replace zsh'ism(?) with a posix parameter expansion for CFLAGS default.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15166 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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@@ -1174,7 +1174,7 @@ dnl
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dnl this magic incantation is needed to prevent AC_PROG_CC from setting the
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dnl this magic incantation is needed to prevent AC_PROG_CC from setting the
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dnl default CFLAGS (something like "-g -O2") - we don't need this as add
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dnl default CFLAGS (something like "-g -O2") - we don't need this as add
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dnl -g and -O flags ourselves below
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dnl -g and -O flags ourselves below
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CFLAGS=${CFLAGS=}
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CFLAGS=${CFLAGS:=}
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AC_PROG_CC
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AC_PROG_CC
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dnl is -traditional needed for correct compilations
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dnl is -traditional needed for correct compilations
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@@ -1191,7 +1191,7 @@ dnl defines GXX empty if not using gxx
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dnl defines CXXFLAGS
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dnl defines CXXFLAGS
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dnl
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dnl
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dnl see CFLAGS line above
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dnl see CFLAGS line above
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CXXFLAGS=${CXXFLAGS=}
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CXXFLAGS=${CXXFLAGS:=}
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AC_PROG_CXX
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AC_PROG_CXX
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AC_LANG_RESTORE
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AC_LANG_RESTORE
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