Bug#35330950 Contribution: sql/memory: Fix build on musl

Misc. fixes for Alpine Linux:
 - disable build-id
 - disable compiler option -ftls-model=initial-exec
 - add missing include of libgen.h
 - DNS resolver functions
 - include <unistd.h> rather than <sys/unistd.h>
 - include <sys/stat.h> to get definition of mode_t
 - misc sysconf() macros are only available with __GLIBC__
 - no backtrace/stacktrace on Alpine Linux
 - disable the unit test for segfault

The list of packages required or useful to build on Alpine:
 - BOOST version boost_1_77_0
 - bash
 - bison
 - build-base
 - cmake
 - curl-dev
 - cyrus-sasl-dev
 - cyrus-sasl-scram
 - emacs
 - gcc
 - gcompat
 - git
 - git-review
 - libaio
 - libc6-compat
 - libfido2-dev
 - libnsl
 - libpthread-stubs
 - libtirpc
 - libtirpc-dev
 - libudev-zero-dev
 - linux-headers
 - ncurses-dev
 - openldap-dev make
 - openssl
 - openssl-dev
 - perl
 - perl-app-cpanminus
 - perl-dbi
 - perl-dev
 - perl-devel-checklib
 - perl-expect
 - perl-json
 - protobuf-dev
 - rpcgen
 - zip

Change-Id: Iec8fc1617eb3fece5152b9b2a1221da45510562d
(cherry picked from commit 4cecfd91a6e8e1b29e835ca17e3da4c94065908f)

Author: Tor Didriksen

CMakeLists.txt

@@ -789,7 +789,7 @@ IF(WITH_DEFAULT_COMPILER_OPTIONS)
 ENDIF()
 
 # Assume, for now at least, that we want build-id for all kinds of Linux builds.
-IF(LINUX)
+IF(LINUX AND NOT LINUX_ALPINE)
   OPTION(WITH_BUILD_ID "Add --build-id=sha1 to all executables." ON)
   IF(WITH_BUILD_ID)
     SET(HAVE_BUILD_ID_SUPPORT 1)

cmake/build_configurations/compiler_options.cmake

@@ -65,7 +65,8 @@ IF(UNIX)
   ENDIF()
 
   # Faster TLS model
-  IF(MY_COMPILER_IS_GNU_OR_CLANG AND NOT SOLARIS AND NOT LINUX_RHEL6)
+  IF(MY_COMPILER_IS_GNU_OR_CLANG
+      AND NOT SOLARIS AND NOT LINUX_RHEL6 AND NOT LINUX_ALPINE)
     STRING_APPEND(COMMON_C_FLAGS     " -ftls-model=initial-exec")
     STRING_APPEND(COMMON_CXX_FLAGS   " -ftls-model=initial-exec")
   ENDIF()

libmysql/dns_srv.cc

@@ -40,16 +40,24 @@
 // POSIX version
 
 static bool get_dns_srv(Dns_srv_data &data, const char *dnsname, int &error) {
+#ifdef LINUX_ALPINE
+  res_init();
+#else
   struct __res_state state {};
   res_ninit(&state);
+#endif
   unsigned char query_buffer[NS_PACKETSZ];
   bool ret = true;
 
   data.clear();
 
+#ifdef LINUX_ALPINE
+  int res = res_search(dnsname, ns_c_in, ns_t_srv, query_buffer,
+                       sizeof(query_buffer));
+#else
   int res = res_nsearch(&state, dnsname, ns_c_in, ns_t_srv, query_buffer,
                         sizeof(query_buffer));
-
+#endif
   if (res >= 0) {
     ns_msg msg;
     ns_initparse(query_buffer, res, &msg);
@@ -84,7 +92,11 @@ static bool get_dns_srv(Dns_srv_data &data, const char *dnsname, int &error) {
     error = h_errno;
   }
 
+#ifdef LINUX_ALPINE
+  // nothing
+#else
   res_nclose(&state);
+#endif
   return ret;
 }
 

router/src/harness/include/mysql/harness/access_rights.h

@@ -32,7 +32,7 @@
 #else
 #include <sys/stat.h>  // stat
 #include <sys/types.h>
-#include <sys/unistd.h>
+#include <unistd.h>
 #endif
 
 #include <optional>

router/src/router/include/mysqlrouter/utils.h

@@ -27,6 +27,8 @@
 
 #include "mysqlrouter/router_export.h"
 
+#include <sys/stat.h>  // mode_t
+
 #include <chrono>
 #include <cstdint>
 #include <functional>

sql/memory/aligned_atomic.h

@@ -77,7 +77,7 @@ static inline size_t _cache_line_size() {
   return line_size;
 }
 
-#elif defined(__linux__)
+#elif defined(__GLIBC__)
 static inline size_t _cache_line_size() {
   long size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
   if (size == -1) return 64;

storage/ndb/src/common/portlib/ndb_stacktrace.cpp

@@ -36,7 +36,9 @@
 #include <link.h>
 #endif
 
+#ifdef HAVE_STACKTRACE
 static unsigned long long ndb_get_program_base_address();
+#endif
 
 void ndb_init_stacktrace() {
 #ifdef HAVE_STACKTRACE
@@ -76,6 +78,8 @@ unsigned long long ndb_get_program_base_address() {
 #elif defined(_WIN32)
 unsigned long long ndb_get_program_base_address() { return ULLONG_MAX; }
 #else
+
+#ifdef HAVE_STACKTRACE
 static int ndb_get_program_base_address_callback(struct dl_phdr_info *info,
                                                  size_t /* size */,
                                                  void *data) {
@@ -90,6 +94,8 @@ unsigned long long ndb_get_program_base_address() {
   dl_iterate_phdr(&ndb_get_program_base_address_callback, callback_data);
   return base_address;
 }
+#endif  // HAVE_STACKTRACE
+
 #endif
 
 #endif

unittest/gunit/CMakeLists.txt

@@ -307,6 +307,10 @@ SET(SERVER_TESTS
   xid_extract
   log_event_status_size
 )
+# Endless loop in FatalSignalDeathTest
+IF(LINUX_ALPINE)
+  LIST(REMOVE_ITEM SERVER_TESTS segfault)
+ENDIF()
 
 IF(MY_COMPILER_IS_GNU AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 12)
   ADD_COMPILE_FLAGS(regexp_engine-t.cc COMPILE_FLAGS "-Wno-restrict")