HEAD bootstrap error macOS

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HEAD bootstrap error macOS

Gabor Greif-2
Recently I started getting following error:
```
[nix-shell:~/ghc]$ "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall
-optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes
-optc-Wmissing-declarations -optc-Winline -optc-Wpointer-arith
-optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls
-optc-Wno-aggregate-return -optc-Iincludes -optc-Iincludes/dist
-optc-Iincludes/dist-derivedconstants/header
-optc-Iincludes/dist-ghcconstants/header
-optc-Iincludes/dist-install/build -optc-Irts -optc-Irts/dist/build
-optc-DCOMPILING_RTS -optc-DFS_NAMESPACE=rts -optc-fno-strict-aliasing
-optc-fno-common -optc-DDTRACE -optc-Irts/dist/build/./autogen
-optc-Wno-unknown-pragmas -optc-O2 -optc-fomit-frame-pointer -optc-g
-optc-DRtsWay=\"rts_thr\" -static -optc-DTHREADED_RTS  -O0 -H64m -Wall
  -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header
-Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
-Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts
-this-unit-id rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build
-Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen
           -O2 -Wcpp-undef    -Wnoncanonical-monad-instances  -c
rts/sm/Scav_thr.c -o rts/dist/build/sm/Scav_thr.thr_o -v
Glasgow Haskell Compiler, Version 8.11.0.20191222, stage 1 booted by
GHC version 8.6.5
*** initializing package database:
Using binary package database:
/Users/ggreif/ghc/inplace/lib/package.conf.d/package.cache
package flags []
loading package database /Users/ggreif/ghc/inplace/lib/package.conf.d
wired-in package ghc-prim mapped to ghc-prim-0.6.1
wired-in package integer-wired-in mapped to integer-gmp-1.0.2.0
wired-in package base mapped to base-4.14.0.0
wired-in package rts mapped to rts
wired-in package template-haskell mapped to template-haskell-2.16.0.0
wired-in package ghc mapped to ghc-8.11.0.20191222
!!! initializing package database: finished in 8.51 milliseconds,
allocated 8.770 megabytes
Created temporary directory:
/var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
*** systool:cc:
*** C Compiler:
/nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
-x c rts/sm/Scav_thr.c -o
/var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
-fno-common -U__PIC__ -D__PIC__ -Wimplicit -S -O2 -include
/Users/ggreif/ghc/includes/ghcversion.h -Iincludes -Iincludes/dist
-Iincludes/dist-derivedconstants/header
-Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
-Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen
-I/Users/ggreif/ghc/libraries/base/include
-I/Users/ggreif/ghc/libraries/base/dist-install/build/include
-I/Users/ggreif/ghc/libraries/base/dist-install/build/dist-install/build/include
-I/Users/ggreif/ghc/libraries/integer-gmp/include
-I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/include
-I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/dist-install/build/include
-I/Users/ggreif/ghc/rts/dist/build -I/Users/ggreif/ghc/includes
-I/Users/ggreif/ghc/includes/dist-derivedconstants/header
-I/Users/ggreif/ghc/includes/dist-install/build -Xpreprocessor
-DCOMPILING_RTS -Xpreprocessor '-DFS_NAMESPACE=rts' -Xpreprocessor
-DDTRACE -Wall -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-declarations -Winline -Wpointer-arith -Wmissing-noreturn
-Wnested-externs -Wredundant-decls -Wno-aggregate-return -Iincludes
-Iincludes/dist -Iincludes/dist-derivedconstants/header
-Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
-Irts -Irts/dist/build -DCOMPILING_RTS '-DFS_NAMESPACE=rts'
-fno-strict-aliasing -fno-common -DDTRACE -Irts/dist/build/./autogen
-Wno-unknown-pragmas -O2 -fomit-frame-pointer -g '-DRtsWay="rts_thr"'
-DTHREADED_RTS

In file included from rts/sm/Scav_thr.c:3:0: error:

In file included from rts/sm/Scav.c:51:0: error:

In file included from rts/sm/GCUtils.h:18:0: error:

rts/sm/GCTDecl.h:113:1: error:
     error: register '%r13' unsuitable for global register variables
on this target
    |
113 | GCT_REG_DECL(gc_thread*, gct, REG_Base);
    | ^
GCT_REG_DECL(gc_thread*, gct, REG_Base);
^

rts/sm/GCTDecl.h:37:56: error:
     note: expanded from macro 'GCT_REG_DECL'
   |
37 | #define GCT_REG_DECL(type,name,reg) register type name REG(reg);
   |                                                        ^
#define GCT_REG_DECL(type,name,reg) register type name REG(reg);
                                                       ^

includes/stg/MachRegs.h:160:24: error:
     note: expanded from macro 'REG'
    |
160 | #define REG(x) __asm__("%" #x)
    |                        ^
#define REG(x) __asm__("%" #x)
                       ^
1 error generated.
*** Deleting temp files:
Deleting: /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
/var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_2.rsp
Warning: deleting non-existent
/var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
*** Deleting temp dirs:
Deleting: /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
`cc' failed in phase `C Compiler'. (Exit code: 1)
```
My $CC is clang-9 (but I also tried others).

Has anybody seen something similar?

