From 0ab0291b84b45f2389a019af2c88bf5169d14f64 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Sat, 26 May 2012 10:46:59 -0700
Subject: Convert WORDSIZE[32|64]/ld entries to abi-variants

---
 Makeconfig | 56 +++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 45 insertions(+), 11 deletions(-)

(limited to 'Makeconfig')

diff --git a/Makeconfig b/Makeconfig
index b4b2963..df7545f 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -791,6 +791,24 @@ ifeq (yes, $(build-shared))
 	sed '/^[ 	]*#/d;/^[ 	]*$$/d' $< > $@T
 	mv -f $@T $@
 
+# To generate a header to support more than one ABI for different
+# architecture variants, the CPU/Makefile defines abi-variants to be a
+# list of names for those variants (e.g. 32 64), and, for each variant,
+# defines abi-$(variant)-condition to be the condition for those options
+# to use in a C #if condition.  abi-includes may be defined to a list of
+# headers to include in the generated header, if the default does not
+# suffice.
+
+ifdef abi-variants
+ifndef default-abi
+default-abi = $(firstword $(abi-variants))
+endif
+endif
+
+ifndef abi-includes
+abi-includes := bits/wordsize.h
+endif
+
 # Process the shlib-versions file, which tells us what shared library
 # version numbers to use when we install shared objects on this system.
 # We need to wait until $(subdirs) is complete.
@@ -816,24 +834,17 @@ $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
 	       -f $^ > $@T
 	mv -f $@T $@
 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
-	(seen_DEFAULT=0; seen_WORDSIZE32=0; seen_WORDSIZE64=0; \
-	 while read which lib number setname; do \
+	(while read which lib number setname; do \
 	   eval seen_$$which=1; \
 	   test x"$$which" != xABI || echo abi-name = "$$lib"; \
 	   test x"$$which" = xDEFAULT || continue; \
 	   case $$number in \
 	     [0-9]*) echo "$$lib.so-version=.$$number"; \
 		     echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
-	     *)	     echo "$$lib.so-version=$$number"; \
+	     *)	     echo "$$lib.so-version=\$$(if \$$(abi-$(default-abi)-$$lib-soname),\$$(abi-$(default-abi)-$$lib-soname),$$number)"; \
 		     echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
 	   esac; \
 	 done; \
-	 case "$$seen_DEFAULT$$seen_WORDSIZE32$$seen_WORDSIZE64" in \
-	   100) echo biarch = no;; \
-	   101) echo biarch = 32;; \
-	   ?1?) echo biarch = 64;; \
-	   *) echo >&2 BUG; exit 2;; \
-	 esac; \
 	 echo soversions.mk-done = t;) < $< > $@T; exit 0
 	mv -f $@T $@
 endif
@@ -850,8 +861,31 @@ $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
 				    $(common-objpfx)soversions.i
 	$(make-target-directory)
-	@rm -f ${@:stmp=T} $@
-	LC_ALL=C $(AWK) -f $^ > ${@:stmp=T}
+	{ \
+	 echo '/* This file is automatically generated.';\
+	 echo '   It defines macros to allow user program to find the shared'; \
+	 echo '   library files which come as part of GNU libc.  */'; \
+	 echo '#ifndef __GNU_LIB_NAMES_H'; \
+	 echo '#define __GNU_LIB_NAMES_H	1'; \
+	 echo ''; \
+	 $(if $(abi-includes), \
+	  $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
+	  echo '';) \
+	 $(if $(abi-variants), \
+	 $(foreach v,$(abi-variants),\
+	 $(if $(abi-$(v)-condition),\
+	 echo '#if $(abi-$(v)-condition)'; \
+	 ($(foreach s,$(all-sonames), \
+	   $(if $(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname),\
+	     echo $(firstword $(subst =, ,$(s)))=$(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname);, \
+	     echo $(s);))) \
+	 | LC_ALL=C $(AWK) -v multi=1 -f $(firstword $^) | LC_ALL=C sort;) \
+	 $(if $(abi-$(v)-condition),echo '#endif';)), \
+	 ($(foreach s,$(all-sonames), echo $(s);)) \
+	 | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort;) \
+	 echo ''; \
+	 echo '#endif	/* gnu/lib-names.h */'; \
+	} >  ${@:stmp=T}
 	$(move-if-change) ${@:stmp=T} ${@:stmp=h}
 	touch $@
 endif
-- 
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