Build related improvements, better ASMJIT_NO_STDCXX support

* Added more cmake options to control features to be built * Added a detection whether to link to libpthread (if not part of libc) * Added a detection whether to link to librt (if not part of libc) * Removed pure virtual functions as this collides with -nostdlib * As a result the support for ASMJIT_NO_STDCXX has improved
2025-12-17 04:24:37 +03:00 · 2023-12-01 16:21:33 +01:00
parent 1f8999065b
commit 803712f111
10 changed files with 142 additions and 50 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@ if (NOT CMAKE_PROJECT_NAME OR "${CMAKE_PROJECT_NAME}" STREQUAL "asmjit")
 endif()

 include(CheckCXXCompilerFlag)
+INCLUDE(CheckCXXSourceCompiles)
 include(GNUInstallDirs)

 # AsmJit - Deprecated
@@ -35,10 +36,12 @@ endif()
 # AsmJit - Configuration
 # ======================

+# AsmJit testing.
 if (NOT DEFINED ASMJIT_TEST)
  set(ASMJIT_TEST FALSE)
 endif()

+# AsmJit build options
 if (NOT DEFINED ASMJIT_EMBED)
  set(ASMJIT_EMBED FALSE)
 endif()
@@ -51,6 +54,15 @@ if (NOT DEFINED ASMJIT_SANITIZE)
  set(ASMJIT_SANITIZE FALSE)
 endif()

+if (NOT DEFINED ASMJIT_NO_NATVIS)
+  set(ASMJIT_NO_NATVIS FALSE)
+endif()
+
+if (NOT DEFINED ASMJIT_NO_CUSTOM_FLAGS)
+  set(ASMJIT_NO_CUSTOM_FLAGS FALSE)
+endif()
+
+# AsmJit backends selection.
 if (NOT DEFINED ASMJIT_NO_X86)
  set(ASMJIT_NO_X86 FALSE)
 endif()
@@ -63,12 +75,41 @@ if (NOT DEFINED ASMJIT_NO_FOREIGN)
  set(ASMJIT_NO_FOREIGN FALSE)
 endif()

-if (NOT DEFINED ASMJIT_NO_NATVIS)
-  set(ASMJIT_NO_NATVIS FALSE)
+# AsmJit features selection.
+if (NOT DEFINED ASMJIT_NO_DEPRECATED)
+  set(ASMJIT_NO_DEPRECATED FALSE)
 endif()

-if (NOT DEFINED ASMJIT_NO_CUSTOM_FLAGS)
-  set(ASMJIT_NO_CUSTOM_FLAGS FALSE)
+if (NOT DEFINED ASMJIT_NO_SHM_OPEN)
+  set(ASMJIT_NO_SHM_OPEN FALSE)
+endif()
+
+if (NOT DEFINED ASMJIT_NO_JIT)
+  set(ASMJIT_NO_JIT FALSE)
+endif()
+
+if (NOT DEFINED ASMJIT_NO_TEXT)
+  set(ASMJIT_NO_TEXT ${ASMJIT_NO_TEXT})
+endif()
+
+if (NOT DEFINED ASMJIT_NO_LOGGING)
+  set(ASMJIT_NO_LOGGING FALSE)
+endif()
+
+if (NOT DEFINED ASMJIT_NO_VALIDATION)
+  set(ASMJIT_NO_VALIDATION ${ASMJIT_NO_VALIDATION})
+endif()
+
+if (NOT DEFINED ASMJIT_NO_INTROSPECTION)
+  set(ASMJIT_NO_INTROSPECTION ${ASMJIT_NO_INTROSPECTION})
+endif()
+
+if (NOT DEFINED ASMJIT_NO_BUILDER)
+  set(ASMJIT_NO_BUILDER FALSE)
+endif()
+
+if (NOT DEFINED ASMJIT_NO_COMPILER)
+  set(ASMJIT_NO_BUILDER ${ASMJIT_NO_BUILDER})
 endif()

