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15 lines
465 B
Diff
15 lines
465 B
Diff
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diff --git a/source/configure.ac b/source/configure.ac
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index d194c6d..33fcb2f 100644
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--- a/source/configure.ac
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+++ b/source/configure.ac
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@@ -208,6 +208,8 @@ fi
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#AC_CHECK_PROG(AUTOCONF, autoconf, autoconf, true)
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#AC_CHECK_PROG(STRIP, strip, strip, true)
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+m4_ifndef([AX_CHECK_COMPILE_FLAG], [AC_MSG_ERROR(['autoconf-archive' is missing])])
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+
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# TODO(ICU-20301): Remove fallback to Python 2.
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AC_CHECK_PROGS(PYTHON, python3 "py -3" python "py")
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AC_SUBST(PYTHON)
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