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Todd Fiala

2014-Feb-04 00:33 UTC

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

First error: head file related.  Strangely, this code has been there a
while, which makes me think that the HAVE_ARC4RANDOM is somehow now showing
up as set whereas perhaps it didn't used to be.

tfiala at tfiala2:~/lldb/svn/lgs/build$ make
make[1]: Entering directory `/mnt/ssd/work/svn/lgs/build/lib/Support'
llvm[1]: Compiling Process.cpp for Debug+Asserts build
In file included from
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Process.cpp:103:0:
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc: In static member
function ‚Äòstatic unsigned int llvm::sys::Process::GetRandomNumber()‚Äô:
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:368:21: error:
‚Äòarc4random‚Äô was not declared in this scope
   return arc4random();
                     ^
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:374:1: warning:
control reaches end of non-void function [-Wreturn-type]
 }
 ^
/bin/rm: cannot remove
`/mnt/ssd/work/svn/lgs/build/lib/Support/Debug+Asserts/Process.d.tmp': No
such file or directory
make[1]: ***
[/mnt/ssd/work/svn/lgs/build/lib/Support/Debug+Asserts/Process.o] Error 1
make[1]: Leaving directory `/mnt/ssd/work/svn/lgs/build/lib/Support'
make: *** [all] Error 1

If I add #include <bsd/stdlib.h>, I get past that:

Index: lib/Support/Unix/Process.inc
==================================================================---
lib/Support/Unix/Process.inc (revision 200620)
+++ lib/Support/Unix/Process.inc (working copy)
@@ -38,6 +38,9 @@
 #ifdef HAVE_TERMIOS_H
 #  include <termios.h>
 #endif
+#if defined(HAVE_ARC4RANDOM)
+#  include <bsd/stdlib.h>
+#endif

 //===----------------------------------------------------------------------===//
 //=== WARNING: Implementation here must contain only generic UNIX code that

Then I start fixing up link errors like the following that now require
-lbsd:

make[2]: Entering directory `/mnt/ssd/work/svn/lgs/build/utils/fpcmp'
llvm[2]: Linking Debug+Asserts executable fpcmp
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
In function `llvm::sys::Process::GetRandomNumber()':
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[2]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/fpcmp] Error 1
make[2]: Leaving directory `/mnt/ssd/work/svn/lgs/build/utils/fpcmp'
make[1]: *** [fpcmp/.makeall] Error 2
make[1]: Leaving directory `/mnt/ssd/work/svn/lgs/build/utils'
make: *** [all] Error 1

That'll get resolved with something like this (don't know how many
platforms would need this fix - this should definitely bee ifdef guarded).

tfiala at tfiala2:/mnt/ssd/work/svn/lgs/llvm/utils/fpcmp$ svn diff Makefile
Index: Makefile
==================================================================--- Makefile  
(revision 200725)
+++ Makefile    (working copy)
@@ -12,5 +12,7 @@
 USEDLIBS = LLVMSupport.a
 NO_INSTALL = 1

+LDFLAGS += "-lbsd"
+
 include $(LEVEL)/Makefile.common

But this is just one of several (more below):

llvm[4]: Building Debug+Asserts Archive Library libclang.a
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
In function `llvm::sys::Process::GetRandomNumber()':
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/diagtool] Error
1
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/diagtool'
make[3]: *** [diagtool/.makeall] Error 2
make[3]: *** Waiting for unfinished jobs....
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
In function `llvm::sys::Process::GetRandomNumber()':
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang-format]
Error 1
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/clang-format'
make[3]: *** [clang-format/.makeall] Error 2
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
In function `llvm::sys::Process::GetRandomNumber()':
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/arcmt-test]
Error 1
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/arcmt-test'
make[3]: *** [arcmt-test/.makeall] Error 2
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
In function `llvm::sys::Process::GetRandomNumber()':
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang-check]
Error 1
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/clang-check'
make[3]: *** [clang-check/.makeall] Error 2
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/libclang'
make[4]: Entering directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/c-index-test'
llvm[4]: Compiling c-index-test.c for Debug+Asserts build
llvm[4]: Linking Debug+Asserts executable c-index-test
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libclang.so: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/c-index-test]
Error 1
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/c-index-test'
make[3]: *** [all] Error 1
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
In function `llvm::sys::Process::GetRandomNumber()':
/mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
reference to `arc4random'
collect2: error: ld returned 1 exit status
make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang] Error 1
make[4]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/tools/clang/tools/driver'
make[3]: *** [driver/.makeall] Error 2

