package/libabseil-cpp: require wchar

PATCH Applied Michael Nosthoff via buildroot 1 participant 3 messages Oct 14 – Oct 30

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Michael Nosthoff via buildroot

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2026-10-14 19:56 UTC #0 lore raw

PATCH v3 1/1 package/libabseil-cpp: require wchar

absl::StrFormat() unconditionally includes <cwchar>. So a toolchain with wchar support is required.

This was introduced to abseil in [0] and landed in buildroot with the bump to 20240722.0.

[0] https://github.com/abseil/abseil-cpp/commit/5dc2cc1a6a992e09d9cf930cdce7984640e2b7e0

Fixes:
https://autobuild.buildroot.org/results/948/948463b01ce52456179b06ae17d4ace9a823f92b//

Fixes 0d40b47866 ("package/libabseil-cpp: bump to version 20240722.0")

Assisted-by Github Copilot:GPT-6 Luna

Signed-off-by Michael Nosthoff <[email protected]>

---

V3: add Fixes with commit that introduced the issue to buildroot.

V2: - moved the depends from ARCH_SUPPORT directly on the symbol.
- propagate that dependency to packages
- update comment

---
 package/collectd/Config.in                    | 6 ++++--
 package/falcosecurity-libs/Config.in          | 1 +
 package/grpc/Config.in                        | 6 ++++--
 package/gstreamer1/gst1-plugins-bad/Config.in | 6 ++++--
 package/kismet/Config.in                      | 5 +++--
 package/libabseil-cpp/Config.in               | 5 +++--
 package/netdata/Config.in                     | 5 +++--
 package/protobuf/Config.in                    | 5 +++--
 package/re2/Config.in                         | 5 +++--
 package/sysdig/Config.in                      | 6 ++++--
 package/tensorflow-lite/Config.in             | 5 +++--
 package/usbguard/Config.in                    | 5 +++--
 package/webrtc-audio-processing/Config.in     | 6 ++++--
 13 files changed, 42 insertions(+), 24 deletions(-)

package/collectd/Config.in +4 -2

index 8df1f5fa9b..0b210c66a1 100644
@@ -694,13 +694,15 @@ config BR2_PACKAGE_COLLECTD_GRPC
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS # grpc -> protobuf
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # grpc -> libabseil-cpp
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS # grpc
+	depends on BR2_USE_WCHAR # grpc -> libabseil-cpp
 	select BR2_PACKAGE_GRPC
 	help
 	  Send/receive values using the gRPC protocol.
 
-comment "grpc needs a toolchain w/ C++, gcc >= 8"
+comment "grpc needs a toolchain w/ C++, wchar, gcc >= 8"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || BR2_TOOLCHAIN_HAS_ATOMIC
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_8
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_8 || \
+		!BR2_USE_WCHAR
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS # grpc

package/falcosecurity-libs/Config.in +1 -0

index 9d9cbd12aa..66ee55f101 100644
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_FALCOSECURITY_LIBS
 	bool
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS # grpc
+	depends on BR2_USE_WCHAR # grpc -> libabseil-cpp
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS # protobuf
 	depends on BR2_LINUX_KERNEL
 	depends on BR2_INSTALL_LIBSTDCPP # jsoncpp, protobuf, tbb

package/grpc/Config.in +4 -2

index bdb31fc899..754ae16fea 100644
@@ -7,6 +7,7 @@ config BR2_PACKAGE_GRPC
 	depends on !BR2_STATIC_LIBS # protobuf, libabseil-cpp, re2
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || BR2_TOOLCHAIN_HAS_ATOMIC
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR # libabseil-cpp
 	select BR2_PACKAGE_C_ARES
 	select BR2_PACKAGE_LIBABSEIL_CPP
 	select BR2_PACKAGE_OPENSSL