Cheers nd thanks,

     Gabor
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Re: HEAD bootstrap error macOS

Ben Gamari-2
Gabor Greif <[hidden email]> writes:

> Recently I started getting following error:
> ```
> [nix-shell:~/ghc]$ "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall
> -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes
> -optc-Wmissing-declarations -optc-Winline -optc-Wpointer-arith
> -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls
> -optc-Wno-aggregate-return -optc-Iincludes -optc-Iincludes/dist
> -optc-Iincludes/dist-derivedconstants/header
> -optc-Iincludes/dist-ghcconstants/header
> -optc-Iincludes/dist-install/build -optc-Irts -optc-Irts/dist/build
> -optc-DCOMPILING_RTS -optc-DFS_NAMESPACE=rts -optc-fno-strict-aliasing
> -optc-fno-common -optc-DDTRACE -optc-Irts/dist/build/./autogen
> -optc-Wno-unknown-pragmas -optc-O2 -optc-fomit-frame-pointer -optc-g
> -optc-DRtsWay=\"rts_thr\" -static -optc-DTHREADED_RTS  -O0 -H64m -Wall
>   -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header
> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
> -Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts
> -this-unit-id rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build
> -Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen
>            -O2 -Wcpp-undef    -Wnoncanonical-monad-instances  -c
> rts/sm/Scav_thr.c -o rts/dist/build/sm/Scav_thr.thr_o -v
> Glasgow Haskell Compiler, Version 8.11.0.20191222, stage 1 booted by
> GHC version 8.6.5
> *** initializing package database:
> Using binary package database:
> /Users/ggreif/ghc/inplace/lib/package.conf.d/package.cache
> package flags []
> loading package database /Users/ggreif/ghc/inplace/lib/package.conf.d
> wired-in package ghc-prim mapped to ghc-prim-0.6.1
> wired-in package integer-wired-in mapped to integer-gmp-1.0.2.0
> wired-in package base mapped to base-4.14.0.0
> wired-in package rts mapped to rts
> wired-in package template-haskell mapped to template-haskell-2.16.0.0
> wired-in package ghc mapped to ghc-8.11.0.20191222
> !!! initializing package database: finished in 8.51 milliseconds,
> allocated 8.770 megabytes
> Created temporary directory:
> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
> *** systool:cc:
> *** C Compiler:
> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
> -x c rts/sm/Scav_thr.c -o
> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
> -fno-common -U__PIC__ -D__PIC__ -Wimplicit -S -O2 -include
> /Users/ggreif/ghc/includes/ghcversion.h -Iincludes -Iincludes/dist
> -Iincludes/dist-derivedconstants/header
> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
> -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen
> -I/Users/ggreif/ghc/libraries/base/include
> -I/Users/ggreif/ghc/libraries/base/dist-install/build/include
> -I/Users/ggreif/ghc/libraries/base/dist-install/build/dist-install/build/include
> -I/Users/ggreif/ghc/libraries/integer-gmp/include
> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/include
> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/dist-install/build/include
> -I/Users/ggreif/ghc/rts/dist/build -I/Users/ggreif/ghc/includes
> -I/Users/ggreif/ghc/includes/dist-derivedconstants/header
> -I/Users/ggreif/ghc/includes/dist-install/build -Xpreprocessor
> -DCOMPILING_RTS -Xpreprocessor '-DFS_NAMESPACE=rts' -Xpreprocessor
> -DDTRACE -Wall -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes
> -Wmissing-declarations -Winline -Wpointer-arith -Wmissing-noreturn
> -Wnested-externs -Wredundant-decls -Wno-aggregate-return -Iincludes
> -Iincludes/dist -Iincludes/dist-derivedconstants/header
> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
> -Irts -Irts/dist/build -DCOMPILING_RTS '-DFS_NAMESPACE=rts'
> -fno-strict-aliasing -fno-common -DDTRACE -Irts/dist/build/./autogen
> -Wno-unknown-pragmas -O2 -fomit-frame-pointer -g '-DRtsWay="rts_thr"'
> -DTHREADED_RTS
>
> In file included from rts/sm/Scav_thr.c:3:0: error:
>
> In file included from rts/sm/Scav.c:51:0: error:
>
> In file included from rts/sm/GCUtils.h:18:0: error:
>
> rts/sm/GCTDecl.h:113:1: error:
>      error: register '%r13' unsuitable for global register variables
> on this target
>     |
> 113 | GCT_REG_DECL(gc_thread*, gct, REG_Base);
>     | ^
> GCT_REG_DECL(gc_thread*, gct, REG_Base);
> ^
Hmmm, this is quite odd. Is this a clean tree? Have you pulled without
re-./booting and ./configure'ing recently? Are you using Apple's Clang?

In short, we shouldn't be using a register variable at all on OS X
(since Apple's Clang doesn't support register variables, as this error
suggests). Rather, we use TLS. This is implemented here [1]. Perhaps
check what value configure computed for CC_LLVM_BACKEND?

Cheers,

- Ben


[1] https://gitlab.haskell.org/ghc/ghc/blob/master/rts/sm/GCTDecl.h#L69

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Re: HEAD bootstrap error macOS

Gabor Greif-2
This is a clean tree. Modulo
```
$ diff -u mk/build.mk.sample mk/build.mk
--- mk/build.mk.sample 2019-12-07 20:44:48.850209944 +0100
+++ mk/build.mk 2019-11-27 14:18:57.052582066 +0100
@@ -20,7 +20,7 @@
 #BuildFlavour = perf-cross-ncg

 # Fast build with optimised libraries, no profiling (RECOMMENDED):
-#BuildFlavour = quick
+BuildFlavour = quick
```

I see
```
$ grep CC_LLVM_BACKEND config*
config.log:| #define CC_LLVM_BACKEND 1
```

Yes this is with clang-9, but it also happened with clang-7.