We've got it confirmed on another machine here.

We build with gcc 4.8.2, Ubuntu 12.04 x86_64, configure-based, with the
only non-Ubuntu components being the gcc and a newer libedit required by
some recent changes to lldb.

Generally this has been rock solid.  I don't know if something caused
the HAVE_ARC4RANDOM
flag to change all of a sudden, but if it did, it happened to two machines
simultaneously.

Any thoughts?

On Mon, Feb 3, 2014 at 4:08 PM, Eric Christopher <echristo at gmail.com>
wrote:
> Ah. Weird. I'm not seeing anything. Can you paste the errors you're
seeing?
>
> -eric
>
>
> On Mon, Feb 3, 2014 at 3:57 PM, Todd Fiala <tfiala at google.com>
wrote:
>
>> It's in llvm and clang code.  I haven't gotten to any of the
lldb code
>> yet.
>>
>>
>> On Mon, Feb 3, 2014 at 1:33 PM, Eric Christopher <echristo at
gmail.com>wrote:
>>
>>> Weird. Probably best to send mail to lldb@?
>>>
>>> -eric
>>>
>>>
>>> On Mon, Feb 3, 2014 at 11:24 AM, Todd Fiala <tfiala at
google.com> wrote:
>>>
>>>> Hey all,
>>>>
>>>> FYI -
>>>>
>>>> We're seeing a whole host of errors around requiring
arc4random and
>>>> linkage errors building llvm/clang/lldb from top of tree.  This
is on lldb
>>>> builds with Ubuntu 12.04 x86_64, using gcc 4.8.2 and
configure-based
>>>> builds.  This appeared to crop up sometime since Friday
morning.  What's
>>>> the right fix for that?  Looks to be a dependency on libbsd?
>>>>  --
>>>> Todd Fiala | Software Engineer |  tfiala at google.com | 
650-943-3180
>>>>
>>>> _______________________________________________
>>>> LLVM Developers mailing list
>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>>
>>>>
>>>
>>
>>
>> --
>> Todd Fiala | Software Engineer |  tfiala at google.com |  650-943-3180
>>
>
>

-- 
Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
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Eric Christopher

2014-Feb-04 00:46 UTC

head link

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

Maybe a machine change? Let's take this off list for now and we can update
when we figure it out. I can't duplicate it.

