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diff --git a/Makefile.all.am b/Makefile.all.am
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index 3786e34..1befef5 100644
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--- a/Makefile.all.am
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+++ b/Makefile.all.am
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@@ -50,20 +50,20 @@ inplace-noinst_DSYMS: build-noinst_DSYMS
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 	done
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 # This is used by coregrind/Makefile.am and by <tool>/Makefile.am for doing
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-# "make install".  It copies $(noinst_PROGRAMS) into $prefix/lib/valgrind/.
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+# "make install".  It copies $(noinst_PROGRAMS) into $prefix/libexec/valgrind/.
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 # It needs to be depended on by an 'install-exec-local' rule.
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 install-noinst_PROGRAMS: $(noinst_PROGRAMS)
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-	$(mkinstalldirs) $(DESTDIR)$(pkglibdir); \
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+	$(mkinstalldirs) $(DESTDIR)$(pkglibexecdir); \
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 	for f in $(noinst_PROGRAMS); do \
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-	  $(INSTALL_PROGRAM) $$f $(DESTDIR)$(pkglibdir); \
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+	  $(INSTALL_PROGRAM) $$f $(DESTDIR)$(pkglibexecdir); \
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 	done
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 # This is used by coregrind/Makefile.am and by <tool>/Makefile.am for doing
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-# "make uninstall".  It removes $(noinst_PROGRAMS) from $prefix/lib/valgrind/.
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+# "make uninstall".  It removes $(noinst_PROGRAMS) from $prefix/libexec/valgrind/.
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 # It needs to be depended on by an 'uninstall-local' rule.
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 uninstall-noinst_PROGRAMS:
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 	for f in $(noinst_PROGRAMS); do \
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-	  rm -f $(DESTDIR)$(pkglibdir)/$$f; \
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+	  rm -f $(DESTDIR)$(pkglibexecdir)/$$f; \
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 	done
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 # Similar to install-noinst_PROGRAMS.
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@@ -71,15 +71,15 @@ uninstall-noinst_PROGRAMS:
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 # directories.  XXX: not sure whether the resulting permissions will be
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 # correct when using 'cp -R'...
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 install-noinst_DSYMS: build-noinst_DSYMS
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-	$(mkinstalldirs) $(DESTDIR)$(pkglibdir); \
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+	$(mkinstalldirs) $(DESTDIR)$(pkglibexecdir); \
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 	for f in $(noinst_DSYMS); do \
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-	  cp -R $$f.dSYM $(DESTDIR)$(pkglibdir); \
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+	  cp -R $$f.dSYM $(DESTDIR)$(pkglibexecdir); \
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 	done
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 # Similar to uninstall-noinst_PROGRAMS.
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 uninstall-noinst_DSYMS:
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 	for f in $(noinst_DSYMS); do \
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-	  rm -f $(DESTDIR)$(pkglibdir)/$$f.dSYM; \
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+	  rm -f $(DESTDIR)$(pkglibexecdir)/$$f.dSYM; \
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 	done
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 # This needs to be depended on by a 'clean-local' rule.
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diff --git a/Makefile.am b/Makefile.am
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index 242b38a..3b7c806 100644
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--- a/Makefile.am
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+++ b/Makefile.am
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@@ -58,7 +58,7 @@ DEFAULT_SUPP_FILES = @DEFAULT_SUPP@
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 # default.supp, as it is built from the base .supp files at compile-time.
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 dist_noinst_DATA = $(SUPP_FILES)
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-vglibdir = $(pkglibdir)
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+vglibdir = $(pkglibexecdir)
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 vglib_DATA = default.supp
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 pkgconfigdir = $(libdir)/pkgconfig
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diff --git a/coregrind/Makefile.am b/coregrind/Makefile.am
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index 94030fd..f09763a 100644
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--- a/coregrind/Makefile.am
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+++ b/coregrind/Makefile.am
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@@ -11,12 +11,12 @@ include $(top_srcdir)/Makefile.all.am
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 AM_CPPFLAGS_@VGCONF_PLATFORM_PRI_CAPS@ += \
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 	-I$(top_srcdir)/coregrind \
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-	-DVG_LIBDIR="\"$(pkglibdir)"\" \
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+	-DVG_LIBDIR="\"$(pkglibexecdir)"\" \
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 	-DVG_PLATFORM="\"@VGCONF_ARCH_PRI@-@VGCONF_OS@\""
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 if VGCONF_HAVE_PLATFORM_SEC
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 AM_CPPFLAGS_@VGCONF_PLATFORM_SEC_CAPS@ += \
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 	-I$(top_srcdir)/coregrind \
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-	-DVG_LIBDIR="\"$(pkglibdir)"\" \
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+	-DVG_LIBDIR="\"$(pkglibexecdir)"\" \
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 	-DVG_PLATFORM="\"@VGCONF_ARCH_SEC@-@VGCONF_OS@\""
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 endif
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@@ -714,7 +714,7 @@ GDBSERVER_XML_FILES = \
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 	m_gdbserver/mips64-fpu.xml
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 # so as to make sure these get copied into the install tree
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-vglibdir = $(pkglibdir)
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+vglibdir = $(pkglibexecdir)
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 vglib_DATA  = $(GDBSERVER_XML_FILES)
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 # so as to make sure these get copied into the tarball
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diff --git a/mpi/Makefile.am b/mpi/Makefile.am
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index 7ad9a25..471fee0 100644
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--- a/mpi/Makefile.am
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+++ b/mpi/Makefile.am
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@@ -18,16 +18,18 @@ EXTRA_DIST = \
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 # libmpiwrap-<platform>.so
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 #----------------------------------------------------------------------------
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-noinst_PROGRAMS  =
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+# These are really real libraries, so they should go to libdir, not libexec.
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+mpidir = $(pkglibdir)
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+mpi_PROGRAMS  =
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 if BUILD_MPIWRAP_PRI
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-noinst_PROGRAMS += libmpiwrap-@VGCONF_ARCH_PRI@-@VGCONF_OS@.so
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+mpi_PROGRAMS += libmpiwrap-@VGCONF_ARCH_PRI@-@VGCONF_OS@.so
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 endif
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 if BUILD_MPIWRAP_SEC
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-noinst_PROGRAMS += libmpiwrap-@VGCONF_ARCH_SEC@-@VGCONF_OS@.so
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+mpi_PROGRAMS += libmpiwrap-@VGCONF_ARCH_SEC@-@VGCONF_OS@.so
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 endif
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 if VGCONF_OS_IS_DARWIN
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-noinst_DSYMS = $(noinst_PROGRAMS)
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+mpi_DSYMS = $(mpi_PROGRAMS)
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 endif
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