 # EMBED implies STATIC.
@@ -76,16 +117,28 @@ if (ASMJIT_EMBED AND NOT ASMJIT_STATIC)
  set(ASMJIT_STATIC TRUE)
 endif()

-set(ASMJIT_DIR             "${CMAKE_CURRENT_LIST_DIR}" CACHE PATH "Location of 'asmjit'")
-set(ASMJIT_TEST            "${ASMJIT_TEST}"            CACHE BOOL "Build 'asmjit' test applications")
-set(ASMJIT_EMBED           "${ASMJIT_EMBED}"           CACHE BOOL "Embed 'asmjit' library (no targets)")
-set(ASMJIT_STATIC          "${ASMJIT_STATIC}"          CACHE BOOL "Build 'asmjit' library as static")
-set(ASMJIT_SANITIZE        "${ASMJIT_SANITIZE}"        CACHE STRING "Build with sanitizers: 'address', 'undefined', etc...")
-set(ASMJIT_NO_X86          "${ASMJIT_NO_X86}"          CACHE BOOL "Disable X86/X64 backend")
-set(ASMJIT_NO_AARCH64      "${ASMJIT_NO_AARCH64}"      CACHE BOOL "Disable AArch64 backend")
-set(ASMJIT_NO_FOREIGN      "${ASMJIT_NO_FOREIGN}"      CACHE BOOL "Disable all foreign architectures (enables only a native architecture)")
-set(ASMJIT_NO_NATVIS       "${ASMJIT_NO_NATVIS}"       CACHE BOOL "Disable natvis support (embedding asmjit.natvis in PDB)")
-set(ASMJIT_NO_CUSTOM_FLAGS "${ASMJIT_NO_CUSTOM_FLAGS}" CACHE BOOL "Disable extra compilation flags added by AsmJit to its targets")
+set(ASMJIT_DIR              "${CMAKE_CURRENT_LIST_DIR}"  CACHE PATH "Location of 'asmjit'")
+
+set(ASMJIT_TEST             "${ASMJIT_TEST}"             CACHE BOOL "Build 'asmjit' test applications")
+set(ASMJIT_EMBED            "${ASMJIT_EMBED}"            CACHE BOOL "Embed 'asmjit' library (no targets)")
+set(ASMJIT_STATIC           "${ASMJIT_STATIC}"           CACHE BOOL "Build 'asmjit' library as static")
+set(ASMJIT_SANITIZE         "${ASMJIT_SANITIZE}"         CACHE STRING "Build with sanitizers: 'address', 'undefined', etc...")
+set(ASMJIT_NO_NATVIS        "${ASMJIT_NO_NATVIS}"        CACHE BOOL "Disable natvis support (embedding asmjit.natvis in PDB)")
+set(ASMJIT_NO_CUSTOM_FLAGS  "${ASMJIT_NO_CUSTOM_FLAGS}"  CACHE BOOL "Disable extra compilation flags added by AsmJit to its targets")
+
+set(ASMJIT_NO_X86           "${ASMJIT_NO_X86}"           CACHE BOOL "Disable X86/X64 backend")
+set(ASMJIT_NO_AARCH64       "${ASMJIT_NO_AARCH64}"       CACHE BOOL "Disable AArch64 backend")
+set(ASMJIT_NO_FOREIGN       "${ASMJIT_NO_FOREIGN}"       CACHE BOOL "Disable all foreign architectures (enables only a target architecture)")
+
+set(ASMJIT_NO_DEPRECATED    "${ASMJIT_NO_DEPRECATED}"    CACHE BOOL "Disable deprecated API at build time")
+set(ASMJIT_NO_SHM_OPEN      "${ASMJIT_NO_SHM_OPEN}"      CACHE BOOL "Disable the use of shm_open() even on platforms where it's supported")
+set(ASMJIT_NO_JIT           "${ASMJIT_NO_JIT}"           CACHE BOOL "Disable VirtMem, JitAllocator, and JitRuntime at build time")
+set(ASMJIT_NO_TEXT          "${ASMJIT_NO_TEXT}"          CACHE BOOL "Disable textual representation of instructions, enums, cpu features, ...")
+set(ASMJIT_NO_LOGGING       "${ASMJIT_NO_LOGGING}"       CACHE BOOL "Disable logging features at build time")
+set(ASMJIT_NO_VALIDATION    "${ASMJIT_NO_VALIDATION}"    CACHE BOOL "Disable instruction validation API at build time")
+set(ASMJIT_NO_INTROSPECTION "${ASMJIT_NO_INTROSPECTION}" CACHE BOOL "Disable instruction introspection API at build time")
+set(ASMJIT_NO_BUILDER       "${ASMJIT_NO_BUILDER}"       CACHE BOOL "Disable Builder emitter at build time")
+set(ASMJIT_NO_COMPILER      "${ASMJIT_NO_COMPILER}"      CACHE BOOL "Disable Compiler emitter at build time")

