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improve handling of API calls provided by loaded modules through use of some GCC features; this makes app_stack's usage of AGI APIs even cleaner, and will allow it to work 'as expected' either with or without res_agi being loaded

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reviewed at http://reviewboard.digium.com/r/62



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@159631 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2008-11-26 21:20:50 +00:00
parent aa0e888629
commit e14dfcbedc
9 changed files with 834 additions and 62 deletions
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22
autoconf/ast_gcc_attribute.m4
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@@ -1,17 +1,31 @@
# Helper function to check for gcc attributes.
# AST_GCC_ATTRIBUTE([attribute name])
# AST_GCC_ATTRIBUTE([attribute name], [attribute syntax])
AC_DEFUN([AST_GCC_ATTRIBUTE],
[
AC_MSG_CHECKING(for compiler 'attribute $1' support)
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
if test "x$2" = "x"
then
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM([void __attribute__(($1)) *test(void *muffin, ...) {}],
[]),
AC_MSG_RESULT(yes)
AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
AC_MSG_RESULT(no))
]
CFLAGS="$saved_CFLAGS"
AC_MSG_RESULT(no)
)
else
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM([void __attribute__(($2)) *test(void *muffin, ...) {}],
[]),
AC_MSG_RESULT(yes)
AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
AC_MSG_RESULT(no)
)
fi
CFLAGS="$saved_CFLAGS"
]
)