I'll try to track this down. The TLS tip is good.

Thanks,

     Gabor

On 12/23/19, Ben Gamari <[hidden email]> wrote:

> Gabor Greif <[hidden email]> writes:
>
>> Recently I started getting following error:
>> ```
>> [nix-shell:~/ghc]$ "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall
>> -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes
>> -optc-Wmissing-declarations -optc-Winline -optc-Wpointer-arith
>> -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls
>> -optc-Wno-aggregate-return -optc-Iincludes -optc-Iincludes/dist
>> -optc-Iincludes/dist-derivedconstants/header
>> -optc-Iincludes/dist-ghcconstants/header
>> -optc-Iincludes/dist-install/build -optc-Irts -optc-Irts/dist/build
>> -optc-DCOMPILING_RTS -optc-DFS_NAMESPACE=rts -optc-fno-strict-aliasing
>> -optc-fno-common -optc-DDTRACE -optc-Irts/dist/build/./autogen
>> -optc-Wno-unknown-pragmas -optc-O2 -optc-fomit-frame-pointer -optc-g
>> -optc-DRtsWay=\"rts_thr\" -static -optc-DTHREADED_RTS  -O0 -H64m -Wall
>>   -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header
>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>> -Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts
>> -this-unit-id rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build
>> -Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen
>>            -O2 -Wcpp-undef    -Wnoncanonical-monad-instances  -c
>> rts/sm/Scav_thr.c -o rts/dist/build/sm/Scav_thr.thr_o -v
>> Glasgow Haskell Compiler, Version 8.11.0.20191222, stage 1 booted by
>> GHC version 8.6.5
>> *** initializing package database:
>> Using binary package database:
>> /Users/ggreif/ghc/inplace/lib/package.conf.d/package.cache
>> package flags []
>> loading package database /Users/ggreif/ghc/inplace/lib/package.conf.d
>> wired-in package ghc-prim mapped to ghc-prim-0.6.1
>> wired-in package integer-wired-in mapped to integer-gmp-1.0.2.0
>> wired-in package base mapped to base-4.14.0.0
>> wired-in package rts mapped to rts
>> wired-in package template-haskell mapped to template-haskell-2.16.0.0
>> wired-in package ghc mapped to ghc-8.11.0.20191222
>> !!! initializing package database: finished in 8.51 milliseconds,
>> allocated 8.770 megabytes
>> Created temporary directory:
>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
>> *** systool:cc:
>> *** C Compiler:
>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>> -x c rts/sm/Scav_thr.c -o
>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
>> -fno-common -U__PIC__ -D__PIC__ -Wimplicit -S -O2 -include
>> /Users/ggreif/ghc/includes/ghcversion.h -Iincludes -Iincludes/dist
>> -Iincludes/dist-derivedconstants/header
>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>> -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen
>> -I/Users/ggreif/ghc/libraries/base/include
>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/include
>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/dist-install/build/include
>> -I/Users/ggreif/ghc/libraries/integer-gmp/include
>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/include
>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/dist-install/build/include
>> -I/Users/ggreif/ghc/rts/dist/build -I/Users/ggreif/ghc/includes
>> -I/Users/ggreif/ghc/includes/dist-derivedconstants/header
>> -I/Users/ggreif/ghc/includes/dist-install/build -Xpreprocessor
>> -DCOMPILING_RTS -Xpreprocessor '-DFS_NAMESPACE=rts' -Xpreprocessor
>> -DDTRACE -Wall -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes
>> -Wmissing-declarations -Winline -Wpointer-arith -Wmissing-noreturn
>> -Wnested-externs -Wredundant-decls -Wno-aggregate-return -Iincludes
>> -Iincludes/dist -Iincludes/dist-derivedconstants/header
>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>> -Irts -Irts/dist/build -DCOMPILING_RTS '-DFS_NAMESPACE=rts'
>> -fno-strict-aliasing -fno-common -DDTRACE -Irts/dist/build/./autogen
>> -Wno-unknown-pragmas -O2 -fomit-frame-pointer -g '-DRtsWay="rts_thr"'
>> -DTHREADED_RTS
>>
>> In file included from rts/sm/Scav_thr.c:3:0: error:
>>
>> In file included from rts/sm/Scav.c:51:0: error:
>>
>> In file included from rts/sm/GCUtils.h:18:0: error:
>>
>> rts/sm/GCTDecl.h:113:1: error:
>>      error: register '%r13' unsuitable for global register variables
>> on this target
>>     |
>> 113 | GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>     | ^
>> GCT_REG_DECL(gc_thread*, gct, REG_Base);
>> ^
> Hmmm, this is quite odd. Is this a clean tree? Have you pulled without
> re-./booting and ./configure'ing recently? Are you using Apple's Clang?
>
> In short, we shouldn't be using a register variable at all on OS X
> (since Apple's Clang doesn't support register variables, as this error
> suggests). Rather, we use TLS. This is implemented here [1]. Perhaps
> check what value configure computed for CC_LLVM_BACKEND?
>
> Cheers,
>
> - Ben
>
>
> [1] https://gitlab.haskell.org/ghc/ghc/blob/master/rts/sm/GCTDecl.h#L69
>
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Re: HEAD bootstrap error macOS

