From da5a961150fc20e48fb83ec3a279266600f47472 Mon Sep 17 00:00:00 2001
From: Guoguo <16666742+imguoguo@users.noreply.github.com>
Date: Tue, 12 Aug 2025 16:08:22 +0200
Subject: [PATCH 2/3] Fix build failure on RISC-V architecture (#4173)

---
 aconfigure                               | 3 +++
 aconfigure.ac                            | 3 +++
 config.guess                             | 3 +++
 config.sub                               | 2 ++
 third_party/webrtc/src/webrtc/typedefs.h | 7 +++++++
 5 files changed, 18 insertions(+)

diff --git a/aconfigure b/aconfigure
index eac120472..09cd7b901 100755
--- a/aconfigure
+++ b/aconfigure
@@ -9114,6 +9114,9 @@ $as_echo "Checking if libwebrtc is disabled...no" >&6; }
                                  ac_webrtc_instset=neon
                                  ac_webrtc_cflags="-DWEBRTC_ARCH_ARM64"
                                  ;;
+                             riscv*)
+                                 ac_webrtc_instset=generic
+                                 ;;
                              *)
                                  ac_webrtc_instset=sse2
                                  ;;
diff --git a/aconfigure.ac b/aconfigure.ac
index fc472c7de..81be8ed7b 100644
--- a/aconfigure.ac
+++ b/aconfigure.ac
@@ -2154,6 +2154,9 @@ AC_ARG_ENABLE(libwebrtc,
                                      ac_webrtc_instset=generic
                                  fi
                                  ;;
+                             riscv*)
+                                 ac_webrtc_instset=generic
+                                 ;;
                              *)
                                  ac_webrtc_instset=sse2
                                  ;;
diff --git a/config.guess b/config.guess
index aa04f04bd..b6f948fdc 100755
--- a/config.guess
+++ b/config.guess
@@ -979,6 +979,9 @@ EOF
     ppc:Linux:*:*)
 	echo powerpc-unknown-linux-gnu
 	exit ;;
+    riscv32:Linux:*:* | riscv32be:Linux:*:* | riscv64:Linux:*:* | riscv64be:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
     s390:Linux:*:* | s390x:Linux:*:*)
 	echo ${UNAME_MACHINE}-ibm-linux
 	exit ;;
diff --git a/config.sub b/config.sub
index a92e84680..3117281cb 100755
--- a/config.sub
+++ b/config.sub
@@ -304,6 +304,7 @@ case $basic_machine in
 	| pdp10 | pdp11 | pj | pjl \
 	| powerpc | powerpc64 | powerpc64le | powerpcle \
 	| pyramid \
+	| riscv | riscv32 | riscv32be | riscv64 | riscv64be \
 	| rl78 | rx \
 	| score \
 	| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[34]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
@@ -419,6 +420,7 @@ case $basic_machine in
 	| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
 	| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
 	| pyramid-* \
+	| riscv-* | riscv32-* | riscv32be-* | riscv64-* | riscv64be-* \
 	| rl78-* | romp-* | rs6000-* | rx-* \
 	| sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
 	| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
diff --git a/third_party/webrtc/src/webrtc/typedefs.h b/third_party/webrtc/src/webrtc/typedefs.h
index 3034c7e74..d8d9813fe 100644
--- a/third_party/webrtc/src/webrtc/typedefs.h
+++ b/third_party/webrtc/src/webrtc/typedefs.h
@@ -47,6 +47,13 @@
 #elif defined(__pnacl__)
 #define WEBRTC_ARCH_32_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN
+#elif defined(__riscv) || defined(__riscv__)
+#define WEBRTC_ARCH_LITTLE_ENDIAN
+#if __riscv_xlen == 64
+#define WEBRTC_ARCH_64_BITS
+#else
+#define WEBRTC_ARCH_32_BITS
+#endif
 #else
 #error Please add support for your architecture in typedefs.h
 #endif
-- 
2.50.1