build-sys: make bzip2 really optional
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0ef403877a
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831f18cbf3
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@ -580,11 +580,13 @@ AM_CONDITIONAL(HAVE_ZLIB, [test "$have_zlib" = "yes"])
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# ------------------------------------------------------------------------------
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# ------------------------------------------------------------------------------
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have_bzip2=no
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have_bzip2=no
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AC_ARG_ENABLE(bzip2, AS_HELP_STRING([--enable-bzip2], [Enable optional BZIP2 support]))
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AC_ARG_ENABLE(bzip2, AS_HELP_STRING([--enable-bzip2], [Disable optional BZIP2 support]))
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AS_IF([test "x$enable_bzip2" != "xno"], [
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AS_IF([test "x$enable_bzip2" != "xno"], [
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AC_CHECK_HEADERS(bzlib.h,
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AC_CHECK_HEADERS(bzlib.h,
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[AC_DEFINE(HAVE_BZIP2, 1, [Define in BZIP2 is available]) have_bzip2=yes],
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[AC_DEFINE(HAVE_BZIP2, 1, [Define in BZIP2 is available])
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[AC_MSG_ERROR([*** BZIP2 support requested but headers not found])])
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have_bzip2=yes],
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[AS_IF([test "x$have_bzip2" = xyes], [AC_MSG_ERROR([*** BZIP2 support requested but headers not found])])
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])
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])
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])
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AM_CONDITIONAL(HAVE_BZIP2, [test "$have_bzip2" = "yes"])
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AM_CONDITIONAL(HAVE_BZIP2, [test "$have_bzip2" = "yes"])
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