BZ#17496: Fix gnu/lib-names.h dependency.

2 files changed, 75 insertions, 64 deletions

diff --git a/ChangeLog b/ChangeLog
index d65c7193ed..2f7e6f62b5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2014-10-31  Roland McGrath  <roland@hack.frob.com>
+
+	[BZ #17496]
+	* Makerules: Move gnu/lib-names.h generation chunk up, to right after
+	gen-as-const-headers chunk.  Add a big scare comment after the last
+	safe place to touch before-compile.
+
 2014-10-31  Joseph Myers  <joseph@codesourcery.com>
 
 	* manual/install.texi (Tools for Compilation): Update autoconf
diff --git a/Makerules b/Makerules
index 3951bb185b..4f2eec35bc 100644
--- a/Makerules
+++ b/Makerules
@@ -211,6 +211,73 @@ $(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
 	mv -f $@T $@
 endif
 
+ifeq (yes,$(build-shared))
+# Generate the header containing the names of all shared libraries.
+# We use a stamp file to avoid unnecessary recompilations.
+before-compile += $(common-objpfx)gnu/lib-names.h
+ifeq ($(soversions.mk-done),t)
+ifndef abi-variants
+lib-names-h-abi = gnu/lib-names.h
+lib-names-stmp-abi = gnu/lib-names.stmp
+else
+lib-names-h-abi = gnu/lib-names-$(default-abi).h
+lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
+before-compile += $(common-objpfx)$(lib-names-h-abi)
+common-generated += gnu/lib-names.h
+install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
+$(common-objpfx)gnu/lib-names.h:
+	$(make-target-directory)
+	{ \
+	 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 '';) \
+	 $(foreach v,$(abi-variants),\
+	 $(if $(abi-$(v)-condition),\
+	 echo '#if $(abi-$(v)-condition)'; \
+	 echo '# include <gnu/lib-names-$(v).h>'); \
+	 $(if $(abi-$(v)-condition),echo '#endif';)) \
+	 echo ''; \
+	 echo '#endif	/* gnu/lib-names.h */'; \
+	} >  $@
+endif
+$(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
+$(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
+				       $(common-objpfx)soversions.i
+	$(make-target-directory)
+	{ \
+	 $(if $(abi-variants), \
+	 echo '/* This file is automatically generated.  */';\
+	 echo '#ifndef __GNU_LIB_NAMES_H'; \
+	 echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
+	 echo '#endif';, \
+	 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 ''; \
+	 ($(foreach s,$(all-sonames), echo $(s);)) \
+	 | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
+	 $(if $(abi-variants),, \
+	 echo ''; \
+	 echo '#endif	/* gnu/lib-names.h */';) \
+	} >  ${@:stmp=T}
+	$(move-if-change) ${@:stmp=T} ${@:stmp=h}
+	touch $@
+endif
+common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
+endif
+
+###############################################################################
+# NOTE!  Everything adding to before-compile needs to come before this point! #
+###############################################################################
+
 # Generate an ordered list of implicit rules which find the source files in
 # each sysdep directory.  The old method was to use vpath to search all the
 # sysdep directories.  However, that had the problem that a .S file in a
@@ -1276,7 +1343,7 @@ endif
 endif
 
 endif
-
+
 # These will have been set by sysdeps/posix/Makefile.
 L_tmpnam  ?= 1
 TMP_MAX   ?= 0
@@ -1324,69 +1391,6 @@ ifndef no_deps
 -include $(stdio_lim:h=d)
 endif
 common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
-
-ifeq (yes,$(build-shared))
-# Generate the header containing the names of all shared libraries.
-# We use a stamp file to avoid unnecessary recompilations.
-before-compile += $(common-objpfx)gnu/lib-names.h
-ifeq ($(soversions.mk-done),t)
-ifndef abi-variants
-lib-names-h-abi = gnu/lib-names.h
-lib-names-stmp-abi = gnu/lib-names.stmp
-else
-lib-names-h-abi = gnu/lib-names-$(default-abi).h
-lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
-before-compile += $(common-objpfx)$(lib-names-h-abi)
-common-generated += gnu/lib-names.h
-install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
-$(common-objpfx)gnu/lib-names.h:
-	$(make-target-directory)
-	{ \
-	 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 '';) \
-	 $(foreach v,$(abi-variants),\
-	 $(if $(abi-$(v)-condition),\
-	 echo '#if $(abi-$(v)-condition)'; \
-	 echo '# include <gnu/lib-names-$(v).h>'); \
-	 $(if $(abi-$(v)-condition),echo '#endif';)) \
-	 echo ''; \
-	 echo '#endif	/* gnu/lib-names.h */'; \
-	} >  $@
-endif
-$(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
-$(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
-				       $(common-objpfx)soversions.i
-	$(make-target-directory)
-	{ \
-	 $(if $(abi-variants), \
-	 echo '/* This file is automatically generated.  */';\
-	 echo '#ifndef __GNU_LIB_NAMES_H'; \
-	 echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
-	 echo '#endif';, \
-	 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 ''; \
-	 ($(foreach s,$(all-sonames), echo $(s);)) \
-	 | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
-	 $(if $(abi-variants),, \
-	 echo ''; \
-	 echo '#endif	/* gnu/lib-names.h */';) \
-	} >  ${@:stmp=T}
-	$(move-if-change) ${@:stmp=T} ${@:stmp=h}
-	touch $@
-endif
-common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
-endif
 
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