* shlib-versions [USE_IN_LIBIO] (.*-.*-gnu-gnu*): Set earliest

	supported version for libc 0.2.90.libio to GLIBC_2.2.

	* Makeconfig (soversions.mk): Grok new third column in shlib-versions,
	and use it to emit new variable `map-firstversions'.
	* scripts/firstversions.awk: New file.
	* Makerules (Versions.all): Use scripts/firstversions.awk and
	the $(map-firstversions) value to generate a modified versions list
	that includes renames in "A = B" syntax for each version set earlier
	than the "earliest symbol version" named in shlib-versions.
	* scripts/versions.awk: Recognize "A = B" lines in the input to mean
	rename version set A to B in the output to the intermediate file.
	* scripts/abi-versions.awk: New file.
	* Makerules (abi-versions.h): New target, generated by that script.
	[$(versioning) = yes] (before-compile): Prepend abi-versions.h.
	* include/shlib-compat.h: New file, uses that generated header.

1 files changed, 3 insertions, 3 deletions

diff --git a/shlib-versions b/shlib-versions
index abf2fd49de..f907bc7eee 100644
--- a/shlib-versions
+++ b/shlib-versions
@@ -8,8 +8,8 @@
 # This file can use cpp-style conditionals starting with % instead of #
 # to test the symbols defined in config.h by configure.
 
-# Configuration		Library versions
-# -------------		------- --------
+# Configuration		Library=version		Earliest symbol set (optional)
+# -------------		---------------		------------------------------
 
 # The interface to -lm depends mostly only on cpu, not on operating system.
 i.86-.*-.*		libm=6
@@ -33,7 +33,7 @@ alpha.*-.*-linux.*	libc=6.1
 
 # libc.so.0.2 is for the Hurd alpha release 0.2.
 %ifdef USE_IN_LIBIO /* experimental only! */
-.*-.*-gnu-gnu*		libc=0.2.90.libio
+.*-.*-gnu-gnu*		libc=0.2.90.libio	GLIBC_2.2
 %else
 .*-.*-gnu-gnu*		libc=0.2
 %endif