[MacPorts] #57420: libfaiss: fatal error: malloc.h: No such file or directory

[MacPorts]

#57420: libfaiss: fatal error: malloc.h: No such file or directory
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  beauby
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  libfaiss
------------------------+----------------------
 [https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/6434/steps
 /install-port/logs/stdio Building libfaiss fails on Mojave]:

 {{{
 /opt/local/bin/g++-mp-7 -fPIC -m64 -Wall -g -O3 -msse4 -mpopcnt -fopenmp
 -Wno-sign-compare -std=c++11 -I/usr/include/malloc/ -c
 IndexScalarQuantizer.cpp -o IndexScalarQuantizer.o
 IndexScalarQuantizer.cpp:14:10: fatal error: malloc.h: No such file or
 directory
  #include <malloc.h>
           ^~~~~~~~~~
 compilation terminated.
 make: *** [IndexScalarQuantizer.o] Error 1
 }}}

 We should never see `-I/usr/include/malloc/` or `#include <malloc.h>` on
 any version macOS. Use `#include <stdlib.h>` instead.

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Ticket URL: <https://trac.macports.org/ticket/57420>
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