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10ea4910e7
The last changes to ast_gcc_attribute.m4 caused some problems checking for various attributes, because the scope of the symbol the attribute is applied to can be important; this patch allows the scope to be specified for the check. git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@200985 65c4cc65-6c06-0410-ace0-fbb531ad65f3
39 lines
994 B
Plaintext
39 lines
994 B
Plaintext
# Helper function to check for gcc attributes.
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# AST_GCC_ATTRIBUTE([attribute name], [attribute syntax], [attribute scope])
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AC_DEFUN([AST_GCC_ATTRIBUTE],
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[
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AC_MSG_CHECKING(for compiler 'attribute $1' support)
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Wall -Wno-unused -Werror"
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if test "x$3" = "x"
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then
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attribute_scope="static"
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else
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attribute_scope="$3"
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fi
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if test "x$2" = "x"
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then
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AC_COMPILE_IFELSE(
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AC_LANG_PROGRAM([$attribute_scope void __attribute__(($1)) *test(void *muffin, ...) {return (void *) 0;}],
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[]),
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AC_MSG_RESULT(yes)
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AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
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AC_MSG_RESULT(no)
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)
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else
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AC_COMPILE_IFELSE(
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AC_LANG_PROGRAM([$attribute_scope void __attribute__(($2)) *test(void *muffin, ...) {return (void *) 0;}],
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[]),
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AC_MSG_RESULT(yes)
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AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
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AC_MSG_RESULT(no)
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)
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fi
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CFLAGS="$saved_CFLAGS"
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]
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)
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