Gabor Greif-2
I see some conflict potential from
```
Configure completed successfully.

   Building GHC version  : 8.11.0.20191222
          Git commit id  : 1c302c6289a6eddc92b48815dd420bd58eb2f286

   Build platform        : x86_64-apple-darwin
   Host platform         : x86_64-apple-darwin
   Target platform       : x86_64-apple-darwin

   Bootstrapping using   :
/nix/store/m7nigmssmx89j5v22r1a83w6fb8cs6qb-ghc-8.6.5/bin/ghc
      which is version   : 8.6.5

>>>   Using (for bootstrapping) : /nix/store/a76n8l1caynyyngdpnyihlrgyr9k9ilg-clang-wrapper-7.1.0/bin/cc
>>>   Using gcc                 : /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
      which is version       : 9.0.0
   Building a cross compiler : NO
   Unregisterised            : NO
   TablesNextToCode          : YES
   hs-cpp       :
/nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
   hs-cpp-flags : -E -undef -traditional -Wno-invalid-pp-token
-Wno-unicode -Wno-trigraphs
```

It is strange that
`/nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc`
is identified as `gcc`. It is `clang`:
```
[nix-shell:~/ghc]$
/nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
--version
clang version 9.0.0 (tags/RELEASE_900/final)
Target: x86_64-apple-darwin17.7.0
Thread model: posix
InstalledDir: /nix/store/mg8gzayayl9sbgdy5hq2km6lxgi9x6dp-clang-9.0.0/bin
```

Cheers,

    Gabor



On 12/23/19, Gabor Greif <[hidden email]> wrote:

> This is a clean tree. Modulo
> ```
> $ diff -u mk/build.mk.sample mk/build.mk
> --- mk/build.mk.sample 2019-12-07 20:44:48.850209944 +0100
> +++ mk/build.mk 2019-11-27 14:18:57.052582066 +0100
> @@ -20,7 +20,7 @@
>  #BuildFlavour = perf-cross-ncg
>
>  # Fast build with optimised libraries, no profiling (RECOMMENDED):
> -#BuildFlavour = quick
> +BuildFlavour = quick
> ```
>
> I see
> ```
> $ grep CC_LLVM_BACKEND config*
> config.log:| #define CC_LLVM_BACKEND 1
> ```
>
> Yes this is with clang-9, but it also happened with clang-7.
>
> I'll try to track this down. The TLS tip is good.
>
> Thanks,
>
>      Gabor
>
> On 12/23/19, Ben Gamari <[hidden email]> wrote:
>> Gabor Greif <[hidden email]> writes:
>>
>>> Recently I started getting following error:
>>> ```
>>> [nix-shell:~/ghc]$ "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall
>>> -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes
>>> -optc-Wmissing-declarations -optc-Winline -optc-Wpointer-arith
>>> -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls
>>> -optc-Wno-aggregate-return -optc-Iincludes -optc-Iincludes/dist
>>> -optc-Iincludes/dist-derivedconstants/header
>>> -optc-Iincludes/dist-ghcconstants/header
>>> -optc-Iincludes/dist-install/build -optc-Irts -optc-Irts/dist/build
>>> -optc-DCOMPILING_RTS -optc-DFS_NAMESPACE=rts -optc-fno-strict-aliasing
>>> -optc-fno-common -optc-DDTRACE -optc-Irts/dist/build/./autogen
>>> -optc-Wno-unknown-pragmas -optc-O2 -optc-fomit-frame-pointer -optc-g
>>> -optc-DRtsWay=\"rts_thr\" -static -optc-DTHREADED_RTS  -O0 -H64m -Wall
>>>   -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header
>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>> -Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts
>>> -this-unit-id rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build
>>> -Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen
>>>            -O2 -Wcpp-undef    -Wnoncanonical-monad-instances  -c
>>> rts/sm/Scav_thr.c -o rts/dist/build/sm/Scav_thr.thr_o -v
>>> Glasgow Haskell Compiler, Version 8.11.0.20191222, stage 1 booted by
>>> GHC version 8.6.5
>>> *** initializing package database:
>>> Using binary package database:
>>> /Users/ggreif/ghc/inplace/lib/package.conf.d/package.cache
>>> package flags []
>>> loading package database /Users/ggreif/ghc/inplace/lib/package.conf.d
>>> wired-in package ghc-prim mapped to ghc-prim-0.6.1
>>> wired-in package integer-wired-in mapped to integer-gmp-1.0.2.0
>>> wired-in package base mapped to base-4.14.0.0
>>> wired-in package rts mapped to rts
>>> wired-in package template-haskell mapped to template-haskell-2.16.0.0
>>> wired-in package ghc mapped to ghc-8.11.0.20191222
>>> !!! initializing package database: finished in 8.51 milliseconds,
>>> allocated 8.770 megabytes
>>> Created temporary directory:
>>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
>>> *** systool:cc:
>>> *** C Compiler:
>>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>>> -x c rts/sm/Scav_thr.c -o
>>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
>>> -fno-common -U__PIC__ -D__PIC__ -Wimplicit -S -O2 -include
>>> /Users/ggreif/ghc/includes/ghcversion.h -Iincludes -Iincludes/dist
>>> -Iincludes/dist-derivedconstants/header
>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>> -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen
>>> -I/Users/ggreif/ghc/libraries/base/include
>>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/include
>>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/dist-install/build/include
>>> -I/Users/ggreif/ghc/libraries/integer-gmp/include
>>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/include
>>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/dist-install/build/include
>>> -I/Users/ggreif/ghc/rts/dist/build -I/Users/ggreif/ghc/includes
>>> -I/Users/ggreif/ghc/includes/dist-derivedconstants/header
>>> -I/Users/ggreif/ghc/includes/dist-install/build -Xpreprocessor
>>> -DCOMPILING_RTS -Xpreprocessor '-DFS_NAMESPACE=rts' -Xpreprocessor
>>> -DDTRACE -Wall -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes
>>> -Wmissing-declarations -Winline -Wpointer-arith -Wmissing-noreturn
>>> -Wnested-externs -Wredundant-decls -Wno-aggregate-return -Iincludes
>>> -Iincludes/dist -Iincludes/dist-derivedconstants/header
>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>> -Irts -Irts/dist/build -DCOMPILING_RTS '-DFS_NAMESPACE=rts'
>>> -fno-strict-aliasing -fno-common -DDTRACE -Irts/dist/build/./autogen
>>> -Wno-unknown-pragmas -O2 -fomit-frame-pointer -g '-DRtsWay="rts_thr"'
>>> -DTHREADED_RTS
>>>
>>> In file included from rts/sm/Scav_thr.c:3:0: error:
>>>
>>> In file included from rts/sm/Scav.c:51:0: error:
>>>
>>> In file included from rts/sm/GCUtils.h:18:0: error:
>>>
>>> rts/sm/GCTDecl.h:113:1: error:
>>>      error: register '%r13' unsuitable for global register variables
>>> on this target
>>>     |
>>> 113 | GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>>     | ^
>>> GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>> ^
>> Hmmm, this is quite odd. Is this a clean tree? Have you pulled without
>> re-./booting and ./configure'ing recently? Are you using Apple's Clang?
>>
>> In short, we shouldn't be using a register variable at all on OS X
>> (since Apple's Clang doesn't support register variables, as this error
>> suggests). Rather, we use TLS. This is implemented here [1]. Perhaps
>> check what value configure computed for CC_LLVM_BACKEND?
>>
>> Cheers,
>>
>> - Ben
>>
>>
>> [1] https://gitlab.haskell.org/ghc/ghc/blob/master/rts/sm/GCTDecl.h#L69
>>
>
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Re: HEAD bootstrap error macOS

