* 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, 10 insertions, 3 deletions

diff --git a/scripts/versions.awk b/scripts/versions.awk
index 78ed73914b..086a963b25 100644
--- a/scripts/versions.awk
+++ b/scripts/versions.awk
@@ -16,7 +16,10 @@ BEGIN {
       libs[$1] = 1;
       curlib = $1;
       while (getline < defsfile && ! /^}/) {
-	versions[$1] = 1;
+        if ($2 == "=")
+	  renamed[$1] = $3;
+	else
+	  versions[$1] = 1;
       }
     }
   }
@@ -33,6 +36,7 @@ BEGIN {
 
 # This matches the beginning of the version information for a new library.
 /^[a-zA-Z0-9_.]+/ {
+  delete renamed;
   actlib = $1;
   if (!libs[$1]) {
     printf("no versions defined for %s\n", $1) > "/dev/stderr";
@@ -43,11 +47,14 @@ BEGIN {
 
 # This matches the beginning of a new version for the current library.
 /^  [A-Za-z_]/ {
-  actver = $1;
-  if (!versions[$1]) {
+  if (renamed[$1])
+    actver = renamed[$1];
+  else if (!versions[$1]) {
     printf("version %s not defined\n", $1) > "/dev/stderr";
     exit 1;
   }
+  else
+    actver = $1;
   next;
 }