-eric


On Mon, Feb 3, 2014 at 4:33 PM, Todd Fiala <tfiala at google.com> wrote:
> First error: head file related.  Strangely, this code has been there a
> while, which makes me think that the HAVE_ARC4RANDOM is somehow now showing
> up as set whereas perhaps it didn't used to be.
>
> tfiala at tfiala2:~/lldb/svn/lgs/build$ make
> make[1]: Entering directory `/mnt/ssd/work/svn/lgs/build/lib/Support'
> llvm[1]: Compiling Process.cpp for Debug+Asserts build
> In file included from
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Process.cpp:103:0:
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc: In static member
> function 'Äòstatic unsigned int
llvm::sys::Process::GetRandomNumber()'Äô:
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:368:21: error:
> 'Äòarc4random'Äô was not declared in this scope
>    return arc4random();
>                      ^
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:374:1: warning:
> control reaches end of non-void function [-Wreturn-type]
>  }
>  ^
> /bin/rm: cannot remove
> `/mnt/ssd/work/svn/lgs/build/lib/Support/Debug+Asserts/Process.d.tmp':
No
> such file or directory
> make[1]: ***
> [/mnt/ssd/work/svn/lgs/build/lib/Support/Debug+Asserts/Process.o] Error 1
> make[1]: Leaving directory `/mnt/ssd/work/svn/lgs/build/lib/Support'
> make: *** [all] Error 1
>
> If I add #include <bsd/stdlib.h>, I get past that:
>
> Index: lib/Support/Unix/Process.inc
> ==================================================================> ---
lib/Support/Unix/Process.inc (revision 200620)
> +++ lib/Support/Unix/Process.inc (working copy)
> @@ -38,6 +38,9 @@
>  #ifdef HAVE_TERMIOS_H
>  #  include <termios.h>
>  #endif
> +#if defined(HAVE_ARC4RANDOM)
> +#  include <bsd/stdlib.h>
>  +#endif
>
>
> 
//===----------------------------------------------------------------------===//
>  //=== WARNING: Implementation here must contain only generic UNIX code
> that
>
> Then I start fixing up link errors like the following that now require
> -lbsd:
>
> make[2]: Entering directory `/mnt/ssd/work/svn/lgs/build/utils/fpcmp'
> llvm[2]: Linking Debug+Asserts executable fpcmp
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
> In function `llvm::sys::Process::GetRandomNumber()':
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[2]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/fpcmp] Error 1
> make[2]: Leaving directory `/mnt/ssd/work/svn/lgs/build/utils/fpcmp'
> make[1]: *** [fpcmp/.makeall] Error 2
> make[1]: Leaving directory `/mnt/ssd/work/svn/lgs/build/utils'
> make: *** [all] Error 1
>
> That'll get resolved with something like this (don't know how many
> platforms would need this fix - this should definitely bee ifdef guarded).
>
> tfiala at tfiala2:/mnt/ssd/work/svn/lgs/llvm/utils/fpcmp$ svn diff Makefile
> Index: Makefile
> ==================================================================> ---
Makefile    (revision 200725)
> +++ Makefile    (working copy)
> @@ -12,5 +12,7 @@
>  USEDLIBS = LLVMSupport.a
>  NO_INSTALL = 1
>
> +LDFLAGS += "-lbsd"
> +
>  include $(LEVEL)/Makefile.common
>
>
> But this is just one of several (more below):
>
> llvm[4]: Building Debug+Asserts Archive Library libclang.a
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
> In function `llvm::sys::Process::GetRandomNumber()':
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/diagtool]
> Error 1
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/diagtool'
> make[3]: *** [diagtool/.makeall] Error 2
> make[3]: *** Waiting for unfinished jobs....
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
> In function `llvm::sys::Process::GetRandomNumber()':