Gabor Greif-2
Comparing the above to the (successfully bootstrapping) Darwin CI
job's configure output:
```
   Using (for bootstrapping) : gcc
   Using gcc                 : cc
      which is version       : 11.0.0
```


On 12/23/19, Gabor Greif <[hidden email]> wrote:

> I see some conflict potential from
> ```
> Configure completed successfully.
>
>    Building GHC version  : 8.11.0.20191222
>           Git commit id  : 1c302c6289a6eddc92b48815dd420bd58eb2f286
>
>    Build platform        : x86_64-apple-darwin
>    Host platform         : x86_64-apple-darwin
>    Target platform       : x86_64-apple-darwin
>
>    Bootstrapping using   :
> /nix/store/m7nigmssmx89j5v22r1a83w6fb8cs6qb-ghc-8.6.5/bin/ghc
>       which is version   : 8.6.5
>
>>>>   Using (for bootstrapping) :
>>>> /nix/store/a76n8l1caynyyngdpnyihlrgyr9k9ilg-clang-wrapper-7.1.0/bin/cc
>>>>   Using gcc                 :
>>>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>       which is version       : 9.0.0
>    Building a cross compiler : NO
>    Unregisterised            : NO
>    TablesNextToCode          : YES
>    hs-cpp       :
> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>    hs-cpp-flags : -E -undef -traditional -Wno-invalid-pp-token
> -Wno-unicode -Wno-trigraphs
> ```
>
> It is strange that
> `/nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc`
> is identified as `gcc`. It is `clang`:
> ```
> [nix-shell:~/ghc]$
> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
> --version
> clang version 9.0.0 (tags/RELEASE_900/final)
> Target: x86_64-apple-darwin17.7.0
> Thread model: posix
> InstalledDir: /nix/store/mg8gzayayl9sbgdy5hq2km6lxgi9x6dp-clang-9.0.0/bin
> ```
>
> Cheers,
>
>     Gabor
>
>
>
> On 12/23/19, Gabor Greif <[hidden email]> wrote:
>> This is a clean tree. Modulo
>> ```
>> $ diff -u mk/build.mk.sample mk/build.mk
>> --- mk/build.mk.sample 2019-12-07 20:44:48.850209944 +0100
>> +++ mk/build.mk 2019-11-27 14:18:57.052582066 +0100
>> @@ -20,7 +20,7 @@
>>  #BuildFlavour = perf-cross-ncg
>>
>>  # Fast build with optimised libraries, no profiling (RECOMMENDED):
>> -#BuildFlavour = quick
>> +BuildFlavour = quick
>> ```
>>
>> I see
>> ```
>> $ grep CC_LLVM_BACKEND config*
>> config.log:| #define CC_LLVM_BACKEND 1
>> ```
>>
>> Yes this is with clang-9, but it also happened with clang-7.
>>
>> I'll try to track this down. The TLS tip is good.
>>
>> Thanks,
>>
>>      Gabor
>>
>> On 12/23/19, Ben Gamari <[hidden email]> wrote:
>>> Gabor Greif <[hidden email]> writes:
>>>
>>>> Recently I started getting following error:
>>>> ```
>>>> [nix-shell:~/ghc]$ "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall
>>>> -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes
>>>> -optc-Wmissing-declarations -optc-Winline -optc-Wpointer-arith
>>>> -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls
>>>> -optc-Wno-aggregate-return -optc-Iincludes -optc-Iincludes/dist
>>>> -optc-Iincludes/dist-derivedconstants/header
>>>> -optc-Iincludes/dist-ghcconstants/header
>>>> -optc-Iincludes/dist-install/build -optc-Irts -optc-Irts/dist/build
>>>> -optc-DCOMPILING_RTS -optc-DFS_NAMESPACE=rts -optc-fno-strict-aliasing
>>>> -optc-fno-common -optc-DDTRACE -optc-Irts/dist/build/./autogen
>>>> -optc-Wno-unknown-pragmas -optc-O2 -optc-fomit-frame-pointer -optc-g
>>>> -optc-DRtsWay=\"rts_thr\" -static -optc-DTHREADED_RTS  -O0 -H64m -Wall
>>>>   -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header
>>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>>> -Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts
>>>> -this-unit-id rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build
>>>> -Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen
>>>>            -O2 -Wcpp-undef    -Wnoncanonical-monad-instances  -c
