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