 # AsmJit - Project
 # ================
@@ -155,7 +208,7 @@ function(asmjit_add_target target target_type)
  target_link_libraries(${target} PRIVATE ${X_LIBRARIES})

  # target_link_options was added in cmake v3.13, don't use it for now...
-  foreach(link_flag ${ASMJIT_SANITIZE_LFLAGS})
+  foreach(link_flag ${ASMJIT_PRIVATE_LFLAGS})
    set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " ${link_flag}")
  endforeach()

@@ -183,6 +236,7 @@ set(ASMJIT_CFLAGS "")                            # Public compiler flags.
 set(ASMJIT_PRIVATE_CFLAGS "")                    # Private compiler flags independent of build type.
 set(ASMJIT_PRIVATE_CFLAGS_DBG "")                # Private compiler flags used by debug builds.
 set(ASMJIT_PRIVATE_CFLAGS_REL "")                # Private compiler flags used by release builds.
+set(ASMJIT_PRIVATE_LFLAGS "")                    # Private linker flags.
 set(ASMJIT_SANITIZE_CFLAGS "")                   # Compiler flags required by currently enabled sanitizers.
 set(ASMJIT_SANITIZE_LFLAGS "")                   # Linker flags required by currently enabled sanitizers.

@@ -247,13 +301,44 @@ if (ASMJIT_SANITIZE)
  endif()
 endif()

-# Do not link to pthread on Android as it's part of C runtime.
-if (NOT WIN32 AND NOT ANDROID)
-  list(APPEND ASMJIT_DEPS pthread)
-endif()
+if (NOT WIN32)
+  # Dependency: libc is always required.
+  list(APPEND ASMJIT_DEPS c)

-if ("${CMAKE_SYSTEM_NAME}" MATCHES "Linux" OR "${CMAKE_SYSTEM_NAME}" MATCHES "NetBSD")
-  list(APPEND ASMJIT_DEPS rt)
+  # Dependency: pthread (required so AsmJit can use pthread_lock).
+  if (NOT "${CMAKE_SYSTEM_NAME}" MATCHES "^(Android)$")
+    check_cxx_source_compiles("
+      #include <pthread.h>
+      int main() {
+        pthread_mutex_t m;
+        pthread_mutex_init(&m, nullptr);
+        return pthread_mutex_destroy(&m);
+      }
+      " ASMJIT_LIBC_HAS_PTHREAD)
+    if (ASMJIT_LIBC_HAS_PTHREAD)
+      message("-- Dependency: pthread provided by libc (not linking to libpthread)")
+    else ()
+      message("-- Dependency: pthread not provided by libc, linking to libpthread")
+      list(APPEND ASMJIT_DEPS pthread)
+    endif()
+  endif()
+
+  # Dependency: shm_open (required so AsmJit can use shm_open on supported platforms).
+  if ("${CMAKE_SYSTEM_NAME}" MATCHES "^(Linux|NetBSD)$" AND NOT ASMJIT_NO_SHM_OPEN)
+    check_cxx_source_compiles("
+      #include <sys/mman.h>
+      int main() {
+        const char file_name[1] {};
+        return shm_open(file_name, 0, 0);
+      }
+      " ASMJIT_LIBC_HAS_SHM_OPEN)
+    if (ASMJIT_LIBC_HAS_SHM_OPEN)
+      message("-- Dependency: shm_open provided by libc (not linking to librt)")
+    else ()
+      message("-- Dependency: shm_open not provided by libc, linking to librt")
+      list(APPEND ASMJIT_DEPS rt)
+    endif()
+  endif()
 endif()

 set(ASMJIT_LIBS ${ASMJIT_DEPS})
@@ -276,11 +361,12 @@ foreach(build_option ASMJIT_STATIC
                     ASMJIT_NO_FOREIGN
                     # AsmJit features selection.
                     ASMJIT_NO_DEPRECATED
+                     ASMJIT_NO_SHM_OPEN
                     ASMJIT_NO_JIT
+                     ASMJIT_NO_TEXT
                     ASMJIT_NO_LOGGING
                     ASMJIT_NO_BUILDER
                     ASMJIT_NO_COMPILER
-                     ASMJIT_NO_TEXT
                     ASMJIT_NO_VALIDATION
                     ASMJIT_NO_INTROSPECTION)
  if (${build_option})
--- a/src/asmjit/core/builder.h
+++ b/src/asmjit/core/builder.h
@@ -1432,7 +1432,7 @@ public:
  //!
  //! This is the only function that is called by the `BaseBuilder` to process the code. It passes `zone`,
  //! which will be reset after the `run()` finishes.
-  ASMJIT_API virtual Error run(Zone* zone, Logger* logger) = 0;
+  ASMJIT_API virtual Error run(Zone* zone, Logger* logger);