>>>> rts/sm/Scav_thr.c -o rts/dist/build/sm/Scav_thr.thr_o -v
>>>> Glasgow Haskell Compiler, Version 8.11.0.20191222, stage 1 booted by
>>>> GHC version 8.6.5
>>>> *** initializing package database:
>>>> Using binary package database:
>>>> /Users/ggreif/ghc/inplace/lib/package.conf.d/package.cache
>>>> package flags []
>>>> loading package database /Users/ggreif/ghc/inplace/lib/package.conf.d
>>>> wired-in package ghc-prim mapped to ghc-prim-0.6.1
>>>> wired-in package integer-wired-in mapped to integer-gmp-1.0.2.0
>>>> wired-in package base mapped to base-4.14.0.0
>>>> wired-in package rts mapped to rts
>>>> wired-in package template-haskell mapped to template-haskell-2.16.0.0
>>>> wired-in package ghc mapped to ghc-8.11.0.20191222
>>>> !!! initializing package database: finished in 8.51 milliseconds,
>>>> allocated 8.770 megabytes
>>>> Created temporary directory:
>>>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
>>>> *** systool:cc:
>>>> *** C Compiler:
>>>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>>>> -x c rts/sm/Scav_thr.c -o
>>>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
>>>> -fno-common -U__PIC__ -D__PIC__ -Wimplicit -S -O2 -include
>>>> /Users/ggreif/ghc/includes/ghcversion.h -Iincludes -Iincludes/dist
>>>> -Iincludes/dist-derivedconstants/header
>>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>>> -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen
>>>> -I/Users/ggreif/ghc/libraries/base/include
>>>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/include
>>>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/dist-install/build/include
>>>> -I/Users/ggreif/ghc/libraries/integer-gmp/include
>>>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/include
>>>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/dist-install/build/include
>>>> -I/Users/ggreif/ghc/rts/dist/build -I/Users/ggreif/ghc/includes
>>>> -I/Users/ggreif/ghc/includes/dist-derivedconstants/header
>>>> -I/Users/ggreif/ghc/includes/dist-install/build -Xpreprocessor
>>>> -DCOMPILING_RTS -Xpreprocessor '-DFS_NAMESPACE=rts' -Xpreprocessor
>>>> -DDTRACE -Wall -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes
>>>> -Wmissing-declarations -Winline -Wpointer-arith -Wmissing-noreturn
>>>> -Wnested-externs -Wredundant-decls -Wno-aggregate-return -Iincludes
>>>> -Iincludes/dist -Iincludes/dist-derivedconstants/header
>>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>>> -Irts -Irts/dist/build -DCOMPILING_RTS '-DFS_NAMESPACE=rts'
>>>> -fno-strict-aliasing -fno-common -DDTRACE -Irts/dist/build/./autogen
>>>> -Wno-unknown-pragmas -O2 -fomit-frame-pointer -g '-DRtsWay="rts_thr"'
>>>> -DTHREADED_RTS
>>>>
>>>> In file included from rts/sm/Scav_thr.c:3:0: error:
>>>>
>>>> In file included from rts/sm/Scav.c:51:0: error:
>>>>
>>>> In file included from rts/sm/GCUtils.h:18:0: error:
>>>>
>>>> rts/sm/GCTDecl.h:113:1: error:
>>>>      error: register '%r13' unsuitable for global register variables
>>>> on this target
>>>>     |
>>>> 113 | GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>>>     | ^
>>>> GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>>> ^
>>> Hmmm, this is quite odd. Is this a clean tree? Have you pulled without
>>> re-./booting and ./configure'ing recently? Are you using Apple's Clang?
>>>
>>> In short, we shouldn't be using a register variable at all on OS X
>>> (since Apple's Clang doesn't support register variables, as this error
>>> suggests). Rather, we use TLS. This is implemented here [1]. Perhaps
>>> check what value configure computed for CC_LLVM_BACKEND?
>>>
>>> Cheers,
>>>
>>> - Ben
>>>
>>>
>>> [1] https://gitlab.haskell.org/ghc/ghc/blob/master/rts/sm/GCTDecl.h#L69
>>>
>>
>
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Re: HEAD bootstrap error macOS

