1 dnl Copyright (C) 2012 Vincent Torri <vincent dot torri at gmail dot com>
2 dnl This code is public domain and can be freely used or copied.
4 dnl Macro that check if compiler of linker flags are available
7 dnl Macro that checks for a compiler flag availability
9 dnl EFL_CHECK_COMPILER_FLAG(EFL, FLAG[, ACTION-IF-FOUND[ ,ACTION-IF-NOT-FOUND]])
10 dnl AC_SUBST : EFL_CFLAGS (EFL being replaced by its value)
11 dnl AM_CONDITIONAL : EFL_HAVE_FLAG (FLAG being replaced by its value)
13 AC_DEFUN([EFL_CHECK_COMPILER_FLAG],
15 m4_pushdef([UPEFL], m4_translit([[$1]], [-a-z], [_A-Z]))
16 m4_pushdef([UP], m4_translit([[$2]], [-a-z], [_A-Z]))
18 dnl store in options -Wfoo if -Wno-foo is passed
19 option=m4_bpatsubst([[$2]], [-Wno-], [-W])
21 CFLAGS_save="${CFLAGS}"
22 CFLAGS="${CFLAGS} ${option}"
25 AC_MSG_CHECKING([whether the compiler supports $2])
28 [AC_LANG_PROGRAM([[]])],
31 AC_MSG_RESULT([${have_flag}])
33 CFLAGS="${CFLAGS_save}"
36 if test "x${have_flag}" = "xyes" ; then
37 UPEFL[_CFLAGS]="${UPEFL[_CFLAGS]} [$2]"
39 AC_ARG_VAR(UPEFL[_CFLAGS], [preprocessor flags for $2])
40 AC_SUBST(UPEFL[_CFLAGS])
42 AM_CONDITIONAL([EFL_HAVE]UP, [test "x${have_flag}" = "xyes"])
48 dnl Macro that iterates over a sequence of white separated flags
49 dnl and that call EFL_CHECK_COMPILER_FLAG() for each of these flags
51 dnl EFL_CHECK_COMPILER_FLAGS(EFL, FLAGS)
53 AC_DEFUN([EFL_CHECK_COMPILER_FLAGS],
55 m4_foreach_w([flag], [$2], [EFL_CHECK_COMPILER_FLAG([$1], m4_defn([flag]))])