grpc: fix build on ppc*-musl

srcpkgs/grpc/patches/google-sucks.patch

@@ -0,0 +1,111 @@
+An all-in-one patch that fixes several issues:
+
+1) no sys/platform/ppc.h outside of glibc (disabled on musl)
+2) generic stacktrace implementation only works on glibc (disabled on musl)
+3) powerpc stacktrace implementation only works on glibc (disabled on musl)
+4) powerpc stacktrace implementation has ppc64 assumptions (fixed)
+5) examine_stack.cpp makes glibc assumptions on powerpc (fixed)
+
+--- third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.cc
++++ third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.cc
+@@ -20,7 +20,7 @@
+ #include <intrin.h>
+ #endif
+ 
+-#if defined(__powerpc__) || defined(__ppc__)
++#if (defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)
+ #include <sys/platform/ppc.h>
+ #endif
+ 
+@@ -54,7 +54,7 @@ double UnscaledCycleClock::Frequency() {
+   return base_internal::NominalCPUFrequency();
+ }
+ 
+-#elif defined(__powerpc__) || defined(__ppc__)
++#elif (defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)
+ 
+ int64_t UnscaledCycleClock::Now() {
+   return __ppc_get_timebase();
+--- third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.h
++++ third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.h
+@@ -46,7 +46,7 @@
+ 
+ // The following platforms have an implementation of a hardware counter.
+ #if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \
+-  defined(__powerpc__) || defined(__ppc__) || \
++  ((defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)) || \
+   defined(_M_IX86) || defined(_M_X64)
+ #define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1
+ #else
+--- third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc
++++ third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc
+@@ -23,6 +23,10 @@
+ #include <csignal>
+ #include <cstdio>
+ 
++#if defined(__powerpc__)
++#include <asm/ptrace.h>
++#endif
++
+ #include "absl/base/attributes.h"
+ #include "absl/base/internal/raw_logging.h"
+ #include "absl/base/macros.h"
+@@ -51,8 +55,10 @@ void* GetProgramCounter(void* vuc) {
+     return reinterpret_cast<void*>(context->uc_mcontext.pc);
+ #elif defined(__powerpc64__)
+     return reinterpret_cast<void*>(context->uc_mcontext.gp_regs[32]);
+-#elif defined(__powerpc__)
++#elif defined(__powerpc64__) || (defined(__powerpc__) && defined(__GLIBC__))
+     return reinterpret_cast<void*>(context->uc_mcontext.regs->nip);
++#elif defined(__powerpc__)
++    return reinterpret_cast<void*>(((struct pt_regs *)context->uc_regs)->nip);
+ #elif defined(__s390__) && !defined(__s390x__)
+     return reinterpret_cast<void*>(context->uc_mcontext.psw.addr & 0x7fffffff);
+ #elif defined(__s390__) && defined(__s390x__)
+--- third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h
++++ third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h
+@@ -34,13 +34,13 @@
+ # if defined(__i386__) || defined(__x86_64__)
+ #define ABSL_STACKTRACE_INL_HEADER \
+     "absl/debugging/internal/stacktrace_x86-inl.inc"
+-# elif defined(__ppc__) || defined(__PPC__)
++# elif (defined(__ppc__) || defined(__PPC__)) && defined(__GLIBC__)
+ #define ABSL_STACKTRACE_INL_HEADER \
+     "absl/debugging/internal/stacktrace_powerpc-inl.inc"
+ # elif defined(__aarch64__)
+ #define ABSL_STACKTRACE_INL_HEADER \
+     "absl/debugging/internal/stacktrace_aarch64-inl.inc"
+-# elif defined(__arm__)
++# elif defined(__arm__) && defined(__GLIBC__)
+ // Note: When using glibc this may require -funwind-tables to function properly.
+ #define ABSL_STACKTRACE_INL_HEADER \
+   "absl/debugging/internal/stacktrace_generic-inl.inc"
+@@ -49,10 +49,10 @@
+    "absl/debugging/internal/stacktrace_unimplemented-inl.inc"
+ # endif
+ #else  // defined(NO_FRAME_POINTER)
+-# if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
++# if (defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)) && defined(__GLIBC__)
+ #define ABSL_STACKTRACE_INL_HEADER \
+     "absl/debugging/internal/stacktrace_generic-inl.inc"
+-# elif defined(__ppc__) || defined(__PPC__)
++# elif (defined(__ppc__) || defined(__PPC__)) && defined(__GLIBC__)
+ #define ABSL_STACKTRACE_INL_HEADER \
+     "absl/debugging/internal/stacktrace_generic-inl.inc"
+ # else
+--- third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc
++++ third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc
+@@ -130,8 +130,13 @@ static void **NextStackFrame(void **old_sp, const void *uc) {
+         StacktracePowerPCGetLR(new_sp) == kernel_sigtramp_rt64_address) {
+       const ucontext_t* signal_context =
+           reinterpret_cast<const ucontext_t*>(uc);
++#if defined(__powerpc64__)
+       void **const sp_before_signal =
+           reinterpret_cast<void**>(signal_context->uc_mcontext.gp_regs[PT_R1]);
++#else
++      void **const sp_before_signal =
++          reinterpret_cast<void**>(signal_context->uc_mcontext.uc_regs->gregs[PT_R1]);
++#endif
+       // Check that alleged sp before signal is nonnull and is reasonably
+       // aligned.
+       if (sp_before_signal != nullptr &&

srcpkgs/grpc/template

@@ -30,12 +30,6 @@ fi
 post_extract() {
 	rm -rf third_party/abseil-cpp
 	mv ../abseil-cpp-${_abseilver} third_party/abseil-cpp
-
-	case "$XBPS_TARGET_MACHINE" in
-	*-musl)
-		sed -i 's/stacktrace_generic/stacktrace_unimplemented/g' third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h ;;
-	esac
-
 }
 
 grpc-devel_package() {