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773 |
jeremybenn |
dnl CACHED_TRY_COMPILE(<description>,<cachevar>,<include>,<program>,<ifyes>,<ifno>)
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AC_DEFUN([CACHED_TRY_COMPILE],[
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AC_MSG_CHECKING($1)
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AC_CACHE_VAL($2,[
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$3]], [[$4]])],[$2=yes],[$2=no])
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])
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if test "x$$2" = xyes; then
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true
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$5
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else
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true
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$6
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fi
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])
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dnl GCC_ATTRIBUTE(<short-label>,<cachevar>,<func-params>,<attribute>,<HAVE>,<desc>,[<true-cmds>],[<false-cmds>])
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AC_DEFUN([GCC_ATTRIBUTE],[
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CACHED_TRY_COMPILE(__attribute__(($1)),gcc_cv_c_gcc_attribute_$2,,
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[extern int testfunction($3) __attribute__(($4))],
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_GNUC25_$5,,$6)
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$7,
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AC_MSG_RESULT(no)
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$8)
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])
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AC_DEFUN([GCC_ATTRIBUTE_SUPPORTED],[
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GCC_ATTRIBUTE([,,],supported,[int x],[,,],ATTRIB,[Define if function attributes a la GCC 2.5 and higher are available.])
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AH_BOTTOM([/* GNU C attributes. */
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#ifndef FUNCATTR
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#ifdef HAVE_GNUC25_ATTRIB
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#define FUNCATTR(x) __attribute__(x)
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#else
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#define FUNCATTR(x)
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#endif
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#endif])
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])
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AC_DEFUN([GCC_ATTRIBUTE_CONST],[
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AC_REQUIRE([GCC_ATTRIBUTE_SUPPORTED])
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GCC_ATTRIBUTE(const,const,[int x],const,CONST,[Define if constant functions a la GCC 2.5 and higher are available.])
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AH_BOTTOM([/* GNU C constant functions, or null. */
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#ifndef ATTRCONST
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#ifdef HAVE_GNUC25_CONST
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#define ATTRCONST const
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#else
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#define ATTRCONST
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#endif
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#endif
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#ifndef CONSTANT
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#define CONSTANT FUNCATTR((ATTRCONST))
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#endif])
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])
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AC_DEFUN([GCC_ATTRIBUTE_NORETURN],[
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AC_REQUIRE([GCC_ATTRIBUTE_SUPPORTED])
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GCC_ATTRIBUTE(noreturn,noreturn,[int x],noreturn,NORETURN,[Define if nonreturning functions a la GCC 2.5 and higher are available.])
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AH_BOTTOM([/* GNU C nonreturning functions, or null. */
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#ifndef ATTRNORETURN
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#ifdef HAVE_GNUC25_NORETURN
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#define ATTRNORETURN noreturn
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#else /* ! HAVE_GNUC25_NORETURN */
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#define ATTRNORETURN
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#endif /* HAVE_GNUC25_NORETURN */
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#endif /* ATTRNORETURN */
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#ifndef NONRETURNING
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#define NONRETURNING FUNCATTR((ATTRNORETURN))
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#endif /* NONRETURNING */])
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])
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AC_DEFUN([GCC_ATTRIBUTE_UNUSED],[
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AC_REQUIRE([GCC_ATTRIBUTE_SUPPORTED])
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GCC_ATTRIBUTE(unused,unused,[int x],unused,UNUSED,[Define if unused variables la GCC 2.5 and higher are available.])
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AH_BOTTOM([/* GNU C unused functions, or null. */
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#ifndef ATTRUNUSED
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#ifdef HAVE_GNUC25_UNUSED
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#define ATTRUNUSED unused
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#else
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#define ATTRUNUSED
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#endif
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#endif
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#ifndef UNUSED
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#define UNUSED FUNCATTR((ATTRUNUSED))
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#endif])
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])
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AC_DEFUN([GCC_ATTRIBUTE_FORMAT],[
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AC_REQUIRE([GCC_ATTRIBUTE_SUPPORTED])
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GCC_ATTRIBUTE(format...,format,[char *y, ...],[format(printf,1,2)],PRINTFFORMAT,[Define if printf-format argument lists a la GCC are available.])
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AH_BOTTOM([/* GNU C printf formats, or null. */
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#ifndef ATTRPRINTF
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#ifdef HAVE_GNUC25_PRINTFFORMAT
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#define ATTRPRINTF(si,tc) format(printf,si,tc)
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#else
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#define ATTRPRINTF(si,tc)
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#endif
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#endif
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#ifndef PRINTFFORMAT
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#define PRINTFFORMAT(si,tc) FUNCATTR((ATTRPRINTF(si,tc)))
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#endif
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#ifndef NONRETURNPRINTFFORMAT
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#define NONRETURNPRINTFFORMAT(si,tc) FUNCATTR((ATTRPRINTF(si,tc),ATTRNORETURN))
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#endif])
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])
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AC_DEFUN([GCC_ATTRIBUTE_ALWAYS_INLINE],[
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AC_REQUIRE([GCC_ATTRIBUTE_SUPPORTED])
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GCC_ATTRIBUTE(always_inline,always_inline,[int x],always_inline,ALWAYS_INLINE,[Define if unconditional inlining of functions a la GCC 3.1 and higher are available.])
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AH_BOTTOM([/* GNU C constant functions, or null. */
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#ifndef ATTRALWAYS_INLINE
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#ifdef HAVE_GNUC25_ALWAYS_INLINE
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#define ATTRALWAYS_INLINE always_inline
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#else
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#define ATTRALWAYS_INLINE
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#endif
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#endif
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#ifndef ALWAYS_INLINE
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#define ALWAYS_INLINE FUNCATTR((ATTRALWAYS_INLINE))
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#endif])
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])
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AC_DEFUN([GCC_ATTRIBUTE_PACKED],[
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AC_REQUIRE([GCC_ATTRIBUTE_SUPPORTED])
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GCC_ATTRIBUTE(packed,packed,[int x],packed,PACKED,[Define if packing of struct members a la GCC 2.5 and higher is available.])
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AH_BOTTOM([/* GNU C constant functions, or null. */
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#ifndef ATTRPACKED
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#ifdef HAVE_GNUC25_PACKED
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#define ATTRPACKED packed
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#else
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#define ATTRPACKED
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#endif
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#endif
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#ifndef PACKED
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#define PACKED FUNCATTR((ATTRPACKED))
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#endif])
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])
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