From 0e6dd287e701aa21efbec30a26eb2ca12a51965d Mon Sep 17 00:00:00 2001
From: Denis Glazachev <d.glazachev@gmail.com>
Date: Fri, 27 Nov 2020 20:33:16 +0400
Subject: [PATCH] Fix CMake generation and build for native Xcode and
 AppleClang

---
 CMakeLists.txt                  | 20 +++++++++++---------
 cmake/darwin/default_libs.cmake |  8 +-------
 cmake/warnings.cmake            |  2 +-
 3 files changed, 13 insertions(+), 17 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d3bd46d015..1daff973bb1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -154,17 +154,19 @@ endif ()
 # Make sure the final executable has symbols exported
 set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -rdynamic")
 
-find_program (OBJCOPY_PATH NAMES "llvm-objcopy" "llvm-objcopy-11" "llvm-objcopy-10" "llvm-objcopy-9" "llvm-objcopy-8" "objcopy")
-if (OBJCOPY_PATH)
-    message(STATUS "Using objcopy: ${OBJCOPY_PATH}.")
+if (OS_LINUX)
+    find_program (OBJCOPY_PATH NAMES "llvm-objcopy" "llvm-objcopy-11" "llvm-objcopy-10" "llvm-objcopy-9" "llvm-objcopy-8" "objcopy")
+    if (OBJCOPY_PATH)
+        message(STATUS "Using objcopy: ${OBJCOPY_PATH}.")
 
-    if (ARCH_AMD64)
-        set(OBJCOPY_ARCH_OPTIONS -O elf64-x86-64 -B i386)
-    elseif (ARCH_AARCH64)
-        set(OBJCOPY_ARCH_OPTIONS -O elf64-aarch64 -B aarch64)
+        if (ARCH_AMD64)
+            set(OBJCOPY_ARCH_OPTIONS -O elf64-x86-64 -B i386)
+        elseif (ARCH_AARCH64)
+            set(OBJCOPY_ARCH_OPTIONS -O elf64-aarch64 -B aarch64)
+        endif ()
+    else ()
+        message(FATAL_ERROR "Cannot find objcopy.")
     endif ()
-else ()
-    message(FATAL_ERROR "Cannot find objcopy.")
 endif ()
 
 if (OS_DARWIN)
diff --git a/cmake/darwin/default_libs.cmake b/cmake/darwin/default_libs.cmake
index 7b57e63f4ee..4ee1bcdcfbf 100644
--- a/cmake/darwin/default_libs.cmake
+++ b/cmake/darwin/default_libs.cmake
@@ -12,13 +12,7 @@ set(CMAKE_CXX_STANDARD_LIBRARIES ${DEFAULT_LIBS})
 set(CMAKE_C_STANDARD_LIBRARIES ${DEFAULT_LIBS})
 
 # Minimal supported SDK version
-
-set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.15")
-set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.15")
-set (CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mmacosx-version-min=10.15")
-
-set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -mmacosx-version-min=10.15")
-set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -mmacosx-version-min=10.15")
+set(CMAKE_OSX_DEPLOYMENT_TARGET 10.15)
 
 # Global libraries
 
diff --git a/cmake/warnings.cmake b/cmake/warnings.cmake
index c5f3ce47775..8fa4a1129ed 100644
--- a/cmake/warnings.cmake
+++ b/cmake/warnings.cmake
@@ -23,7 +23,7 @@ option (WEVERYTHING "Enable -Weverything option with some exceptions." ON)
 
 # Control maximum size of stack frames. It can be important if the code is run in fibers with small stack size.
 # Only in release build because debug has too large stack frames.
-if ((NOT CMAKE_BUILD_TYPE_UC STREQUAL "DEBUG") AND (NOT SANITIZE))
+if ((NOT CMAKE_BUILD_TYPE_UC STREQUAL "DEBUG") AND (NOT SANITIZE) AND (NOT CMAKE_CXX_COMPILER_ID MATCHES "AppleClang"))
     add_warning(frame-larger-than=32768)
 endif ()