@@ -19,9 +20,10 @@ config BR2_PACKAGE_GRPC
 
 	  http://github.com/grpc/grpc
 
-comment "grpc needs a toolchain w/ C++, threads, dynamic library, gcc >= 10"
+comment "grpc needs a toolchain w/ C++, threads, wchar, dynamic library, gcc >= 10"
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || BR2_TOOLCHAIN_HAS_ATOMIC
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS \
-		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 \
+		|| !BR2_USE_WCHAR
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS

package/gstreamer1/gst1-plugins-bad/Config.in +4 -2

index 0586b7f327..fd518c228d 100644
@@ -673,6 +673,7 @@ config BR2_PACKAGE_GST1_PLUGINS_BAD_PLUGIN_WEBRTCDSP
 	# All depends from webrtc-audio-processing
 	depends on BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR # libabseil-cpp
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10
 	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL

@@ -681,11 +682,12 @@ config BR2_PACKAGE_GST1_PLUGINS_BAD_PLUGIN_WEBRTCDSP
 	help
 	  WebRTC echo-cancellation, gain control and noise suppression
 
-comment "webrtcdsp needs a toolchain w/ C++, NPTL, dynamic library, gcc >= 10"
+comment "webrtcdsp needs a toolchain w/ C++, NPTL, wchar, dynamic library, gcc >= 10"
 	depends on BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS_NPTL \
-		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 \
+		|| !BR2_USE_WCHAR
 
 config BR2_PACKAGE_GST1_PLUGINS_BAD_PLUGIN_WPE
 	bool "wpe"

package/kismet/Config.in +3 -2

index 65c17baeaf..d03bf199f4 100644
@@ -34,6 +34,7 @@ if BR2_PACKAGE_KISMET
 config BR2_PACKAGE_KISMET_PYTHON_TOOLS
 	bool "Install python tools"
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS # protobuf
+	depends on BR2_USE_WCHAR # protobuf
 	depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS # python-numpy
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_8 # protobuf
 	depends on BR2_PACKAGE_PYTHON3

@@ -52,12 +53,12 @@ comment "python tools needs python3"
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
 
-comment "python tools needs a glibc or musl toolchain w/ dynamic library, gcc >= 8"
+comment "python tools needs a glibc or musl toolchain w/ wchar, dynamic library, gcc >= 8"
 	depends on BR2_STATIC_LIBS
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
 	depends on !(BR2_TOOLCHAIN_USES_GLIBC || BR2_TOOLCHAIN_USES_MUSL) || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_8
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_8 || !BR2_USE_WCHAR
 
 config BR2_PACKAGE_KISMET_SERVER
 	bool "Install server"

package/libabseil-cpp/Config.in +3 -2

index feb4963042..aba065fca7 100644
@@ -26,6 +26,7 @@ config BR2_PACKAGE_LIBABSEIL_CPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on !BR2_STATIC_LIBS # uses dlfcn.h
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR
 	help
 	  Abseil is an open-source collection of C++ library code
 	  designed to augment the C++ standard library. The Abseil

@@ -35,7 +36,7 @@ config BR2_PACKAGE_LIBABSEIL_CPP
 
 	  https://github.com/abseil/abseil-cpp
 
-comment "libabseil-cpp needs a toolchain w/ gcc >= 10, C++, threads, dynamic library"
+comment "libabseil-cpp needs a toolchain w/ wchar, gcc >= 10, C++, threads, dynamic library"
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
-		BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_USE_WCHAR

package/netdata/Config.in +3 -2

index 2c7d456528..65eba65ac0 100644
@@ -23,14 +23,15 @@ if BR2_PACKAGE_NETDATA
 config BR2_PACKAGE_NETDATA_PROMETHEUS
 	bool "prometheus remote write backend"
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR # protobuf
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # protobuf
 	select BR2_PACKAGE_PROTOBUF
 	select BR2_PACKAGE_SNAPPY
 	help
 	  Enable prometheus remote write backend
 
-comment "prometheus remote write backend needs a toolchain w/ gcc >= 10"
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+comment "prometheus remote write backend needs a toolchain w/ wchar, gcc >= 10"
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_USE_WCHAR
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
 
 endif

package/protobuf/Config.in +3 -2

index ae4044ea32..1f30314c3f 100644
@@ -45,6 +45,7 @@ config BR2_PACKAGE_PROTOBUF
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR # libabseil-cpp
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # libabseil-cpp
 	depends on !BR2_STATIC_LIBS
 	select BR2_PACKAGE_LIBABSEIL_CPP