  //! \}
 };
--- a/src/asmjit/core/compiler.h
+++ b/src/asmjit/core/compiler.h
@@ -712,7 +712,7 @@ public:
  ASMJIT_API Error run(Zone* zone, Logger* logger) override;

  //! Called once per `FuncNode`.
-  ASMJIT_API virtual Error runOnFunction(Zone* zone, Logger* logger, FuncNode* func) = 0;
+  ASMJIT_API virtual Error runOnFunction(Zone* zone, Logger* logger, FuncNode* func);

  //! \}
 };
--- a/src/asmjit/core/emithelper_p.h
+++ b/src/asmjit/core/emithelper_p.h
@@ -31,12 +31,12 @@ public:
  //! slot. This function does not handle register conversion.
  virtual Error emitRegMove(
    const Operand_& dst_,
-    const Operand_& src_, TypeId typeId, const char* comment = nullptr) = 0;
+    const Operand_& src_, TypeId typeId, const char* comment = nullptr);

  //! Emits swap between two registers.
  virtual Error emitRegSwap(
    const BaseReg& a,
-    const BaseReg& b, const char* comment = nullptr) = 0;
+    const BaseReg& b, const char* comment = nullptr);

  //! Emits move from a function argument (either register or stack) to a register.
  //!
@@ -45,7 +45,7 @@ public:
  //! (for example conversion from K to MMX on X86/X64) will fail.
  virtual Error emitArgMove(
    const BaseReg& dst_, TypeId dstTypeId,
-    const Operand_& src_, TypeId srcTypeId, const char* comment = nullptr) = 0;
+    const Operand_& src_, TypeId srcTypeId, const char* comment = nullptr);

  Error emitArgsAssignment(const FuncFrame& frame, const FuncArgsAssignment& args);
 };
--- a/src/asmjit/core/emitter.cpp
+++ b/src/asmjit/core/emitter.cpp
@@ -289,6 +289,12 @@ Error BaseEmitter::embedDataArray(TypeId typeId, const void* data, size_t itemCo
  return DebugUtils::errored(kErrorInvalidState);
 }

+// [[pure virtual]]
+Error BaseEmitter::embedConstPool(const Label& label, const ConstPool& pool) {
+  DebugUtils::unused(label, pool);
+  return DebugUtils::errored(kErrorInvalidState);
+}
+
 // [[pure virtual]]
 Error BaseEmitter::embedLabel(const Label& label, size_t dataSize) {
  DebugUtils::unused(label, dataSize);
@@ -305,7 +311,7 @@ Error BaseEmitter::embedLabelDelta(const Label& label, const Label& base, size_t
 // =====================

 // [[pure virtual]]
-Error comment(const char* data, size_t size = SIZE_MAX) {
+Error BaseEmitter::comment(const char* data, size_t size) {
  DebugUtils::unused(data, size);
  return DebugUtils::errored(kErrorInvalidState);
 }
--- a/src/asmjit/core/emitter.h
+++ b/src/asmjit/core/emitter.h
@@ -557,7 +557,7 @@ public:
  //! \name Sections
  //! \{

-  ASMJIT_API virtual Error section(Section* section) = 0;
+  ASMJIT_API virtual Error section(Section* section);

  //! \}

@@ -565,9 +565,9 @@ public:
  //! \{

  //! Creates a new label.
-  ASMJIT_API virtual Label newLabel() = 0;
+  ASMJIT_API virtual Label newLabel();
  //! Creates a new named label.
-  ASMJIT_API virtual Label newNamedLabel(const char* name, size_t nameSize = SIZE_MAX, LabelType type = LabelType::kGlobal, uint32_t parentId = Globals::kInvalidId) = 0;
+  ASMJIT_API virtual Label newNamedLabel(const char* name, size_t nameSize = SIZE_MAX, LabelType type = LabelType::kGlobal, uint32_t parentId = Globals::kInvalidId);