Gabor Greif-2
This is now resolved. There were some incompatible

includes/ghcautoconf.h
includes/ghcplatform.h
includes/ghcversion.h

files hanging around (probably from a previous Hadrian build)
These never caused trouble, because all the right symbols were defined.
But recently with c2290596f10 some of the symbols changed.

Sorry for the noise.

    Gabor

On 12/24/19, Gabor Greif <[hidden email]> wrote:

> Comparing the above to the (successfully bootstrapping) Darwin CI
> job's configure output:
> ```
>    Using (for bootstrapping) : gcc
>    Using gcc                 : cc
>       which is version       : 11.0.0
> ```
>
>
> On 12/23/19, Gabor Greif <[hidden email]> wrote:
>> I see some conflict potential from
>> ```
>> Configure completed successfully.
>>
>>    Building GHC version  : 8.11.0.20191222
>>           Git commit id  : 1c302c6289a6eddc92b48815dd420bd58eb2f286
>>
>>    Build platform        : x86_64-apple-darwin
>>    Host platform         : x86_64-apple-darwin
>>    Target platform       : x86_64-apple-darwin
>>
>>    Bootstrapping using   :
>> /nix/store/m7nigmssmx89j5v22r1a83w6fb8cs6qb-ghc-8.6.5/bin/ghc
>>       which is version   : 8.6.5
>>
>>>>>   Using (for bootstrapping) :
>>>>> /nix/store/a76n8l1caynyyngdpnyihlrgyr9k9ilg-clang-wrapper-7.1.0/bin/cc
>>>>>   Using gcc                 :
>>>>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>>       which is version       : 9.0.0
>>    Building a cross compiler : NO
>>    Unregisterised            : NO
>>    TablesNextToCode          : YES
>>    hs-cpp       :
>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>>    hs-cpp-flags : -E -undef -traditional -Wno-invalid-pp-token
>> -Wno-unicode -Wno-trigraphs
>> ```
>>
>> It is strange that
>> `/nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc`
>> is identified as `gcc`. It is `clang`:
>> ```
>> [nix-shell:~/ghc]$
>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>> --version
>> clang version 9.0.0 (tags/RELEASE_900/final)
>> Target: x86_64-apple-darwin17.7.0
>> Thread model: posix
>> InstalledDir: /nix/store/mg8gzayayl9sbgdy5hq2km6lxgi9x6dp-clang-9.0.0/bin
>> ```
>>
>> Cheers,
>>
>>     Gabor
>>
>>
>>
>> On 12/23/19, Gabor Greif <[hidden email]> wrote:
>>> This is a clean tree. Modulo
>>> ```
>>> $ diff -u mk/build.mk.sample mk/build.mk
>>> --- mk/build.mk.sample 2019-12-07 20:44:48.850209944 +0100
>>> +++ mk/build.mk 2019-11-27 14:18:57.052582066 +0100
>>> @@ -20,7 +20,7 @@
>>>  #BuildFlavour = perf-cross-ncg
>>>
>>>  # Fast build with optimised libraries, no profiling (RECOMMENDED):
>>> -#BuildFlavour = quick
>>> +BuildFlavour = quick
>>> ```
>>>
>>> I see
>>> ```
>>> $ grep CC_LLVM_BACKEND config*
>>> config.log:| #define CC_LLVM_BACKEND 1
>>> ```
>>>
>>> Yes this is with clang-9, but it also happened with clang-7.
>>>
>>> I'll try to track this down. The TLS tip is good.
>>>
>>> Thanks,
>>>
>>>      Gabor
>>>
>>> On 12/23/19, Ben Gamari <[hidden email]> wrote:
>>>> Gabor Greif <[hidden email]> writes:
>>>>
>>>>> Recently I started getting following error:
>>>>> ```
>>>>> [nix-shell:~/ghc]$ "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall
>>>>> -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes
>>>>> -optc-Wmissing-declarations -optc-Winline -optc-Wpointer-arith
>>>>> -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls
>>>>> -optc-Wno-aggregate-return -optc-Iincludes -optc-Iincludes/dist
>>>>> -optc-Iincludes/dist-derivedconstants/header
>>>>> -optc-Iincludes/dist-ghcconstants/header
>>>>> -optc-Iincludes/dist-install/build -optc-Irts -optc-Irts/dist/build
>>>>> -optc-DCOMPILING_RTS -optc-DFS_NAMESPACE=rts -optc-fno-strict-aliasing
>>>>> -optc-fno-common -optc-DDTRACE -optc-Irts/dist/build/./autogen
>>>>> -optc-Wno-unknown-pragmas -optc-O2 -optc-fomit-frame-pointer -optc-g
>>>>> -optc-DRtsWay=\"rts_thr\" -static -optc-DTHREADED_RTS  -O0 -H64m -Wall
>>>>>   -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header
>>>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>>>> -Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts
