forked from enlightenment/efl
Ecore: add a new macro to check if compiler flags are available
SVN revision: 71857
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dnl Copyright (C) 2012 Vincent Torri <vincent dot torri at gmail dot com>
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dnl This code is public domain and can be freely used or copied.
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dnl Macro that check if compiler of linker flags are available
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dnl Macro that checks for a compiler flag availability
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dnl
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dnl EFL_CHECK_COMPILER_FLAG(EFL, FLAG[, ACTION-IF-FOUND[ ,ACTION-IF-NOT-FOUND]])
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dnl AC_SUBST : EFL_CFLAGS (EFL being replaced by its value)
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dnl AM_CONDITIONAL : EFL_HAVE_FLAG (FLAG being replaced by its value)
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AC_DEFUN([EFL_CHECK_COMPILER_FLAG],
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[
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m4_pushdef([UPEFL], m4_translit([$1], [-a-z], [_A-Z]))dnl
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m4_pushdef([UP], m4_translit([$2], [-a-z], [_A-Z]))dnl
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CFLAGS_save="${CFLAGS}"
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CFLAGS="${CFLAGS} $2"
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AC_LANG_PUSH([C])
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AC_MSG_CHECKING([whether the compiler supports $2])
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[]])],
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[have_flag="yes"],
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[have_flag="no"])
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AC_MSG_RESULT([${have_flag}])
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CFLAGS="${CFLAGS_save}"
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AC_LANG_POP([C])
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UPEFL[_CFLAGS]="${UPEFL[_CFLAGS]} [$2]"
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AC_ARG_VAR(UPEFL[_CFLAGS], [preprocessor flags for $2])
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AC_SUBST(UPFEL[_CFLAGS])
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AM_CONDITIONAL([EFL_HAVE]UP, [test "x${have_flag}" = "xyes"])
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m4_popdef([UP])
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m4_popdef([UPEFL])
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])
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dnl Macro that iterates over a sequence of white separated flags
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dnl and that call EFL_CHECK_COMPILER_FLAG() for each of these flags
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dnl
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dnl EFL_CHECK_COMPILER_FLAGS(EFL, FLAGS)
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AC_DEFUN([EFL_CHECK_COMPILER_FLAGS],
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[
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m4_foreach_w([flag], [$2], [EFL_CHECK_COMPILER_FLAG($1, m4_defn([flag]))])
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])
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