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@ -27,6 +27,16 @@ |
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assert cloog != null -> stdenv.lib.versionOlder version "5"; |
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assert langJava -> stdenv.lib.versionOlder version "7"; |
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# Note [Windows Exception Handling] |
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# sjlj (short jump long jump) exception handling makes no sense on x86_64, |
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# it's forcably slowing programs down as it produces a constant overhead. |
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# On x86_64 we have SEH (Structured Exception Handling) and we should use |
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# that. On i686, we do not have SEH, and have to use sjlj with dwarf2. |
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# Hence it's now conditional on x86_32 (i686 is 32bit). |
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# |
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# ref: https://stackoverflow.com/questions/15670169/what-is-difference-between-sjlj-vs-dwarf-vs-seh |
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let |
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inherit (stdenv) |
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buildPlatform hostPlatform targetPlatform |
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@ -60,7 +70,9 @@ let |
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"--disable-debug" |
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"--disable-win32-registry" |
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] ++ lib.optionals (crossMingw && targetPlatform.isx86_32) [ |
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# See Note [Windows Exception Handling] |
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"--enable-sjlj-exceptions" |
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"--with-dwarf2" |
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] else [ |
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(if crossDarwin then "--with-sysroot=${lib.getLib libcCross}/share/sysroot" |
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else "--with-headers=${lib.getDev libcCross}${libcCross.incdir or "/include"}") |
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@ -87,9 +99,6 @@ let |
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"--disable-nls" |
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# To keep ABI compatibility with upstream mingw-w64 |
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"--enable-fully-dynamic-string" |
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] ++ lib.optionals (crossMingw && targetPlatform.isx86_32) [ |
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"--enable-sjlj-exceptions" |
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"--with-dwarf2" |
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] ++ lib.optional (targetPlatform.libc == "newlib") "--with-newlib" |
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++ lib.optional (targetPlatform.libc == "avrlibc") "--with-avrlibc" |
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); |
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