libstdc++: Add script to update docs for a new release branch

This should be run on a release branch after branching from trunk.
Various links and references to trunk in the docs will be updated to
refer to the new release branch.

libstdc++-v3/ChangeLog:

	* scripts/update_release_branch.sh: New file.

diff --git a/libstdc++-v3/scripts/update_release_branch.sh b/libstdc++-v3/scripts/update_release_branch.sh
new file mode 100755 (executable)
index 0000000..f8109ed
--- /dev/null
+++ b/libstdc++-v3/scripts/update_release_branch.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# This should be run on a release branch after branching from trunk.
+# Various links and references to trunk in the docs will be updated to
+# refer to the new release branch.
+
+# The major version of the new release branch.
+major=$1
+(($major)) || { echo "$0: Integer argument expected" >& 2 ; exit 1; }
+
+# This assumes GNU sed
+sed -i "s@^mainline GCC, not in any particular major.\$@the GCC ${major} series.@" doc/xml/manual/status_cxx*.xml
+sed -i 's@https://gcc.gnu.org/cgit/gcc/tree/libstdc++-v3/testsuite/[^"]\+@&?h=releases%2Fgcc-'${major}@ doc/xml/manual/allocator.xml doc/xml/manual/mt_allocator.xml
+sed -i "s@https://gcc.gnu.org/onlinedocs/gcc/Invoking-GCC.html@https://gcc.gnu.org/onlinedocs/gcc-${major}.1.0/gcc/Invoking-GCC.html@" doc/xml/manual/using.xml