diff --git a/CMakeLists.txt b/CMakeLists.txt
index a734ad1f..c856455b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@ include(CMakePackageConfigHelpers)
 # Needed for CMAKE_DEPENDENT_OPTION macro
 include(CMakeDependentOption)
 
-option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
+option(BUILD_SHARED_LIBS "Build Shared Libraries")
 option(BUILD_EXTERNAL "Build external dependencies in /External" ON)
 
 set(LIB_TYPE STATIC)
@@ -59,7 +59,7 @@ if ("${CMAKE_BUILD_TYPE}" STREQUAL "")
     set(CMAKE_BUILD_TYPE "Debug")
 endif()
 
-option(SKIP_GLSLANG_INSTALL "Skip installation" ${SKIP_GLSLANG_INSTALL})
+option(SKIP_GLSLANG_INSTALL "Skip installation")
 if(NOT ${SKIP_GLSLANG_INSTALL})
   set(ENABLE_GLSLANG_INSTALL ON)
 endif()
@@ -67,8 +67,7 @@ option(ENABLE_SPVREMAPPER "Enables building of SPVRemapper" ON)
 
 option(ENABLE_GLSLANG_BINARIES "Builds glslang and spirv-remap" ON)
 
-option(ENABLE_GLSLANG_JS
-    "If using Emscripten, build glslang.js. Otherwise, builds a sample executable for binary-size testing." OFF)
+option(ENABLE_GLSLANG_JS "If using Emscripten, build glslang.js. Otherwise, builds a sample executable for binary-size testing.")
 CMAKE_DEPENDENT_OPTION(ENABLE_EMSCRIPTEN_SINGLE_FILE
     "If using Emscripten, enables SINGLE_FILE build"
     OFF "ENABLE_GLSLANG_JS AND EMSCRIPTEN"
@@ -79,14 +78,14 @@ CMAKE_DEPENDENT_OPTION(ENABLE_EMSCRIPTEN_ENVIRONMENT_NODE
     OFF)
 
 option(ENABLE_HLSL "Enables HLSL input support" ON)
-option(ENABLE_RTTI "Enables RTTI" OFF)
-option(ENABLE_EXCEPTIONS "Enables Exceptions" OFF)
+option(ENABLE_RTTI "Enables RTTI")
+option(ENABLE_EXCEPTIONS "Enables Exceptions")
 option(ENABLE_OPT "Enables spirv-opt capability if present" ON)
 
 if(MINGW OR (CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND ${CMAKE_CXX_COMPILER_ID} MATCHES "GNU"))
     # Workaround for CMake behavior on Mac OS with gcc, cmake generates -Xarch_* arguments
     # which gcc rejects
-    option(ENABLE_PCH "Enables Precompiled header" OFF)
+    option(ENABLE_PCH "Enables Precompiled header")
 else()
     option(ENABLE_PCH "Enables Precompiled header" ON)
 endif()
@@ -263,7 +262,7 @@ if(BUILD_EXTERNAL AND IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/External)
     add_subdirectory(External)
 endif()
 
-option(ALLOW_EXTERNAL_SPIRV_TOOLS "Allows to build against installed SPIRV-Tools-opt" OFF)
+option(ALLOW_EXTERNAL_SPIRV_TOOLS "Allows to build against installed SPIRV-Tools-opt")
 if(NOT TARGET SPIRV-Tools-opt)
     if(ALLOW_EXTERNAL_SPIRV_TOOLS)
         # Look for external SPIR-V Tools build, if not building in-tree