Blame patches/clzip-1.12_pre.local.patch

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diff -ru clzip-1.12.orig/configure clzip-1.12/configure
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--- clzip-1.12.orig/configure	2021-01-01 16:37:55.000000000 +0100
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+++ clzip-1.12/configure	2021-01-13 12:42:25.898898082 +0100
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@@ -22,7 +22,7 @@
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 mandir='$(datarootdir)/man'
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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.