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In order to ensure ABI compatibility between staged builds it was
required that rtkaio/Makefile define both IN_MODULE=MODULE_librt
and IS_IN_librt in order to get both the right set of versioned
symbols and enable cancellation correctly. The changes to rtkaio/Makefile
are Red Hat internal changes.
commit 286663c34b006c1409df4a71f89d6d4d5d01df09
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Wed Nov 19 12:15:01 2014 +0530
Fix -Wundef warning in SHLIB_COMPAT
Replace the IS_IN_##lib with IS_IN(lib). Verified that the generated
code remains the same.
* include/shlib-compat.h (_SHLIB_COMPAT): Use IS_IN.
Index: glibc-2.17-c758a686/include/shlib-compat.h
===================================================================
--- glibc-2.17-c758a686.orig/include/shlib-compat.h
+++ glibc-2.17-c758a686/include/shlib-compat.h
@@ -45,7 +45,7 @@
# define SHLIB_COMPAT(lib, introduced, obsoleted) \
_SHLIB_COMPAT (lib, introduced, obsoleted)
# define _SHLIB_COMPAT(lib, introduced, obsoleted) \
- ((IS_IN_##lib - 0) \
+ (IS_IN (lib) \
&& (!(ABI_##lib##_##obsoleted - 0) \
|| ((ABI_##lib##_##introduced - 0) < (ABI_##lib##_##obsoleted - 0))))
Index: glibc-2.17-c758a686/rtkaio/Makefile
===================================================================
--- glibc-2.17-c758a686.orig/rtkaio/Makefile
+++ glibc-2.17-c758a686/rtkaio/Makefile
@@ -69,7 +69,8 @@ CFLAGS-kaio_librt-cancellation.c = -fasy
LDFLAGS-rtkaio.so = -Wl,-soname=lib$(libprefix)rt.so$(librt.so-version) \
-Wl,--enable-new-dtags,-z,nodelete
-CPPFLAGS-librtkaio += -DIS_IN_librt=1 -I$(..)rt
+CPPFLAGS-librtkaio += -UIN_MODULE -DIN_MODULE=MODULE_librt \
+ -UIS_IN_librt -DIS_IN_librt=1 -I$(..)rt
rpath-dirs := $(patsubst rt,rtkaio,$(rpath-dirs))