Re: [Boost-users] building on OS X with custom gcc version

AMDG On 06/24/2018 01:32 PM, Damien Hocking via Boost-users wrote:

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On Jun 24, 2018, at 11:22 AM, Steven Watanabe via Boost-users wrote:

On 06/24/2018 09:16 AM, Damien Hocking via Boost-users wrote:

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I’m trying to get 1.65.1 compiled on OSX 10.13.5. I have gcc 8.1 installed and I’ve added it to user-config.jam in the home directory. When I run "bootstrap.sh —with-toolset=gcc" it uses the Darwin gcc toolset, if I try —with-toolset=gcc-8.1 I get an unknown toolset error.

If I use the Darwin-based gcc version of b2 and try and build with gcc 8.1 I get this series of errors:

error: No best alternative for libs/context/build/asm_sources.

Can you post the rest of the error? It should give a list of which alternatives matched or didn't match.

Thanks for the fast response.

This is the full list:

<snip>

Okay. I see what's going on here. Boost.Context only supports darwin and clang on OSX. You can work around the issue by finding this in libs/context/build/Jamfile.v2: # X86_64/SYSV/MACH-O alias asm_sources : asm/make_x86_64_sysv_macho_gas.S asm/jump_x86_64_sysv_macho_gas.S asm/ontop_x86_64_sysv_macho_gas.S : <abi>sysv <address-model>64 <architecture>x86 <binary-format>mach-o <toolset>clang ; and making a copy, replacing clang with gcc.

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and also linker errors from an unknown option -h on ld. I’m assuming this is because b2 built with Darwin gcc doesn’t have the right options for gcc 8. Is there a way to force b2 to be built based on gcc 8 so it gets the assembly and linker options right?

<snip>

Any idea what the ld unknown option: -h comes from?

You may need to set <linker-type>darwin in the toolset initialization. The relevant code was significantly rewritten and it should work automatically in 1.67 (1.66 has significant problems on darwin, and I don't recommend using it.) In Christ, Steven Watanabe