Apply trivial CMake fixes based on feedback from RJVB in issue #110

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5a647f326846550f2900dca1415a29106ecafdc0..de26867678fd92bcf99321ed52f40aaa84d854d2 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,8 +98,7 @@ elseif(MSVC)
         message(STATUS "Ignoring WITH_NATIVE_INSTRUCTIONS; not supported on this configuration")
     endif()
 else()
-    execute_process(COMMAND ${CMAKE_C_COMPILER} --version OUTPUT_VARIABLE COMPILER_VERSION)
-    if("${COMPILER_VERSION}" MATCHES "gcc" OR "${COMPILER_VERSION}" MATCHES "GCC" OR "${COMPILER_VERSION}" MATCHES "clang")
+    if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
         set(__GNUC__ ON)
     endif()
     if(WITH_NATIVE_INSTRUCTIONS)
@@ -411,7 +410,7 @@ if(WITH_OPTIM)
             add_definitions(-DX86_SSE4_2_CRC_HASH)
             set(ZLIB_ARCH_SRCS ${ZLIB_ARCH_SRCS} ${ARCHDIR}/insert_string_sse.c)
             add_feature_info(SSE4_CRC 1 "Support CRC hash generation using the SSE4.2 instruction set, using \"${SSE4FLAG}\"")
-            add_intrinsics_option(${SSE4FLAG})
+            add_intrinsics_option("${SSE4FLAG}")
             if(WITH_NEW_STRATEGIES)
                 add_definitions(-DX86_QUICK_STRATEGY)
                 set(ZLIB_ARCH_SRCS ${ZLIB_ARCH_SRCS} ${ARCHDIR}/deflate_quick.c)
@@ -422,13 +421,13 @@ if(WITH_OPTIM)
             add_definitions(-DX86_SSE2_FILL_WINDOW)
             set(ZLIB_ARCH_SRCS ${ZLIB_ARCH_SRCS} ${ARCHDIR}/fill_window_sse.c)
             if(NOT ${ARCH} MATCHES "x86_64")
-                add_intrinsics_option(${SSE2FLAG})
+                add_intrinsics_option("${SSE2FLAG}")
             endif()
         endif()
         if(HAVE_PCLMULQDQ_INTRIN)
             add_definitions(-DX86_PCLMULQDQ_CRC)
             set(ZLIB_ARCH_SRCS ${ZLIB_ARCH_SRCS} ${ARCHDIR}/crc_folding.c ${ARCHDIR}/crc_pclmulqdq.c)
-            add_intrinsics_option(${PCLMULFLAG})
+            add_intrinsics_option("${PCLMULFLAG}")
             if(HAVE_SSE42_INTRIN)
                 add_feature_info(PCLMUL_CRC 1 "Support CRC hash generation using PCLMULQDQ, using \"${PCLMULFLAG}\"")
             else()