[Buildroot] [PATCH 1/2] package/libabseil-cpp: fix build on RISC-V 32-bits

[Yann E. MORIN <yann.morin.1998@free.fr>]

thomas, All,

On 2020-08-08 17:39 +0200, Thomas Petazzoni spake thusly:
> 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>

Both applied to master, thanks.

Regards,
Yann E. MORIN.

> ---
>  .../0003-Fix-build-on-riscv32-675.patch       | 77 +++++++++++++++++++
>  1 file changed, 77 insertions(+)
>  create mode 100644 package/libabseil-cpp/0003-Fix-build-on-riscv32-675.patch
> 
> 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
> index 0000000000..0077c5fe9b
> --- /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
> +
> -- 
> 2.26.2
> 
> _______________________________________________
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> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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