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annotate src/fftw-3.3.3/m4/ax_check_compiler_flags.m4 @ 23:619f715526df sv_v2.1

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Update Vamp plugin SDK to 2.5
author Chris Cannam
date Thu, 09 May 2013 10:52:46 +0100
parents 37bf6b4a2645
children
rev   line source
Chris@10 1 dnl @synopsis AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE])
Chris@10 2 dnl @summary check whether FLAGS are accepted by the compiler
Chris@10 3 dnl @category Misc
Chris@10 4 dnl
Chris@10 5 dnl Check whether the given compiler FLAGS work with the current language's
Chris@10 6 dnl compiler, or whether they give an error. (Warnings, however, are
Chris@10 7 dnl ignored.)
Chris@10 8 dnl
Chris@10 9 dnl ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
Chris@10 10 dnl success/failure.
Chris@10 11 dnl
Chris@10 12 dnl @version 2005-05-30
Chris@10 13 dnl @license GPLWithACException
Chris@10 14 dnl @author Steven G. Johnson <stevenj@alum.mit.edu> and Matteo Frigo.
Chris@10 15 AC_DEFUN([AX_CHECK_COMPILER_FLAGS],
Chris@10 16 [AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
Chris@10 17 AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1])
Chris@10 18 dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
Chris@10 19 AS_LITERAL_IF([$1],
Chris@10 20 [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1), [
Chris@10 21 ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
Chris@10 22 _AC_LANG_PREFIX[]FLAGS="$1"
Chris@10 23 AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
Chris@10 24 AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=yes,
Chris@10 25 AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=no)
Chris@10 26 _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])],
Chris@10 27 [ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
Chris@10 28 _AC_LANG_PREFIX[]FLAGS="$1"
Chris@10 29 AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
Chris@10 30 eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=yes,
Chris@10 31 eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=no)
Chris@10 32 _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])
Chris@10 33 eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)
Chris@10 34 AC_MSG_RESULT($ax_check_compiler_flags)
Chris@10 35 if test "x$ax_check_compiler_flags" = xyes; then
Chris@10 36 m4_default([$2], :)
Chris@10 37 else
Chris@10 38 m4_default([$3], :)
Chris@10 39 fi
Chris@10 40 ])dnl AX_CHECK_COMPILER_FLAGS