Enable Go for AIX

Enable Go for AIX

[REIX, Tony]

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Description:
This patch enables libffi, libgo, and Go to be built on AIX.
It is the first patch of a series of patches for Go on AIX.
Do not use --enable-languages=go on AIX till all patches (FSF and Google) are available.

Tests (done with a .spec file):
 * AIX 7.2/PowerPC:
   - ./configure --enable-languages=go ... ; gmake : failed while building Go, as expected.
   - ./configure (without go language) ; gmake : SUCCESS.
 * Ubuntu/x86_64 :
   - ./configure --disable-multilib --enable-languages=go ... ; make :
   Build broke at 74%, after libgo has been successfully built, due to a lack of disk space.

ChangeLog:
        * configure.ac: Enable Go for AIX.
        * contrib/config-list.mk: Enable Go for AIX.

Cordialement,

Tony Reix

Bull - ATOS
IBM Coop Architect & Technical Leader
Office : +33 (0) 4 76 29 72 67
1 rue de Provence - 38432 Échirolles - France
www.atos.net

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--- ./configure.ac.ORIGIN	2017-04-19 15:31:23 -0500
+++ ./configure.ac	2017-04-19 15:38:59 -0500
@@ -790,10 +790,6 @@ case "${target}" in
   mmix-*-*)
     noconfigdirs="$noconfigdirs target-libffi"
     ;;
-  powerpc-*-aix*)
-    # copied from rs6000-*-* entry
-    noconfigdirs="$noconfigdirs target-libffi"
-    ;;
   rs6000-*-aix*)
     noconfigdirs="$noconfigdirs target-libffi"
     ;;
@@ -808,7 +804,7 @@ esac
 # Disable the go frontend on systems where it is known to not work. Please keep
 # this in sync with contrib/config-list.mk.
 case "${target}" in
-*-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix*)
+*-*-darwin* | *-*-cygwin* | *-*-mingw* | rs6000-*-aix*)
     unsupported_languages="$unsupported_languages go"
     ;;
 esac
@@ -824,7 +820,7 @@ if test x$enable_libgo = x; then
     *-*-cygwin* | *-*-mingw*)
 	noconfigdirs="$noconfigdirs target-libgo"
 	;;
-    *-*-aix*)
+    rs6000-*-aix*)
 	noconfigdirs="$noconfigdirs target-libgo"
 	;;
     esac
--- ./contrib/config-list.mk.ORIGIN	2017-04-19 15:39:40 -0500
+++ ./contrib/config-list.mk	2017-04-19 15:42:10 -0500
@@ -121,7 +121,7 @@ $(LIST): make-log-dir
 		TGT=`echo $@ | awk 'BEGIN { FS = "OPT" }; { print $$1 }'` &&			\
 		TGT=`$(GCC_SRC_DIR)/config.sub $$TGT` &&					\
 		case $$TGT in									\
-			*-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix*)			\
+			*-*-darwin* | *-*-cygwin* | *-*-mingw* | rs6000-*-aix*)			\
 				ADDITIONAL_LANGUAGES="";					\
 				;;								\
 			*)									\

Re: Enable Go for AIX

[David Edelsohn]

Hi, Tony

Why is enabling Go the *first* patch?  It seems that the support
should be added before one allows it to be configured.

Also, what are you trying to accomplish with the changes to "rs6000"
in the target triplets.  I think that you are trying to distinguish
between different versions of AIX?  Changing "rs6000" is not the
correct way to distinguish this.

What are you really trying to distinguish with this change?

Thanks, David