Simon, Edsko luckily already is two steps ahead and filed the ticket as Kazu notes. However, while I *did* see this bug before, I've had a difficult time reproducing it now. None of the builds on my amd64/linux machine this week have triggered it. Kazu - perhaps are you still seeing this consistently on your Mac? I looked around and it *looks* like we actually get the dependency for mkGmpDerivedConstants right. Note under ./libraries/integer-gmp/mkGmpDerivedConstants/ghc.mk we have: --- ... ifneq "$(HaveLibGmp)" "YES" ifneq "$(HaveFrameworkGMP)" "YES" $(libraries/integer-gmp/mkGmpDerivedConstants_dist_depfile_c_asm): libraries/integer-gmp/gmp/gmp.h endif endif ... --- and also in gmp/ghc.mk: --- libraries/integer-gmp/gmp/libgmp.a libraries/integer-gmp/gmp/gmp.h: ... run configure, etc --- I will keep digging on my Mac machine, although it's very slow to build at the moment, so the race may be hard to trigger. On Thu, Aug 15, 2013 at 4:12 PM, Kazu Yamamoto wrote:

Simon,

We have a ticket for this:

http://ghc.haskell.org/trac/ghc/ticket/8102

We guessed the source of this bug as described in this ticket but I don't know how to write GNU Makefile.

--Kazu

...

Austin

This looks like a make-system bug, based on a cursory read. Worth a ticket? Do you know enough about the build system to fix it? It's clearly annoying!

Simon Marlow and/or Ian Lynagh may well be able to help

Simon

-----Original Message----- From: ghc-devs [mailto:ghc-devs-bounces@haskell.org] On Behalf Of Kazu Yamamoto Sent: 06 August 2013 13:00 To: ghc-devs@haskell.org Subject: Re: Building GHC on Mac stops

Hi Nicolas,

My guess is here: libraries/integer-gmp/configure generates "gmp.h". Building mkGmpDerivedConstants starts in parallel. Since "configure" takes time, "mkGmpDerivedConstants" is build before "gmp.h" is created.

How can we ensure that these two jobs are carried out sequentially?

--Kazu

...

I never determined how to fix this. Here's the notes I developed:

tl;dr For some reason, it seems gmp.h is not recognized as a dependency of mkGmpDerivedConstants.o

HTH

-----

If I run

$ perl boot; ./configure; make -j4

I tend to see a build failure. Immediately running make -j4 again succeeds.

In the following snippet from the log, FILE=libraries/integer-gmp/mkGmpDerivedConstants/mkGmpDerivedConstants.c

{{{ "/usr/bin/gcc" -m64 -fno-stack-protector -Ilibraries/integer-gmp/gmp -Ilibraries/integer-gmp/mkGmpDerivedConstants/dist -c FILE -o

libraries/integer-gmp/mkGmpDerivedConstants/dist/build/mkGmpDerivedConstants.o

...

FILE:15:17: error: gmp.h: No such file or directory FILE: In function ¡main¢: FILE:68: error: ¡MP_INT¢ undeclared (first use in this function) FILE:68: error: (Each undeclared identifier is reported only once FILE:68: error: for each function it appears in.) FILE:69: error: expected expression before ¡)¢ token FILE:69: error: expected expression before ¡)¢ token FILE:70: error: expected expression before ¡)¢ token FILE:70: error: expected expression before ¡)¢ token FILE:71: error: expected expression before ¡)¢ token FILE:71: error: expected expression before ¡)¢ token make[1]: ***

...

Error 1 make[1]: *** Waiting for unfinished jobs.... }}}

Some 1677 lines later, I see the line

...

cp libraries/integer-gmp/gmp/gmpbuild/gmp.h libraries/integer-gmp/gmp/

Which is I suppose why make -j4 succeeds the second time around.

I also see

...

libraries/integer-gmp/mkGmpDerivedConstants/ghc.mk:20: libraries/integer-gmp/mkGmpDerivedConstants/dist/build/.depend.c_asm: No such file or directory

many lines above.

On Mon, Aug 5, 2013 at 9:26 PM, Kazu Yamamoto wrote:

...

Hi,

I'm using GHC head (32bit) on Mac. Recently, building GHC head stops:

---- % make maintainer-clean; perl boot; ./configure --prefix=/ghc-head; make -j3 ranlib: file: .libs/libgmp.a(mp_clz_tab.o) has no symbols ranlib: file: .libs/libgmp.a(obprintf.o) has no symbols ranlib: file: .libs/libgmp.a(obvprintf.o) has no symbols ranlib: file: .libs/libgmp.a(obprntffuns.o) has no symbols ranlib: file: .libs/libgmp.a(repl-vsnprintf.o) has no symbols libtool: link: rm -fr .libs/libgmp.lax libtool: link: ( cd ".libs" && rm -f "libgmp.la" && cp -p "../

[libraries/integer-gmp/mkGmpDerivedConstants/dist/build/mkGmpDerivedConstants.o] libgmp.la" "

...

...

libgmp.la" ) cp libraries/integer-gmp/gmp/gmpbuild/gmp.h libraries/integer-gmp/gmp/ cp libraries/integer-gmp/gmp/gmpbuild/.libs/libgmp.a libraries/integer-gmp/gmp/ inplace/bin/mkdirhier libraries/integer-gmp/gmp/objs cd libraries/integer-gmp/gmp/objs && /usr/bin/ar x ../libgmp.a ranlib libraries/integer-gmp/gmp/libgmp.a ranlib: file: libraries/integer-gmp/gmp/libgmp.a(mp_clz_tab.o) has no symbols ranlib: file: libraries/integer-gmp/gmp/libgmp.a(obprintf.o) has no symbols ranlib: file: libraries/integer-gmp/gmp/libgmp.a(obvprintf.o) has no symbols ranlib: file: libraries/integer-gmp/gmp/libgmp.a(obprntffuns.o) has no symbols ranlib: file: libraries/integer-gmp/gmp/libgmp.a(repl-vsnprintf.o) has no symbols make: *** [all] Error 2 % ----

One more "make -j3" finishes the building. I'm sure that this does not happen before.

Are there any guys who get this problem?

--Kazu

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-- Regards, Austin - PGP: 4096R/0x91384671