From 1a35bb6d71b6301287e21aaabd112997ea0f0a7f Mon Sep 17 00:00:00 2001
From: Jan Engelhardt <jengelh@inai.de>
Date: Thu, 9 Nov 2023 20:32:47 +0100
Subject: Build: add Solaris compilation support (#282)

---
 CMakeLists.txt                             | 1 +
 cmake/config.hpp.cmake                     | 1 +
 src/vmime/platforms/posix/posixHandler.cpp | 5 +++++
 3 files changed, 7 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8092eef..8f903e9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -845,6 +845,7 @@ CHECK_FUNCTION_EXISTS(gettid VMIME_HAVE_GETTID)
 CHECK_FUNCTION_EXISTS(syscall VMIME_HAVE_SYSCALL)
 CHECK_SYMBOL_EXISTS(SYS_gettid sys/syscall.h VMIME_HAVE_SYSCALL_GETTID)
 CHECK_SYMBOL_EXISTS(getthrid unistd.h VMIME_HAVE_GETTHRID)
+CHECK_SYMBOL_EXISTS(_lwp_self sys/lwp.h VMIME_HAVE_LWP_SELF)
 
 CHECK_SYMBOL_EXISTS(SO_KEEPALIVE sys/socket.h VMIME_HAVE_SO_KEEPALIVE)
 CHECK_SYMBOL_EXISTS(SO_NOSIGPIPE sys/socket.h VMIME_HAVE_SO_NOSIGPIPE)
diff --git a/cmake/config.hpp.cmake b/cmake/config.hpp.cmake
index c5e9fdef..6cf49b8c 100644
--- a/cmake/config.hpp.cmake
+++ b/cmake/config.hpp.cmake
@@ -77,6 +77,7 @@ typedef unsigned @VMIME_64BIT_TYPE@ vmime_uint64;
 #cmakedefine01 VMIME_HAVE_SYSCALL
 #cmakedefine01 VMIME_HAVE_SYSCALL_GETTID
 #cmakedefine01 VMIME_HAVE_GETTHRID
+#cmakedefine01 VMIME_HAVE_LWP_SELF
 #cmakedefine01 VMIME_HAVE_GMTIME_S
 #cmakedefine01 VMIME_HAVE_GMTIME_R
 #cmakedefine01 VMIME_HAVE_LOCALTIME_S
diff --git a/src/vmime/platforms/posix/posixHandler.cpp b/src/vmime/platforms/posix/posixHandler.cpp
index eecdbea9..148d2169 100644
--- a/src/vmime/platforms/posix/posixHandler.cpp
+++ b/src/vmime/platforms/posix/posixHandler.cpp
@@ -48,6 +48,9 @@
 #if VMIME_HAVE_SYSCALL
 #	include <sys/syscall.h>
 #endif
+#if VMIME_HAVE_LWP_SELF
+#	include <sys/lwp.h>
+#endif
 
 #include <netdb.h>
 
@@ -227,6 +230,8 @@ unsigned int posixHandler::getThreadId() const {
 	return static_cast <unsigned int>(::syscall(SYS_gettid));
 #elif VMIME_HAVE_GETTHRID  // OpenBSD
 	return static_cast <unsigned int>(::getthrid());
+#elif VMIME_HAVE_LWP_SELF  // Solaris
+	return static_cast <unsigned int>(::_lwp_self());
 #else
 	#error We have no implementation of getThreadId() for this platform!
 #endif
-- 
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