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang-format]
> Error 1
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/clang-format'
> make[3]: *** [clang-format/.makeall] Error 2
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
> In function `llvm::sys::Process::GetRandomNumber()':
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/arcmt-test]
> Error 1
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/arcmt-test'
> make[3]: *** [arcmt-test/.makeall] Error 2
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
> In function `llvm::sys::Process::GetRandomNumber()':
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang-check]
> Error 1
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/clang-check'
> make[3]: *** [clang-check/.makeall] Error 2
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/libclang'
> make[4]: Entering directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/c-index-test'
> llvm[4]: Compiling c-index-test.c for Debug+Asserts build
> llvm[4]: Linking Debug+Asserts executable c-index-test
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libclang.so: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/c-index-test]
> Error 1
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/c-index-test'
> make[3]: *** [all] Error 1
> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
> In function `llvm::sys::Process::GetRandomNumber()':
> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
> reference to `arc4random'
> collect2: error: ld returned 1 exit status
> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang] Error 1
> make[4]: Leaving directory
> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/driver'
> make[3]: *** [driver/.makeall] Error 2
>
>
> We've got it confirmed on another machine here.
>
> We build with gcc 4.8.2, Ubuntu 12.04 x86_64, configure-based, with the
> only non-Ubuntu components being the gcc and a newer libedit required by
> some recent changes to lldb.
>
> Generally this has been rock solid.  I don't know if something caused
the HAVE_ARC4RANDOM
> flag to change all of a sudden, but if it did, it happened to two machines
> simultaneously.
>
> Any thoughts?
>
>
> On Mon, Feb 3, 2014 at 4:08 PM, Eric Christopher <echristo at
gmail.com>wrote:
>
>> Ah. Weird. I'm not seeing anything. Can you paste the errors
you're
>> seeing?
>>
>> -eric
>>
>>
>> On Mon, Feb 3, 2014 at 3:57 PM, Todd Fiala <tfiala at google.com>
wrote:
>>
>>> It's in llvm and clang code.  I haven't gotten to any of
the lldb code
>>> yet.
>>>
>>>
>>> On Mon, Feb 3, 2014 at 1:33 PM, Eric Christopher <echristo at
gmail.com>wrote:
>>>
>>>> Weird. Probably best to send mail to lldb@?
>>>>
>>>> -eric
>>>>
>>>>
>>>> On Mon, Feb 3, 2014 at 11:24 AM, Todd Fiala <tfiala at
google.com> wrote:
>>>>
>>>>> Hey all,
>>>>>
>>>>> FYI -
>>>>>
>>>>> We're seeing a whole host of errors around requiring
arc4random and
>>>>> linkage errors building llvm/clang/lldb from top of tree. 
This is on lldb
>>>>> builds with Ubuntu 12.04 x86_64, using gcc 4.8.2 and
configure-based
>>>>> builds.  This appeared to crop up sometime since Friday
morning.  What's
>>>>> the right fix for that?  Looks to be a dependency on
libbsd?
>>>>>  --
>>>>> Todd Fiala | Software Engineer |  tfiala at google.com | 
650-943-3180
>>>>>
>>>>> _______________________________________________
>>>>> LLVM Developers mailing list
>>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> Todd Fiala | Software Engineer |  tfiala at google.com | 
650-943-3180
>>>
>>
>>
>
>
> --
> Todd Fiala | Software Engineer |  tfiala at google.com |  650-943-3180
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Todd Fiala

