Compile with Android NDK r13b using clang

android-config

@@ -39,8 +39,9 @@ PATH="$TOOLCHAIN"/bin:"$PATH"
     --without-libxml2 \
     --disable-python-bindings \
     --disable-examples \
-    CC="$TOOLCHAIN"/bin/arm-linux-androideabi-gcc \
-    CXX="$TOOLCHAIN"/bin/arm-linux-androideabi-g++ \
+    --disable-threads \
+    CC="$TOOLCHAIN"/bin/arm-linux-androideabi-clang \
+    CXX="$TOOLCHAIN"/bin/arm-linux-androideabi-clang++ \
     CPPFLAGS="-fPIE -I$PREFIX/include" \
     PKG_CONFIG_LIBDIR="$PREFIX/lib/pkgconfig" \
     LDFLAGS="-fPIE -pie -L$PREFIX/lib"

src/shrpx.cc

@@ -411,7 +411,7 @@ void exec_binary() {
     LOG(ERROR) << "Unblocking all signals failed: "
                << xsi_strerror(error, errbuf.data(), errbuf.size());
 
-    _Exit(EXIT_FAILURE);
+    nghttp2_Exit(EXIT_FAILURE);
   }
 
   auto exec_path =
@@ -419,7 +419,7 @@ void exec_binary() {
 
   if (!exec_path) {
     LOG(ERROR) << "Could not resolve the executable path";
-    _Exit(EXIT_FAILURE);
+    nghttp2_Exit(EXIT_FAILURE);
   }
 
   auto argv = make_unique<char *[]>(suconfig.argc + 1);
@@ -492,7 +492,7 @@ void exec_binary() {
   if (execve(argv[0], argv.get(), envp.get()) == -1) {
     auto error = errno;
     LOG(ERROR) << "execve failed: errno=" << error;
-    _Exit(EXIT_FAILURE);
+    nghttp2_Exit(EXIT_FAILURE);
   }
 }
 } // namespace
@@ -1170,7 +1170,7 @@ pid_t fork_worker_process(int &main_ipc_fd,
       LOG(FATAL) << "Unblocking all signals failed: "
                  << xsi_strerror(error, errbuf.data(), errbuf.size());
 
-      _Exit(EXIT_FAILURE);
+      nghttp2_Exit(EXIT_FAILURE);
     }
 
     close(ipc_fd[1]);
@@ -1179,13 +1179,13 @@ pid_t fork_worker_process(int &main_ipc_fd,
     if (rv != 0) {
       LOG(FATAL) << "Worker process returned error";
 
-      _Exit(EXIT_FAILURE);
+      nghttp2_Exit(EXIT_FAILURE);
     }
 
     LOG(NOTICE) << "Worker process shutting down momentarily";
 
-    // call exit(...) instead of _Exit to get leak sanitizer report
-    _Exit(EXIT_SUCCESS);
+    // call exit(...) instead of nghttp2_Exit to get leak sanitizer report
+    nghttp2_Exit(EXIT_SUCCESS);
   }
 
   // parent process

src/shrpx.h

@@ -36,13 +36,15 @@
 
 #include <cassert>
 
+#ifndef HAVE__EXIT
+#define nghttp2_Exit(status) _exit(status)
+#else // HAVE__EXIT
+#define nghttp2_Exit(status) _Exit(status)
+#endif // HAVE__EXIT
+
 #include "shrpx_log.h"
 
-#ifndef HAVE__EXIT
-#define _Exit(status) _exit(status)
-#endif // !HAVE__EXIT
-
-#define DIE() _Exit(EXIT_FAILURE)
+#define DIE() nghttp2_Exit(EXIT_FAILURE)
 
 #if defined(HAVE_DECL_INITGROUPS) && !HAVE_DECL_INITGROUPS
 inline int initgroups(const char *user, gid_t group) { return 0; }

src/shrpx_exec.cc

@@ -83,7 +83,7 @@ int exec_read_command(Process &proc, char *const argv[]) {
       auto error = errno;
       LOG(FATAL) << "Unblocking all signals failed: errno=" << error;
 
-      _Exit(EXIT_FAILURE);
+      nghttp2_Exit(EXIT_FAILURE);
     }
 
     dup2(pfd[1], 1);
@@ -94,7 +94,7 @@ int exec_read_command(Process &proc, char *const argv[]) {
       auto error = errno;
       LOG(ERROR) << "Could not execute command: " << argv[0]
                  << ", execve() faild, errno=" << error;
-      _Exit(EXIT_FAILURE);
+      nghttp2_Exit(EXIT_FAILURE);
     }
     // unreachable
   }
@@ -111,7 +111,7 @@ int exec_read_command(Process &proc, char *const argv[]) {
     auto error = errno;
     LOG(FATAL) << "Restoring all signals failed: errno=" << error;
 
-    _Exit(EXIT_FAILURE);
+    nghttp2_Exit(EXIT_FAILURE);
   }
 
   if (pid == -1) {

src/shrpx_worker_process.cc

@@ -161,7 +161,7 @@ void ipc_readcb(struct ev_loop *loop, ev_io *w, int revents) {
   if (nread == 0) {
     // IPC socket closed.  Perform immediate shutdown.
     LOG(FATAL) << "IPC socket is closed.  Perform immediate shutdown.";
-    _Exit(EXIT_FAILURE);
+    nghttp2_Exit(EXIT_FAILURE);
   }
 
   for (ssize_t i = 0; i < nread; ++i) {
@@ -384,7 +384,7 @@ void nb_child_cb(struct ev_loop *loop, ev_child *w, int revents) {
 
   LOG(FATAL) << "neverbleed process exitted; aborting now";
 
-  _Exit(EXIT_FAILURE);
+  nghttp2_Exit(EXIT_FAILURE);
 }
 } // namespace
 #endif // HAVE_NEVERBLEED