Additional environmental variable on gpp makefile, MacOS

[lucarebuffi]

On MacOs, Xcode > 10 do not recognize the C++ stdlib with the flag -stdlib=libc++

the following line must be added to the makefile in the folder ....../gpp

export CPLUS_INCLUDE_PATH=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1

Right after the declaration of the makefile variables.

[ochubar]

Hi Luca,
We have this section in ../cpp/gcc/Makefile (after line #14):

ifeq ($(OS),Windows_NT)
CC ?= cc
CXX ?= c++
OSFLAG += -DWIN32
else
UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
CC ?= cc
CXX ?= c++
OSFLAG += -DLINUX
endif
ifeq ($(UNAME_S),Darwin)
OSFLAG += -D__MAC__
CC ?= gcc
CXX ?= g++ -stdlib=libc++ -mmacosx-version-min=10.9
endif
endif

Can your please suggest placing your requested line in the "Darwin" / MacOS section, and test if it would work that way; or maybe add another "ifeq" section as necessary?
I am afraid if we add this suggested line without any conditions, we may have issues on other platforms, or / and this Makefile will become even more messy. Unfortunately, I don't have access to MacOS and Xcode right now.

[lucarebuffi]

I completely agree, I was just leaving at you where to put it.

You can totally put that instruction inside the conditional block related to the MAC:

ifeq ($(UNAME_S),Darwin)
OSFLAG += -D__MAC__
CC ?= gcc
CXX ?= g++ -stdlib=libc++ -mmacosx-version-min=10.9
export CPLUS_INCLUDE_PATH=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1
endif