  //! Creates a new anonymous label with a name, which can only be used for debugging purposes.
  ASMJIT_INLINE_NODEBUG Label newAnonymousLabel(const char* name, size_t nameSize = SIZE_MAX) { return newNamedLabel(name, nameSize, LabelType::kAnonymous); }
@@ -585,7 +585,7 @@ public:
  //! Binds the `label` to the current position of the current section.
  //!
  //! \note Attempt to bind the same label multiple times will return an error.
-  ASMJIT_API virtual Error bind(const Label& label) = 0;
+  ASMJIT_API virtual Error bind(const Label& label);

  //! Tests whether the label `id` is valid (i.e. registered).
  ASMJIT_API bool isLabelValid(uint32_t labelId) const noexcept;
@@ -637,7 +637,7 @@ public:

  //! \cond INTERNAL
  //! Emits an instruction - all 6 operands must be defined.
-  ASMJIT_API virtual Error _emit(InstId instId, const Operand_& o0, const Operand_& o1, const Operand_& o2, const Operand_* oExt) = 0;
+  ASMJIT_API virtual Error _emit(InstId instId, const Operand_& o0, const Operand_& o1, const Operand_& o2, const Operand_* oExt);
  //! Emits instruction having operands stored in array.
  ASMJIT_API virtual Error _emitOpArray(InstId instId, const Operand_* operands, size_t opCount);
  //! \endcond
@@ -661,7 +661,7 @@ public:
  //! The sequence that is used to fill the gap between the aligned location and the current location depends on the
  //! align `mode`, see \ref AlignMode. The `alignment` argument specifies alignment in bytes, so for example when
  //! it's `32` it means that the code buffer will be aligned to `32` bytes.
-  ASMJIT_API virtual Error align(AlignMode alignMode, uint32_t alignment) = 0;
+  ASMJIT_API virtual Error align(AlignMode alignMode, uint32_t alignment);

  //! \}

@@ -669,7 +669,7 @@ public:
  //! \{

  //! Embeds raw data into the \ref CodeBuffer.
-  ASMJIT_API virtual Error embed(const void* data, size_t dataSize) = 0;
+  ASMJIT_API virtual Error embed(const void* data, size_t dataSize);

  //! Embeds a typed data array.
  //!
@@ -680,7 +680,7 @@ public:
  //!
  //!   - Repeat the given data `repeatCount` times, so the data can be used as a fill pattern for example, or as a
  //!     pattern used by SIMD instructions.
-  ASMJIT_API virtual Error embedDataArray(TypeId typeId, const void* data, size_t itemCount, size_t repeatCount = 1) = 0;
+  ASMJIT_API virtual Error embedDataArray(TypeId typeId, const void* data, size_t itemCount, size_t repeatCount = 1);

  //! Embeds int8_t `value` repeated by `repeatCount`.
  ASMJIT_INLINE_NODEBUG Error embedInt8(int8_t value, size_t repeatCount = 1) { return embedDataArray(TypeId::kInt8, &value, 1, repeatCount); }
@@ -707,17 +707,17 @@ public:
  //!   1. Aligns by using AlignMode::kData to the minimum `pool` alignment.
  //!   2. Binds the ConstPool label so it's bound to an aligned location.
  //!   3. Emits ConstPool content.
-  ASMJIT_API virtual Error embedConstPool(const Label& label, const ConstPool& pool) = 0;
+  ASMJIT_API virtual Error embedConstPool(const Label& label, const ConstPool& pool);

  //! Embeds an absolute `label` address as data.
  //!
  //! The `dataSize` is an optional argument that can be used to specify the size of the address data. If it's zero
  //! (default) the address size is deduced from the target architecture (either 4 or 8 bytes).
-  ASMJIT_API virtual Error embedLabel(const Label& label, size_t dataSize = 0) = 0;
+  ASMJIT_API virtual Error embedLabel(const Label& label, size_t dataSize = 0);

  //! Embeds a delta (distance) between the `label` and `base` calculating it as `label - base`. This function was
  //! designed to make it easier to embed lookup tables where each index is a relative distance of two labels.
-  ASMJIT_API virtual Error embedLabelDelta(const Label& label, const Label& base, size_t dataSize = 0) = 0;
+  ASMJIT_API virtual Error embedLabelDelta(const Label& label, const Label& base, size_t dataSize = 0);

