Fix for Solaris x86_64.

Makefile.am

@@ -3,6 +3,7 @@ snzip_SOURCES = snzip.c snzip.h snzip-format.c framing-format.c framing2-format.
 if HAVE_SSE4_2
 snzip_SOURCES += crc32_sse4_2.c
 endif
+snzip_LDFLAGS = @LDFLAGS_SSE4_2@
 CFLAGS_SSE4_2 = @CFLAGS_SSE4_2@
 PROGS = snzip
 bin_PROGRAMS = $(PROGS)

clearcap.map

@@ -0,0 +1,2 @@
+# This is used only for Solaris Studio to clear hardware capability flags.
+hwcap_1 = V0x0 OVERRIDE;

configure.ac

@@ -45,18 +45,43 @@ AC_CHECK_MEMBERS([struct stat.st_mtimensec, struct stat.st_mtim.tv_nsec, struct
 # unlocked stdio functions
 AC_CHECK_FUNCS(getc_unlocked putc_unlocked fread_unlocked fwrite_unlocked ferror_unlocked feof_unlocked)
 
-# Check SSE4.2
-AC_MSG_CHECKING(whether -msse4.2 is accepted as CFLAGS)
-saved_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS -msse4.2"
-AC_TRY_COMPILE([], [],
-    [AC_MSG_RESULT(yes); CFLAGS_SSE4_2=-msse4.2],
-    [AC_MSG_RESULT(no); CFLAGS_SSE4_2=])
-AC_SUBST([CFLAGS_SSE4_2])
+AC_ARG_ENABLE([sse4_2],
+    [AS_HELP_STRING([--disable-sse4_2],
+        [don't use sse4.2 to calculate crc32])],
+    [],
+    [])
+
+CFLAGS_SSE4_2=
+LDFLAGS_SSE4_2=
+AS_IF([test "x$enable_sse4_2" != xno],
+    [
+        AC_MSG_CHECKING(SSE4.2 CFLAGS)
+        AS_IF([test "x$GCC" = xyes],
+              [CFLAGS_SSE4_2=-msse4.2],
+              [AS_CASE(["$host_os"],
+                  [solaris*], [CFLAGS_SSE4_2=-xarch=sse4_2;
+                               LDFLAGS_SSE4_2=-Wl,-M,clearcap.map
+                              ])
+              ])
+        AS_IF([test "$CFLAGS_SSE4_2"],
+              [AC_MSG_RESULT($CFLAGS_SSE4_2)],
+              [AC_MSG_RESULT()])
+    ])
 
-AC_CHECK_DECLS([_mm_crc32_u32], [], [], [#include <nmmintrin.h>])
-CFLAGS="$saved_CFLAGS"
+AS_IF([test "$CFLAGS_SSE4_2"],
+    [
+        AC_MSG_CHECKING([whether $CFLAGS_SSE4_2 is accepted as CFLAGS])
+        saved_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS $CFLAGS_SSE4_2"
+        AC_TRY_COMPILE([], [],
+            [AC_MSG_RESULT(yes)],
+            [AC_MSG_RESULT(no); CFLAGS_SSE4_2=; LDFLAGS_SSE4_2=])
 
+        AC_CHECK_DECLS([_mm_crc32_u32], [], [], [#include <nmmintrin.h>])
+        CFLAGS="$saved_CFLAGS"
+    ])
+AC_SUBST([CFLAGS_SSE4_2])
+AC_SUBST([LDFLAGS_SSE4_2])
 AS_IF([test "x$ac_cv_have_decl__mm_crc32_u32" = xyes],
     [AC_DEFINE([HAVE_SSE4_2], 1, [Define to 1 if you have SSE4.2])])
 AM_CONDITIONAL([HAVE_SSE4_2], [test "x$ac_cv_have_decl__mm_crc32_u32" = xyes])

