alan_2: add -fcommon workaround for gcc-10
Without the change the build against upstream gcc-10 build fails as: ld: smScSema.o:/build/source/compiler/smScSema.c:135: multiple definition of `charset'; options.o:/build/source/compiler/options.c:16: first defined here Use -fcommon as a workeround until upstream updates the code.
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@ -14,6 +14,10 @@ stdenv.mkDerivation rec {
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makefile = "Makefile.unix";
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makefile = "Makefile.unix";
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# Add a workarounf for -fno-common tollchains like upstream gcc-10.
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# alan-3 is already fixed, but the backport is nontrivial.
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NIX_CFLAGS_COMPILE = "-fcommon";
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installPhase = ''
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installPhase = ''
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mkdir -p $out/bin $out/share/alan2
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mkdir -p $out/bin $out/share/alan2
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cp compiler/alan $out/bin/alan2
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cp compiler/alan $out/bin/alan2
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