Fix check for IBM xl compilers for v13.1 and later.

By default newer xlc compilers only define __ibmxl__ now.

https://www.ibm.com/support/knowledgecenter/en/SSXVZZ_13.1.6/com.ibm.xlcpp1316.lelinux.doc/compiler_ref/xlmacros.html
Signed-off-by: Austen Lauria <[email protected]>

Author: awlauria

config/opal_check_vendor.m4

@@ -123,7 +123,7 @@ AC_DEFUN([_OPAL_CHECK_COMPILER_VENDOR], [
 
     # IBM XL C/C++
     AS_IF([test "$opal_check_compiler_vendor_result" = "unknown"],
-          [OPAL_IF_IFELSE([defined(__xlC__) || defined(__IBMC__) || defined(__IBMCPP__)],
+          [OPAL_IF_IFELSE([defined(__xlC__) || defined(__IBMC__) || defined(__IBMCPP__) || defined(__ibmxl__)],
                [opal_check_compiler_vendor_result="ibm"
                 xlc_major_version=`$CC -qversion 2>&1 | tail -n 1 | cut -d ' ' -f 2 | cut -d '.' -f 1`
                 xlc_minor_version=`$CC -qversion 2>&1 | tail -n 1 | cut -d ' ' -f 2 | cut -d '.' -f 2`

opal/include/opal/opal_portable_platform.h

@@ -171,7 +171,7 @@
        /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
 #    endif
 
-#elif defined(__xlC__)
+#elif defined(__xlC__) || defined(__ibmxl__) || defined(__IBMC__) || defined(__IBMCPP__)
 #    define PLATFORM_COMPILER_XLC  1
 #    define PLATFORM_COMPILER_FAMILYNAME XLC
 #    define PLATFORM_COMPILER_FAMILYID 5

opal/include/opal/sys/powerpc/atomic.h

@@ -107,7 +107,7 @@ void opal_atomic_isync(void)
  *********************************************************************/
 #if OPAL_GCC_INLINE_ASSEMBLY
 
-#ifdef __xlC__
+#if defined(__xlC__) || defined(__IBMC__) || defined(__IBMCPP__) || defined(__ibmxl__)
 /* work-around bizzare xlc bug in which it sign-extends
    a pointer to a 32-bit signed integer */
 #define OPAL_ASM_ADDR(a) ((uintptr_t)a)