Blame patches/ed-1.18_pre.local.patch

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diff -ru ed-1.17.orig/configure ed-1.17/configure
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--- ed-1.17.orig/configure	2021-01-06 14:06:29.000000000 +0100
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+++ ed-1.17/configure	2021-01-13 12:29:03.995851327 +0100
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@@ -23,7 +23,7 @@
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 program_prefix=
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 CC=gcc
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 CPPFLAGS=
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-CFLAGS='-Wall -W -O2'
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+CFLAGS ?= '-Wall -W -O2'
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 LDFLAGS=
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 # checking whether we are using GNU C.