Hello Paweł,
* Paweł Daniluk wrote on Sun, Dec 05, 2010 at 11:16:37PM CET:
> I am trying to run nvcc compiler driver through libtool, and I keep
> getting errors about compiler flags which are not supported by nvcc:
>
> pa...@solea:~/sandbox/libdesc/libdesc/trunk$ /opt/local/bin/glibtool
> --mode=compile --tag=CC nvcc -c -m64 -arch=sm_11 -g -DTIMER
> -Xcompiler -fno-common -I/usr/local/cuda/include/ -o
> cliques_cuda_int.lo cliques_cuda_int.cu
> glibtool: compile: nvcc -c -m64 -arch=sm_11 -g -fno-common -DTIMER
> -I/usr/local/cuda/include/ cliques_cuda_int.cu -fno-common -DPIC -o
> .libs/cliques_cuda_int.o
> nvcc fatal : Unknown option 'fno-common'
>
> This is understandable because -fno-common should be prepended with
> -Xcompiler in nvcc call. One would expect that libtool should do it
> automagically, since it has some kind of CUDA support built in.
>
> What am I doing wrong? Is there any method to override regular
> libtool behavior to put -Xcompiler before flags it adds?
>
> I'm using libtool 2.4 from MacPorts on Mac OS 10.6.5.
Does this patch fix things for you? As far as I see, you should be
getting -fPIC passed instead of -fno-common, so it's not completely
clear that this is right, or what other changes MacPorts has done to
their glibtool code over upstream Libtool. Please also send 'glibtool
--config' output.
OK to apply? OK to add you to THANKS, Paweł?
Thanks,
Ralf
Fix nvcc PIC setting on darwin.
* libltdl/m4/libtool.m4 (_LT_COMPILER_PIC)
<lt_prog_compiler_pic>: Prepend -Xcompiler to nonempty variable
setting rather than hard-coding -Xcompiler -fPIC, for darwin.
* NEWS, THANKS: Update.
Report by Paweł Daniluk.
diff --git a/NEWS b/NEWS
index 1679c58..d8fc3ea 100644
--- a/NEWS
+++ b/NEWS
@@ -18,6 +18,7 @@ New in 2.4.2 2010-12-??: git version 2.4.1a, Libtool team:
not available) works again. Regression introduced in v2.2.6-39-g9c3d4d8.
- The bug that leaked developer tool paths into the release tarballs
from ./bootstrap is fixed.
+ - Improved support for the Cuda Compiler Driver (nvcc) on Darwin.
* Important incompatible changes:
diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 99d66bb..5f18dcb 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -4240,7 +4240,9 @@ m4_if([$1], [CXX], [
case $cc_basename in
nvcc*) # Cuda Compiler Driver 2.2
_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Xlinker '
- _LT_TAGVAR(lt_prog_compiler_pic, $1)='-Xcompiler -fPIC'
+ if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then
+ _LT_TAGVAR(lt_prog_compiler_pic, $1)="-Xcompiler
$_LT_TAGVAR(lt_prog_compiler_pic, $1)"
+ fi
;;
esac
else
