MegEngine/third_party/patches/0001-fix-arm-linux-fix-uclibc-build-error.patch

From 0c64236f0d9463e508f8ebd8e73efafa0049d13b Mon Sep 17 00:00:00 2001
From: Megvii Engine Team <megengine@megvii.com>
Date: Thu, 30 Jul 2020 14:26:40 +0800
Subject: [PATCH] fix(arm/linux): fix uclibc build error

---
 src/arm/linux/hwcap.c  | 7 ++++---
 src/arm/linux/init.c   | 4 +++-
 src/linux/processors.c | 5 +++++
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/arm/linux/hwcap.c b/src/arm/linux/hwcap.c
index 36d0d91..5e1c301 100644
--- a/src/arm/linux/hwcap.c
+++ b/src/arm/linux/hwcap.c
@@ -15,7 +15,8 @@
 #include <arm/linux/api.h>
 #include <cpuinfo/log.h>
 
-#if CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_ARM && !defined(__ANDROID__)
+#if CPUINFO_ARCH_ARM64 || CPUINFO_ARCH_ARM && !defined(__ANDROID__) && !defined(__UCLIBC__)
+
 	#include <sys/auxv.h>
 #else
 	#define AT_HWCAP 16
@@ -38,7 +39,7 @@
 #endif
 
 
-#if CPUINFO_ARCH_ARM
+#if CPUINFO_ARCH_ARM && !defined(__UCLIBC__)
 	typedef unsigned long (*getauxval_function_t)(unsigned long);
 
 	bool cpuinfo_arm_linux_hwcap_from_getauxval(
@@ -144,7 +145,7 @@
 			#endif
 		}
 	#endif /* __ANDROID__ */
-#elif CPUINFO_ARCH_ARM64
+#elif CPUINFO_ARCH_ARM64 && !defined(__UCLIBC__)
 	uint32_t cpuinfo_arm_linux_hwcap_from_getauxval(void) {
 		#if CPUINFO_MOCK
 			return mock_hwcap;
diff --git a/src/arm/linux/init.c b/src/arm/linux/init.c
index 89d957e..8225f5e 100644
--- a/src/arm/linux/init.c
+++ b/src/arm/linux/init.c
@@ -234,6 +234,8 @@ void cpuinfo_arm_linux_init(void) {
 		cpuinfo_arm_linux_decode_chipset(proc_cpuinfo_hardware, proc_cpuinfo_revision, valid_processors, 0);
 #endif
 
+#if !defined(__UCLIBC__)
+
 	#if CPUINFO_ARCH_ARM
 		uint32_t isa_features = 0, isa_features2 = 0;
 		#ifdef __ANDROID__
@@ -282,7 +284,7 @@ void cpuinfo_arm_linux_init(void) {
 		cpuinfo_arm64_linux_decode_isa_from_proc_cpuinfo(
 			isa_features, last_midr, &chipset, &cpuinfo_isa);
 	#endif
-
+#endif
 	/* Detect min/max frequency and package ID */
 	for (uint32_t i = 0; i < arm_linux_processors_count; i++) {
 		if (bitmask_all(arm_linux_processors[i].flags, CPUINFO_LINUX_FLAG_VALID)) {
diff --git a/src/linux/processors.c b/src/linux/processors.c
index 4904e2a..a1d4693 100644
--- a/src/linux/processors.c
+++ b/src/linux/processors.c
@@ -90,8 +90,13 @@ static bool uint32_parser(const char* text_start, const char* text_end, void* co
 	uint32_t kernel_max = 0;
 	const char* parsed_end = parse_number(text_start, text_end, &kernel_max);
 	if (parsed_end == text_start) {
+#if defined(__UCLIBC__)
+		cpuinfo_log_warning("failed to parse file %s: \"%.*s\" is not an unsigned number",
+			KERNEL_MAX_FILENAME, (int) (text_end - text_start), text_start);
+#else
 		cpuinfo_log_error("failed to parse file %s: \"%.*s\" is not an unsigned number",
 			KERNEL_MAX_FILENAME, (int) (text_end - text_start), text_start);
+#endif
 		return false;
 	} else {
 		for (const char* char_ptr = parsed_end; char_ptr != text_end; char_ptr++) {
-- 
2.26.2