Support mingw gcc and llvm-ming(clang) build.

README.md

@@ -37,7 +37,9 @@ TinyUSDZ is currently in alpha stage. Not usable.
 * C++11 compiler
   * [x] gcc 4.8.5(CentOS 7 default) or later
   * [x] Visual Studio 2017 or later(2015 may OK)
+    * [x] Can be compiled with standalone MSVC compilers(Build Tools for Visual Studio 2017)
   * [x] clang 3.8 or later
+  * [x] llvm-ming(clang) supported
 
 ## USDZ file format
 
@@ -67,6 +69,17 @@ $ cmake ..
 $ make
 ```
 
+#### LLVM-MinGW build
+
+MinGW native and cross-compiling example using llvm-mingw(clang) is provided.
+See `scripts/bootstrap-cmake-mingw-win.sh` and `scripts/bootstrap-cmake-llvm-mingw-cross.sh` for details. 
+
+One of benefit to use llvm-mingw is address sanitizer support on Windows app.
+
+To run app(`.exe`, you'll need `libunwind.dll` and `libc++.dll` on your working directory or search path)
+
+For Windows native build, we assume `ninja.exe` is installed on your system(You can use it from Meson package)
+
 #### CMake build options
 
 * `TINYUSDZ_BUILD_TESTS` : Build tests

cmake/llvm-mingw-cross.cmake

@@ -0,0 +1,24 @@
+SET(CMAKE_SYSTEM_NAME Windows)
+
+IF (DEFINED ENV{LLVM_MINGW_DIR})
+  SET(LLVM_MINGW_ROOT "$ENV{LLVM_MINGW_DIR}")
+ELSE ()
+  SET(LLVM_MINGW_ROOT "/mnt/data/local/llvm-mingw-20200325-ubuntu-18.04")
+ENDIF()
+
+
+SET(CMAKE_C_COMPILER ${LLVM_MINGW_ROOT}/bin/x86_64-w64-mingw32-clang)
+SET(CMAKE_CXX_COMPILER ${LLVM_MINGW_ROOT}/bin/x86_64-w64-mingw32-clang++)
+SET(CMAKE_RC_COMPILER ${LLVM_MINGW_ROOT}/bin/x86_64-w64-mingw32-windres)
+
+#SET(CMAKE_C_LINK_EXECUTABLE x86_64-w64-mingw32-gcc)
+#SET(CMAKE_CXX_LINK_EXECUTABLE x86_64-w64-mingw32-g++)
+
+SET(CMAKE_FIND_ROOT_PATH ${LLVM_MINGW_ROOT}/x86_64-w64-mingw32)
+
+# We may need some advanced thread APIs to compile, so enable 0x601(Win7) if required.
+# SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WIN32_WINNT=0x601")
+
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

cmake/llvm-mingw-win64.cmake

@@ -0,0 +1,20 @@
+SET(CMAKE_SYSTEM_NAME Windows)
+
+IF (DEFINED ENV{LLVM_MINGW_DIR})
+  SET(LLVM_MINGW_ROOT "$ENV{LLVM_MINGW_DIR}")
+ELSE ()
+  SET(LLVM_MINGW_ROOT "C:/ProgramData/llvm-mingw")
+ENDIF()
+
+SET(CMAKE_C_COMPILER ${LLVM_MINGW_ROOT}/bin/x86_64-w64-mingw32-clang.exe)
+SET(CMAKE_CXX_COMPILER ${LLVM_MINGW_ROOT}/bin/x86_64-w64-mingw32-clang++.exe)
+SET(CMAKE_RC_COMPILER ${LLVM_MINGW_ROOT}/bin/x86_64-w64-mingw32-windres.exe)
+
+SET(CMAKE_FIND_ROOT_PATH ${LLVM_MINGW_ROOT}/x86_64-w64-mingw32)
+
+# We may need some advanced thread APIs to compile tinyusz. use 0x601(Win7) if required
+# SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WIN32_WINNT=0x601")
+
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

cmake/mingw64-cross.cmake

@@ -0,0 +1,20 @@
+SET(CMAKE_SYSTEM_NAME Windows)
+
+IF (DEFINED ENV{MINGW_GCC_DIR})
+  SET(MINGW_GCC_ROOT "$ENV{MINGW_GCC_DIR}")
+ELSE ()
+  # Assume mingw cross compiler is installed in your system
+  SET(MINGW_GCC_ROOT "/usr")
+ENDIF()
+
+# win32 may fail to compile with C++11 threads.
+
+SET(CMAKE_C_COMPILER ${MINGW_GCC_ROOT}/bin/x86_64-w64-mingw32-gcc-posix)
+SET(CMAKE_CXX_COMPILER ${MINGW_GCC_ROOT}/bin/x86_64-w64-mingw32-g++-posix)
+SET(CMAKE_RC_COMPILER ${MINGW_GCC_ROOT}/bin/x86_64-w64-mingw32-windres)
+
+SET(CMAKE_FIND_ROOT_PATH ${MINGW_GCC_ROOT}/x86_64-w64-mingw32)
+
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

scripts/bootstrap-cmake-llvm-mingw-cross.sh

@@ -0,0 +1,19 @@
+# llvm-mingw cross compile
+# Assume Ninja is installed on your system
+curdir=`pwd`
+
+# Set path to llvm-mingw in env var.
+export LLVM_MINGW_DIR=/mnt/data/local/llvm-mingw-20200325-ubuntu-18.04/
+
+builddir=${curdir}/build-llvm-mingw
+
+rm -rf ${builddir}
+mkdir ${builddir}
+
+cd ${builddir} && cmake \
+  -DCMAKE_TOOLCHAIN_FILE=${curdir}/cmake/llvm-mingw-cross.cmake \
+  -G "Ninja" \
+  -DCMAKE_VERBOSE_MAKEFILE=1 \
+  ..
+
+cd ${curdir}

scripts/bootstrap-cmake-llvm-mingw-win.sh

@@ -2,15 +2,17 @@
 # Assume Ninja is installed on your system
 curdir=`pwd`
 
-builddir=${curdir}/build
+# Set path to llvm-mingw in env var.
+set LLVM_MINGW_DIR=/d/local/llvm-mingw-20200325-ubuntu-18.04/
+
+builddir=${curdir}/build-llvm-mingw
 
 rm -rf ${builddir}
 mkdir ${builddir}
 
-# Change the path to llvm-mingw to fit into your system.
 cd ${builddir} && cmake \
+  -DCMAKE_TOOLCHAIN_FILE=${curdir}/cmake/llvm-mingw-win64.cmake \
   -G "Ninja" \
-  -DCMAKE_CXX_COMPILER=/d/local/llvm-mingw/bin/x86_64-w64-mingw32-g++.exe \
   -DCMAKE_VERBOSE_MAKEFILE=1 \
   ..
 

scripts/bootstrap-cmake-mingw-gcc-cross.sh

@@ -0,0 +1,17 @@
+# mingw gcc cross compile
+curdir=`pwd`
+
+# Set path to mingw in env var(if required).
+export MINGW_GCC_DIR=/usr
+
+builddir=${curdir}/build-mingw
+
+rm -rf ${builddir}
+mkdir ${builddir}
+
+cd ${builddir} && cmake \
+  -DCMAKE_TOOLCHAIN_FILE=${curdir}/cmake/mingw64-cross.cmake \
+  -DCMAKE_VERBOSE_MAKEFILE=1 \
+  ..
+
+cd ${curdir}