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@@ -181,7 +181,7 @@ AC_DEFUN([EGG_CHECK_CCWALL],
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fi
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fi
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])
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])
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-dnl @synopsis CXX_FLAGS_CHECK [var] [compiler flags] [cache name] [required]
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+dnl @synopsis CXX_FLAG_CHECK [var] [compiler flags] [cache name] [required]
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dnl @summary check whether compiler supports given C++ flags or not
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dnl @summary check whether compiler supports given C++ flags or not
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AC_DEFUN([CXX_FLAG_CHECK],
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AC_DEFUN([CXX_FLAG_CHECK],
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[
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[
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@@ -211,6 +211,36 @@ EOF
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fi
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fi
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])
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])
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+dnl @synopsis CXX_FLAG_CHECK_LINK [var] [compiler flags] [cache name] [required]
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+dnl @summary check whether linker supports given C++ flags or not
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+AC_DEFUN([CXX_FLAG_CHECK_LINK],
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+[
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+ AC_CACHE_CHECK([whether the linker supports $2], ax_cv_prog_cc_$3, [
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+ AC_LANG_PUSH([C++])
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+ ac_saved_flags="$CXXFLAGS"
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+ CXXFLAGS="-Werror $2"
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+ AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
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+ [ax_cv_prog_cc_$3="yes"],
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+ [ax_cv_prog_cc_$3="no"],
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+ )
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+ CXXFLAGS="$ac_saved_flags"
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+ AC_LANG_POP([C++])
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+ ])
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+
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+ if [[ "$ax_cv_prog_cc_$3" = "yes" ]]; then
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+ $1="$$1 $2"
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+ elif [[ -n "$4" ]]; then
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+ cat << 'EOF' >&2
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+configure: error:
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+
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+ Your OS or C++ compiler does not support $2.
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+ This compile flag is required.
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+
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+EOF
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+ exit 1
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+ fi
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+])
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+
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dnl Fix GCC lame compiler paths (FreeBSD)
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dnl Fix GCC lame compiler paths (FreeBSD)
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dnl @summary check whether compiler requires -rpath for libstdc++.so
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dnl @summary check whether compiler requires -rpath for libstdc++.so
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AC_DEFUN([CXX_RPATH_CHECK],
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AC_DEFUN([CXX_RPATH_CHECK],
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