libgo: add AIX FAT libraries support

AIX-style libraries contains both 32 and 64 bit shared objects.
This patch follows the adding of FAT libraries support in other gcc
libraries (libgcc, listdc++, etc).

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/242957

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-2d105e65cca6b536320284273353b7c640b12c5f
+587d4595e446c597efe97ccdc81b2f05cbc04a21
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/Makefile.am

@@ -1228,3 +1228,17 @@ distclean-local:
 	find . -name '*.lo.dep' -print | xargs rm -f
 
 include $(top_srcdir)/../multilib.am
+
+if LIBGO_IS_AIX
+ALL_LOCAL_DEPS = add-aix-fat-library
+else
+ALL_LOCAL_DEPS =
+endif
+all-local: $(ALL_LOCAL_DEPS)
+
+MAJOR=$(firstword $(subst :, ,$(libtool_VERSION)))
+add-aix-fat-library: all-multi
+    @if test "$(MULTIBUILDTOP)" = ""; then \
+        ${AR} -X$(AIX_DEFAULT_ARCH) rc .libs/$(PACKAGE).a ../ppc$(AIX_DEFAULT_ARCH)/$(PACKAGE)/.libs/$(PACKAGE).so.$(MAJOR); \
+        ${AR} -X$(AIX_DEFAULT_ARCH) rc ../pthread/$(PACKAGE)/.libs/$(PACKAGE).a ../pthread/ppc$(AIX_DEFAULT_ARCH)/$(PACKAGE)/.libs/$(PACKAGE).so.$(MAJOR); \
+    fi

libgo/Makefile.in

@@ -377,6 +377,7 @@ CTAGS = ctags
 CSCOPE = cscope
 DIST_SUBDIRS = testsuite
 ACLOCAL = @ACLOCAL@
+AIX_DEFAULT_ARCH = @AIX_DEFAULT_ARCH@
 ALLGOARCH = @ALLGOARCH@
 ALLGOARCHFAMILY = @ALLGOARCHFAMILY@
 ALLGOOS = @ALLGOOS@
@@ -1160,6 +1161,9 @@ MULTIDIRS =
 MULTISUBDIR = 
 MULTIDO = true
 MULTICLEAN = true
+@LIBGO_IS_AIX_FALSE@ALL_LOCAL_DEPS = 
+@LIBGO_IS_AIX_TRUE@ALL_LOCAL_DEPS = add-aix-fat-library
+MAJOR = $(firstword $(subst :, ,$(libtool_VERSION)))
 all: config.h
 	$(MAKE) $(AM_MAKEFLAGS) all-recursive
 
@@ -3080,6 +3084,12 @@ mostlyclean-local: mostlyclean-multi
 clean-local: clean-multi
 distclean-local: distclean-multi
 maintainer-clean-local: maintainer-clean-multi
+all-local: $(ALL_LOCAL_DEPS)
+add-aix-fat-library: all-multi
+	@if test "$(MULTIBUILDTOP)" = ""; then \
+		${AR} -X$(AIX_DEFAULT_ARCH) rc .libs/$(PACKAGE).a ../ppc$(AIX_DEFAULT_ARCH)/$(PACKAGE)/.libs/$(PACKAGE).so.$(MAJOR); \
+		${AR} -X$(AIX_DEFAULT_ARCH) rc ../pthread/$(PACKAGE)/.libs/$(PACKAGE).a ../pthread/ppc$(AIX_DEFAULT_ARCH)/$(PACKAGE)/.libs/$(PACKAGE).so.$(MAJOR); \
+	fi
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.

libgo/configure

@@ -733,6 +733,7 @@ SED
 MAINT
 MAINTAINER_MODE_FALSE
 MAINTAINER_MODE_TRUE
+AIX_DEFAULT_ARCH
 am__fastdepCCAS_FALSE
 am__fastdepCCAS_TRUE
 CCASDEPMODE
@@ -4713,6 +4714,14 @@ case ${host} in
     # static hash tables crashes on AIX when libgo is built with O2
     CFLAGS="$CFLAGS -fno-section-anchors"
     GOCFLAGS="$GOCFLAGS -fno-section-anchors"
+
+    # Check default architecture for FAT library creation
+    if test -z "`$(CC) -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
+        AIX_DEFAULT_ARCH='64'
+    else
+        AIX_DEFAULT_ARCH='32'
+    fi
+
     ;;
 esac
 
@@ -11492,7 +11501,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11495 "configure"
+#line 11602 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11598,7 +11607,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11601 "configure"
+#line 11708 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H

libgo/configure.ac

@@ -36,6 +36,14 @@ case ${host} in
     # static hash tables crashes on AIX when libgo is built with O2
     CFLAGS="$CFLAGS -fno-section-anchors"
     GOCFLAGS="$GOCFLAGS -fno-section-anchors"
+
+    # Check default architecture for FAT library creation
+    if test -z "`$(CC) -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
+        AIX_DEFAULT_ARCH='64'
+    else
+        AIX_DEFAULT_ARCH='32'
+    fi
+    AC_SUBST(AIX_DEFAULT_ARCH)
     ;;
 esac
 

libgo/testsuite/Makefile.in

@@ -131,6 +131,7 @@ am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
 DEJATOOL = $(PACKAGE)
 RUNTESTDEFAULTFLAGS = --tool $$tool --srcdir $$srcdir
 ACLOCAL = @ACLOCAL@
+AIX_DEFAULT_ARCH = @AIX_DEFAULT_ARCH@
 ALLGOARCH = @ALLGOARCH@
 ALLGOARCHFAMILY = @ALLGOARCHFAMILY@
 ALLGOOS = @ALLGOOS@