>>>>> -this-unit-id rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build
>>>>> -Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen
>>>>>            -O2 -Wcpp-undef    -Wnoncanonical-monad-instances  -c
>>>>> rts/sm/Scav_thr.c -o rts/dist/build/sm/Scav_thr.thr_o -v
>>>>> Glasgow Haskell Compiler, Version 8.11.0.20191222, stage 1 booted by
>>>>> GHC version 8.6.5
>>>>> *** initializing package database:
>>>>> Using binary package database:
>>>>> /Users/ggreif/ghc/inplace/lib/package.conf.d/package.cache
>>>>> package flags []
>>>>> loading package database /Users/ggreif/ghc/inplace/lib/package.conf.d
>>>>> wired-in package ghc-prim mapped to ghc-prim-0.6.1
>>>>> wired-in package integer-wired-in mapped to integer-gmp-1.0.2.0
>>>>> wired-in package base mapped to base-4.14.0.0
>>>>> wired-in package rts mapped to rts
>>>>> wired-in package template-haskell mapped to template-haskell-2.16.0.0
>>>>> wired-in package ghc mapped to ghc-8.11.0.20191222
>>>>> !!! initializing package database: finished in 8.51 milliseconds,
>>>>> allocated 8.770 megabytes
>>>>> Created temporary directory:
>>>>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0
>>>>> *** systool:cc:
>>>>> *** C Compiler:
>>>>> /nix/store/mq8dqgqf2qqkp77pzf3jwc05px8rkbny-clang-wrapper-9.0.0/bin/cc
>>>>> -x c rts/sm/Scav_thr.c -o
>>>>> /var/folders/39/lr50t0q96tx5qp0mzht34r240000gn/T/ghc55616_0/ghc_1.s
>>>>> -fno-common -U__PIC__ -D__PIC__ -Wimplicit -S -O2 -include
>>>>> /Users/ggreif/ghc/includes/ghcversion.h -Iincludes -Iincludes/dist
>>>>> -Iincludes/dist-derivedconstants/header
>>>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>>>> -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen
>>>>> -I/Users/ggreif/ghc/libraries/base/include
>>>>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/include
>>>>> -I/Users/ggreif/ghc/libraries/base/dist-install/build/dist-install/build/include
>>>>> -I/Users/ggreif/ghc/libraries/integer-gmp/include
>>>>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/include
>>>>> -I/Users/ggreif/ghc/libraries/integer-gmp/dist-install/build/dist-install/build/include
>>>>> -I/Users/ggreif/ghc/rts/dist/build -I/Users/ggreif/ghc/includes
>>>>> -I/Users/ggreif/ghc/includes/dist-derivedconstants/header
>>>>> -I/Users/ggreif/ghc/includes/dist-install/build -Xpreprocessor
>>>>> -DCOMPILING_RTS -Xpreprocessor '-DFS_NAMESPACE=rts' -Xpreprocessor
>>>>> -DDTRACE -Wall -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes
>>>>> -Wmissing-declarations -Winline -Wpointer-arith -Wmissing-noreturn
>>>>> -Wnested-externs -Wredundant-decls -Wno-aggregate-return -Iincludes
>>>>> -Iincludes/dist -Iincludes/dist-derivedconstants/header
>>>>> -Iincludes/dist-ghcconstants/header -Iincludes/dist-install/build
>>>>> -Irts -Irts/dist/build -DCOMPILING_RTS '-DFS_NAMESPACE=rts'
>>>>> -fno-strict-aliasing -fno-common -DDTRACE -Irts/dist/build/./autogen
>>>>> -Wno-unknown-pragmas -O2 -fomit-frame-pointer -g '-DRtsWay="rts_thr"'
>>>>> -DTHREADED_RTS
>>>>>
>>>>> In file included from rts/sm/Scav_thr.c:3:0: error:
>>>>>
>>>>> In file included from rts/sm/Scav.c:51:0: error:
>>>>>
>>>>> In file included from rts/sm/GCUtils.h:18:0: error:
>>>>>
>>>>> rts/sm/GCTDecl.h:113:1: error:
>>>>>      error: register '%r13' unsuitable for global register variables
>>>>> on this target
>>>>>     |
>>>>> 113 | GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>>>>     | ^
>>>>> GCT_REG_DECL(gc_thread*, gct, REG_Base);
>>>>> ^
>>>> Hmmm, this is quite odd. Is this a clean tree? Have you pulled without
>>>> re-./booting and ./configure'ing recently? Are you using Apple's Clang?
>>>>
>>>> In short, we shouldn't be using a register variable at all on OS X
>>>> (since Apple's Clang doesn't support register variables, as this error
>>>> suggests). Rather, we use TLS. This is implemented here [1]. Perhaps
>>>> check what value configure computed for CC_LLVM_BACKEND?
>>>>
>>>> Cheers,
>>>>
>>>> - Ben
>>>>
>>>>
>>>> [1] https://gitlab.haskell.org/ghc/ghc/blob/master/rts/sm/GCTDecl.h#L69
>>>>
>>>
>>
>
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