From 1695c7737655241e1773bdddc93e82c22d8d1584 Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Tue, 4 Feb 2014 09:48:47 -0200
Subject: [PATCH] abilist-pattern configurability

This patch creates implicit rules to match the abifiles if
abilist-pattern is defined in the architecture Makefile. This allows
machine specific Makefiles to define different abifiles names
(for instance *-le.abilist for powerpc64le).
---
 ChangeLog                | 11 +++++++++++
 Makerules                | 32 ++++++++++++++++++++++++++++++++
 sysdeps/powerpc/Makefile |  4 ++++
 3 files changed, 47 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index f9f89fcc12..d9fa673bc0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2014-02-04  Roland McGrath  <roland@hack.frob.com>
+	    Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
+	* sysdeps/powerpc/Makefile [$(config-machine) ends with 'le']
+	(abilist-pattern): New variable, set to %-le.abilist.
+
+	* Makerules (abilist-pattern): New variable.
+	(vpath): Use $(abilist-pattern) in place of %.abilist.
+	(check-abi-% pattern rule): Likewise.
+	(check-abi, update-abi): Likewise.
+
 2014-02-04  Eric Wong  <normalperson@yhbt.net>
 
 	* sysdeps/x86_64/fpu/libm-test-ulps: Update.
diff --git a/Makerules b/Makerules
index b7e556ff5f..b46b09b369 100644
--- a/Makerules
+++ b/Makerules
@@ -1175,6 +1175,14 @@ ifeq ($(build-shared),yes)
 	LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
 	mv -f $@T $@
 
+# A sysdeps/.../Makefile can set abilist-pattern to something like
+# %-foo.abilist to look for libc-foo.abilist instead of libc.abilist.
+# This makes sense if multiple ABIs can be most cleanly supported by a
+# configuration without using separate sysdeps directories for each.
+ifdef abilist-pattern
+vpath $(abilist-pattern) $(+sysdep_dirs)
+endif
+
 vpath %.abilist $(+sysdep_dirs)
 
 # The .PRECIOUS rule prevents the files built by an implicit rule whose
@@ -1184,18 +1192,42 @@ vpath %.abilist $(+sysdep_dirs)
 .PRECIOUS: %.symlist
 generated += $(extra-libs:=.symlist)
 
+ifdef abilist-pattern
+check-abi-%: $(common-objpfx)config.make $(abilist-pattern) $(objpfx)%.symlist
+	$(check-abi-pattern)
+check-abi-%: $(common-objpfx)config.make $(abilist-pattern) \
+	     $(common-objpfx)%.symlist
+	$(check-abi-pattern)
+endif
 check-abi-%: $(common-objpfx)config.make %.abilist $(objpfx)%.symlist
 	$(check-abi)
 check-abi-%: $(common-objpfx)config.make %.abilist $(common-objpfx)%.symlist
 	$(check-abi)
+define check-abi-pattern
+	diff -p -U 0 $(filter $(abilist-pattern),$^) $(filter %.symlist,$^)
+endef
 define check-abi
 	diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^)
 endef
 
+ifdef abilist-pattern
+update-abi-%: $(objpfx)%.symlist $(abilist-pattern)
+	$(update-abi-pattern)
+update-abi-%: $(common-objpfx)%.symlist $(abilist-pattern)
+	$(update-abi-pattern)
+endif
 update-abi-%: $(objpfx)%.symlist %.abilist
 	$(update-abi)
 update-abi-%: $(common-objpfx)%.symlist %.abilist
 	$(update-abi)
+define update-abi-pattern
+@if cmp -s $^ 2> /dev/null; \
+ then \
+      echo '+++ $(filter $(abilist-pattern),$^) is unchanged'; \
+ else cp -f $^; \
+      echo '*** Now check $(filter $(abilist-pattern),$^) changes for correctness ***'; \
+ fi
+endef
 define update-abi
 @if cmp -s $^ 2> /dev/null; \
  then \
diff --git a/sysdeps/powerpc/Makefile b/sysdeps/powerpc/Makefile
index f75e62523c..b11edd77bd 100644
--- a/sysdeps/powerpc/Makefile
+++ b/sysdeps/powerpc/Makefile
@@ -27,3 +27,7 @@ ifeq ($(subdir),misc)
 sysdep_headers += sys/platform/ppc.h
 tests += test-gettimebase
 endif
+
+ifneq (,$(filter %le,$(config-machine)))
+abilist-pattern = %-le.abilist
+endif