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commit 12321e9f8a2e21c0c801ad1efe5cf448a0fd7f02 Author: Alan M. Carroll <[email protected]> AuthorDate: Wed Apr 7 08:26:08 2021 -0500 Fix use of -mcx16 flag - only use if it compiles cleanly. (#7684) (cherry picked from commit b05c5bea4f0669fd7e6d994b8b854ef920fc09fb) --- configure.ac | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/configure.ac b/configure.ac index f07dc28..dbe0b6c 100644 --- a/configure.ac +++ b/configure.ac @@ -1565,6 +1565,8 @@ __saved_CXXFLAGS="${CXXFLAGS}" __saved_CFLAGS="${CFLAGS}" has_128bit_cas=0 +# Don't add the -mcx16 flag unless needed and it compiles cleanly. +needs_mcx16_for_cas=0 TS_TRY_COMPILE_NO_WARNING([],[ __int128_t x = 0; @@ -1583,6 +1585,7 @@ TS_TRY_COMPILE_NO_WARNING([],[ ], [ AC_MSG_RESULT(yes) has_128bit_cas=1 + needs_mcx16_for_cas=1 ], [ AC_MSG_RESULT(no) ]) @@ -1593,11 +1596,9 @@ CFLAGS="${__saved_CFLAGS}" AC_LANG_POP AC_SUBST(has_128bit_cas) -AS_IF([test "x$has_128bit_cas" = "x1"], [ - AS_IF([test "x$ax_cv_c_compiler_vendor" != "xintel"], [ +AS_IF([test "x$needs_mcx16_for_cas" = "x1"], [ TS_ADDTO(AM_CFLAGS, [-mcx16]) TS_ADDTO(AM_CXXFLAGS, [-mcx16]) - ]) ]) # Check for POSIX capabilities library.