2014-Feb-04 00:47 UTC

head link

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

Ok - sounds good.  Thanks Eric.


On Mon, Feb 3, 2014 at 4:46 PM, Eric Christopher <echristo at gmail.com>
wrote:
> Maybe a machine change? Let's take this off list for now and we can
update
> when we figure it out. I can't duplicate it.
>
> -eric
>
>
> On Mon, Feb 3, 2014 at 4:33 PM, Todd Fiala <tfiala at google.com>
wrote:
>
>> First error: head file related.  Strangely, this code has been there a
>> while, which makes me think that the HAVE_ARC4RANDOM is somehow now
showing
>> up as set whereas perhaps it didn't used to be.
>>
>> tfiala at tfiala2:~/lldb/svn/lgs/build$ make
>> make[1]: Entering directory
`/mnt/ssd/work/svn/lgs/build/lib/Support'
>> llvm[1]: Compiling Process.cpp for Debug+Asserts build
>> In file included from
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Process.cpp:103:0:
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc: In static
member
>> function ‚Äòstatic unsigned int
llvm::sys::Process::GetRandomNumber()‚Äô:
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:368:21: error:
>> ‚Äòarc4random‚Äô was not declared in this scope
>>    return arc4random();
>>                      ^
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:374:1: warning:
>> control reaches end of non-void function [-Wreturn-type]
>>  }
>>  ^
>> /bin/rm: cannot remove
>>
`/mnt/ssd/work/svn/lgs/build/lib/Support/Debug+Asserts/Process.d.tmp': No
>> such file or directory
>> make[1]: ***
>> [/mnt/ssd/work/svn/lgs/build/lib/Support/Debug+Asserts/Process.o] Error
1
>> make[1]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/lib/Support'
>> make: *** [all] Error 1
>>
>> If I add #include <bsd/stdlib.h>, I get past that:
>>
>> Index: lib/Support/Unix/Process.inc
>>
==================================================================>> ---
lib/Support/Unix/Process.inc (revision 200620)
>> +++ lib/Support/Unix/Process.inc (working copy)
>> @@ -38,6 +38,9 @@
>>  #ifdef HAVE_TERMIOS_H
>>  #  include <termios.h>
>>  #endif
>> +#if defined(HAVE_ARC4RANDOM)
>> +#  include <bsd/stdlib.h>
>>  +#endif
>>
>>
>> 
//===----------------------------------------------------------------------===//
>>  //=== WARNING: Implementation here must contain only generic UNIX code
>> that
>>
>> Then I start fixing up link errors like the following that now require
>> -lbsd:
>>
>> make[2]: Entering directory
`/mnt/ssd/work/svn/lgs/build/utils/fpcmp'
>> llvm[2]: Linking Debug+Asserts executable fpcmp
>>
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
>> In function `llvm::sys::Process::GetRandomNumber()':
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[2]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/fpcmp]
Error 1
>> make[2]: Leaving directory
`/mnt/ssd/work/svn/lgs/build/utils/fpcmp'
>> make[1]: *** [fpcmp/.makeall] Error 2
>> make[1]: Leaving directory `/mnt/ssd/work/svn/lgs/build/utils'
>> make: *** [all] Error 1
>>
>> That'll get resolved with something like this (don't know how
many
>> platforms would need this fix - this should definitely bee ifdef
guarded).
>>
>> tfiala at tfiala2:/mnt/ssd/work/svn/lgs/llvm/utils/fpcmp$ svn diff
Makefile
>> Index: Makefile
>>
==================================================================>> ---
Makefile    (revision 200725)
>> +++ Makefile    (working copy)
>> @@ -12,5 +12,7 @@
>>  USEDLIBS = LLVMSupport.a
>>  NO_INSTALL = 1
>>
>> +LDFLAGS += "-lbsd"
>> +
>>  include $(LEVEL)/Makefile.common
>>
>>
>> But this is just one of several (more below):
>>
>> llvm[4]: Building Debug+Asserts Archive Library libclang.a
>> 
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
>> In function `llvm::sys::Process::GetRandomNumber()':
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/diagtool]
>> Error 1
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/diagtool'
>> make[3]: *** [diagtool/.makeall] Error 2
>> make[3]: *** Waiting for unfinished jobs....
>>
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
>> In function `llvm::sys::Process::GetRandomNumber()':
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[4]: ***
[/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang-format]
>> Error 1
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/clang-format'
>> make[3]: *** [clang-format/.makeall] Error 2
>>
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
>> In function `llvm::sys::Process::GetRandomNumber()':
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/arcmt-test]
>> Error 1
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/arcmt-test'
>> make[3]: *** [arcmt-test/.makeall] Error 2