@@ -55,7 +56,7 @@ config BR2_PACKAGE_PROTOBUF
 
 	  https://developers.google.com/protocol-buffers
 
-comment "protobuf needs a toolchain w/ C++, threads, dynamic library, gcc >= 10"
+comment "protobuf needs a toolchain w/ C++, threads, wchar, dynamic library, gcc >= 10"
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS \
-		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_USE_WCHAR
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS

package/re2/Config.in +3 -2

index b2de476bad..4e90423865 100644
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_RE2
 	bool "re2"
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR # libabseil-cpp
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # C++17, libabseil-cpp
 	depends on BR2_TOOLCHAIN_HAS_THREADS

@@ -14,8 +15,8 @@ config BR2_PACKAGE_RE2
 
 	  https://github.com/google/re2
 
-comment "re2 needs a toolchain w/ C++, threads, dynamic library, gcc >= 10"
+comment "re2 needs a toolchain w/ C++, threads, wchar, dynamic library, gcc >= 10"
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
 	depends on !BR2_INSTALL_LIBSTDCPP || \
 		!BR2_TOOLCHAIN_HAS_THREADS || \
-		BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_USE_WCHAR

package/sysdig/Config.in +4 -2

index a6e6809d82..73ac03e240 100644
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_SYSDIG
 	bool "sysdig"
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS # falcosecurity-libs
+	depends on BR2_USE_WCHAR # falcosecurity-libs -> libabseil-cpp
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS # falcosecurity-libs
 	depends on BR2_LINUX_KERNEL # falcosecurity-libs
 	depends on BR2_INSTALL_LIBSTDCPP

@@ -23,12 +24,13 @@ config BR2_PACKAGE_SYSDIG
 
 	  https://github.com/draios/sysdig/wiki
 
-comment "sysdig needs a glibc toolchain w/ C++, threads, gcc >= 10, dynamic library, a Linux kernel, and luajit or lua 5.1 to be built"
+comment "sysdig needs a glibc toolchain w/ C++, threads, wchar, gcc >= 10, dynamic library, a Linux kernel, and luajit or lua 5.1 to be built"
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || BR2_TOOLCHAIN_HAS_ATOMIC
 	depends on !BR2_LINUX_KERNEL || !BR2_INSTALL_LIBSTDCPP \
 		|| !BR2_TOOLCHAIN_HAS_THREADS \
-		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || BR2_STATIC_LIBS \
+		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_USE_WCHAR \
+		|| BR2_STATIC_LIBS \
 		|| !BR2_TOOLCHAIN_USES_GLIBC \
 		|| !BR2_PACKAGE_LUAINTERPRETER_ABI_VERSION_5_1

package/tensorflow-lite/Config.in +3 -2

index 2536112f99..6d2db7b2c2 100644
@@ -11,6 +11,7 @@ config BR2_PACKAGE_TENSORFLOW_LITE
 	bool "tensorflow-lite"
 	depends on BR2_PACKAGE_TENSORFLOW_LITE_ARCH_SUPPORTS
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR # libabseil-cpp
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # libabseil-cpp
 	depends on BR2_TOOLCHAIN_HAS_THREADS # cpuinfo
 	depends on BR2_TOOLCHAIN_USES_GLIBC

@@ -31,8 +32,8 @@ config BR2_PACKAGE_TENSORFLOW_LITE
 
 	  https://www.tensorflow.org/
 
-comment "tensorflow-lite needs a glibc toolchain w/ gcc >= 10, C++, threads, dynamic libraries"
+comment "tensorflow-lite needs a glibc toolchain w/ gcc >= 10, C++, threads, wchar, dynamic libraries"
 	depends on BR2_PACKAGE_TENSORFLOW_LITE_ARCH_SUPPORTS
 	depends on !BR2_TOOLCHAIN_USES_GLIBC || !BR2_INSTALL_LIBSTDCPP || \
 			!BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_TOOLCHAIN_HAS_THREADS || \
-			BR2_STATIC_LIBS
+			BR2_STATIC_LIBS || !BR2_USE_WCHAR

package/usbguard/Config.in +3 -2

index b71333aed9..7f9a95ad3c 100644
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_USBGUARD
 	bool "usbguard"
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS # protobuf
+	depends on BR2_USE_WCHAR # protobuf
 	depends on BR2_INSTALL_LIBSTDCPP # protobuf
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libqb, protobuf
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # protobuf

