nodejs12, nodejs13: error: use of undeclared identifier 'MAP_ANONYMOUS'

[dubiousjim]

A recent attempt to upgrade from nodejs12 @12.15.0_0 to @12.16.0_0, and an attempt to (build and) install nodejs13 @13.8.0_0 failed with a similar error. The logs for each attempt end with errors about the presence of the macro MAP_ANONYMOUS in src/large_pages/node_large_page.cc. (I've already discarded the log, and am disinclined to wait the several hours it takes to get that far in the failed build.) Apparently this macro is undefined on older OSXs. I'm using Mac 10.10.5.

I searched on that, and found ​this discussion, which prompted me to create the attached patch and attempt the build again. With the Portfile modified to include that patch, both nodejs12 and nodejs13 were able to build and install.

[dubiousjim]

patch MAP_ANONYMOUS to fallback to MAP_ANON

[ryandesign (Ryan Carsten Schmidt)]

Here is a log showing the build failure:

​https://build.macports.org/builders/ports-10.7_x86_64-builder/builds/19672/steps/install-port/logs/stdio

../src/large_pages/node_large_page.cc:337:53: error: use of undeclared identifier 'MAP_ANONYMOUS'
              PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
                                                    ^
../src/large_pages/node_large_page.cc:387:29: error: use of undeclared identifier 'MAP_ANONYMOUS'
              MAP_PRIVATE | MAP_ANONYMOUS,
                            ^

If it is not desired to patch the software, the legacysupport portgroup could also be used.