simd128: cmake options

After this, the required options for cmake are listed below:
```
-DCMAKE_C_FLAGS="-msimd128"
-DCMAKE_TOOLCHAIN_FILE=/path/to/wasi-sdk-19.0/share/cmake/wasi-sdk.cmake
-DWASI_SDK_PREFIX=/path/to/wasi-sdk-19.0
-DCGLM_USE_TEST=ON
```
If compiling to wasi with simd128 support, `-DCMAKE_C_FLAGS="-msimd128"` can be removed.
If tests are not needed, `-DCGLM_USE_TEST=ON` can be removed.

CMakeLists.txt

@@ -16,6 +16,11 @@ option(CGLM_STATIC "Static build" OFF)
 option(CGLM_USE_C99 "" OFF)
 option(CGLM_USE_TEST "Enable Tests" OFF)
 
+if(CMAKE_SYSTEM_NAME STREQUAL WASI)
+  set(CGLM_STATIC ON CACHE BOOL "Static option" FORCE)
+  set(CGLM_SHARED OFF CACHE BOOL "Shared option" FORCE)
+endif()
+
 if(NOT CGLM_STATIC AND CGLM_SHARED)
   set(CGLM_BUILD SHARED)
 else(CGLM_STATIC)

test/CMakeLists.txt

@@ -22,6 +22,11 @@ set(TEST_RUNNER_PARAMS "")
 add_executable(${TEST_MAIN} ${TESTFILES})
 target_compile_definitions(${TEST_MAIN} PRIVATE CGLM_DEFINE_PRINTS=1)
 
+if(CMAKE_SYSTEM_NAME STREQUAL WASI)
+  target_compile_definitions(${TEST_MAIN} PRIVATE _WASI_EMULATED_PROCESS_CLOCKS=1)
+  target_link_options(${TEST_MAIN} PRIVATE "-lwasi-emulated-process-clocks")
+endif()
+
 if(NOT MSVC)
   target_link_libraries(${TEST_MAIN} PRIVATE m)
 endif()