diff options
| author | Jonathan Lennox <jonathan@vidyo.com> | 2015-08-03 17:04:20 -0400 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2015-09-01 17:21:31 -0400 |
| commit | b4aa5dc858c905d9b09e70794584c44f7f4d2f7a (patch) | |
| tree | 51e9425b9ffb925071d92f43e511f6856a604476 /m4 | |
| parent | 56d850412a2fc40bedb162de5e4b506bda2a5f4e (diff) | |
| download | opus-b4aa5dc858c905d9b09e70794584c44f7f4d2f7a.tar.gz | |
Reorganize configure's detection of intrinsics functions:
Actually try to compile intrinsics rather than using the output of --help.
Allow caller of configure script to set custom compiler options to enable intrinsics.
Detect when intrinsics are always available, without needing special compiler options.
Make naming of #defines for detected intrinsics support more systematic.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/opus-intrinsics.m4 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/m4/opus-intrinsics.m4 b/m4/opus-intrinsics.m4 new file mode 100644 index 00000000..b93ddd38 --- /dev/null +++ b/m4/opus-intrinsics.m4 @@ -0,0 +1,29 @@ +dnl opus-intrinsics.m4 +dnl macro for testing for support for compiler intrinsics, either by default or with a compiler flag + +dnl OPUS_CHECK_INTRINSICS(NAME-OF-INTRINSICS, COMPILER-FLAG-FOR-INTRINSICS, VAR-IF-PRESENT, VAR-IF-DEFAULT, TEST-PROGRAM-HEADER, TEST-PROGRAM-BODY) +AC_DEFUN([OPUS_CHECK_INTRINSICS], +[ + AC_MSG_CHECKING([if compiler supports $1 intrinsics]) + AC_LINK_IFELSE( + [AC_LANG_PROGRAM($5, $6)], + [ + $3=1 + $4=1 + AC_MSG_RESULT([yes]) + ],[ + $4=0 + AC_MSG_RESULT([no]) + AC_MSG_CHECKING([if compiler supports $1 intrinsics with $2]) + save_CFLAGS="$CFLAGS"; CFLAGS="$2 $CFLAGS" + AC_LINK_IFELSE([AC_LANG_PROGRAM($5, $6)], + [ + AC_MSG_RESULT([yes]) + $3=1 + ],[ + AC_MSG_RESULT([no]) + $3=0 + ]) + CFLAGS="$save_CFLAGS" + ]) +]) |