32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
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# Check if a given symbol is declared using a certain header.
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# Check whether SYMBOL (a function, variable, or constant) is declared.
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# AST_C_DECLARE_CHECK([package], [symbol], [header file], [version])
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AC_DEFUN([AST_C_DECLARE_CHECK],
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[
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if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
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AC_MSG_CHECKING([for $2 declared in $3])
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saved_cppflags="${CPPFLAGS}"
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if test "x${$1_DIR}" != "x"; then
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$1_INCLUDE="-I${$1_DIR}/include"
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fi
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CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}"
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AC_COMPILE_IFELSE(
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[ AC_LANG_PROGRAM( [#include <$3>],
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[#if !defined($2)
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(void) $2;
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#endif
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])],
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[ AC_MSG_RESULT(yes)
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PBX_$1=1
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AC_DEFINE([HAVE_$1], 1, [Define if your system has $2 declared.])
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m4_ifval([$4], [AC_DEFINE([HAVE_$1_VERSION], $4, [Define $1 headers version])])
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],
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[ AC_MSG_RESULT(no) ]
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)
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CPPFLAGS="${saved_cppflags}"
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fi
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])
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