abseil-cpp: Do not leak -Wnon-virtual-dtor into the .pc files

The -Wnon-virtual-dtor flag was unintentionally added to the .pc files,
which causes problems when abseil is used by C code:

  cc1: error: command-line option '-Wnon-virtual-dtor' is valid for
  C++/ObjC++ but not for C [-Werror]

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 31 insertions, 0 deletions

diff --git a/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp/0005-Don-t-match-Wnon-virtual-dtor-in-the-flags-are-neede.patch b/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp/0005-Don-t-match-Wnon-virtual-dtor-in-the-flags-are-neede.patch
new file mode 100644
index 0000000000..9a4fc0b43f
--- /dev/null
+++ b/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp/0005-Don-t-match-Wnon-virtual-dtor-in-the-flags-are-neede.patch
@@ -0,0 +1,30 @@
+From 9cb5e5d15c142e5cc43a2c1db87c8e4e5b6d38a5 Mon Sep 17 00:00:00 2001
+From: Derek Mauro <dmauro@google.com>
+Date: Mon, 5 Aug 2024 07:35:05 -0700
+Subject: [PATCH] Don't match -Wnon-virtual-dtor in the "flags are needed to
+ suppress warnings in headers". It should fall through to the "don't impose
+ our warnings on others" case. Do this by matching on "-Wno-*" instead of
+ "-Wno*".
+
+Fixes #1737
+
+PiperOrigin-RevId: 659548798
+Change-Id: I49d7ba7ddcd7be30f946fca90ba9be467181e854
+Upstream-Status: Backport [https://github.com/abseil/abseil-cpp/commit/9cb5e5d15c142e5cc43a2c1db87c8e4e5b6d38a5]
+---
+ CMake/AbseilHelpers.cmake | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
+index b177e590..3c4c92fe 100644
+--- a/CMake/AbseilHelpers.cmake
++++ b/CMake/AbseilHelpers.cmake
+@@ -195,7 +195,7 @@ function(absl_cc_library)
+         # specified platform. Filter both of them out before the successor
+         # reaches the "^-m" filter.
+         set(skip_next_cflag ON)
+-      elseif(${cflag} MATCHES "^(-Wno|/wd)")
++      elseif(${cflag} MATCHES "^(-Wno-|/wd)")
+         # These flags are needed to suppress warnings that might fire in our headers.
+         set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
+       elseif(${cflag} MATCHES "^(-W|/w[1234eo])")
diff --git a/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20240722.0.bb b/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20240722.0.bb
index f44a5d9082..d9634b2b04 100644
--- a/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20240722.0.bb
+++ b/meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_20240722.0.bb
@@ -14,6 +14,7 @@ SRC_URI = "git://github.com/abseil/abseil-cpp;branch=${BRANCH};protocol=https \
            file://0002-Remove-maes-option-from-cross-compilation.patch \
            file://0003-Remove-neon-option-from-cross-compilation.patch \
            file://0004-abseil-ppc-fixes.patch \
+           file://0005-Don-t-match-Wnon-virtual-dtor-in-the-flags-are-neede.patch \
           "
 
 S = "${WORKDIR}/git"