package/libabseil-cpp: fix build on RISC-V 32-bits

This commit backports an upstream patch that fixes the build on RISC-V
32-bits.

Fixes:

  http://autobuild.buildroot.net/results/c6c2c99bdba8c840d52fe0464d26aca169ea1d90/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

diff --git a/package/libabseil-cpp/0003-Fix-build-on-riscv32-675.patch b/package/libabseil-cpp/0003-Fix-build-on-riscv32-675.patch
new file mode 100644 (file)
index 0000000..0077c5f
--- /dev/null
+++ b/package/libabseil-cpp/0003-Fix-build-on-riscv32-675.patch
@@ -0,0 +1,77 @@
+From 3f347c46272886a099852a4cd303ecf37a054de8 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 18 May 2020 10:23:50 -0700
+Subject: [PATCH] Fix build on riscv32 (#675)
+
+[Backport from upstream commit 3f347c46272886a099852a4cd303ecf37a054de8]
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+---
+ absl/base/internal/direct_mmap.h        | 5 +++++
+ absl/base/internal/spinlock_linux.inc   | 8 ++++++++
+ absl/synchronization/internal/waiter.cc | 8 ++++++++
+ 3 files changed, 21 insertions(+)
+
+diff --git a/absl/base/internal/direct_mmap.h b/absl/base/internal/direct_mmap.h
+index 5618867..16accf0 100644
+--- a/absl/base/internal/direct_mmap.h
++++ b/absl/base/internal/direct_mmap.h
+@@ -61,6 +61,10 @@ extern "C" void* __mmap2(void*, size_t, int, int, int, size_t);
+ #endif
+ #endif  // __BIONIC__
+ 
++#if defined(__NR_mmap2) && !defined(SYS_mmap2)
++#define SYS_mmap2 __NR_mmap2
++#endif
++
+ namespace absl {
+ ABSL_NAMESPACE_BEGIN
+ namespace base_internal {
+@@ -72,6 +76,7 @@ inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd,
+ #if defined(__i386__) || defined(__ARM_ARCH_3__) || defined(__ARM_EABI__) || \
+     (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32) ||                   \
+     (defined(__PPC__) && !defined(__PPC64__)) ||                             \
++    (defined(__riscv) && __riscv_xlen == 32) ||                              \
+     (defined(__s390__) && !defined(__s390x__))
+   // On these architectures, implement mmap with mmap2.
+   static int pagesize = 0;
+diff --git a/absl/base/internal/spinlock_linux.inc b/absl/base/internal/spinlock_linux.inc
+index 323edd6..e31c6ed 100644
+--- a/absl/base/internal/spinlock_linux.inc
++++ b/absl/base/internal/spinlock_linux.inc
+@@ -46,6 +46,14 @@ static_assert(sizeof(std::atomic<uint32_t>) == sizeof(int),
+ #endif
+ #endif
+ 
++#if defined(__NR_futex_time64) && !defined(SYS_futex_time64)
++#define SYS_futex_time64 __NR_futex_time64
++#endif
++
++#if defined(SYS_futex_time64) && !defined(SYS_futex)
++#define SYS_futex SYS_futex_time64
++#endif
++
+ extern "C" {
+ 
+ ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay(
+diff --git a/absl/synchronization/internal/waiter.cc b/absl/synchronization/internal/waiter.cc
+index 2949f5a..b6150b9 100644
+--- a/absl/synchronization/internal/waiter.cc
++++ b/absl/synchronization/internal/waiter.cc
+@@ -86,6 +86,14 @@ static void MaybeBecomeIdle() {
+ #endif
+ #endif
+ 
++#if defined(__NR_futex_time64) && !defined(SYS_futex_time64)
++#define SYS_futex_time64 __NR_futex_time64
++#endif
++
++#if defined(SYS_futex_time64) && !defined(SYS_futex)
++#define SYS_futex SYS_futex_time64
++#endif
++
+ class Futex {
+  public:
+   static int WaitUntil(std::atomic<int32_t> *v, int32_t val,
+-- 
+2.26.2
+