  //! \}

@@ -725,7 +725,7 @@ public:
  //! \{

  //! Emits a comment stored in `data` with an optional `size` parameter.
-  ASMJIT_API virtual Error comment(const char* data, size_t size = SIZE_MAX) = 0;
+  ASMJIT_API virtual Error comment(const char* data, size_t size = SIZE_MAX);

  //! Emits a formatted comment specified by `fmt` and variable number of arguments.
  ASMJIT_API Error commentf(const char* fmt, ...);
--- a/src/asmjit/core/errorhandler.h
+++ b/src/asmjit/core/errorhandler.h
@@ -215,7 +215,7 @@ public:
  //!    calling `handleError()`  so `longjmp()` can be used without any issues to cancel the code generation if an
  //!    error occurred. There is no difference between exceptions and `longjmp()` from AsmJit's perspective, however,
  //!    never jump outside of `CodeHolder` and `BaseEmitter` scope as you would leak memory.
-  ASMJIT_API virtual void handleError(Error err, const char* message, BaseEmitter* origin) = 0;
+  ASMJIT_API virtual void handleError(Error err, const char* message, BaseEmitter* origin);

  //! \}
 };
--- a/src/asmjit/core/logger.h
+++ b/src/asmjit/core/logger.h
@@ -90,7 +90,7 @@ public:
  //! The function can accept either a null terminated string if `size` is `SIZE_MAX` or a non-null terminated
  //! string of the given `size`. The function cannot assume that the data is null terminated and must handle
  //! non-null terminated inputs.
-  ASMJIT_API virtual Error _log(const char* data, size_t size) noexcept = 0;
+  ASMJIT_API virtual Error _log(const char* data, size_t size) noexcept;

  //! Logs string `str`, which is either null terminated or having size `size`.
  ASMJIT_INLINE_NODEBUG Error log(const char* data, size_t size = SIZE_MAX) noexcept { return _log(data, size); }
--- a/src/asmjit/core/rapass_p.h
+++ b/src/asmjit/core/rapass_p.h
@@ -945,7 +945,7 @@ public:
  //!      analysis and register allocation.
  //!
  //! Use `RACFGBuilderT` template that provides the necessary boilerplate.
-  virtual Error buildCFG() noexcept = 0;
+  virtual Error buildCFG() noexcept;

  //! Called after the CFG is built.
  Error initSharedAssignments(const ZoneVector<uint32_t>& sharedAssignmentsMap) noexcept;
@@ -1133,7 +1133,7 @@ public:
  //! \{

  Error rewrite() noexcept;
-  virtual Error _rewrite(BaseNode* first, BaseNode* stop) noexcept = 0;
+  virtual Error _rewrite(BaseNode* first, BaseNode* stop) noexcept;

  //! \}

@@ -1153,13 +1153,13 @@ public:
  //! \name Emit
  //! \{

-  virtual Error emitMove(uint32_t workId, uint32_t dstPhysId, uint32_t srcPhysId) noexcept = 0;
-  virtual Error emitSwap(uint32_t aWorkId, uint32_t aPhysId, uint32_t bWorkId, uint32_t bPhysId) noexcept = 0;
+  virtual Error emitMove(uint32_t workId, uint32_t dstPhysId, uint32_t srcPhysId) noexcept;
+  virtual Error emitSwap(uint32_t aWorkId, uint32_t aPhysId, uint32_t bWorkId, uint32_t bPhysId) noexcept;

-  virtual Error emitLoad(uint32_t workId, uint32_t dstPhysId) noexcept = 0;
-  virtual Error emitSave(uint32_t workId, uint32_t srcPhysId) noexcept = 0;
+  virtual Error emitLoad(uint32_t workId, uint32_t dstPhysId) noexcept;
+  virtual Error emitSave(uint32_t workId, uint32_t srcPhysId) noexcept;

-  virtual Error emitJump(const Label& label) noexcept = 0;
+  virtual Error emitJump(const Label& label) noexcept;
  virtual Error emitPreCall(InvokeNode* invokeNode) noexcept;

  //! \}
--- a/src/asmjit/core/virtmem.cpp
+++ b/src/asmjit/core/virtmem.cpp
@@ -81,7 +81,7 @@
  #endif

  // Android NDK doesn't provide `shm_open()` and `shm_unlink()`.
-  #if !defined(__BIONIC__)
+  #if !defined(__BIONIC__) && !defined(ASMJIT_NO_SHM_OPEN)
    #define ASMJIT_HAS_SHM_OPEN
  #endif