1 files changed, 63 insertions, 0 deletions
diff --git a/Makerules b/Makerules
index 12d01eed7c..3951bb185b 100644
--- a/Makerules
+++ b/Makerules
@@ -1324,6 +1324,69 @@ 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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