crc32.c

@@ -773,64 +773,86 @@ multitable_crc32c(uint32_t crc32c,
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of the authors.
  */
-#if defined _MSC_VER && _MSC_VER >= 1400
+#define CPUID_SSE4_2_IS_SET(x) (((x) & (1u << 20)) ? 1 : 0)
+
+#if defined __GNUC__
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+#include <cpuid.h>
+#define USE_GCC_INTRINSIC 1 /* gcc 4.3 or later */
+#else
+#define USE_GCC_ASM 1
+#endif
+#endif
+
+#if defined __SUNPRO_C && __SUNPRO_C >= 0x590
+#define USE_GCC_ASM 1 /* Sun Studio 12 or later */
+#endif
+
+#if defined _MSC_VER
+#if _MSC_VER >= 1400
 #include <intrin.h>
+#define USE_MSVC_INTRINSIC 1 /* Visual Studio 2005 or later */
+#else
+#define USE_MSVC_ASM 1
 #endif
-#if defined __GNUC__ && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
-#include <cpuid.h>
 #endif
 
-#define CPUID_ECX_BIT_SSE4_2 (1u << 20)
+#if defined USE_GCC_INTRINSIC
+static int sse4_2_is_available(void)
+{
+	unsigned int eax, ebx, ecx, edx;
+	__cpuid(1, eax, ebx, ecx, edx);
+	return CPUID_SSE4_2_IS_SET(ecx);
+}
 
+#elif defined USE_GCC_ASM
 static int sse4_2_is_available(void)
 {
-#if defined __GNUC__ /* GNU C Compiler */
-#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
-	/* gcc version >= 4.3 */
-	unsigned int eax_, ebx_, ecx_, edx_;
-	__cpuid(1, eax_, ebx_, ecx_, edx_);
-#else
-	/* gcc version < 4.3 */
-	unsigned int ecx_;
-#if defined(__i386__) && defined(__PIC__)
+	unsigned int ecx;
+#if (defined(__i386__) || defined(__i386)) && defined(__PIC__)
 	__asm(
 		"movl $1, %%eax;"
 		"pushl %%ebx;"
 		"cpuid;"
 		"popl %%ebx;"
-		: "=c" (ecx_)
+		: "=c" (ecx)
 		:
 		: "eax", "edx");
 #else
 	__asm(
 		"movl $1, %%eax;"
 		"cpuid;"
-		: "=c" (ecx_)
+		: "=c" (ecx)
 		:
 		: "eax", "ebx", "edx");
 #endif
-#endif
-#elif defined _MSC_VER /* Microsoft Visual C++ */
-#if _MSC_VER >= 1400
-	/* msvc version >= 2005 */
-	int cpuinfo[4], ecx_;
+	return CPUID_SSE4_2_IS_SET(ecx);
+}
+
+#elif defined USE_MSVC_INTRINSIC
+static int sse4_2_is_available(void)
+{
+	int cpuinfo[4];
 	__cpuid(cpuinfo, 1);
-	ecx_ = cpuinfo[2];
-#else
-	/* msvc version < 2005 */
-	unsigned int ecx_;
+	return CPUID_SSE4_2_IS_SET(cpuinfo[2]);
+}
+
+#elif defined USE_MSVC_ASM
+static int sse4_2_is_available(void)
+{
+	unsigned int rv;
 	__asm {
 		mov eax, 1
 		cpuid
-		mov ecx_, ecx
+		mov rv, ecx
 	}
-#endif
-#else /* Other compilers */
-#error unsupported compiler
-#endif
-	return (ecx_ & CPUID_ECX_BIT_SSE4_2) ? 1 : 0;
+	return CPUID_SSE4_2_IS_SET(rv);
 }
 
+#else
+#error unsupported compiler to use cpuid instruction. run 'configure' with --disable-sse4_2
+#endif
+
 static uint32_t select_crc32c_func(uint32_t crc32c, const unsigned char *buffer,unsigned int length);
 
 static uint32_t (*crc32c_func)(uint32_t, const unsigned char *, unsigned int) = select_crc32c_func;