[PATCH v2 4/4] lttng-tools: Remove the scope resolution operator with musl

[<mingli.yu@eng.windriver.com>]

From: Mingli Yu <mingli.yu@windriver.com>

Remove the scope resolution operator :: in musl build to fix the below
build failure.
 | ../../../sources/lttng-tools-2.14.0/src/common/eventfd.cpp:18:31: error: expected id-expression before numeric constant
 |    18 |                 int flags = ::EFD_CLOEXEC;
 |       |                               ^~~~~~~~~~~
 | ../../../sources/lttng-tools-2.14.0/src/common/eventfd.cpp:21:36: error: expected id-expression before numeric constant
 |    21 |                         flags |= ::EFD_SEMAPHORE;
 |       |

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
---
 ...Remove-the-scope-resolution-operator.patch | 41 +++++++++++++++++++
 .../lttng/lttng-tools_2.14.0.bb               |  2 +
 2 files changed, 43 insertions(+)
 create mode 100644 meta/recipes-kernel/lttng/lttng-tools/0001-eventfd.cpp-Remove-the-scope-resolution-operator.patch

diff --git a/meta/recipes-kernel/lttng/lttng-tools/0001-eventfd.cpp-Remove-the-scope-resolution-operator.patch b/meta/recipes-kernel/lttng/lttng-tools/0001-eventfd.cpp-Remove-the-scope-resolution-operator.patch
new file mode 100644
index 00000000000..dac5002f097
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-tools/0001-eventfd.cpp-Remove-the-scope-resolution-operator.patch
@@ -0,0 +1,41 @@
+From da83d31a8dd555c28eb27bd7a7d3c53b51d5f276 Mon Sep 17 00:00:00 2001
+From: Mingli Yu <mingli.yu@windriver.com>
+Date: Sun, 20 Jul 2025 16:37:57 +0800
+Subject: [PATCH] eventfd.cpp: Remove the scope resolution operator
+
+Remove the scope resolution operator :: to fix the below build failure
+with musl.
+ | ../../../sources/lttng-tools-2.14.0/src/common/eventfd.cpp:18:31: error: expected id-expression before numeric constant
+ |    18 |                 int flags = ::EFD_CLOEXEC;
+ |       |                               ^~~~~~~~~~~
+ | ../../../sources/lttng-tools-2.14.0/src/common/eventfd.cpp:21:36: error: expected id-expression before numeric constant
+ |    21 |                         flags |= ::EFD_SEMAPHORE;
+ |       |                                    ^~~~~~~~~~~~~
+
+Upstream-Status: Pending
+
+Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
+---
+ src/common/eventfd.cpp | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/common/eventfd.cpp b/src/common/eventfd.cpp
+index fe5b549..3379b0b 100644
+--- a/src/common/eventfd.cpp
++++ b/src/common/eventfd.cpp
+@@ -15,10 +15,10 @@
+ 
+ lttng::eventfd::eventfd(bool use_semaphore_semantics, std::uint64_t initial_value) :
+ 	file_descriptor([use_semaphore_semantics, initial_value]() {
+-		int flags = ::EFD_CLOEXEC;
++		int flags = EFD_CLOEXEC;
+ 
+ 		if (use_semaphore_semantics) {
+-			flags |= ::EFD_SEMAPHORE;
++			flags |= EFD_SEMAPHORE;
+ 		}
+ 
+ 		const auto raw_fd = ::eventfd(initial_value, flags);
+-- 
+2.34.1
+
diff --git a/meta/recipes-kernel/lttng/lttng-tools_2.14.0.bb b/meta/recipes-kernel/lttng/lttng-tools_2.14.0.bb
index da3bdd4052f..989c963c1f8 100644
--- a/meta/recipes-kernel/lttng/lttng-tools_2.14.0.bb
+++ b/meta/recipes-kernel/lttng/lttng-tools_2.14.0.bb
@@ -48,6 +48,8 @@ SRC_URI = "https://lttng.org/files/lttng-tools/lttng-tools-${PV}.tar.bz2 \
            file://0001-gen-ust-events-constructor-change-rpath-to-libdir-li.patch \
            "
 
+SRC_URI:append:libc-musl = " file://0001-eventfd.cpp-Remove-the-scope-resolution-operator.patch"
+
 SRC_URI[sha256sum] = "d8c39c26cec13b7bd82551cd52a22efc358b888e36ebcf9c1b60ef1c3a3c2fd3"
 
 inherit autotools ptest pkgconfig useradd python3-dir manpages systemd
-- 
2.34.1