CXX_dependencies_compiler_type=none
   if test "$am_compiler_list" = ""; then
      am_compiler_list=`sed -n 's/^\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
   fi
@@ -8834,7 +8834,7 @@ else
       #   icc: Command line remark: option '-MP' not supported
       if (grep 'ignoring option' conftest.err ||
           grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
-        am_cv_CC_dependencies_compiler_type=$depmode
+        am_cv_CXX_dependencies_compiler_type=$depmode
 	$as_echo "$as_me:$LINENO: success" >&5
         break
       fi
@@ -8846,15 +8846,15 @@ else
   cd ..
   rm -rf conftest.dir
 else
-  am_cv_CC_dependencies_compiler_type=none
+  am_cv_CXX_dependencies_compiler_type=none
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
-$as_echo "$am_cv_CC_dependencies_compiler_type" >&6; }
-if test x${am_cv_CC_dependencies_compiler_type-none} = xnone
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CXX_dependencies_compiler_type" >&5
+$as_echo "$am_cv_CXX_dependencies_compiler_type" >&6; }
+if test x${am_cv_CXX_dependencies_compiler_type-none} = xnone
 then as_fn_error "no usable dependency style found" "$LINENO" 5
-else CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
+else CXXDEPMODE=depmode=$am_cv_CXX_dependencies_compiler_type
 
 fi
 


-- 
      Jan-Benedict Glaw      jbglaw@lug-owl.de              +49-172-7608481
Signature of:                 Gib Dein Bestes. Dann übertriff Dich selbst!
the second  :
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