Hi list, I was very happy to see that Boost.Context has been fixed for PPC64. Thanks a lot for that. I was able to verify that the fix worked on the BlueGene/Q. Both on the Head node, which is a POWER7 and the compute nodes which are a PowerPC A2. However, in order to build the library, I needed to manually call the assembler as the predefined commands did not work. For example, the BG/Q provided assembler doesn't know the "--64" switch and the assembler i want to use is called bgclang-as instead of plain as. For the compute nodes, I additionally want to use the -ma2 flag to have the proper assembly generated. Is there a way to have that configurable by the user? Right now, the only way i could find to fix that is to manually edit the Jamfile.v2 in the context build directory. Any advice or hints to fix it properly are highly appreciated. Thanks, Thomas -- Thomas Heller Friedrich-Alexander-Universität Erlangen-Nürnberg Department Informatik - Lehrstuhl Rechnerarchitektur Martensstr. 3 91058 Erlangen Tel.: 09131/85-27018 Fax: 09131/85-27912 Email: thomas.heller@cs.fau.de