From 0dfb289a3b362b082ac3608d887e42f09dadc0d2 Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Date: Mon, 31 Dec 2018 16:22:07 +0100
Subject: [PATCH] Properly detect the availability of pthread_setname_np()

This commit adds a CMake check for the availability of
pthread_setname_np(), and only uses it on Linux when available.

Indeed, some C libraries, such as uClibc, do not provide this
non-POSIX function in all cases.

Upstream: https://github.com/grpc/grpc/pull/17610
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
 CMakeLists.txt                            | 6 ++++++
 include/grpc/impl/codegen/port_platform.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 89e834b..c7bd2ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,6 +97,12 @@ endif()
 
 set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 
+include(CheckSymbolExists)
+check_symbol_exists(pthread_setname_np pthread.h HAVE_PTHREAD_SETNAME_NP)
+if (HAVE_PTHREAD_SETNAME_NP)
+  add_definitions(-DHAVE_PTHREAD_SETNAME_NP)
+endif ()
+
 if (MSVC)
   include(cmake/msvc_static_runtime.cmake)
   add_definitions(-D_WIN32_WINNT=0x600 -D_SCL_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS -D_WINSOCK_DEPRECATED_NO_WARNINGS)
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index 031c0c3..a29a9dc 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -181,7 +181,9 @@
 #endif /* _LP64 */
 #ifdef __GLIBC__
 #define GPR_POSIX_CRASH_HANDLER 1
+#if defined(HAVE_PTHREAD_SETNAME_NP)
 #define GPR_LINUX_PTHREAD_NAME 1
+#endif /* HAVE_PTHREAD_SETNAME_NP */
 #include <linux/version.h>
 #else /* musl libc */
 #define GPR_MUSL_LIBC_COMPAT 1
-- 
2.14.4