2019-05-11 22:16:17 +01:00
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{ lib, version, hostPlatform
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, gnatboot ? null
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, langAda ? false
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, langJava ? false
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, langGo }:
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2019-11-10 20:05:59 +00:00
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assert langJava -> lib.versionOlder version "7";
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2019-05-11 22:16:17 +01:00
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assert langAda -> gnatboot != null;
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2019-11-10 20:05:59 +00:00
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lib.optionalString (hostPlatform.isSunOS && hostPlatform.is64bit) ''
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export NIX_LDFLAGS=`echo $NIX_LDFLAGS | sed -e s~$prefix/lib~$prefix/lib/amd64~g`
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export LDFLAGS_FOR_TARGET="-Wl,-rpath,$prefix/lib/amd64 $LDFLAGS_FOR_TARGET"
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export CXXFLAGS_FOR_TARGET="-Wl,-rpath,$prefix/lib/amd64 $CXXFLAGS_FOR_TARGET"
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export CFLAGS_FOR_TARGET="-Wl,-rpath,$prefix/lib/amd64 $CFLAGS_FOR_TARGET"
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'' + lib.optionalString (lib.versionOlder version "7" && (langJava || langGo)) ''
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export lib=$out;
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2019-05-11 22:16:17 +01:00
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'' + lib.optionalString langAda ''
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export PATH=${gnatboot}/bin:$PATH
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2019-11-10 20:05:59 +00:00
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''
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2020-03-19 04:08:58 +00:00
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# NOTE 2020/3/18: This environment variable prevents configure scripts from
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# detecting the presence of aligned_alloc on Darwin. There are many facts that
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# collectively make this fix necessary:
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# - Nix uses a fixed set of standard library headers on all MacOS systems,
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# regardless of their actual version. (Nix uses version 10.12 headers.)
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# - Nix uses the native standard library binaries for the build system. That
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# means the standard library binaries may not exactly match the standard
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# library headers.
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# - The aligned_alloc procedure is present in MacOS 10.15 (Catalina), but not
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# in earlier versions. Therefore on Catalina systems, aligned_alloc is
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# linkable (i.e. present in the binary libraries) but not present in the
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# headers.
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# - Configure scripts detect a procedure's existence by checking whether it is
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# linkable. They do not check whether it is present in the headers.
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# - GCC throws an error during compilation because aligned_alloc is not
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# defined in the headers---even though the linker can see it.
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#
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# This fix would not be necessary if ANY of the above were false:
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# - If Nix used native headers for each different MacOS version, aligned_alloc
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# would be in the headers on Catalina.
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# - If Nix used the same libary binaries for each MacOS version, aligned_alloc
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# would not be in the library binaries.
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# - If Catalina did not include aligned_alloc, this wouldn't be a problem.
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# - If the configure scripts looked for header presence as well as
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# linkability, they would see that aligned_alloc is missing.
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# - If GCC allowed implicit declaration of symbols, it would not fail during
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# compilation even if the configure scripts did not check header presence.
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#
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+ lib.optionalString (hostPlatform.isDarwin) ''
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export ac_cv_func_aligned_alloc=no
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''
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