>>
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
>> In function `llvm::sys::Process::GetRandomNumber()':
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[4]: ***
[/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang-check]
>> Error 1
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/clang-check'
>> make[3]: *** [clang-check/.makeall] Error 2
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/libclang'
>> make[4]: Entering directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/c-index-test'
>> llvm[4]: Compiling c-index-test.c for Debug+Asserts build
>> llvm[4]: Linking Debug+Asserts executable c-index-test
>> /mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libclang.so: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[4]: ***
[/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/c-index-test]
>> Error 1
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/c-index-test'
>> make[3]: *** [all] Error 1
>>
/mnt/ssd/work/svn/lgs/build/Debug+Asserts/lib/libLLVMSupport.a(Process.o):
>> In function `llvm::sys::Process::GetRandomNumber()':
>> /mnt/ssd/work/svn/lgs/llvm/lib/Support/Unix/Process.inc:371: undefined
>> reference to `arc4random'
>> collect2: error: ld returned 1 exit status
>> make[4]: *** [/mnt/ssd/work/svn/lgs/build/Debug+Asserts/bin/clang]
Error 1
>> make[4]: Leaving directory
>> `/mnt/ssd/work/svn/lgs/build/tools/clang/tools/driver'
>> make[3]: *** [driver/.makeall] Error 2
>>
>>
>> We've got it confirmed on another machine here.
>>
>> We build with gcc 4.8.2, Ubuntu 12.04 x86_64, configure-based, with the
>> only non-Ubuntu components being the gcc and a newer libedit required
by
>> some recent changes to lldb.
>>
>> Generally this has been rock solid.  I don't know if something
caused the HAVE_ARC4RANDOM
>> flag to change all of a sudden, but if it did, it happened to two
>> machines simultaneously.
>>
>> Any thoughts?
>>
>>
>> On Mon, Feb 3, 2014 at 4:08 PM, Eric Christopher <echristo at
gmail.com>wrote:
>>
>>> Ah. Weird. I'm not seeing anything. Can you paste the errors
you're
>>> seeing?
>>>
>>> -eric
>>>
>>>
>>> On Mon, Feb 3, 2014 at 3:57 PM, Todd Fiala <tfiala at
google.com> wrote:
>>>
>>>> It's in llvm and clang code.  I haven't gotten to any
of the lldb code
>>>> yet.
>>>>
>>>>
>>>> On Mon, Feb 3, 2014 at 1:33 PM, Eric Christopher <echristo
at gmail.com>wrote:
>>>>
>>>>> Weird. Probably best to send mail to lldb@?
>>>>>
>>>>> -eric
>>>>>
>>>>>
>>>>> On Mon, Feb 3, 2014 at 11:24 AM, Todd Fiala <tfiala at
google.com> wrote:
>>>>>
>>>>>> Hey all,
>>>>>>
>>>>>> FYI -
>>>>>>
>>>>>> We're seeing a whole host of errors around
requiring arc4random and
>>>>>> linkage errors building llvm/clang/lldb from top of
tree.  This is on lldb
>>>>>> builds with Ubuntu 12.04 x86_64, using gcc 4.8.2 and
configure-based
>>>>>> builds.  This appeared to crop up sometime since Friday
morning.  What's
>>>>>> the right fix for that?  Looks to be a dependency on
libbsd?
>>>>>>  --
>>>>>> Todd Fiala | Software Engineer |  tfiala at google.com
|  650-943-3180
>>>>>>
>>>>>> _______________________________________________
>>>>>> LLVM Developers mailing list
>>>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Todd Fiala | Software Engineer |  tfiala at google.com | 
650-943-3180
>>>>
>>>
>>>
>>
>>
>> --
>> Todd Fiala | Software Engineer |  tfiala at google.com |  650-943-3180
>>
>
>

-- 
Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
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Adam Strzelecki

2014-Feb-04 23:56 UTC

head link

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

Huh, I have just hit this issue today’s morning.
> Maybe a machine change? Let's take this off list for now and we can
update when we figure it out. I can't duplicate it.
This issue happens only if libedit-dev is installed on Ubuntu 12.04. This leads
configure to false detect HAVE_ARC4RANDOM, because libedit is being tested
before arc4random, and libedit.so depends on libbsd.so. This makes arc4random
check succeed, even arc4random is not declared anywhere, as plain C just assumes
function existence (no args returning int), then it links with -ledit which
succeeds.

So I am seeing two possible solutions:

(1) either move libedit check after arc4random, so arc4random is checked without
-ledit
(2) make sure arc4random check if function is actually declared, and fail
instead assuming it exists and returns int

Cheers,
-- 
Adam

llvm dev - Feb 2014 - [LLVMdev] linux build broken on Ubuntu 12.04 x86_64

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64

[LLVMdev] linux build broken on Ubuntu 12.04 x86_64