1 dnl opus-intrinsics.m4 2 dnl macro for testing for support for compiler intrinsics, either by default or with a compiler flag 3 4 dnl OPUS_CHECK_INTRINSICS(NAME-OF-INTRINSICS, COMPILER-FLAG-FOR-INTRINSICS, VAR-IF-PRESENT, VAR-IF-DEFAULT, TEST-PROGRAM-HEADER, TEST-PROGRAM-BODY) 5 AC_DEFUN([OPUS_CHECK_INTRINSICS], 6 [ 7 AC_MSG_CHECKING([if compiler supports $1 intrinsics]) 8 AC_LINK_IFELSE( 9 [AC_LANG_PROGRAM($5, $6)], 10 [ 11 $3=1 12 $4=1 13 AC_MSG_RESULT([yes]) 14 ],[ 15 $4=0 16 AC_MSG_RESULT([no]) 17 AC_MSG_CHECKING([if compiler supports $1 intrinsics with $2]) 18 save_CFLAGS="$CFLAGS"; CFLAGS="$CFLAGS $2" 19 AC_LINK_IFELSE([AC_LANG_PROGRAM($5, $6)], 20 [ 21 AC_MSG_RESULT([yes]) 22 $3=1 23 ],[ 24 AC_MSG_RESULT([no]) 25 $3=0 26 ]) 27 CFLAGS="$save_CFLAGS" 28 ]) 29 ]) 30