@@ -18,9 +19,9 @@ config BR2_PACKAGE_USBGUARD
 
 	  https://usbguard.github.io/
 
-comment "usbguard needs a toolchain w/ C++, threads, dynamic library, gcc >= 10"
+comment "usbguard needs a toolchain w/ C++, threads, wchar, dynamic library, gcc >= 10"
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS \
-		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || !BR2_USE_WCHAR
 	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
 
 comment "usbguard needs a toolchain not affected by GCC bug 64735"

package/webrtc-audio-processing/Config.in +4 -2

index 051985f5e3..f6cc4b6801 100644
@@ -6,6 +6,7 @@ config BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING
 	bool "webrtc-audio-processing"
 	depends on BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
+	depends on BR2_USE_WCHAR # libabseil-cpp
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # libabseil-cpp
 	# pthread_condattr_setclock

@@ -18,8 +19,9 @@ config BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING
 
 	  http://freedesktop.org/software/pulseaudio/webrtc-audio-processing/
 
-comment "webrtc-audio-processing needs a toolchain w/ C++, NPTL, dynamic library, gcc >= 10"
+comment "webrtc-audio-processing needs a toolchain w/ C++, NPTL, wchar, dynamic library, gcc >= 10"
 	depends on BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS_NPTL \
-		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10
+		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_10 \
+		|| !BR2_USE_WCHAR

Signature · 6 lines

2.53.0

_______________________________________________
buildroot mailing list
[email protected]
https://lists.buildroot.org/mailman/listinfo/buildroot

Thomas Petazzoni via buildroot

author Applied

2026-10-25 21:34 UTC #1 lore raw

Quoted 6 lines · Michael Nosthoff via buildroot

absl::StrFormat() unconditionally includes <cwchar>. So a toolchain with wchar support is required.
This was introduced to abseil in [0] and landed in buildroot with the bump to 20240722.0.

Quoted 9 lines

[0] https://github.com/abseil/abseil-cpp/commit/5dc2cc1a6a992e09d9cf930cdce7984640e2b7e0
Fixes:
https://autobuild.buildroot.org/results/948/948463b01ce52456179b06ae17d4ace9a823f92b//
Fixes 0d40b47866 ("package/libabseil-cpp: bump to version 20240722.0")
Assisted-by Github Copilot:GPT-6 Luna
Signed-off-by Michael Nosthoff <[email protected]>

Applied to master, thanks!

Best regards,

Thomas Petazzoni

Signature · 7 lines

Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
_______________________________________________
buildroot mailing list
[email protected]
https://lists.buildroot.org/mailman/listinfo/buildroot

Raphaël Mélotte via buildroot

author Applied

2026-10-30 15:26 UTC #2 lore raw

In reply to Michael Nosthoff via buildroot

In reply of:

Quoted 6 lines

absl::StrFormat() unconditionally includes <cwchar>. So a toolchain with wchar support is required.
This was introduced to abseil in [0] and landed in buildroot with the bump to 20240722.0.

Quoted 8 lines

[0] https://github.com/abseil/abseil-cpp/commit/5dc2cc1a6a992e09d9cf930cdce7984640e2b7e0
Fixes:
https://autobuild.buildroot.org/results/948/948463b01ce52456179b06ae17d4ace9a823f92b//
Fixes 0d40b47866 ("package/libabseil-cpp: bump to version 20240722.0")
Assisted-by Github Copilot:GPT-6 Luna
Signed-off-by Michael Nosthoff <[email protected]>

Applied to 2025.02.x, 2026.08.x. Thanks

Quoted 314 lines

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