CMake: Generate and use a wrapper script for stripping binaries

MinGW 11.2.0 comes with a strip.exe that strips the ".gnu_debuglink"
section in binaries, a section that is needed for the separate debug
information feature.

binutils version 2.34 mentions the feature for the first time:
https://sourceware.org/binutils/docs-2.34/binutils/strip.html#strip

To ensure the debuglink section is preserved, generate a shell wrapper
that calls the original strip binary with an extra option to keep the
required section.

To determine if the option is supported, we build a real shared library
on which strip will be called with the --keep-section option.
If the option is not supported, a wrapper is not generated and the
stock strip binary is used.

This logic only applies when targeting Linux and MinGW + a shared
library Qt. For other targets, the stock strip binary is used.

Developers can opt out of this logic by passing
-DQT_NO_STRIP_WRAPPER=TRUE when configuring each Qt repo.

Fixes: QTBUG-101653
Change-Id: Idd213d48d087d3c9600c853362aebaba348cde33
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
(cherry picked from commit 39f657032b5e65bfcb93472201f6607c0388ba37)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

2 files changed, 5 insertions, 0 deletions

diff --git a/libexec/qt-internal-strip.bat.in b/libexec/qt-internal-strip.bat.in
new file mode 100644
index 0000000000..4ab365ce6e
--- /dev/null
+++ b/libexec/qt-internal-strip.bat.in
@@ -0,0 +1 @@
+@original_strip@ @strip_arguments@ %*
diff --git a/libexec/qt-internal-strip.in b/libexec/qt-internal-strip.in
new file mode 100755
index 0000000000..bc75a976aa
--- /dev/null
+++ b/libexec/qt-internal-strip.in
@@ -0,0 +1,4 @@
+#!/bin/sh
+# echo the invoked command
+set -x
+@original_strip@ @strip_arguments@ "$@"