configure: disable short float with Intel compiler

`short float` support of the Intel C++ Compiler (group of C and C++
compilers), at least versions 18.0 and 19.0, is half-baked. It can
compile declarations of `short float` variables and expressions of
`sizeof(short float)` but cannot compile operations of `short float`
variables. In this situation, `AC_CHECK_TYPES(short float)` defines
`HAVE_SHORT_FLOAT` as 1 and compilation errors occur in
`ompi/mca/op/base/op_base_functions.c`. To avoid this error
tentatively, we disable `short float` support when using the Intel
C++ Compiler.

Signed-off-by: KAWASHIMA Takahiro <[email protected]>

Author: kawashima-fj

configure.ac

@@ -374,6 +374,19 @@ OPAL_CHECK_IDENT([CC], [CFLAGS], [c], [C])
 # Check for some types
 #
 
+# 'short float' support of the Intel C++ Compiler (group of C and C++
+# compilers), at least versions 18.0 and 19.0, is half-baked. It can
+# compile declarations of 'short float' variables and expressions of
+# 'sizeof(short float)' but cannot compile operations of 'short float'
+# variables. In this situation, 'AC_CHECK_TYPES(short float)' defines
+# 'HAVE_SHORT_FLOAT' as 1 and compilation errors occur in
+# ompi/mca/op/base/op_base_functions.c. To avoid this error tentatively,
+# we disable 'short float' support when using the Intel C++ Compiler.
+if test "$opal_cv_c_compiler_vendor" = "intel"; then
+    ac_cv_type_short_float="no"
+    ac_cv_type_short_float__Complex="no"
+fi
+
 AC_CHECK_TYPES(int8_t)
 AC_CHECK_TYPES(uint8_t)
 AC_CHECK_TYPES(int16_t)